Patent Application
20230037453
The current invention is related to a composition for use in vascular relaxation.
Cardiovascular diseases including myocardial infarction (MI), coronary artery diseases (CAD) and stroke remain the leading cause of death worldwide both in developed and developing countries. The development of major cardiovascular diseases is associated early in the process with the induction of an endothelial dysfunction characterized by a reduced formation of vasoprotective factors including nitric oxide (NO), increasing pro-oxidant factors and often also by the development of endothelium-dependent contracting responses.
Dietary intake of omega-3 fatty acids, namely alpha-linoleic acid (ALA), EPA and DHA, is beneficial for human health, in particular with respect to e.g. the amelioration of rheumatoid arthritis and reduction of cardiovascular disease risk factors (Balk EM, Lichtenstein AH, Nutrients 2017, 9(8); Calder PC, Biochim Biophys Acta 2015, 1851(4):469-484.). Various seafood products are a source of dietary EPA/DHA, but their consumption is often not sufficient to meet the recommended dietary allowance (typically 500 mg EPA and DHA per day) (Papanikolaou Y et al. 3rd, Nutr J 2014, 13:31). This gap is closed by the widespread use of dietary supplements or fortified foods containing omega-3 fatty acids (Clarke TC et al. Natl Health Stat Report 2015(79):1-16.). Dietary supplements are concentrated sources of nutrients or other substances with a nutritional or physiological effect, whose purpose is to supplement the normal diet (www.efsa.europa.eu/en/topics/topic/food-supplements). For example, omega-3 fatty acid supplements often contain either triglycerides or omega-3 ethyl esters of EPA/DHA from fish oil, krill oil, or algae.
Omega-3 fatty acids in general have anti-inflammatory, cardio- and neuroprotective effects (Schunck WH et al. Pharmacol Ther 2018, 183:177-204.). Their modes of action involve e.g. direct scavenging of reactive oxygen species, alteration of cell membrane fluidity, which subsequently affects cellular signaling events, modulation of the activity of transcription factors such as PPARy and NFkappaB that orchestrate the biosynthesis of pro- and anti-inflammatory cytokines, and competitive exclusion of substrates that are converted to proinflammatory mediators by cyclooxygenases and lipoxygenases. Although their potential beneficial effects include reduction of susceptibility to ventricular arrhythmia, antithrombogenic and antioxidant effect, retardation of the atherosclerotic plaque growth, anti-inflammatory effect, and mild hypotensive effect, the mechanisms by which they exert their cardiovascular protection have not been clarified.
Since daily consumption of these omega-3 sources with food or nutritional supplements is limited, it's important to assure maximum bioavailability of these fatty acids. Bioavailability of hydrophobic nutrients in the digestive system is often low and represents a challenge especially for supplements, because they are frequently consumed independently from a meal in the form of capsules or pills. Secretion of digestive fluids (bile acids, phospholipids, lipases) is hardly or not at all induced in the fasted state, which results in incomplete enzymatic hydrolysis of fats and oils, low solubilization and bioavailability.
Additional bioavailability challenges arise, when advanced formulation technologies are used to skip parts of the digestive systems in order to release omega-3 fatty acids in the lower part of the digestive system, e.g. in the small or large intestine. Capsules or tablets coated with respective release polymers can be used for this purpose. In these systems, the above mentioned, natural solubilization mechanisms are less effective, which reduces bioavailability and has to be compensated by appropriate measures.
In the context of the present invention the term PUFA is used interchangeably with the term polyunsaturated fatty acid and defined as follows: Fatty acids are classified based on the length and saturation characteristics of the carbon chain. Short chain fatty acids have 2 to about 6 carbons and are typically saturated. Medium chain fatty acids have from about 6 to about 14 carbons and are also typically saturated. Long chain fatty acids have from 16 to 24 or more carbons and may be saturated or unsaturated. In longer chain fatty acids there may be one or more points of unsaturation, giving rise to the terms “monounsaturated” and “polyunsaturated,” respectively. In the context of the present invention long chain polyunsaturated fatty acids having 20 or more carbon atoms are designated as polyunsaturated fatty acids or PUFAs.
PUFAs are categorized according to the number and position of double bonds in the fatty acids according to well established nomenclature. There are two main series or families of LC-PUFAs, depending on the position of the double bond closest to the methyl end of the fatty acid: The omega-3 series contains a double bond at the third carbon, while the omega-6 series has no double bond until the sixth carbon. Thus, docosahexaenoic acid (DHA) has a chain length of 22 carbons with 6 double bonds beginning with the third carbon from the methyl end and is designated “22:6 n-3” (all-cis-4,7,10,13,16,19-docosahexaenoic acid). Another important omega-3 PUFA is eicosapentaenoic acid (EPA) which is designated "20:5 n-3" (all-cis-5,8,11,14,17-eicosapentaenoic acid). An important omega-6 PUFA is arachidonic acid (ARA) which is designated “20:4 n-6” (all-cis-5,8,11,14-eicosatetraenoic acid).
