Patent Application
20180168215
The present disclosure relates generally to nutritional compositions comprising inositol and uses thereof. The nutritional compositions are suitable for administration to pediatric subjects. Further, disclosed are methods for improving cognitive function in target subjects including promoting optimal and functional synaptic development. The disclosed nutritional compositions may provide additive and/or synergistic beneficial health effects.
Human breast milk contains relatively high concentrations of inositol, which suggest that exogenous inositol is required for the postnatal development of formula-fed infants. Accordingly, there exists the need to provide an infant formula or nutritional composition that is capable of providing sufficient levels of inositol in order to promote the health and growth of an infant or child. Furthermore, providing an increased level of inositol can promote synaptic development and cognitive development in infants and children.
In the central nervous system, information is exchanged between neurons at cellular specializations known as synapses. Synapse formation is required to establish neuronal networks and ultimately to organize the human brain, which enables higher cognitive functions. Synapses are specialized neuronal contact sites at which presynaptic release neurotransmitter release machinery is localized opposite a postsynaptic receptor apparatus. Cellular signals instruct the formation of synapses. Generally, once a presynaptic neuron contacts a target neuron, cellular signals instruct neurons to assemble the machinery for neurotransmitter release and detection. The synaptogenic signals that instruct synapse formation are spatially and temporally specific to achieve the concomitant formation of pre- and post-synaptic sites.
The cerebral cortex is the organ that enables human higher cognitive functions. The cortex and the central nervous system rely on precise neuronal circuits to function correctly. These circuits are wired during pre- and post-natal development through the formation of synapses. Synapse density in the human prefrontal cortex typically reaches its maximum after 15 months of age. The number of synapses in the cortex gradually increases in the last two months of gestation and proceeds at a rapid pace for several months after birth, before slowing during the second half of the first year. The initial pattern and formation of synapses is followed by a prolonged period during which synapses are added, remodeled, and/or selectively pruned.
Dietary nutrients can affect synapse formation. However, almost no published information exists on the specific roles of nutrients and natural compounds in synapse formation by neurons. However, there have been findings that elevated magnesium levels in the diet promote synapse number and memory. Further, the unsaturated fatty acid, docosahexaenoic acid, may help modulate key steps of neuronal formation.
Thus, provided herein are nutritional compositions containing inositol in combination with other nutrients that promote neuronal development, including cognitive and synaptic development, when administered to a target subject, such as an infant. Furthermore, the nutritional composition provided herein may include increased levels of inositol compared to human breast milk. Further provided are compositions for improving cognitive development and promoting optimal synaptic function in target subjects, such as formula-fed infants.
Briefly, the present disclosure is directed, in an embodiment, to a nutritional composition that includes inositol. In some embodiments, the nutritional composition includes inositol in combination with at least one of the following: docosahexaenoic acid (DHA), arachidonic acid (ARA), phosphatidylethanolamine (PE), sphingomyelin, lactoferrin, butyrate, alpha lipoic acid, Epigallocatechin gallate (EGCG), sulforaphane, and/or osteopontin.
The present disclosure further provides methods for promoting cognition and synaptic functioning in target subject, such as a pediatric subject, by administering the nutritional composition disclosed herein to the target subject.
It is to be understood that both the foregoing general description and the following detailed description present embodiments of the disclosure and are intended to provide an overview or framework for understanding the nature and character of the disclosure as it is claimed. The description serves to explain the principles and operations of the claimed subject matter. Other and further features and advantages of the present disclosure will be readily apparent to those skilled in the art upon a reading of the following disclosure.
The patent or application file contains at least one drawing executed in color. Copies of this patent or patent application publication with color drawing(s) will be provided by the Office upon request and payment of the necessary fee.
Reference now will be made in detail to the embodiments of the present disclosure, one or more examples of which are set forth herein below. Each example is provided by way of explanation of the nutritional composition of the present disclosure and is not a limitation. In fact, it will be apparent to those skilled in the art that various modifications and variations can be made to the teachings of the present disclosure without departing from the scope of the disclosure. For instance, features illustrated or described as part of one embodiment, can be used with another embodiment to yield a still further embodiment.
Thus, it is intended that the present disclosure covers such modifications and variations as come within the scope of the appended claims and their equivalents. Other objects, features and aspects of the present disclosure are disclosed in or are apparent from the following detailed description. It is to be understood by one of ordinary skill in the art that the present discussion is a description of exemplary embodiments only and is not intended as limiting the broader aspects of the present disclosure.
The present disclosure relates generally to nutritional compositions comprising inositol in combination with other nutrients disclosed herein. Additionally, the disclosure relates to methods for promoting cognition and optimal synaptic formation and function in target subjects.
The disclosure also provides methods for promoting the number of both pre- and excitatory post-synaptic sites in developing neurons in target subjects by administering the nutritional composition disclosed herein. Further provided are methods for increasing the size of pre- and post-synaptic sites in target subjects by administering the nutritional composition disclosed herein, which results in strengthened neurotransmission. Also provided are methods for promoting and/or improving co-localization of pre- and post-synaptic sites in target subjects by administering the nutritional composition disclosed herein.
“Nutritional composition” means a substance or formulation that satisfies at least a portion of a subject's nutrient requirements. The terms “nutritional(s)”, “nutritional formula(s)”, “enteral nutritional(s)”, and “nutritional supplement(s)” are used as non-limiting examples of nutritional composition(s) throughout the present disclosure. Moreover, “nutritional composition(s)” may refer to liquids, powders, gels, pastes, solids, concentrates, suspensions, or ready-to-use forms of enteral formulas, oral formulas, formulas for infants, formulas for pediatric subjects, formulas for children, growing-up milks and/or formulas for adults.
“Pediatric subject” means a human less than 13 years of age. In some embodiments, a pediatric subject refers to a human subject that is between birth and 8 years old. In other embodiments, a pediatric subject refers to a human subject between 1 and 6 years of age. In still further embodiments, a pediatric subject refers to a human subject between 6 and 12 years of age. The term “pediatric subject” may refer to infants (preterm or fullterm) and/or children, as described below.
“Infant” means a human subject ranging in age from birth to not more than one year and includes infants from 0 to 12 months corrected age. The phrase “corrected age” means an infant's chronological age minus the amount of time that the infant was born premature. Therefore, the corrected age is the age of the infant if it had been carried to full term. The term infant includes low birth weight infants, very low birth weight infants, and preterm infants. “Preterm” means an infant born before the end of the 37th week of gestation. “Full term” means an infant born after the end of the 37th week of gestation.
“Child” means a subject ranging in age from 12 months to about 13 years. In some embodiments, a child is a subject between the ages of 1 and 12 years old. In other embodiments, the terms “children” or “child” refer to subjects that are between one and about six years old, or between about seven and about 12 years old. In other embodiments, the terms “children” or “child” refer to any range of ages between 12 months and about 13 years.
“Infant formula” means a composition that satisfies at least a portion of the nutrient requirements of an infant. In the United States, the content of an infant formula is dictated by the federal regulations set forth at 21 C.F.R. Sections 100, 106, and 107.
The term “medical food” refers enteral compositions that are formulated or intended for the dietary management of a disease or disorder. A medical food may be a food for oral ingestion or tube feeding (nasogastric tube), may be labeled for the dietary management of a specific medical disorder, disease or condition for which there are distinctive nutritional requirements, and may be intended to be used under medical supervision.
The term “peptide” as used herein describes linear molecular chains of amino acids, including single chain molecules or their fragments. The peptides described herein include no more than 50 total amino acids. Peptides may further form oligomers or multimers consisting of at least two identical or different molecules. Furthermore, peptidomimetics of such peptides where amino acid(s) and/or peptide bond(s) have been replaced by functional analogs are also encompassed by the term “peptide”. Such functional analogues may include, but are not limited to, all known amino acids other than the 20 gene-encoded amino acids such as selenocysteine.
The term “peptide” may also refer to naturally modified peptides where the modification is effected, for example, by glycosylation, acetylation, phosphorylation and similar modification which are well known in the art. In some embodiments, the peptide component is distinguished from a protein source also disclosed herein. Further, peptides may, for example, be produced recombinantly, semi-synthetically, synthetically, or obtained from natural sources such as after hydrolysation of proteins, including but not limited to casein, all according to methods known in the art.
The term “molar mass distribution” when used in reference to a hydrolyzed protein or protein hydrolysate pertains to the molar mass of each peptide present in the protein hydrolysate. For example, a protein hydrolysate having a molar mass distribution of greater than 500 Daltons means that each peptide included in the protein hydrolysate has a molar mass of at least 500 Daltons. Accordingly, in some embodiments, the peptides disclosed in Table 2 and Table 3 are derived from a protein hydrolysate having a molar mass distribution of greater than 500 Daltons. To produce a protein hydrolysate having a molar mass distribution of greater than 500 Daltons, a protein hydrolysate may be subjected to certain filtering procedures or any other procedure known in the art for removing peptides, amino acids, and/or other proteinaceous material having a molar mass of less than 500 Daltons. For the purposes of this disclosure, any method known in the art may be used to produce the protein hydrolysate having a molar mass distribution of greater than 500 Dalton.
The term “protein equivalent” or “protein equivalent source” includes any protein source, such as soy, egg, whey, or casein, as well as non-protein sources, such as peptides or amino acids. Further, the protein equivalent source can be any used in the art, e.g., nonfat milk, whey protein, casein, soy protein, hydrolyzed protein, peptides, amino acids, and the like. Bovine milk protein sources useful in practicing the present disclosure include, but are not limited to, milk protein powders, milk protein concentrates, milk protein isolates, nonfat milk solids, nonfat milk, nonfat dry milk, whey protein, whey protein isolates, whey protein concentrates, sweet whey, acid whey, casein, acid casein, caseinate (e.g. sodium caseinate, sodium calcium caseinate, calcium caseinate), soy bean proteins, and any combinations thereof. The protein equivalent source can, in some embodiments comprise hydrolyzed protein, including partially hydrolyzed protein and extensively hydrolyzed protein. The protein equivalent source may, in some embodiments, include intact protein. More particularly, the protein source may include a) about 20% to about 80% of the peptide component described herein, and b) about 20% to about 80% of an intact protein, a hydrolyzed protein, or a combination thereof.
The term “protein equivalent source” also encompasses free amino acids. In some embodiments, the amino acids may comprise, but are not limited to, histidine, isoleucine, leucine, lysine, methionine, cysteine, phenylalanine, tyrosine, threonine, tryptophan, valine, alanine, arginine, asparagine, aspartic acid, glutamic acid, glutamine, glycine, proline, serine, carnitine, taurine and mixtures thereof. In some embodiments, the amino acids may be branched chain amino acids. In certain other embodiments, small amino acid peptides may be included as the protein component of the nutritional composition. Such small amino acid peptides may be naturally occurring or synthesized.
“Milk fat globule membrane” includes components found in the milk fat globule membrane including but not limited to milk fat globule membrane proteins such as Mucin 1, Butyrophilin, Adipophilin, CD36, CD14, Lactadherin (PAS6/7), Xanthine oxidase and Fatty Acid binding proteins etc. Additionally, “milk fat globule membrane” may include phospholipids, cerebrosides, gangliosides, sphingomyelins, and/or cholesterol.
The term “growing-up milk” refers to a broad category of nutritional compositions intended to be used as a part of a diverse diet in order to support the normal growth and development of a child between the ages of about 1 and about 6 years of age.
“Milk” means a component that has been drawn or extracted from the mammary gland of a mammal. In some embodiments, the nutritional composition comprises components of milk that are derived from domesticated ungulates, ruminants or other mammals or any combination thereof.
“Nutritionally complete” means a composition that may be used as the sole source of nutrition, which would supply essentially all of the required daily amounts of vitamins, minerals, and/or trace elements in combination with proteins, carbohydrates, and lipids. Indeed, “nutritionally complete” describes a nutritional composition that provides adequate amounts of carbohydrates, lipids, essential fatty acids, proteins, essential amino acids, conditionally essential amino acids, vitamins, minerals and energy required to support normal growth and development of a subject.
A nutritional composition that is “nutritionally complete” for a full term infant will, by definition, provide qualitatively and quantitatively adequate amounts of all carbohydrates, lipids, essential fatty acids, proteins, essential amino acids, conditionally essential amino acids, vitamins, minerals, and energy required for growth of the full term infant.
A nutritional composition that is “nutritionally complete” for a child will, by definition, provide qualitatively and quantitatively adequate amounts of all carbohydrates, lipids, essential fatty acids, proteins, essential amino acids, conditionally essential amino acids, vitamins, minerals, and energy required for growth of a child.
“Inherent inositol”, “endogenous inositol” or “inositol from endogenous sources” each refer to inositol present in the composition that is not added as such, but is present in other components or ingredients of the composition; the inositol is naturally present in such other components. Contrariwise, “exogenous” inositol is inositol which is intentionally included in the nutritional composition of the present disclosure itself, rather than as an element of another component.
“Exogenous butyrate” or “dietary butyrate” each refer to butyrate or butyrate derivatives which are intentionally included in the nutritional composition of the present disclosure itself, rather than generated in the gut.
“Endogenous butyrate” or “butyrate from endogenous sources” each refer to butyrate present in the gut as a result of ingestion of the disclosed composition that is not added as such, but is present as a result of other components or ingredients of the composition; the presence of such other components or ingredients of the composition stimulates butyrate production in the gut.
“Probiotic” means a microorganism with low or no pathogenicity that exerts a beneficial effect on the health of the host.
The term “non-viable probiotic” means a probiotic wherein the metabolic activity or reproductive ability of the referenced probiotic has been reduced or destroyed. More specifically, “non-viable” or “non-viable probiotic” means non-living probiotic microorganisms, their cellular components and/or metabolites thereof. Such non-viable probiotics may have been heat-killed or otherwise inactivated. The “non-viable probiotic” does, however, still retain, at the cellular level, its cell structure or other structure associated with the cell, for example exopolysaccharide and at least a portion its biological glycol-protein and DNA/RNA structure and thus retains the ability to favorably influence the health of the host. Contrariwise, the term “viable” refers to live microorganisms. As used herein, the term “non-viable” is synonymous with “inactivated”.
“Prebiotic” means a non-digestible food ingredient that beneficially affects the host by selectively stimulating the growth and/or activity of one or a limited number of bacteria in the digestive tract that can improve the health of the host.