Other omega-3 PUFAs include: Eicosatrienoic acid (ETE) 20:3 (n-3) (all-cis-11,14,17-eicosatrienoic acid), Eicosatetraenoic acid (ETA) 20:4 (n-3) (all-cis-8,11,14,17-eicosatetraenoic acid), Heneicosapentaenoic acid (HPA) 21:5 (n-3) (all-cis-6,9,12,15,18-heneicosapentaenoic acid), Docosapentaenoic acid (Clupanodonic acid) (DPA) 22:5 (n-3) (all-cis-7,10,13,16,19-docosapentaenoic acid), Tetracosapentaenoic acid 24:5 (n-3) (all-cis-9,12,15,18,21 -tetracosapentaenoic acid), Tetracosahexaenoic acid (Nisinic acid) 24:6 (n-3) (all-cis-6,9,12,15,18,21-tetracosahexaenoic acid).
Other omega-6 PUFAs include: Eicosadienoic acid 20:2 (n-6) (all-cis-11,14-eicosadienoic acid), Dihomo-gamma-linolenic acid (DGLA) 20:3 (n-6) (all-cis-8,11,14-eicosatrienoic acid), Docosadienoic acid 22:2 (n-6) (all-cis-13,16-docosadienoic acid), Adrenic acid 22:4 (n-6) (all-cis-7,10,13,16-docosatetraenoic acid), Docosapentaenoic acid (Osbond acid) 22:5 (n-6) (all-cis-4,7,10,13,16-docosapentaenoic acid), Tetracosatetraenoic acid 24:4 (n-6) (all-cis-9,12,15,18-tetracosatetraenoic acid), Tetracosapentaenoic acid 24:5 (n-6) (all-cis-6,9,12,15,18-tetracosapentaenoic acid).
Preferred omega-3 PUFAs used in the embodiments of the present invention are docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA).
Various approaches have been developed to solve the bioavailability problem, either by formulation, chemical modification of omega-3 fatty acids or both. One promising approach is the hydrolysis and subsequent saponification of omega-3 fatty acid esters, which mimics part of the natural digestive process and thereby increases solubility. WO2016102323A1 describes compositions comprising polyunsaturated omega-3 fatty acid salts that can be stabilized against oxidation.
During the last years, epidemiological studies have identified a relationship between diet and CVD, there is still considerable scientific uncertainty about the relationship between specific dietary components and cardiovascular risk (Schmitt and Ferro 2013 British Journal of Clinical Pharmacology, 75: 585-87; Carrizzo et al. 2019 Hypertension, 73: 449-57.). A promising dietary group for cardiovascular protection are polyphenols, especially flavonoids, as they are inversely associated with blood pressure and lower risk of hypertension (Godos, et al., 2019 Food & Nutrition Research, 61: 1-21.). On this regard, anthocyanins, natural pigments belonging to the flavonoid family are widely distributed in the human diet such as beans, fruits, vegetables, and red wine (Khoo et al. 2017 Food & Nutrition Research, 61: 1-21.). Actually, it is well-accepted that these natural products present in fruits and plant-derived-foods are relevant because of their potential health-promoting effects, as suggested by the available experimental and epidemiological evidence (Wallace 2011a). For this reason, interest in the biochemistry and biological effects of anthocyanin compounds has increased substantially during the last decade. It has been reported that anthocyanins exert positive effects on human health reducing inflammatory processes and counteracting oxidative stress (de Pascual-Teresa, Moreno and Garcia-Viguera 2010 Int J Mol Sci, 11: 1679-703.), improving the blood lipid profile, inhibiting the growth of cancerous cells (Hou 2003 Curr Mol Med, 3: 149-59.) and to owning anti-obesity effects (Tsuda et al. 2003 J Nutr, 133: 2125-30.). With regard to CVD, anthocyanins from blueberries or red wine showed an improvement in flow mediated dilation (FMD), and augmentation index in human, as well as NO-dependent vessel relaxation in mice (Andriambeloson, et al., 1998; Curtis, et al., 2019 J Nutr, 139: 2266-71; Rodriguez-Mateos, et al., 2019). Although all its beneficial properties, the possible direct action of anthocyanins on the vasculature, both at functional and molecular levels, remains completely unknown.
Anthocyanins are water-soluble vacuolar pigments that may appear red, purple or blue, depending on the surrounding pH-value. Anthocyanins belong to the class of flavonoids, which are synthesized via the phenylpropanoid pathway. They occur in all tissues of higher plants, mostly in flowers and fruits and are derived from anthocyanidins by addition of sugars. Anthocyanins are glycosides of flavylium salts. Each anthocyanin thus comprises three component parts: the hydroxylated core (the aglycone); the saccharide unit; and the counterion. Anthocyanins are naturally occurring pigments present in many flowers and fruit and individual anthocyanins are available commercially as the chloride salts, e.g. from