“Phospholipids” means an organic molecule that contains a diglyceride, a phosphate group and a simple organic molecule. Examples of phospholipids include but are not limited to, phosphatidic acid, phosphatidylethanolamine, phosphatidylcholine, phosphatidylserine, phsphatidylinositol, phosphatidylinositol phosphate, phosphatidylinositol biphosphate and phosphatidylinositol triphosphate, ceramide phosphorylcholine, ceramide phosphorylethanolamine and ceramide phosphorylglycerol. This definition further includes sphingolipids such as sphingomyelin. Glycosphingolipds are quantitatively minor constituents of the MFGM, and consist of cerebrosides (neutral glycosphingolipids containing uncharged sugars) and gangliosides. Gangliosides are acidic glycosphingolipids that contain sialic acid (N-acetylneuraminic acid (NANA)) as part of their carbohydrate moiety. There are various types of gangliosides originating from different synthetic pathways, including GM3, GM2, GM1a, GD1a, GD3, GD2, GD1b, GT1b and GQ1b (Fujiwara et al., 2012). The principal gangliosides in milk are GM3 and GD3 (Pan & Izumi, 1999). The different types of gangliosides vary in the nature and length of their carbohydrate side chains, and the number of sialic acid attached to the molecule.
“Alpha-lipoic acid”, abbreviated “ALA” herein, refers to an organosulfur compound derived from octanoic acid having the molecular formula C8H14S2O2. Generally, ALA contains two sulfur atoms attached via a disulfide bond. Alpha-lipoic acid is synonymous with lipoic acid, abbreviated “LA”, and the two terms and abbreviations may be used interchangeable herein.
As used herein “sulforaphane” includes any known isomers of sulforaphane including but not limited to L-sulforaphane. In some embodiments, sulforaphane may include only L-sulforaphane while, in other embodiments, the reference to sulforaphane may include L-sulforaphane, D-sulforaphane, any other suitable isomer of sulforaphane, and any combinations thereof. Accordingly, the term sulforaphane as used herein includes any isomers of sulforaphane including, but not limited to, stereoisomers, optical isomers, structural isomers, enantiomers, geometric isomers, and combinations thereof.
The nutritional composition of the present disclosure may be substantially free of any optional or selected ingredients described herein, provided that the remaining nutritional composition still contains all of the required ingredients or features described herein. In this context, and unless otherwise specified, the term “substantially free” means that the selected composition may contain less than a functional amount of the optional ingredient, typically less than 0.1% by weight, and also, including zero percent by weight of such optional or selected ingredient.
All percentages, parts and ratios as used herein are by weight of the total composition, unless otherwise specified.
All references to singular characteristics or limitations of the present disclosure shall include the corresponding plural characteristic or limitation, and vice versa, unless otherwise specified or clearly implied to the contrary by the context in which the reference is made.
All combinations of method or process steps as used herein can be performed in any order, unless otherwise specified or clearly implied to the contrary by the context in which the referenced combination is made.
The methods and compositions of the present disclosure, including components thereof, can comprise, consist of, or consist essentially of the essential elements and limitations of the embodiments described herein, as well as any additional or optional ingredients, components or limitations described herein or otherwise useful in nutritional compositions.
As used herein, the term “about” should be construed to refer to both of the numbers specified as the endpoint(s) of any range. Any reference to a range should be considered as providing support for any subset within that range.
Inositol is transported across the blood-brain barrier by simple diffusion and a stereospecific saturation transport system. Moreover, the brain can take up inositol after exogenous administration. It has thus been found that oral administration of inositol can engender enhanced neurological conditions for brain benefits.
Further, nutritional supplementation of inositol represents a feasible and effective approach to promote oligodendrocyte survival and proliferation in a dose dependent manner, resulting in a consistent increase in the number of oligodendrocyte precursor cells. Nutritional supplementation with inositol provides benefits for enhanced developmental myelination which translates to a fundamental benefit for brain development. Given the importance of functional myelination, nutritional supplementation of inositol is beneficial to pediatric and adult subjects by enhancing brain development and health. Because the nature and characteristics of inositol allow it to cross the blood brain barrier, inositol can be considered a novel brain nutrient, synergizing with other nutrients to provide comprehensive brain development benefits. Moreover, the positive effects on enhanced developmental myelination from inositol can be beneficial for preterm infants as well as those diagnosed with white matter diseases (such as cerebral palsy and periventricular leukomalacia). Inositol can also be beneficial in other situations where myelination can be an issue, such as with patients having multiple sclerosis and in post radiation supplementation for promotion of recovery of OPCs. Moreover, the sweet taste of inositol provides further advantages in terms of palatability to consumers, especially infants and children.
In certain embodiments, inositol is present in the nutritional composition of the present disclosure at a level of at least about 9 mg/100 kcal; in other embodiments, inositol should be present at a level of no greater than about 42 mg/100 kcal. In still other embodiments, the nutritional composition comprises inositol at a level of about 12 mg/100 kcal to about 40 mg/100 kcal. In a further embodiment, inositol is present in the nutritional composition at a level of about 17 mg/100 kcal to about 37 mg/100 kcal. Moreover, inositol can be present as exogenous inositol or inherent inositol. In embodiments, a major fraction of the inositol (i.e., at least 40%) is exogenous inositol. In certain embodiments, the ratio of exogenous to inherent inositol is at least 50:50; in other embodiments, the ratio of exogenous to inherent inositol is at least 65:35. In still other embodiments, the ratio of exogenous inositol to inherent inositol in the disclosed nutritional composition is at least 75:25.
In some embodiments, the nutritional composition includes a source of dietary butyrate that is present in an amount of from about 0.01 mg/100 Kcal to about 300 mg/100 Kcal. In some embodiments, the nutritional composition includes a source of dietary butyrate that is present in an amount of from about 0.1 mg/100 Kcal to about 300 mg/100 Kcal. In some embodiments, the nutritional composition includes a source of dietary butyrate that is present in an amount of from about 1 mg/100 Kcal to about 275 mg/100 Kcal. In some embodiments, the nutritional composition includes a source of dietary butyrate that is present in an amount of from about 5 mg/100 Kcal to about 200 mg/100 Kcal. In some embodiments, the nutritional composition includes a source of dietary butyrate that is present in an amount of from about 10 mg/100 Kcal to about 150 mg/100 Kcal.
In some embodiments, the nutritional composition includes a source of dietary butyrate that is present in an amount based on the weight percentage of total fat. Accordingly, in some embodiments the nutritional composition includes from about 0.2 mg to about 57 mg of dietary butyrate per gram of fat in the nutritional composition. In some embodiments, the nutritional compositions includes from about 1 mg to about 50 mg of dietary butyrate per gram of fat in the nutritional composition. Still, in some embodiments the nutritional composition includes from about 5 mg to about 40 mg of dietary butyrate per gram of fat in the nutritional composition. In certain embodiments, the nutritional composition includes from about 10 mg to about 30 mg of dietary butyrate per gram of fat in the nutritional composition.
In some embodiments, the nutritional composition includes a source of dietary butyrate that is present in an amount based on a liter of formula. In some embodiments, the nutritional composition includes from about 0.6 mg to about 2100 mg of dietary butyrate per Liter of nutritional composition. In some embodiments, the nutritional composition includes from about 2 mg to about 2000 mg of dietary butyrate per Liter of nutritional composition. In some embodiments, the nutritional composition includes from about 10 mg to about 1800 mg of dietary butyrate per Liter of nutritional composition. In some embodiments, the nutritional composition includes from about 25 mg to about 1600 mg of dietary butyrate per Liter of nutritional composition. In some embodiments, the nutritional composition includes from about 40 mg to about 1400 mg of dietary butyrate per Liter of nutritional composition. In some embodiments, the nutritional composition includes from about 50 mg to about 1200 mg of dietary butyrate per Liter of nutritional composition. In some embodiments, the nutritional composition includes from about 100 mg to about 1000 mg of dietary butyrate per Liter of nutritional composition.
In some embodiments the dietary butyrate is provided by one or more of the following: butyric acid; butyrate salts, including sodium butyrate, potassium butyrate, calcium butyrate, and/or magnesium butyrate; glycerol esters of butyric acid; and/or amide derivatives of butyric acid.
The dietary butyrate can be supplied by any suitable source known in the art. Non-limiting sources of dietary butyrate includes animal source fats and derived products, such as but not limited to milk, milk fat, butter, buttermilk, butter serum, cream; microbial fermentation derived products, such as but not limited to yogurt and fermented buttermilk; and plant source derived seed oil products, such as pineapple and/or pineapple oil, apricot and/or apricot oil, barley, oats, brown rice, bran, green beans, legumes, leafy greens, apples, kiwi, oranges. In some embodiments, the dietary butyrate is synthetically produced. In embodiments where the dietary butyrate is synthetically produced, the chemical structure of the dietary butyrate may be modified as necessary. Further, the dietary butyrate produced synthetically can be purified by any means known in the art to produce a purified dietary butyrate additive that can be incorporated into the nutritional compositions disclosed herein. The dietary butyrate may be provided by dairy lipids and/or triglyceride bound forms of butyrate.
In some embodiments, the dietary butyrate may be provided in an encapsulated form. In certain embodiments, the encapsulation of the dietary butyrate may provide for longer shelf-stability and may provide for improved organoleptic properties of the nutritional composition. For example, in some embodiments, the dietary butyrate may be encapsulated or coated by the use of, or combination of, fat derived materials, such as mono- and di-glycerides; sugar and acid esters of glycerides; phospholipids; plant, animal and microbial derived proteins and hydrocolloids, such as starches, maltodextrins, gelatin, pectins, glucans, caseins, soy proteins, and/or whey proteins.
The dietary butyric acid may also be provided in a coated form. For example, coating certain glycerol esters of butyric acids with fat derived materials, such as mono- and di-glycerides; sugar and acid esters of glycerides; phospholipids; plant, animal and microbial derived proteins and hydrocolloids, such as starches, maltodextrins, gelatin, pectins, glucans, caseins, soy proteins, and/or whey proteins may improve the shelf-stability of the dietary butyrate and may further improve the overall organoleptic properties of the nutritional composition.
In certain embodiments, the dietary butyrate comprises alkyl, and or glycerol esters of butyric acid. Glycerol esters of butyric acid may offer minimal complexity when formulated and processed in the nutritional composition. Additionally, glycerol esters of butyric acid may improve the shelf life of the nutritional composition including dietary butyrate an may further have a low impact on the sensory attributes of the finished product.
The dietary butyrate comprises amide derivatives of butyric acid in some embodiments. Generally, these amide derivatives of butyric acid are a solid, odorless, and tasteless form and are more stable than certain butyric acid esters at gastric pH. Further, the amide derivatives of butyric acid are able to release the corresponding acid by alkaline hydrolysis in the small and large intestine, thereby allowing for absorption of the dietary butyrate.
In some embodiments, the dietary butyrate may comprise butyrate salts, for example, sodium butyrate, potassium butyrate, calcium butyrate, magnesium butyrate, and combinations thereof. In some embodiments, the use of selected dietary butyrate salts may improve intestinal health when provided to target subjects. In certain embodiments, dietary butyrate comprises a suitable butyrate salt that has been coated with one or more fats or lipids. In certain embodiments wherein the dietary butyrate comprises a fat coated butyrate salt, the nutritional composition may be a dry-powdered composition into which the dietary butyrate is incorporated.
In some embodiments, the dietary butyrate may comprise any of the butyrate compounds disclosed herein that are formulated to be in complex form with chitosan or one or cyclodextrins. For example, cyclodextrins are cyclic oligosaccharides composed of six (a-cyclodextrin), seven (β-cyclodextrin), or eight (gamma-cyclodextrin) units of a-1,4-glucopyranose. Cyclodextrins are further characterized by a hydrophilic exterior surface and a hydrophobic core. Without being bound by any particular theory, the aliphatic butyrate chain would form a complex with the cyclodextrin core, thus increasing its molecular weight and, thus, reducing the volatility of the butyrate compound. Accordingly, the bioavailability of dietary butyrate may be improved when the dietary butyrate includes butyrate compounds in complex form with one or more cyclodextrins. Further, cyclodextrins are bulky hydrophobic molecules that are resistant to stomach acid as well as gastrointestinal enzymes, thus administration of the butyrate-cyclodextrin complex as described herein would promote absorption of the dietary butyrate in the small intestines.
In some embodiments the dietary butyrate is provided from an enriched lipid fraction derived from milk. For example, bovine milk fat has a butyric acid content that may be 20 times higher than the butyric acid content in human milk fat. Furthermore, among the short chain fatty acids (“SCFAs”) present in human milk, i.e. fatty acids having a carbon chain length from 4 to 12, butyric acid (C4) is one of the most predominant in bovine milk. As such, bovine milk fat and/or enriched fractions of bovine milk fat may be included in a nutritional composition to provide dietary butyrate.
In embodiments where the dietary butyrate is provided by an enriched lipid fraction derived from milk the enriched lipid fraction derived from milk may be produced by any number of fractionation techniques. These techniques include but are not limited to melting point fractionation, organic solvent fractionation, super critical fluid fractionation, and any variants and combinations thereof.
In some embodiments, the nutritional composition may include an enriched milk product, such as an enriched whey protein concentrate (eWPC). Enriched milk product generally refers to a milk product that has been enriched with certain milk fat globule membrane (MFGM) components, such as proteins and lipids found in the MFGM. The enriched milk product can be formed by, e.g., fractionation of non-human (e.g., bovine) milk. Enriched milk products have a total protein level which can range between 20% and 90%, more preferably between 68% and 80%, of which between 3% and 50% is MFGM proteins; in some embodiments, MFGM proteins make up from 7% to 13% of the enriched milk product protein content. Enriched milk products also comprise from 0.5% to 5% (and, at times, 1.2% to 2.8%) sialic acid, from 2% to 25% (and, in some embodiments, 4% to 10%) phospholipids, from 0.4% to 3% sphingomyelin, from 0.05% to 1.8%, and, in certain embodiments 0.10% to 0.3%, gangliosides and from 0.02% to about 1.2%, more preferably from 0.2% to 0.9%, cholesterol. Thus, enriched milk products include desirable components at levels higher than found in bovine and other non-human milks.
In some embodiments, the enriched milk product may contain certain polar lipids such as (1) Glycerophospholipids such as phosphatidylcholine (PC), phosphatidylethanolamine (PE), phosphatidylserine (PS), and phosphatidylinositol (PI), and their derivatives and (2) Sphingoids or sphingolipids such as sphingomyelin (SM) and glycosphingolipids comprising cerebrosides (neutral glycosphingolipids containing uncharged sugars) and the gangliosides (GG, acidic glycosphingolipids containing sialic acid) and their derivatives.
PE is a phospholipid found in biological membranes, particularly in nervous tissue such as the white matter of brain, nerves, neural tissue, and in spinal cord, where it makes up 45% of all phospholipids. Sphingomyelin is a type of sphingolipid found in animal cell membranes, especially in the membranous myelin sheath that surrounds some nerve cell axons. It usually consists of phosphocholine and ceramide, or a phosphoethanolamine head group; therefore, sphingomyelins can also be classified as sphingophospholipids. In humans, SM represents ˜85% of all sphingolipids, and typically makes up 10-20 mol % of plasma membrane lipids. Sphingomyelins are present in the plasma membranes of animal cells and are especially prominent in myelin, a membranous sheath that surrounds and insulates the axons of some neurons.
In some embodiments, the enriched milk product includes eWPC. The eWPC may be produced by any number of fractionation techniques. These techniques include but are not limited to melting point fractionation, organic solvent fractionation, super critical fluid fractionation, and any variants and combinations thereof. Alternatively, eWPC is available commercially, including under the trade names Lacprodan MFGM-10 and Lacprodan PL-20, both available from Arla Food Ingredients of Viby, Denmark. With the addition of eWPC, the lipid composition of infant formulas and other pediatric nutritional compositions can more closely resemble that of human milk. For instance, the theoretical values of phospholipids (mg/L) and gangliosides (mg/L) in an exemplary infant formula which includes Lacprodan MFGM-10 or Lacprodan PL-20 can be calculated as shown in Table 1:
In some embodiments, the eWPC is included in the nutritional composition of the present disclosure at a level of about 0.5 grams per liter (g/L) to about 10 g/L; in other embodiments, the eWPC is present at a level of about 1 g/L to about 9 g/L. In still other embodiments, eWPC is present in the nutritional composition at a level of about 3 g/L to about 8 g/L. Alternatively, in certain embodiments, the eWPC is included in the nutritional composition of the present disclosure at a level of about 0.06 grams per 100 Kcal (g/100 Kcal) to about 1.5 g/100 Kcal; in other embodiments, the eWPC is present at a level of about 0.3 g/100 Kcal to about 1.4 g/100 Kcal. In still other embodiments, the eWPC is present in the nutritional composition at a level of about 0.4 g/100 Kcal to about 1 g/100 Kcal.
Total phospholipids in the nutritional composition disclosed herein (i.e., including phospholipids from the eWPC as well as other components, but not including phospholipids from plant sources such as soy lecithin, if used) is in a range of about 50 mg/L to about 2000 mg/L; in some embodiments it is about 100 mg/L to about 1000 mg/L, or about 150 mg/L to about 550 mg/L. In certain embodiments, the eWPC component also contributes sphingomyelin in a range of about 10 mg/L to about 200 mg/L; in other embodiments, it is about 30 mg/L to about 150 mg/L, or about 50 mg/L to about 140 mg/L. And, the eWPC can also contribute gangliosides, which in some embodiments, are present in a range of about 2 mg/L to about 40 mg/L, or, in other embodiments about 6 mg/L to about 35 mg/L. In still other embodiments, the gangliosides are present in a range of about 9 mg/L to about 30 mg/L. In some embodiments, total phospholipids in the nutritional composition (again not including phospholipids from plant sources such as soy lecithin) is in a range of about 6 mg/100 Kcal to about 300 mg/100 Kcal; in some embodiments it is about 12 mg/100 Kcal to about 150 mg/100 Kcal, or about 18 mg/100 Kcal to about 85 mg/100 Kcal. In certain embodiments, the eWPC also contributes sphingomyelin in a range of about 1 mg/100 Kcal to about 30 mg/100 Kcal; in other embodiments, it is about 3.5 mg/100 Kcal to about 24 mg/100 Kcal, or about 6 mg/100 Kcal to about 21 mg/100 Kcal. And, gangliosides can be present in a range of about 0.25 mg/100 Kcal to about 6 mg/100 Kcal, or, in other embodiments about 0.7 mg/100 Kcal to about 5.2 mg/100 Kcal. In still other embodiments, the gangliosides are present in a range of about 1.1 mg/100 Kcal to about 4.5 mg/100 Kcal.
In some embodiments, the eWPC contains sialic acid (SA). Generally, the term sialic acid (SA) is used to generally refer to a family of derivatives of neuraminic acid. N-acetylneuraminic acid (Neu5Ac) and N-glycolylneuraminic acid (Neu5Gc) are among the most abundant naturally found forms of SA, especially Neu5Ac in human and cow's milk. Mammalian brain tissue contains the highest levels of SA because of its incorporation into brain-specific proteins such as neural cell adhesion molecule (NCAM) and lipids (e.g., gangliosides). It is considered that SA plays a role in neural development and function, learning, cognition, and memory throughout the life. In human milk, SA exists as free and bound forms with oligosaccharides, protein and lipid. The content of SA in human milk varies with lactation stage, with the highest level found in colostrum. However, most SA in bovine milk is bound with proteins, compared to the majority of SA in human milk bound to free oligosaccharides. Sialic acid can be incorporated in to the disclosed nutritional composition as is, or it can be provided by incorporating casein glycomacropeptide (cGMP) having enhanced sialic acid content, as discussed in U.S. Pat. Nos. 7,867,541 and 7,951,410, the disclosure of each of which are incorporated by reference herein.
When present, sialic acid can be incorporated into the nutritional composition of the present disclosure at a level of about 100 mg/L to about 800 mg/L, including both inherent sialic acid from the eWPC and exogenous sialic acid and sialic acid from sources such as cGMP. In some embodiments, sialic acid is present at a level of about 120 mg/L to about 600 mg/L; in other embodiments the level is about 140 mg/L to about 500 mg/L. In certain embodiments, sialic acid may be present in an amount from about 1 mg/100 Kcal to about 120 mg/100 Kcal. In other embodiments sialic acid may be present in an amount from about 14 mg/100 Kcal to about 90 mg/100 Kcal. In yet other embodiments, sialic acid may be present in an amount from about 15 mg/100 Kcal to about 75 mg/100 Kcal.
In certain embodiments, the nutritional composition may further include at least one organosulfur compound including, alpha-lipoic acid (ALA), allyl sulfide, allyl disulfide, sulforaphane (SFN), L-sulforaphane (L-SFN), and combinations thereof.
Allyl sulfide, also commonly known as diallyl sulfide is an organosulfur compound with the chemical formula C6H10S. Allyl sulfides, for example diallyl sulfide, diallyl disulfide, and diallyl trisulfide, are principle constituents of garlic oil. In vivo allyl sulfide may be converted to diallyl sulfoxide and diallyl sulfone by cytochrome P450 2E1 (CYP2E1).
Sulforaphane (SFN) is a molecule within the isothiocyanate group of organosulfur compounds having the molecular formula C6H11NOS2. SFN and its isomers, for example L-Sulforaphane (“L-SFN”), are known to exhibit anti-cancer and antimicrobial properties in experimental models. SFN may be obtained from cruciferous vegetables, such as broccoli, Brussels sprouts or cabbage. SFN is produced when the enzyme myrosinase reacts with glucoraphanin, a glucosinolate, transforming glucoraphanin into SFN.
In some embodiments, the at least one organosulfur compound incorporated into the nutritional composition comprises ALA. Examples of ALA suitable for use in the nutritional composition disclosed herein include, but are not limited to, enantiomers and racemic mixtures of ALA, including, R-lipoic acid “RLA”, S-lipoic acid “SLA”, and R/S-LA. Also suitable is R-lipoic acid stabilized with either sodium (“Na-RALA”) or potassium as Potassium-R-Lipoate.
When incorporated into a nutritional composition for practicing the method of the present disclosure, ALA may be present in the nutritional composition, in some embodiments in an amount from about 0.1 mg/100 Kcal to about 35 mg/100 Kcal. In some embodiments, ALA may be present in an amount from about 2.0 mg/100 Kcal to about 25 mg/100 Kcal. In still other embodiments, ALA may be present in an amount from about 5.0 mg/100 Kcal to about 15 mg/100 Kcal.
In some embodiments, the organosulfur compound incorporated into the nutritional composition is allyl disulfide. Allyl disulfide may be present in the nutritional composition, in some embodiments, in an amount from about 1 mg/100 Kcal to about 170 mg/100 Kcal. In still some embodiments, allyl disulfide may be present from about 50 mg/100 Kcal to about 120 mg/100 Kcal. In still other embodiments, allyl disulfide may be present from about 75 mg/100 Kcal to about 100 mg/100 Kcal.
Sulforaphane, which includes L-sulforaphane, may be incorporated into the nutritional composition in an amount from about 1.5 mg/100 Kcal to about 7.5 mg/100 Kcal. Still in some embodiments, sulforaphane may be present in an amount from about 2 mg/100 Kcal to about 6 mg/100 Kcal. In some embodiments, sulforaphane may be present in an amount from about 3 mg/100 Kcal to about 5 mg/100 Kcal.
In some embodiments, the nutritional composition comprises a source of flavan-3-ols. Flavan-3-ols which are suitable for use in the inventive nutritional composition include catechin, epicatechin (EC), gallocatechin, epigallocatechin (EGC), epicatechin gallate (ECG), epicatechin-3-gallate, epigallocatechin gallate (EGCG), and combinations thereof. In certain embodiments, the nutritional composition comprises EGCG.
In some embodiments, EGCG may be present in the nutritional composition in an amount from about 0.01 mg/100 Kcal to about 18 mg/100 Kcal. In some embodiments, EGCG may be present in an amount of from about 0.06 mg/100 Kcal to about 10 mg/100 Kcal. In some embodiments, EGCG may be present in an amount of from about 0.10 mg/100 Kcal to about 5.0 mg/100 Kcal. In some embodiments, EGCG may be present in an amount of from about 0.90 mg/100 Kcal to about 3.0 mg/100 Kcal.
In some embodiments, the nutritional composition may include osteopontin. Osteopontin (OPN) is also known by several other names including: bone sialoprotein I (BSP-1 or BNSP), early T-lymphocyte activation (ETA-1, secreted phosphoprotein (SPP1), 2ar and Rickettsia resistance (Ric). OPN is a secreted 44 kDa protein that undergoes heavy posttranslational phosphorylation and carbohydrate modifications. It is related to the ‘Small integrin binding ligand N-linked glycoproteins’ (SIBLINGs) and ‘Secreted protein acidic and rich in cysteine’ (SPARC) protein. OPN is biosynthesized by a variety of tissue types and its processing exposes an epitope for integrin receptors. Osteopontin is abundant in breast milk, especially in human milk with around 138 mg/I, 2.1% (wt/wt) of total milk protein. The concentration of OPN in human milk is significantly higher than that in bovine milk (18 mg/I) and an infant formula (9 mg/I). Osteopontin in breast milk is resistant to digestion and ingested osteopontin will reach to intestine and is taken up there. It positively regulates cell migration and cellular chemotaxis via binding to integrin receptors and promotes bone remodeling and immune responses. The protein can be transported to the brain, suggesting a special value to the growing infant on brain development with long term health benefits on functional outcomes. The source of OPN can be enriched from bovine milk.
The nutritional composition of the present disclosure also includes at least one probiotic; in a preferred embodiment, the probiotic comprises Lactobacillus rhamnosus GG (“LGG”) (ATCC 53103). In certain other embodiments, the probiotic may be selected from any other Lactobacillus species, Bifidobacterium species, Bifidobacterium longum BB536 (BL999, ATCC: BAA-999), Bifidobacterium longum AH1206 (NCIMB: 41382), Bifidobacterium breve AH1205 (NCIMB: 41387), Bifidobacterium infantis 35624 (NCIMB: 41003), and Bifidobacterium animalis subsp. lactis BB-12 (DSM No. 10140) or any combination thereof.
The amount of the probiotic may vary from about 1×104 to about 1.5×1012 cfu of probiotic(s) per 100 Kcal. In some embodiments the amount of probiotic may be from about 1×106 to about 1×109 cfu of probiotic(s) per 100 Kcal. In certain other embodiments the amount of probiotic may vary from about 1×107 cfu/100 Kcal to about 1×108 cfu of probiotic(s) per 100 Kcal.
As noted, in a preferred embodiment, the probiotic comprises LGG. LGG is a probiotic strain isolated from healthy human intestinal flora. It was disclosed in U.S. Pat. No. 5,032,399 to Gorbach, et al., which is herein incorporated in its entirety, by reference thereto. LGG is resistant to most antibiotics, stable in the presence of acid and bile, and attaches avidly to mucosal cells of the human intestinal tract. It survives for 1-3 days in most individuals and up to 7 days in 30% of subjects. In addition to its colonization ability, LGG also beneficially affects mucosal immune responses. LGG is deposited with the depository authority American Type Culture Collection (“ATCC”) under accession number ATCC 53103.
In an embodiment, the probiotic(s) may be viable or non-viable. The probiotics useful in the present disclosure may be naturally-occurring, synthetic or developed through the genetic manipulation of organisms, whether such source is now known or later developed.
In some embodiments, the nutritional composition may include a source comprising probiotic cell equivalents, which refers to the level of non-viable, non-replicating probiotics equivalent to an equal number of viable cells. The term “non-replicating” is to be understood as the amount of non-replicating microorganisms obtained from the same amount of replicating bacteria (cfu/g), including inactivated probiotics, fragments of DNA, cell wall or cytoplasmic compounds. In other words, the quantity of non-living, non-replicating organisms is expressed in terms of cfu as if all the microorganisms were alive, regardless whether they are dead, non-replicating, inactivated, fragmented etc. In non-viable probiotics are included in the nutritional composition, the amount of the probiotic cell equivalents may vary from about 1×104 to about 1.5×1010 cell equivalents of probiotic(s) per 100 Kcal. In some embodiments the amount of probiotic cell equivalents may be from about 1×106 to about 1×109 cell equivalents of probiotic(s) per 100 Kcal nutritional composition. In certain other embodiments the amount of probiotic cell equivalents may vary from about 1×107 to about 1×108 cell equivalents of probiotic(s) per 100 Kcal of nutritional composition.
In some embodiments, the probiotic source incorporated into the nutritional composition may comprise both viable colony-forming units, and non-viable cell-equivalents.
While probiotics may be helpful in pediatric patients, the administration of viable bacteria to pediatric subjects, and particularly preterm infants, with impaired intestinal defenses and immature gut barrier function may not be feasible due to the risk of bacteremia. Therefore, there is a need for compositions that can provide the benefits of probiotics without introducing viable bacteria into the intestinal tract of pediatric subjects
While not wishing to be bound by theory, it is believed that a culture supernatant from batch cultivation of a probiotic, and in particular embodiments, LGG, provides beneficial gastrointestinal benefits. It is further believed that the beneficial effects on gut barrier function can be attributed to the mixture of components (including proteinaceous materials, and possibly including (exo)polysaccharide materials) that are released into the culture medium at a late stage of the exponential (or “log”) phase of batch cultivation of LGG. The composition will be hereinafter referred to as “culture supernatant.”
Accordingly, in some embodiments, the nutritional composition includes a culture supernatant from a late-exponential growth phase of a probiotic batch-cultivation process. Without wishing to be bound by theory, it is believed that the activity of the culture supernatant can be attributed to the mixture of components (including proteinaceous materials, and possibly including (exo)polysaccharide materials) as found released into the culture medium at a late stage of the exponential (or “log”) phase of batch cultivation of the probiotic. The term “culture supernatant” as used herein, includes the mixture of components found in the culture medium. The stages recognized in batch cultivation of bacteria are known to the skilled person. These are the “lag,” the “log” (“logarithmic” or “exponential”), the “stationary” and the “death” (or “logarithmic decline”) phases. In all phases during which live bacteria are present, the bacteria metabolize nutrients from the media, and secrete (exert, release) materials into the culture medium. The composition of the secreted material at a given point in time of the growth stages is not generally predictable.
In an embodiment, a culture supernatant is obtainable by a process comprising the steps of (a) subjecting a probiotic such as LGG to cultivation in a suitable culture medium using a batch process; (b) harvesting the culture supernatant at a late exponential growth phase of the cultivation step, which phase is defined with reference to the second half of the time between the lag phase and the stationary phase of the batch-cultivation process; (c) optionally removing low molecular weight constituents from the supernatant so as to retain molecular weight constituents above 5-6 kiloDaltons (kDa); (d) removing liquid contents from the culture supernatant so as to obtain the composition.
The culture supernatant may comprise secreted materials that are harvested from a late exponential phase. The late exponential phase occurs in time after the mid exponential phase (which is halftime of the duration of the exponential phase, hence the reference to the late exponential phase as being the second half of the time between the lag phase and the stationary phase). In particular, the term “late exponential phase” is used herein with reference to the latter quarter portion of the time between the lag phase and the stationary phase of the LGG batch-cultivation process. In some embodiments, the culture supernatant is harvested at a point in time of 75% to 85% of the duration of the exponential phase, and may be harvested at about ⅚ of the time elapsed in the exponential phase.
The culture supernatant is believed to contain a mixture of amino acids, oligo- and polypeptides, and proteins, of various molecular weights. The composition is further believed to contain polysaccharide structures and/or nucleotides.
In some embodiments, the culture supernatant of the present disclosure excludes low molecular weight components, generally below 6 kDa, or even below 5 kDa. In these and other embodiments, the culture supernatant does not include lactic acid and/or lactate salts. These lower molecular weight components can be removed, for example, by filtration or column chromatography.
The culture supernatant of the present disclosure can be formulated in various ways for administration to pediatric subjects. For example, the culture supernatant can be used as such, e.g. incorporated into capsules for oral administration, or in a liquid nutritional composition such as a drink, or it can be processed before further use. Such processing generally involves separating the compounds from the generally liquid continuous phase of the supernatant. This preferably is done by a drying method, such as spray-drying or freeze-drying (lyophilization). Spray-drying is preferred. In a preferred embodiment of the spray-drying method, a carrier material will be added before spray-drying, e.g., maltodextrin DE29.
The LGG culture supernatant of the present disclosure, whether added in a separate dosage form or via a nutritional product, will generally be administered in an amount effective in promoting gut regeneration, promoting gut maturation and/or protecting gut barrier function. The effective amount is preferably equivalent to 1×104 to about 1×1012 cell equivalents of live probiotic bacteria per kg body weight per day, and more preferably 108-109 cell equivalents per kg body weight per day. In other embodiments, the amount of cell equivalents may vary from about 1×104 to about 1.5×10113 cell equivalents of probiotic(s) per 100 Kcal. In some embodiments the amount of probiotic cell equivalents may be from about 1×106 to about 1×109 cell equivalents of probiotic(s) per 100 Kcal nutritional composition. In certain other embodiments the amount of probiotic cell equivalents may vary from about 1×107 to about 1×108 cell equivalents of probiotic(s) per 100 Kcal of nutritional composition.
Without being bound by any theory, the unique combination of nutrients in the disclosed nutritional composition(s) is believed to be capable of providing novel and unexpected benefits for infants and children. Moreover, the benefit of this nutritional composition is believed to be obtained during infancy, and also by including it as part of a diverse diet as the child continues to grow and develop.
In some embodiments, a soluble mediator preparation is prepared from the culture supernatant as described below. Furthermore, preparation of an LGG soluble mediator preparation is described in US 2013/0251829 and US 2011/0217402, each of which is incorporated by reference in its entirety.
In certain embodiments, the soluble mediator preparation is obtainable by a process comprising the steps of (a) subjecting a probiotic such as LGG to cultivation in a suitable culture medium using a batch process; (b) harvesting a culture supernatant at a late exponential growth phase of the cultivation step, which phase is defined with reference to the second half of the time between the lag phase and the stationary phase of the batch-cultivation process; (c) optionally removing low molecular weight constituents from the supernatant so as to retain molecular weight constituents above 5-6 kiloDaltons (kDa); (d) removal of any remaining cells using 0.22 μm sterile filtration to provide the soluble mediator preparation; (e) removing liquid contents from the soluble mediator preparation so as to obtain the composition.
In certain embodiments, secreted materials are harvested from a late exponential phase. The late exponential phase occurs in time after the mid exponential phase (which is halftime of the duration of the exponential phase, hence the reference to the late exponential phase as being the second half of the time between the lag phase and the stationary phase). In particular, the term “late exponential phase” is used herein with reference to the latter quarter portion of the time between the lag phase and the stationary phase of the LGG batch-cultivation process. In a preferred embodiment of the present disclosure and embodiments thereof, harvesting of the culture supernatant is at a point in time of 75% to 85% of the duration of the exponential phase, and most preferably is at about ⅚ of the time elapsed in the exponential phase.
The term “cultivation” or “culturing” refers to the propagation of microorganisms, in this case LGG, on or in a suitable medium. Such a culture medium can be of a variety of kinds, and is particularly a liquid broth, as customary in the art. A preferred broth, e.g., is MRS broth as generally used for the cultivation of lactobacilli. MRS broth generally comprises polysorbate, acetate, magnesium and manganese, which are known to act as special growth factors for lactobacilli, as well as a rich nutrient base. A typical composition comprises (amounts in g/liter): peptone from casein 10.0; meat extract 8.0; yeast extract 4.0; D(+)-glucose 20.0; dipotassium hydrogen phosphate 2.0; Tween® 80 1.0; triammonium citrate 2.0; sodium acetate 5.0; magnesium sulphate 0.2; manganese sulphate 0.04.
In certain embodiments, the soluble mediator preparation is incorporated into an infant formula or other nutritional composition. The harvesting of secreted bacterial products brings about a problem that the culture media cannot easily be deprived of undesired components. This specifically relates to nutritional products for relatively vulnerable subjects, such as infant formula or clinical nutrition. This problem is not incurred if specific components from a culture supernatant are first isolated, purified, and then applied in a nutritional product. However, it is desired to make use of a more complete culture supernatant. This would serve to provide a soluble mediator composition better reflecting the natural action of the probiotic (e.g. LGG).
Accordingly, it is desired to ensure that the composition harvested from LGG cultivation does not contain components (as may present in the culture medium) that are not desired, or generally accepted, in such formula. With reference to polysorbate regularly present in MRS broth, media for the culturing of bacteria may include an emulsifying non-ionic surfactant, e.g. on the basis of polyethoxylated sorbitan and oleic acid (typically available as Tween® polysorbates, such as Tween® 80). Whilst these surfactants are frequently found in food products, e.g. ice cream, and are generally recognized as safe, they are not in all jurisdictions considered desirable, or even acceptable for use in nutritional products for relatively vulnerable subjects, such as infant formula or clinical nutrition.
Therefore, in some embodiments, a preferred culture medium of the disclosure is devoid of polysorbates such as Tween 80. In a preferred embodiment of the disclosure and/or embodiments thereof the culture medium may comprise an oily ingredient selected from the group consisting of oleic acid, linseed oil, olive oil, rape seed oil, sunflower oil and mixtures thereof. It will be understood that the full benefit of the oily ingredient is attained if the presence of a polysorbate surfactant is essentially or entirely avoided.
More particularly, in certain embodiments, an MRS medium is devoid of polysorbates. Also preferably medium comprises, in addition to one or more of the foregoing oils, peptone (typically 0-10 g/L, especially 0.1-10 g/L), meat extract (typically 0-8 g/L, especially 0.1-8 g/L), yeast extract (typically 4-50 g/L), D(+) glucose (typically 20-70 g/L), dipotassium hydrogen phosphate (typically 2-4 g/L), sodium acetate trihydrate (typically 4-5 g/L), triammonium citrate (typically 2-4 g/L), magnesium sulfphate heptahydrate (typically 0.2-0.4 g/L) and/or manganous sulphate tetrahydrate (typically 0.05-0.08 g/L).
The culturing is generally performed at a temperature of 20° C. to 45° C., more particularly at 35° C. to 40° C., and more particularly at 37° C. In some embodiments, the culture has a neutral pH, such as a pH of between pH 5 and pH 7, preferably pH 6.
In some embodiments, the time point during cultivation for harvesting the culture supernatant, i.e., in the aforementioned late exponential phase, can be determined, e.g. based on the OD600 nm and glucose concentration. OD600 refers to the optical density at 600 nm, which is a known density measurement that directly correlates with the bacterial concentration in the culture medium.
The culture supernatant can be harvested by any known technique for the separation of culture supernatant from a bacterial culture. Such techniques are known in the art and include, e.g., centrifugation, filtration, sedimentation, and the like. In some embodiments, LGG cells are removed from the culture supernatant using 0.22 μm sterile filtration in order to produce the soluble mediator preparation. The probiotic soluble mediator preparation thus obtained may be used immediately, or be stored for future use. In the latter case, the probiotic soluble mediator preparation will generally be refrigerated, frozen or lyophilized. The probiotic soluble mediator preparation may be concentrated or diluted, as desired.
The soluble mediator preparation is believed to contain a mixture of amino acids, oligo- and polypeptides, and proteins, of various molecular weights. The composition is further believed to contain polysaccharide structures and/or nucleotides.
In some embodiments, the soluble mediator preparation of the present disclosure excludes lower molecular weight components, generally below 6 kDa, or even below 5 kDa. In these and other embodiments, the soluble mediator preparation does not include lactic acid and/or lactate salts. These lower molecular weight components can be removed, for example, by filtration or column chromatography. In some embodiments, the culture supernatant is subjected to ultrafiltration with a 5 kDa membrane in order to retain constituents over 5 kDa. In other embodiments, the culture supernatant is desalted using column chromatography to retain constituents over 6 kDa.
The soluble mediator preparation of the present disclosure can be formulated in various ways for administration to pediatric subjects. For example, the soluble mediator preparation can be used as such, e.g. incorporated into capsules for oral administration, or in a liquid nutritional composition such as a drink, or it can be processed before further use. Such processing generally involves separating the compounds from the generally liquid continuous phase of the supernatant. This preferably is done by a drying method, such as spray-drying or freeze-drying (lyophilization). In a preferred embodiment of the spray-drying method, a carrier material will be added before spray-drying, e.g., maltodextrin DE29.
Probiotic bacteria soluble mediator preparations, such as the LGG soluble mediator preparation disclosed herein, advantageously possess gut barrier enhancing activity by promoting gut barrier regeneration, gut barrier maturation and/or adaptation, gut barrier resistance and/or gut barrier function. The present LGG soluble mediator preparation may accordingly be particularly useful in treating subjects, particularly pediatric subjects, with impaired gut barrier function, such as short bowel syndrome or NEC. The soluble mediator preparation may be particularly useful for infants and premature infants having impaired gut barrier function and/or short bowel syndrome.
Probiotic bacteria soluble mediator preparation, such as the LGG soluble mediator preparation of the present disclosure, also advantageously reduce visceral pain sensitivity in subjects, particularly pediatric subjects experiencing gastrointestinal pain, food intolerance, allergic or non-allergic inflammation, colic, IBS, and infections.
In an embodiment, the nutritional composition may include prebiotics. In certain embodiments, the nutritional composition includes prebiotics that may stimulate endogenous butyrate production. For example, in some embodiments the component for stimulating endogenous butyrate production comprises a microbiota-stimulating component that is a prebiotic including both polydextrose (“PDX”) and galacto-oligosaccharides (“GOS”). A prebiotic component including PDX and GOS can enhance butyrate production by microbiota.
In addition to PDX and GOS, the nutritional composition may also contain one or more other prebiotics which can exert additional health benefits, which may include, but are not limited to, selective stimulation of the growth and/or activity of one or a limited number of beneficial gut bacteria, stimulation of the growth and/or activity of ingested probiotic microorganisms, selective reduction in gut pathogens, and favorable influence on gut short chain fatty acid profile. Such prebiotics may be naturally-occurring, synthetic, or developed through the genetic manipulation of organisms and/or plants, whether such new source is now known or developed later. Prebiotics useful in the present disclosure may include oligosaccharides, polysaccharides, and other prebiotics that contain fructose, xylose, soya, galactose, glucose and mannose.
More specifically, prebiotics useful in the present disclosure include PDX and GOS, and can, in some embodiments, also include, PDX powder, lactulose, lactosucrose, raffinose, gluco-oligosaccharide, inulin, fructo-oligosaccharide (FOS), isomalto-oligosaccharide, soybean oligosaccharides, lactosucrose, xylo-oligosaccharide (XOS), chito-oligosaccharide, manno-oligosaccharide, aribino-oligosaccharide, siallyl-oligosaccharide, fuco-oligosaccharide, and gentio-oligosaccharides.
In an embodiment, the total amount of prebiotics present in the nutritional composition may be from about 1.0 g/L to about 10.0 g/L of the composition. More preferably, the total amount of prebiotics present in the nutritional composition may be from about 2.0 g/L and about 8.0 g/L of the composition. In some embodiments, the total amount of prebiotics present in the nutritional composition may be from about 0.01 g/100 Kcal to about 1.5 g/100 Kcal. In certain embodiments, the total amount of prebiotics present in the nutritional composition may be from about 0.15 g/100 Kcal to about 1.5 g/100 Kcal. In some embodiments, the prebiotic component comprises at least 20% w/w PDX and GOS.
The amount of PDX in the nutritional composition may, in an embodiment, be within the range of from about 0.015 g/100 Kcal to about 1.5 g/100 Kcal. In another embodiment, the amount of polydextrose is within the range of from about 0.2 g/100 Kcal to about 0.6 g/100 Kcal. In some embodiments, PDX may be included in the nutritional composition in an amount sufficient to provide between about 1.0 g/L and 10.0 g/L. In another embodiment, the nutritional composition contains an amount of PDX that is between about 2.0 g/L and 8.0 g/L. And in still other embodiments, the amount of PDX in the nutritional composition may be from about 0.05 g/100 Kcal to about 1.5 g/100 Kcal.
The prebiotic component also comprises GOS. The amount of GOS in the nutritional composition may, in an embodiment, be from about 0.015 g/100 Kcal to about 1.0 g/100 Kcal. In another embodiment, the amount of GOS in the nutritional composition may be from about 0.2 g/100 Kcal to about 0.5 g/100 Kcal.
In a particular embodiment, GOS and PDX are supplemented into the nutritional composition in a total amount of at least about 0.015 g/100 Kcal or about 0.015 g/100 Kcal to about 1.5 g/100 Kcal. In some embodiments, the nutritional composition may comprise GOS and PDX in a total amount of from about 0.1 to about 1.0 g/100 Kcal.
In some embodiments, the nutritional composition includes a protein equivalent source, wherein the protein equivalent source includes a peptide component comprising SEQ ID NO 4, SEQ ID NO 13, SEQ ID NO 17, SEQ ID NO 21, SEQ ID NO 24, SEQ ID NO 30, SEQ ID NO 31, SEQ ID NO 32, SEQ ID NO 51, SEQ ID NO 57, SEQ ID NO 60, and SEQ ID NO 63. In some embodiments, the peptide component may comprise additional peptides disclosed in Table 2. For example, the composition may include at least 10 additional peptides disclosed in Table 2. In some embodiments, 20% to 80% of the protein equivalent source comprises the peptide component, and 20% to 80% of the protein equivalent source comprises an intact protein, a partially hydrolyzed protein, and combinations thereof. In some embodiments, the term additional means selecting different peptides than those enumerated.
In another embodiment, 1% to about 99% of the protein equivalent source includes a peptide component comprising at least 3 peptides selected from the group consisting of SEQ ID NO 4, SEQ ID NO 13, SEQ ID NO 17, SEQ ID NO 21, SEQ ID NO 24, SEQ ID NO 30, SEQ ID NO 31, SEQ ID NO 32, SEQ ID NO 51, SEQ ID NO 57, SEQ ID NO 60, and SEQ ID NO 63, and at least 5 additional peptides selected from Table 2; and wherein 1% to 99% of the protein equivalent source comprises an intact protein, a partially hydrolyzed protein, or combinations thereof. In some embodiments, 20% to 80% of the protein equivalent source includes a peptide component comprising at least 3 peptides selected from the group consisting of SEQ ID NO 4, SEQ ID NO 13, SEQ ID NO 17, SEQ ID NO 21, SEQ ID NO 24, SEQ ID NO 30, SEQ ID NO 31, SEQ ID NO 32, SEQ ID NO 51, SEQ ID NO 57, SEQ ID NO 60, and SEQ ID NO 63, and at least 5 additional peptides selected from Table 2; and wherein 20% to 80% of the protein equivalent source comprises an intact protein, a partially hydrolyzed protein, or combinations thereof.
Table 2 below identifies the amino acid sequences of the peptides that may be included in the peptide component of the present nutritional compositions.
Table 3 below further identifies a subset of amino acid sequences from Table 2 that may be included in the peptide component disclosed herein.
In some embodiments, the peptide component may be present in the nutritional composition in an amount from about 0.2 g/100 Kcal to about 5.6 g/100 Kcal. In other embodiments the peptide component may be present in the nutritional composition in an amount from about 1 g/100 Kcal to about 4 g/100 Kcal. In still other embodiments, the peptide component may be present in the nutritional composition in an amount from about 2 g/100 Kcal to about 3 g/100 Kcal.
The peptide component disclosed herein may be formulated with other ingredients in the nutritional composition to provide appropriate nutrient levels for the target subject. In some embodiments, the peptide component is included in a nutritionally complete formula that is suitable to support normal growth.
The peptide component may be provided as an element of a protein equivalent source. In some embodiments, the peptides identified in Tables 3 and 4, may be provided by a protein equivalent source obtained from cow's milk proteins, including but not limited to bovine casein and bovine whey. In some embodiments, the protein equivalent source comprises hydrolyzed bovine casein or hydrolyzed bovine whey. Accordingly, in some embodiments, the peptides identified in Table 2 and Table 3 may be provided by a casein hydrolysate. Such peptides may be obtained by hydrolysis or may be synthesized in vitro by methods know to the skilled person.
A non-limiting example of a method of hydrolysis is disclosed herein. In some embodiments, this method may be used to obtain the protein hydrolysate and peptides of the present disclosure. The proteins are hydrolyzed using a proteolytic enzyme, Protease N. Protease N “Amano” is commercially available from Amano Enzyme U.S.A. Co., Ltd., Elgin, Ill. Protease N is a proteolytic enzyme preparation that is derived from the bacterial species Bacillus subtilis. The protease powder is specified as “not less than 150,000 units/g”, meaning that one unit of Protease N is the amount of enzyme which produces an amino acid equivalent to 100 micrograms of tyrosine for 60 minutes at a pH of 7.0. To produce the infant formula of the present disclosure, Protease N can be used at levels of about 0.5% to about 1.0% by weight of the total protein being hydrolyzed.
The protein hydrolysis by Protease N is typically conducted at a temperature of about 50° C. to about 60° C. The hydrolysis occurs for a period of time so as to obtain a degree of hydrolysis between about 4% and 10%. In a particular embodiment, hydrolysis occurs for a period of time so as to obtain a degree of hydrolysis between about 6% and 9%. In another embodiment, hydrolysis occurs for a period of time so as to obtain a degree of hydrolysis of about 7.5%. This level of hydrolysis may take between about one half hour to about 3 hours.
A constant pH should be maintained during hydrolysis. In the method of the present disclosure, the pH is adjusted to and maintained between about 6.5 and 8. In a particular embodiment, the pH is maintained at about 7.0.
In order to maintain the optimal pH of the solution of whey protein, casein, water and Protease N, a caustic solution of sodium hydroxide and/or potassium hydroxide can be used to adjust the pH during hydrolysis. If sodium hydroxide is used to adjust the pH, the amount of sodium hydroxide added to the solution should be controlled to the level that it comprises less than about 0.3% of the total solid in the finished protein hydrolysate. A 10% potassium hydroxide solution can also be used to adjust the pH of the solution to the desired value, either before the enzyme is added or during the hydrolysis process in order to maintain the optimal pH.
The amount of caustic solution added to the solution during the protein hydrolysis can be controlled by a pH-stat or by adding the caustic solution continuously and proportionally. The hydrolysate can be manufactured by standard batch processes or by continuous processes.
To better ensure the consistent quality of the protein partial hydrolysate, the hydrolysate is subjected to enzyme deactivation to end the hydrolysis process. The enzyme deactivation step may consist include at heat treatment at a temperature of about 82° C. for about 10 minutes. Alternatively, the enzyme can be deactivated by heating the solution to a temperature of about 92° C. for about 5 seconds. After enzyme deactivation is complete, the hydrolysate can be stored in a liquid state at a temperature lower than 10° C.
In some embodiments, the protein equivalent source comprises a hydrolyzed protein, which includes partially hydrolyzed protein and extensively hydrolyzed protein, such as casein. In some embodiments, the protein equivalent source comprises a hydrolyzed protein including peptides having a molar mass distribution of greater than 500 Daltons. In some embodiments, the hydrolyzed protein comprises peptides having a molar mass distribution in the range of from about 500 Daltons to about 1,500 Daltons. Still, in some embodiments the hydrolyzed protein may comprise peptides having a molar mass distribution range of from about 500 Daltons to about 2,000 Daltons.
In some embodiments, the protein equivalent source may comprise the peptide component, intact protein, hydrolyzed protein, including partially hydrolyzed protein and/or extensively hydrolyzed protein, and combinations thereof. In some embodiments, 1% to 99% of the protein equivalent source comprises the peptide component disclosed herein. In some embodiments, 10% to 90% of the protein equivalent source comprises the peptide component disclosed herein. In some embodiments, 20% to 80% of the protein equivalent source comprises the peptide component disclosed herein. In some embodiments, 30% to 60% of the protein equivalent source comprises the peptide component disclosed herein. In still other embodiments, 40% to 50% of the protein equivalent source comprises the peptide component.
In some embodiments, 1% to 99% of the protein equivalent source comprises intact protein, partially hydrolyzed protein, extensively hydrolyzed protein, or combinations thereof. In some embodiments, 10% to 90% of the protein equivalent source comprises intact protein, partially hydrolyzed protein, extensively hydrolyzed protein, or combinations thereof. In some embodiments, 20% to 80% of the protein equivalent source comprises intact protein, partially hydrolyzed protein, extensively hydrolyzed protein, or combinations thereof. In some embodiments, 40% to 70% of the protein equivalent source comprises intact proteins, partially hydrolyzed proteins, extensively hydrolyzed protein, or a combination thereof. In still further embodiments, 50% to 60% of the protein equivalent source may comprise intact proteins, partially hydrolyzed protein, extensively hydrolyzed protein, or a combination thereof.
In some embodiments the protein equivalent source comprises partially hydrolyzed protein having a degree of hydrolysis of less than 40%. In still other embodiments, the protein equivalent source may comprise partially hydrolyzed protein having a degree of hydrolysis of less than 25%, or less than 15%.
In some embodiments, the nutritional composition comprises between about 1 g and about 7 g of a protein equivalent source per 100 Kcal. In other embodiments, the nutritional composition comprises between about 3.5 g and about 4.5 g of protein equivalent source per 100 Kcal.
The nutritional composition(s) of the disclosure may also comprise a protein source. The protein source can be any used in the art, e.g., nonfat milk, whey protein, casein, soy protein, hydrolyzed protein, amino acids, and the like. Bovine milk protein sources useful in practicing the present disclosure include, but are not limited to, milk protein powders, milk protein concentrates, milk protein isolates, nonfat milk solids, nonfat milk, nonfat dry milk, whey protein, whey protein isolates, whey protein concentrates, sweet whey, acid whey, casein, acid casein, caseinate (e.g. sodium caseinate, sodium calcium caseinate, calcium caseinate) and any combinations thereof.
In one embodiment, the proteins of the nutritional composition are provided as intact proteins. In other embodiments, the proteins are provided as a combination of both intact proteins and partially hydrolyzed proteins, with a degree of hydrolysis of between about 4% and 10%. In certain other embodiments, the proteins are more completely hydrolyzed. In still other embodiments, the protein source comprises amino acids. In yet another embodiment, the protein source may be supplemented with glutamine-containing peptides.
In a particular embodiment of the nutritional composition, the whey:casein ratio of the protein source is similar to that found in human breast milk. In an embodiment, the protein source comprises from about 40% to about 80% whey protein and from about 20% to about 60% casein.
In some embodiments the protein source may include a combination of milk powders and whey protein powders. In some embodiments, the protein source comprise from about 5 wt % to about 30% of nonfat milk powder based on the total weight of the nutritional composition and about 2 wt % to about 20 wt % of whey protein concentrate based on the total weight of the nutritional composition. Still in certain embodiments, the protein source comprise from about 10 wt % to about 20% of nonfat milk powder based on the total weight of the nutritional composition and about 5 wt % to about 15 wt % of whey protein concentrate based on the total weight of the nutritional composition.
In some embodiments, the nutritional composition comprises between about 1 g and about 7 g of a protein source per 100 Kcal. In other embodiments, the nutritional composition comprises between about 3.5 g and about 4.5 g of protein per 100 Kcal.
The nutritional composition(s) of the present disclosure may also comprise a carbohydrate source. Carbohydrate sources can be any used in the art, e.g., lactose, glucose, fructose, corn syrup solids, maltodextrins, sucrose, starch, rice syrup solids, and the like. The amount of carbohydrate in the nutritional composition typically can vary from between about 5 g and about 25 g/100 Kcal. In some embodiments, the amount of carbohydrate is between about 6 g and about 22 g/100 Kcal. In other embodiments, the amount of carbohydrate is between about 12 g and about 14 g/100 Kcal. In some embodiments, corn syrup solids are preferred. Moreover, hydrolyzed, partially hydrolyzed, and/or extensively hydrolyzed carbohydrates may be desirable for inclusion in the nutritional composition due to their easy digestibility. Specifically, hydrolyzed carbohydrates are less likely to contain allergenic epitopes.
Non-limiting examples of carbohydrate materials suitable for use herein include hydrolyzed or intact, naturally or chemically modified, starches sourced from corn, tapioca, rice or potato, in waxy or non-waxy forms. Non-limiting examples of suitable carbohydrates include various hydrolyzed starches characterized as hydrolyzed cornstarch, maltodextrin, maltose, corn syrup, dextrose, corn syrup solids, glucose, and various other glucose polymers and combinations thereof. Non-limiting examples of other suitable carbohydrates include those often referred to as sucrose, lactose, fructose, high fructose corn syrup, indigestible oligosaccharides such as fructooligosaccharides and combinations thereof.
In some embodiments, the nutritional composition described herein comprises a fat source. The enriched lipid fraction described herein may be the sole fat source or may be used in combination with any other suitable fat or lipid source for the nutritional composition as known in the art. In certain embodiments, appropriate fat sources include, but are not limited to, animal sources, e.g., milk fat, butter, butter fat, egg yolk lipid; marine sources, such as fish oils, marine oils, single cell oils; vegetable and plant oils, such as corn oil, canola oil, sunflower oil, soybean oil, palm olein oil, coconut oil, high oleic sunflower oil, evening primrose oil, rapeseed oil, olive oil, flaxseed (linseed) oil, cottonseed oil, high oleic safflower oil, palm stearin, palm kernel oil, wheat germ oil; medium chain triglyceride oils and emulsions and esters of fatty acids; and any combinations thereof.
In some embodiment the nutritional composition comprises between about 1 g/100 Kcal to about 10 g/100 Kcal of a fat or lipid source. In some embodiments, the nutritional composition comprises between about 2 g/100 Kcal to about 7 g/100 Kcal of a fat source. In other embodiments the fat source may be present in an amount from about 2.5 g/100 Kcal to about 6 g/100 Kcal. In still other embodiments, the fat source may be present in the nutritional composition in an amount from about 3 g/100 Kcal to about 4 g/100 Kcal.
In some embodiments, the fat or lipid source comprises from about 10% to about 35% palm oil per the total amount of fat or lipid. In some embodiments, the fat or lipid source comprises from about 15% to about 30% palm oil per the total amount of fat or lipid. Yet in other embodiments, the fat or lipid source may comprise from about 18% to about 25% palm oil per the total amount of fat or lipid.
In certain embodiments, the fat or lipid source may be formulated to include from about 2% to about 16% soybean oil based on the total amount of fat or lipid. In some embodiments, the fat or lipid source may be formulated to include from about 4% to about 12% soybean oil based on the total amount of fat or lipid. In some embodiments, the fat or lipid source may be formulated to include from about 6% to about 10% soybean oil based on the total amount of fat or lipid.
In certain embodiments, the fat or lipid source may be formulated to include from about 2% to about 16% coconut oil based on the total amount of fat or lipid. In some embodiments, the fat or lipid source may be formulated to include from about 4% to about 12% coconut oil based on the total amount of fat or lipid. In some embodiments, the fat or lipid source may be formulated to include from about 6% to about 10% coconut oil based on the total amount of fat or lipid.
In certain embodiments, the fat or lipid source may be formulated to include from about 2% to about 16% sunflower oil based on the total amount of fat or lipid. In some embodiments, the fat or lipid source may be formulated to include from about 4% to about 12% sunflower oil based on the total amount of fat or lipid. In some embodiments, the fat or lipid source may be formulated to include from about 6% to about 10% sunflower oil based on the total amount of fat or lipid.
In some embodiments, the oils, i.e. sunflower oil, soybean oil, sunflower oil, palm oil, etc. are meant to cover fortified versions of such oils known in the art. For example, in certain embodiments, the use of sunflower oil may include high oleic sunflower oil. In other examples, the use of such oils may be fortified with certain fatty acids, as known in the art, and may be used in the fat or lipid source disclosed herein.
In some embodiments the nutritional composition may also include a source of long chain polyunsaturated fatty acids (LCPUFAs). In one embodiment the amount of LCPUFA in the nutritional composition is advantageously at least about 5 mg/100 Kcal, and may vary from about 5 mg/100 Kcal to about 100 mg/100 Kcal, more preferably from about 10 mg/100 Kcal to about 50 mg/100 Kcal. Non-limiting examples of LCPUFAs include, but are not limited to, DHA, ARA, linoleic (18:2 n-6), γ-linolenic (18:3 n-6), dihomo-γ-linolenic (20:3 n-6) acids in the n-6 pathway, a-linolenic (18:3 n-3), stearidonic (18:4 n-3), eicosatetraenoic (20:4 n-3), eicosapentaenoic (20:5 n-3), and docosapentaenoic (22:6 n-3).
In some embodiments, the LCPUFA included in the nutritional composition may comprise DHA. In one embodiment the amount of DHA in the nutritional composition is advantageously at least about 17 mg/100 Kcal, and may vary from about 5 mg/100 Kcal to about 75 mg/100 Kcal, more preferably from about 10 mg/100 Kcal to about 50 mg/100 Kcal.
In another embodiment, especially if the nutritional composition is an infant formula, the nutritional composition is supplemented with both DHA and ARA. In this embodiment, the weight ratio of ARA:DHA may be between about 1:3 and about 9:1. In a particular embodiment, the ratio of ARA:DHA is from about 1:2 to about 4:1.
The DHA and ARA can be in natural form, provided that the remainder of the LCPUFA source does not result in any substantial deleterious effect on the infant. Alternatively, the DHA and ARA can be used in refined form.
The disclosed nutritional composition described herein can, in some embodiments, also comprise a source of ß-glucan. Glucans are polysaccharides, specifically polymers of glucose, which are naturally occurring and may be found in cell walls of bacteria, yeast, fungi, and plants. Beta glucans (β-glucans) are themselves a diverse subset of glucose polymers, which are made up of chains of glucose monomers linked together via beta-type glycosidic bonds to form complex carbohydrates.
β-1,3-glucans are carbohydrate polymers purified from, for example, yeast, mushroom, bacteria, algae, or cereals. The chemical structure of β-1,3-glucan depends on the source of the β-1,3-glucan. Moreover, various physiochemical parameters, such as solubility, primary structure, molecular weight, and branching, play a role in biological activities of β-1,3-glucans.
β-1,3-glucans are naturally occurring polysaccharides, with or without β-1,6-glucose side chains that are found in the cell walls of a variety of plants, yeasts, fungi and bacteria. β-1,3;1,6-glucans are those containing glucose units with (1,3) links having side chains attached at the (1,6) position(s). β-1,3;1,6 glucans are a heterogeneous group of glucose polymers that share structural commonalities, including a backbone of straight chain glucose units linked by a β-1,3 bond with β-1,6-linked glucose branches extending from this backbone. While this is the basic structure for the presently described class of β-glucans, some variations may exist. For example, certain yeast β-glucans have additional regions of β(1,3) branching extending from the β(1,6) branches, which add further complexity to their respective structures.
β-glucans derived from baker's yeast, Saccharomyces cerevisiae, are made up of chains of D-glucose molecules connected at the 1 and 3 positions, having side chains of glucose attached at the 1 and 6 positions. Yeast-derived β-glucan is an insoluble, fiber-like, complex sugar having the general structure of a linear chain of glucose units with a β-1,3 backbone interspersed with β-1,6 side chains that are generally 6-8 glucose units in length. More specifically, β-glucan derived from baker's yeast is poly-(1,6)-β-D-glucopyranosyl-(1,3)-β-D-glucopyranose.
Furthermore, β-glucans are well tolerated and do not produce or cause excess gas, abdominal distension, bloating or diarrhea in pediatric subjects. Addition of β-glucan to a nutritional composition for a pediatric subject, such as an infant formula, a growing-up milk or another children's nutritional product, will improve the subject's immune response by increasing resistance against invading pathogens and therefore maintaining or improving overall health.
In some embodiments, the β-glucan is β-1,3;1,6-glucan. In some embodiments, the β-1,3;1,6-glucan is derived from baker's yeast. The nutritional composition may comprise whole glucan particle β-glucan, particulate β-glucan, PGG-glucan (poly-1,6-β-D-glucopyranosyl-1,3-β-D-glucopyranose) or any mixture thereof.
In some embodiments, the amount of β-glucan in the nutritional composition is between about 3 mg and about 17 mg per 100 Kcal. In another embodiment the amount of β-glucan is between about 6 mg and about 17 mg per 100 Kcal.
The nutritional composition of the present disclosure may comprise lactoferrin in some embodiments. Lactoferrins are single chain polypeptides of about 80 kD containing 1-4 glycans, depending on the species. The 3-D structures of lactoferrin of different species are very similar, but not identical. Each lactoferrin comprises two homologous lobes, called the N- and C-lobes, referring to the N-terminal and C-terminal part of the molecule, respectively. Each lobe further consists of two sub-lobes or domains, which form a cleft where the ferric ion (Fe3+) is tightly bound in synergistic cooperation with a (bi)carbonate anion. These domains are called N1, N2, C1 and C2, respectively. The N-terminus of lactoferrin has strong cationic peptide regions that are responsible for a number of important binding characteristics. Lactoferrin has a very high isoelectric point (˜pl 9) and its cationic nature plays a major role in its ability to defend against bacterial, viral, and fungal pathogens. There are several clusters of cationic amino acids residues within the N-terminal region of lactoferrin mediating the biological activities of lactoferrin against a wide range of microorganisms.
Lactoferrin for use in the present disclosure may be, for example, isolated from the milk of a non-human animal or produced by a genetically modified organism. The oral electrolyte solutions described herein can, in some embodiments comprise non-human lactoferrin, non-human lactoferrin produced by a genetically modified organism and/or human lactoferrin produced by a genetically modified organism.
Suitable non-human lactoferrins for use in the present disclosure include, but are not limited to, those having at least 48% homology with the amino acid sequence of human lactoferrin. For instance, bovine lactoferrin (bLF) has an amino acid composition which has about 70% sequence homology to that of human lactoferrin. In some embodiments, the non-human lactoferrin has at least 65% homology with human lactoferrin and in some embodiments, at least 75% homology. Non-human lactoferrins acceptable for use in the present disclosure include, without limitation, bLF, porcine lactoferrin, equine lactoferrin, buffalo lactoferrin, goat lactoferrin, murine lactoferrin and camel lactoferrin.
In some embodiments, the nutritional composition of the present disclosure comprises non-human lactoferrin, for example bLF. bLF is a glycoprotein that belongs to the iron transporter or transferring family. It is isolated from bovine milk, wherein it is found as a component of whey. There are known differences between the amino acid sequence, glycosylation patters and iron-binding capacity in human lactoferrin and bLF. Additionally, there are multiple and sequential processing steps involved in the isolation of bLF from cow's milk that affect the physiochemical properties of the resulting bLF preparation. Human lactoferrin and bLF are also reported to have differences in their abilities to bind the lactoferrin receptor found in the human intestine.
Though not wishing to be bound by this or any other theory, it is believe that bLF that has been isolated from whole milk has less lipopolysaccharide (LPS) initially bound than does bLF that has been isolated from milk powder. Additionally, it is believed that bLF with a low somatic cell count has less initially-bound LPS. A bLF with less initially-bound LPS has more binding sites available on its surface. This is thought to aid bLF in binding to the appropriate location and disrupting the infection process.
bLF suitable for the present disclosure may be produced by any method known in the art. For example, in U.S. Pat. No. 4,791,193, incorporated by reference herein in its entirety, Okonogi et al. discloses a process for producing bovine lactoferrin in high purity. Generally, the process as disclosed includes three steps. Raw milk material is first contacted with a weakly acidic cationic exchanger to absorb lactoferrin followed by the second step where washing takes place to remove nonabsorbed substances. A desorbing step follows where lactoferrin is removed to produce purified bovine lactoferrin. Other methods may include steps as described in U.S. Pat. Nos. 7,368,141, 5,849,885, 5,919,913 and 5,861,491, the disclosures of which are all incorporated by reference in their entirety.
In certain embodiments, lactoferrin utilized in the present disclosure may be provided by an expanded bed absorption (EBA) process for isolating proteins from milk sources. EBA, also sometimes called stabilized fluid bed adsorption, is a process for isolating a milk protein, such as lactoferrin, from a milk source comprises establishing an expanded bed adsorption column comprising a particulate matrix, applying a milk source to the matrix, and eluting the lactoferrin from the matrix with an elution buffer comprising about 0.3 to about 2.0 M sodium chloride. Any mammalian milk source may be used in the present processes, although in particular embodiments, the milk source is a bovine milk source. The milk source comprises, in some embodiments, whole milk, reduced fat milk, skim milk, whey, casein, or mixtures thereof.
In particular embodiments, the target protein is lactoferrin, though other milk proteins, such as lactoperoxidases or lactalbumins, also may be isolated. In some embodiments, the process comprises the steps of establishing an expanded bed adsorption column comprising a particulate matrix, applying a milk source to the matrix, and eluting the lactoferrin from the matrix with about 0.3 to about 2.0M sodium chloride. In other embodiments, the lactoferrin is eluted with about 0.5 to about 1.0 M sodium chloride, while in further embodiments, the lactoferrin is eluted with about 0.7 to about 0.9 M sodium chloride.
The expanded bed adsorption column can be any known in the art, such as those described in U.S. Pat. Nos. 7,812,138, 6,620,326, and 6,977,046, the disclosures of which are hereby incorporated by reference herein. In some embodiments, a milk source is applied to the column in an expanded mode, and the elution is performed in either expanded or packed mode. In particular embodiments, the elution is performed in an expanded mode. For example, the expansion ratio in the expanded mode may be about 1 to about 3, or about 1.3 to about 1.7. EBA technology is further described in international published application nos. WO 92/00799, WO 02/18237, WO 97/17132, which are hereby incorporated by reference in their entireties.
The isoelectric point of lactoferrin is approximately 8.9. Prior EBA methods of isolating lactoferrin use 200 mM sodium hydroxide as an elution buffer. Thus, the pH of the system rises to over 12, and the structure and bioactivity of lactoferrin may be comprised, by irreversible structural changes. It has now been discovered that a sodium chloride solution can be used as an elution buffer in the isolation of lactoferrin from the EBA matrix. In certain embodiments, the sodium chloride has a concentration of about 0.3 M to about 2.0 M. In other embodiments, the lactoferrin elution buffer has a sodium chloride concentration of about 0.3 M to about 1.5 M, or about 0.5 m to about 1.0 M.
In other embodiments, lactoferrin for use in the composition of the present disclosure can be isolated through the use of radial chromatography or charged membranes, as would be familiar to the skilled artisan.
The lactoferrin that is used in certain embodiments may be any lactoferrin isolated from whole milk and/or having a low somatic cell count, wherein “low somatic cell count” refers to a somatic cell count less than 200,000 cells/mL. By way of example, suitable lactoferrin is available from Tatua Co-operative Dairy Co. Ltd., in Morrinsville, New Zealand, from FrieslandCampina Domo in Amersfoort, Netherlands or from Fonterra Co-Operative Group Limited in Auckland, New Zealand.
Surprisingly, lactoferrin included herein maintains certain bactericidal activity even if exposed to a low pH (i.e., below about 7, and even as low as about 4.6 or lower) and/or high temperatures (i.e., above about 65° C., and as high as about 120° C.), conditions which would be expected to destroy or severely limit the stability or activity of human lactoferrin. These low pH and/or high temperature conditions can be expected during certain processing regimen for nutritional compositions of the types described herein, such as pasteurization. Therefore, even after processing regimens, lactoferrin has bactericidal activity against undesirable bacterial pathogens found in the human gut. The nutritional composition may, in some embodiments, comprise lactoferrin in an amount from about 25 mg/100 mL to about 150 mg/100 mL. In other embodiments lactoferrin is present in an amount from about 60 mg/100 mL to about 120 mg/100 mL. In still other embodiments lactoferrin is present in an amount from about 85 mg/100 mL to about 110 mg/100 mL.
The disclosed nutritional composition described herein, can, in some embodiments also comprise an effective amount of iron. The iron may comprise encapsulated iron forms, such as encapsulated ferrous fumarate or encapsulated ferrous sulfate or less reactive iron forms, such as ferric pyrophosphate or ferric orthophosphate.
One or more vitamins and/or minerals may also be added in to the nutritional composition in amounts sufficient to supply the daily nutritional requirements of a subject. It is to be understood by one of ordinary skill in the art that vitamin and mineral requirements will vary, for example, based on the age of the child. For instance, an infant may have different vitamin and mineral requirements than a child between the ages of one and thirteen years. Thus, the embodiments are not intended to limit the nutritional composition to a particular age group but, rather, to provide a range of acceptable vitamin and mineral components.
In embodiments providing a nutritional composition for a child, the composition may optionally include, but is not limited to, one or more of the following vitamins or derivations thereof: vitamin B1 (thiamin, thiamin pyrophosphate, TPP, thiamin triphosphate, TTP, thiamin hydrochloride, thiamin mononitrate), vitamin B2 (riboflavin, flavin mononucleotide, FMN, flavin adenine dinucleotide, FAD, lactoflavin, ovoflavin), vitamin B3 (niacin, nicotinic acid, nicotinamide, niacinamide, nicotinamide adenine dinucleotide, NAD, nicotinic acid mononucleotide, NicMN, pyridine-3-carboxylic acid), vitamin B3-precursor tryptophan, vitamin B6 (pyridoxine, pyridoxal, pyridoxamine, pyridoxine hydrochloride), pantothenic acid (pantothenate, panthenol), folate (folic acid, folacin, pteroylglutamic acid), vitamin B12 (cobalamin, methylcobalamin, deoxyadenosylcobalamin, cyanocobalamin, hydroxycobalamin, adenosylcobalamin), biotin, vitamin C (ascorbic acid), vitamin A (retinol, retinyl acetate, retinyl palmitate, retinyl esters with other long-chain fatty acids, retinal, retinoic acid, retinol esters), vitamin D (calciferol, cholecalciferol, vitamin D3, 1,25,-dihydroxyvitamin D), vitamin E (a-tocopherol, a-tocopherol acetate, a-tocopherol succinate, a-tocopherol nicotinate, a-tocopherol), vitamin K (vitamin K1, phylloquinone, naphthoquinone, vitamin K2, menaquinone-7, vitamin K3, menaquinone-4, menadione, menaquinone-8, menaquinone-8H, menaquinone-9, menaquinone-9H, menaquinone-10, menaquinone-11, menaquinone-12, menaquinone-13), choline, inositol, β-carotene and any combinations thereof.
In embodiments providing a children's nutritional product, such as a growing-up milk, the composition may optionally include, but is not limited to, one or more of the following minerals or derivations thereof: boron, calcium, calcium acetate, calcium gluconate, calcium chloride, calcium lactate, calcium phosphate, calcium sulfate, chloride, chromium, chromium chloride, chromium picolonate, copper, copper sulfate, copper gluconate, cupric sulfate, fluoride, iron, carbonyl iron, ferric iron, ferrous fumarate, ferric orthophosphate, iron trituration, polysaccharide iron, iodide, iodine, magnesium, magnesium carbonate, magnesium hydroxide, magnesium oxide, magnesium stearate, magnesium sulfate, manganese, molybdenum, phosphorus, potassium, potassium phosphate, potassium iodide, potassium chloride, potassium acetate, selenium, sulfur, sodium, docusate sodium, sodium chloride, sodium selenate, sodium molybdate, zinc, zinc oxide, zinc sulfate and mixtures thereof. Non-limiting exemplary derivatives of mineral compounds include salts, alkaline salts, esters and chelates of any mineral compound.
The minerals can be added to growing-up milks or to other children's nutritional compositions in the form of salts such as calcium phosphate, calcium glycerol phosphate, sodium citrate, potassium chloride, potassium phosphate, magnesium phosphate, ferrous sulfate, zinc sulfate, cupric sulfate, manganese sulfate, and sodium selenite. Additional vitamins and minerals can be added as known within the art.
The nutritional compositions of the present disclosure may optionally include one or more of the following flavoring agents, including, but not limited to, flavored extracts, volatile oils, cocoa or chocolate flavorings, peanut butter flavoring, cookie crumbs, vanilla or any commercially available flavoring. Examples of useful flavorings include, but are not limited to, pure anise extract, imitation banana extract, imitation cherry extract, chocolate extract, pure lemon extract, pure orange extract, pure peppermint extract, honey, imitation pineapple extract, imitation rum extract, imitation strawberry extract, or vanilla extract; or volatile oils, such as balm oil, bay oil, bergamot oil, cedarwood oil, cherry oil, cinnamon oil, clove oil, or peppermint oil; peanut butter, chocolate flavoring, vanilla cookie crumb, butterscotch, toffee, and mixtures thereof. The amounts of flavoring agent can vary greatly depending upon the flavoring agent used. The type and amount of flavoring agent can be selected as is known in the art.
The nutritional compositions of the present disclosure may optionally include one or more emulsifiers that may be added for stability of the final product. Examples of suitable emulsifiers include, but are not limited to, lecithin (e.g., from egg or soy), alpha lactalbumin and/or mono- and di-glycerides, and mixtures thereof. Other emulsifiers are readily apparent to the skilled artisan and selection of suitable emulsifier(s) will depend, in part, upon the formulation and final product. Indeed, the incorporation of dietary butyrate into a nutritional composition, such as an infant formula, may require the presence of at least on emulsifier to ensure that the dietary butyrate does not separate from the fat or proteins contained within the infant formula during shelf-storage or preparation.
In some embodiments, the nutritional composition may be formulated to include from about 0.5 wt % to about 1 wt % of emulsifier based on the total dry weight of the nutritional composition. In other embodiments, the nutritional composition may be formulated to include from about 0.7 wt % to about 1 wt % of emulsifier based on the total dry weight of the nutritional composition.
In some embodiments where the nutritional composition is a ready-to-use liquid composition, the nutritional composition may be formulated to include from about 200 mg/L to about 600 mg/L of emulsifier. Still, in certain embodiments, the nutritional composition may include from about 300 mg/L to about 500 mg/L of emulsifier. In other embodiments, the nutritional composition may include from about 400 mg/L to about 500 mg/L of emulsifier.
The nutritional compositions of the present disclosure may optionally include one or more preservatives that may also be added to extend product shelf life. Suitable preservatives include, but are not limited to, potassium sorbate, sodium sorbate, potassium benzoate, sodium benzoate, potassium citrate, calcium disodium EDTA, and mixtures thereof. The incorporation of a preservative in the nutritional composition including dietary butyrate ensures that the nutritional composition has a suitable shelf-life such that, once reconstituted for administration, the nutritional composition delivers nutrients that are bioavailable and/or provide health and nutrition benefits for the target subject.
In some embodiments the nutritional composition may be formulated to include from about 0.1 wt % to about 1.0 wt % of a preservative based on the total dry weight of the composition. In other embodiments, the nutritional composition may be formulated to include from about 0.4 wt % to about 0.7 wt % of a preservative based on the total dry weight of the composition.
In some embodiments where the nutritional composition is a ready-to-use liquid composition, the nutritional composition may be formulated to include from about 0.5 g/L to about 5 g/L of preservative. Still, in certain embodiments, the nutritional composition may include from about 1 g/L to about 3 g/L of preservative.
The nutritional compositions of the present disclosure may optionally include one or more stabilizers. Suitable stabilizers for use in practicing the nutritional composition of the present disclosure include, but are not limited to, gum arabic, gum ghatti, gum karaya, gum tragacanth, agar, furcellaran, guar gum, gellan gum, locust bean gum, pectin, low methoxyl pectin, gelatin, microcrystalline cellulose, CMC (sodium carboxymethylcellulose), methylcellulose hydroxypropyl methyl cellulose, hydroxypropyl cellulose, DATEM (diacetyl tartaric acid esters of mono- and diglycerides), dextran, carrageenans, and mixtures thereof. Indeed, incorporating a suitable stabilizer in the nutritional composition including dietary butyrate ensures that the nutritional composition has a suitable shelf-life such that, once reconstituted for administration, the nutritional composition delivers nutrients that are bioavailable and/or provide health and nutrition benefits for the target subject.
In some embodiments where the nutritional composition is a ready-to-use liquid composition, the nutritional composition may be formulated to include from about 50 mg/L to about 150 mg/L of stabilizer. Still, in certain embodiments, the nutritional composition may include from about 80 mg/L to about 120 mg/L of stabilizer.
The nutritional compositions of the disclosure may provide minimal, partial or total nutritional support. The compositions may be nutritional supplements or meal replacements. The compositions may, but need not, be nutritionally complete. In an embodiment, the nutritional composition of the disclosure is nutritionally complete and contains suitable types and amounts of lipid, carbohydrate, protein, vitamins and minerals. The amount of lipid or fat typically can vary from about 1 to about 25 g/100 Kcal. The amount of protein typically can vary from about 1 to about 7 g/100 Kcal. The amount of carbohydrate typically can vary from about 6 to about 22 g/100 Kcal.
In an embodiment, the children's nutritional composition may contain between about 10 and about 50% of the maximum dietary recommendation for any given country, or between about 10 and about 50% of the average dietary recommendation for a group of countries, per serving of vitamins A, C, and E, zinc, iron, iodine, selenium, and choline. In another embodiment, the children's nutritional composition may supply about 10-30% of the maximum dietary recommendation for any given country, or about 10-30% of the average dietary recommendation for a group of countries, per serving of B-vitamins. In yet another embodiment, the levels of vitamin D, calcium, magnesium, phosphorus, and potassium in the children's nutritional product may correspond with the average levels found in milk. In other embodiments, other nutrients in the children's nutritional composition may be present at about 20% of the maximum dietary recommendation for any given country, or about 20% of the average dietary recommendation for a group of countries, per serving.
In some embodiments the nutritional composition is an infant formula. Infant formulas are fortified nutritional compositions for an infant. The content of an infant formula is dictated by federal regulations, which define macronutrient, vitamin, mineral, and other ingredient levels in an effort to simulate the nutritional and other properties of human breast milk. Infant formulas are designed to support overall health and development in a pediatric human subject, such as an infant or a child.
In some embodiments, the nutritional composition of the present disclosure is a growing-up milk. Growing-up milks are fortified milk-based beverages intended for children over 1 year of age (typically from 1-3 years of age, from 4-6 years of age or from 1-6 years of age). They are not medical foods and are not intended as a meal replacement or a supplement to address a particular nutritional deficiency. Instead, growing-up milks are designed with the intent to serve as a complement to a diverse diet to provide additional insurance that a child achieves continual, daily intake of all essential vitamins and minerals, macronutrients plus additional functional dietary components, such as non-essential nutrients that have purported health-promoting properties.
The exact composition of a growing-up milk or other nutritional composition according to the present disclosure can vary from market-to-market, depending on local regulations and dietary intake information of the population of interest. In some embodiments, nutritional compositions according to the disclosure consist of a milk protein source, such as whole or skim milk, plus added sugar and sweeteners to achieve desired sensory properties, and added vitamins and minerals. The fat composition includes an enriched lipid fraction derived from milk. Total protein can be targeted to match that of human milk, cow milk or a lower value. Total carbohydrate is usually targeted to provide as little added sugar, such as sucrose or fructose, as possible to achieve an acceptable taste. Typically, Vitamin A, calcium and Vitamin D are added at levels to match the nutrient contribution of regional cow milk. Otherwise, in some embodiments, vitamins and minerals can be added at levels that provide approximately 20% of the dietary reference intake (DRI) or 20% of the Daily Value (DV) per serving. Moreover, nutrient values can vary between markets depending on the identified nutritional needs of the intended population, raw material contributions and regional regulations.
The disclosed nutritional composition(s) may be provided in any form known in the art, such as a powder, a gel, a suspension, a paste, a solid, a liquid, a liquid concentrate, a reconstituteable powdered milk substitute or a ready-to-use product. The nutritional composition may, in certain embodiments, comprise a nutritional supplement, children's nutritional product, infant formula, human milk fortifier, growing-up milk or any other nutritional composition designed for an infant or a pediatric subject. Nutritional compositions of the present disclosure include, for example, orally-ingestible, health-promoting substances including, for example, foods, beverages, tablets, capsules and powders. Moreover, the nutritional composition of the present disclosure may be standardized to a specific caloric content, it may be provided as a ready-to-use product, or it may be provided in a concentrated form. In some embodiments, the nutritional composition is in powder form with a particle size in the range of 5 μm to 1500 μm, more preferably in the range of 10 μm to 300 μm.
The nutritional compositions of the present disclosure may be provided in a suitable container system. For example, non-limiting examples of suitable container systems include plastic containers, metal containers, foil pouches, plastic pouches, multi-layered pouches, and combinations thereof. In certain embodiments, the nutritional composition may be a powdered composition that is contained within a plastic container. In certain other embodiments, the nutritional composition may be contained within a plastic pouch located inside a plastic container.
In some embodiments, the method is directed to manufacturing a powdered nutritional composition. The term “powdered nutritional composition” as used herein, unless otherwise specified, refers to dry-blended powdered nutritional formulations comprising protein, and specifically plant protein, and at least one of fat and carbohydrate, which are reconstitutable with an aqueous liquid, and which are suitable for oral administration to a human.
Indeed, in some embodiments, the method comprises the steps of dry-blending selected nutritional powders of the nutrients selected to create a base nutritional powder to which additional selected ingredients, such as dietary butyrate, may be added and further blended with the base nutritional powder. The term “dry-blended” as used herein, unless otherwise specified, refers to the mixing of components or ingredients to form a base nutritional powder or, to the addition of a dry, powdered or granulated component or ingredient to a base powder to form a powdered nutritional formulation. In some embodiments, the base nutritional powder is a milk-based nutritional powder. In some embodiments, the base nutritional powder includes at least one fat, one protein, and one carbohydrate. The powdered nutritional formulations may have a caloric density tailored to the nutritional needs of the target subject.
The powdered nutritional compositions may be formulated with sufficient kinds and amounts of nutrients so as to provide a sole, primary, or supplemental source of nutrition, or to provide a specialized powdered nutritional formulation for use in individuals afflicted with specific diseases or conditions. For example, in some embodiments, the nutritional compositions disclosed herein may be suitable for administration to pediatric subjects and infants in order provide exemplary health benefits disclosed herein.
The powdered nutritional compositions provided herein may further comprise other optional ingredients that may modify the hysic mica: hedonic or processing characteristics of the products or serve as nutritional components when used the targeted population. Many such optional ingredients are known or otherwise suitable for use in other nutritional products and may also be used in the powdered nutritional compositions described herein, provided that such optional ingredients are safe and effective for oral administration and are compatible with the essential and other ingredients in the selected product form. Non-limiting examples of such optional ingredients include preservatives, antioxidants, emulsifying agents, buffers, additional nutrients as described herein, colorants, flavors, thickening agents and stabilizers, and so forth.
The powdered nutritional compositions of the present disclosure may be packaged and sealed in single or multi-use containers, and then stored under ambient conditions for up to about 36 months or longer, more typically from about 12 to about 24 months. For multi-use containers, these packages can be opened and then covered for repeated use by the ultimate user, provided that the covered package is then stored under ambient conditions (e.g., avoid extreme temperatures) and the contents used within about one month or so.
In some embodiments, the method further comprises the step of placing the nutritional compositions in a suitable package. A suitable package may comprise a container, tub, pouch, sachet, bottle, or any other container known and used in the art for containing nutritional composition. In some embodiments, the package containing the nutritional composition is a plastic container. In some embodiments, the package containing the nutritional composition is a metal, glass, coated or laminated cardboard or paper container. Generally, these types of packaging materials are suitable for use with certain sterilization methods utilized during the manufacturing of nutritional compositions formulated for oral administration.
In some embodiments, the nutritional compositions are packaged in a container. The container for use herein may include any container suitable for use with powdered and/or liquid nutritional products that is also capable of withstanding aseptic processing conditions (e.g., sterilization) as described herein and known to those of ordinary skill in the art. A suitable container may be a single-dose container, or may be a multi-dose resealable, or recloseable container that may or may not have a sealing member, such as a thin foil sealing member located below the cap. Non-limiting examples of such containers include bags, plastic bottles or containers, pouches, metal cans, glass bottles, juice box-type containers, foil pouches, plastic bags sold in boxes, or any other container meeting the above-described criteria. In some embodiments, the container is a resealable multi-dose plastic container. In certain embodiments, the resealable multi-dose plastic container further comprises a foil seal and a plastic resealable cap. In some embodiments, the container may include a direct seal screw cap. In other embodiments, the container may be a flexible pouch.
In some embodiments, the nutritional composition is a liquid nutritional composition and is processed via a “retort packaging” or “retort sterilizing” process. The terms “retort packaging” and “retort sterilizing” are used interchangeably herein, and unless otherwise specified, refer to the common practice of filling a container, most typically a metal can or other similar package, with a nutritional liquid and then subjecting The liquid-filled package to the necessary heat sterilization step, to form a sterilized, retort packaged, nutritional liquid product.
In some embodiments, the nutritional compositions disclosed herein are processed via an acceptable aseptic packaging method. The term “aseptic packaging” as used herein, unless otherwise specified, refers to the manufacture of a packaged product without reliance upon the above-described retort packaging step, wherein the nutritional liquid and package are sterilized separately prior to filling, and then are combined under sterilized or aseptic processing conditions to forma sterilized, aseptically packaged, nutritional liquid product.
The nutritional compositions described herein, in some embodiments, advantageously promote synaptic formation in a target subject by providing the nutritional composition disclosed herein to the target subject. Indeed, without being bound by any particular theory, providing the nutritional composition disclosed herein including inositol will promote cognitive function and synaptic function and formation in the target subject.
Further disclosed are methods for promoting brain development, including optimal and functional synaptic development in a target subject. Indeed, improving brain development provides improved cognition, visual acuity, motor function, learning capacity, motor skills, language skills, social interaction skills, and/or reduced anxiety. Further provided are methods for promoting or increasing the number of pre- and post-synaptic sited in developing neurons in target subjects. Also, provided are methods for increasing the size of pre- and post-synaptic sites in developing neurons in target subjects. Indeed, such increase in the number and size of pre- and post-synaptic neurons will strengthen neurotransmission in target subjects.
Also provided are methods for improving and/or increasing co-localization of pre- and post-synaptic sites in neurons or developing neurons in target subjects. Further disclosed are methods for promoting and/or improving synapse alignment or promoting or increasing the alignment of pre- and post-synaptic sites in the neurons of a target subject. Additionally, provided are methods for promoting and/or increasing neuronal axonal growth in target subjects. Further, disclosed are methods for increasing the density of pre- and post-synaptic specializations in neurons of target subjects.
In some embodiments, the disclosed methods comprise the step of administering the nutritional composition disclosed herein comprising inositol to the target subject. Indeed, in certain embodiments where the target subject is a formula-fed infant, the formula-fed infant will experience an improvement in synaptic formation and function, as compared to other formula-fed infants that are not provided the nutritional composition including inositol.
In certain embodiments, the target subject is an infant. In some embodiments, the infant is a formula-fed infant. Indeed, on average 93% of the total inositol content in human breast milk is present as free myo-inositol and the free and total concentration of inositol steadily decreases by more than half over the first year of lactation regardless of geographical location. Indeed, total inositol in human breast milk decreases from 192 μg/mL at 2 weeks lactation to an average of 88 μg/mL at 52 weeks of lactation. Accordingly, in some embodiments, the inositol provided to the target subject is maintained at a higher concentration as compared to breast milk-fed infants over 52 weeks.
Accordingly, in some embodiments, provided is a method for promoting synaptic formation in a formula-fed infant including the following steps: administering a nutritional composition having an inositol concentration of from about 14 mg/100 kcal to about 50 mg/100 kcal to an infant from the age of 0 to 6 months; and administering to the same formula fed infant a nutritional composition having an inositol concentration of from about 20 mg/100 kcal to about 50 mg/100 kcal to an infant from the age of 6 to 12 months. Accordingly, the method disclosed herein ensures that the target subject, i.e. formula-fed infant, will receive adequate inositol for a period of at least 12 months.
In some embodiments, provided is a staged feeding regimen or a method for promoting synaptic formation by administering a first nutritional composition having an inositol concentration of from about 25 mg/100 kcal to about 50 mg/100 kcal, for example 35 mg/100 kcal, to an infant from the age of birth to 3 months; administering a second nutritional composition having an inositol concentration of from about 20 mg/100 kcal to about 30 mg/100 kcal, for example 25 mg/100 kcal, to an infant from the age of 3 months to 6 months; and administering a third nutritional composition having an inositol concentration of from about 15 mg/100 kcal to about 25 mg/100 kcal, for example 20 mg/100 kcal, to an infant from the age of 6 months to 12 months.
In some embodiments the target subject may be a pediatric subject. Further, in one embodiment, the nutritional composition provided to the pediatric subject may be an infant formula. In certain embodiment, the inositol may be formulated in an infant formula together with other ingredients, such as DHA, ARA, lactoferrin, PE, sphingomyelin, inositol, ALA, EGCG, sulforaphane, butyrate, osteopontin, and combinations thereof. Without being bound by any particular theory the combination of inositol together with these selected ingredients may act synergistically and provide synergistic health benefits to the target subject.
All combinations of method or process steps as used herein can be performed in any order, unless otherwise specified or clearly implied to the contrary by the context in which the referenced combination is made.
The methods and compositions of the present disclosure, including components thereof, can comprise, consist of, or consist essentially of the essential elements and limitations of the embodiments described herein, as well as any additional or optional ingredients, components or limitations described herein or otherwise useful in nutritional compositions.
Example 1 illustrates that inositol has a does dependent effect on neurotransmission. Due to the continuum of synapse development in vivo, it is difficult to quantitatively assess synapse development. However, in order to provide at time stamp for synapse development, Example 1 is directed to a PDL-coated bead in a culture medium designed to induce synaptic formation. By using large sample sizes containing hundreds of beads and simplifying analysis using the uniform beads as a standard region of interest, this results in quantitative and highly reproducible data. By adding the PDL-coated beads to the axonal compartment of the microfluidic compartment, it allows for the visualization of presynaptic terminal development without the overwhelming signal from somata or dendrites. Indeed, this experimental set-up allows for the subjection of distinct compartments to nutrients of interest.
The method used herein is described in the reference, Taylor, A. M. et al. “A microfluidic culture platform for CNS axonal injury regeneration and transport.” Nat Methods, 2005. 2(8): p. 599-605, which is incorporated by reference. Briefly, the microfluidic chip contains four chambers, two at the left side and two at the right connected by microgrooves in the center. The cortical and hippocampal dissociated neurons from embryonic rat (E18) and mouse (E17) were seeded in the left (somal) side of the chambers with a density of approximately 3×106 cells/ml, yielding approximately 3,000 cells in the somal side of the chamber. The PDL-coated nanobeads were added to the right side of the chamber. In each testing condition, the culture medium contains different nutrient. The immunohistochemistry analysis was performed in order to assess the impact on synaptic development provided by the nutrients. The cultures were fixed using 4% paraformaldehyde for 30 min at room temperature. The cultures then were washed twice with phosphate-buffered saline (PBS) for 5 min, and then permeabilized using PBS with 0.2% Triton X-100 for 30 min. To block nonspecific binding, PBS with 0.2% Triton X-100 and 10% goat serum was used. The primary antibodies were exposed to PBS with 0.2% Triton X-100 and 5% goat serum at 4° C. overnight, followed by brief rinsing of the cultures 3 times for 10 min. They were then incubated them with secondary antibody (conjugated with Alexa Fluor 488 or 568) in PBS for 1 h. The images were taken and quantified by using confocal microscopy.
At embryonic Day 18, rat hippocampal neurons were plated on to microfluidic devices and inositol was added to both somal and axonal compartments from second day in vitro. Cultures were exposed with different concentrations of inositol at 200 μM, 600 μM, 1200 μM, or the control 40 μM, every 3 days by completely changing the media every three days. At 9 days in vitro (9DIV) the cultures were loaded with FM dye and electrical field stimulation of somal compartments was performed on each for about one minute. Cultures exposed to 200 μM and 600 μM inositol showed significant increases in releasing FM Dye as an indicator of neural transmitter release as compared to control wells containing 40 μM inositol. (See
Accordingly, as illustrated in
Example 2 illustrates the nutritional effect of inositol of presynaptic development. Indeed, in example 2 it was shown that inositol promotes presynaptic formation. For example, the hippocampal neurons in microfluidic chips were expose to either regular media containing 40 μM of inositol as a control, or 600 μM of inositol from at day 2 in vitro (2DIV). At embroyonic Day 18, rat hippocampal neurons were plated on to microfluidic devices and inositol was added to both somal and axonal compartments from second day in vitro 2DIV. Cultures were exposed to different concentrations of inositol including 200 μM, 600 μM, 1200 μM, or control (40 μM inositol) every three days by completely changing the media. At in vitro day 9 (9DIV), the cultures were loaded with FM dye and electrical field stimulation of somal compartments was performed for about 1 minute. At day 9 in vitro (9DIV), poly-D-lysine coated bead were added to the axon compartment and at day 10 in vitro (10DIV) cultures were fixed and immunostained with synaptic biomarkers, synapsin1, bassoon, and β-tubulin III. The measurements were quantified and subjected to statistical analysis by two-way ANOVA.
As illustrated in
Further,
Example 3 illustrates that inositol exposure increases neuronal axon growth. Generally, an axon is a long, slender projection of a neuron that conducts electrical impulses away from the neuron's cell body. Myelinated axons are generally known as nerve fibers. Axons make contact with other neurons at synapses. Therefore, the healthy status of a neural axon is fundamentally important for proper brain function. The integrity and growth of axons can be measured by immunohistochemistry with β-tubulin III. Indeed, illustrated herein, the absence of inositol causes axon growth to stop and truncate prematurely; while supplementation of inositol provides healthy growth of neuronal axons.
As shown in
Example 4 illustrates that supplementation with inositol produces strong synaptogenic effects. Nerve cells communicate with each other in the brain through specialized junctions, called synapses. These junctions start to form in the human brain before birth and continue to develop at a rapid rate in the early postnatal period. Changes in this synaptogenic process impair the wiring of the brain and can cause developmental disorders. While effects related to caloric intake and selected nutrients on general brain function have been characterized, limited information exists on the specific roles of nutrients and natural nutrients in synapse formation. Accordingly, Example 4 illustrates the effects of inositol on hippocampal neurons and analyzed them by quantitative immunostaining for synaptic markers. Dissociated neuronal cultures were prepared from rat hippocampus and used in this culture system. It was observed that neurons undergo most rapid synaptogenesis at or by day 14 in vitro (14DIV). By day 21 in vitro (21 DIV), most neurons have become mature and synapse formation occurs at a slower rate. Accordingly, testing at day 14 or 21 in vitro therefore allows for distinguishing nutrient effects at different developmental stages.
To test the effects of inositol on synaptogenesis, the embryonic neuronal culture system as shown in
Indeed, as shown in
Additionally,
Briefly, hippocampal cultures from embryonic rats were analyzed by quantitative immunostaining. Supplementation of neurons with the indicated concentrations of inositol from 4-14 days in vitro increase the size of presynaptic sites (as measured by Bassoon staining) and of postsynaptic sites (as measured by Homer staining.) (See.
Example 5 illustrates synergistic effect of inositol and DHA.
Formulation examples are provided to illustrate some embodiments of the nutritional composition of the present disclosure but should not be interpreted as any limitation thereon. Other embodiments within the scope of the claims herein will be apparent to one skilled in the art from the consideration of the specification or practice of the nutritional composition or methods disclosed herein. It is intended that the specification, together with the example, be considered to be exemplary only, with the scope and spirit of the disclosure being indicated by the claims which follow the example.
Table 4 provides an example embodiment of a peptide component including 8 peptides from Table 2.
Table 5 provides an example embodiment of a peptide component including certain peptides from Table 2.
Table 6, illustrated below, provides an example embodiment of the nutritional profile of a nutritional composition including dietary butyrate and describes the amount of each ingredient to be included per 100 Kcal serving of nutritional composition.
Lactobacillus rhamnosus GG (cfu)
1.5 × 1012
All references cited in this specification, including without limitation, all papers, publications, patents, patent applications, presentations, texts, reports, manuscripts, brochures, books, internet postings, journal articles, periodicals, and the like, are hereby incorporated by reference into this specification in their entireties. The discussion of the references herein is intended merely to summarize the assertions made by their authors and no admission is made that any reference constitutes prior art. Applicants reserve the right to challenge the accuracy and pertinence of the cited references.
Although embodiments of the disclosure have been described using specific terms, devices, and methods, such description is for illustrative purposes only. The words used are words of description rather than of limitation. It is to be understood that changes and variations may be made by those of ordinary skill in the art without departing from the spirit or the scope of the present disclosure, which is set forth in the following claims. In addition, it should be understood that aspects of the various embodiments may be interchanged in whole or in part. Therefore, the spirit and scope of the appended claims should not be limited to the description of the versions contained therein.
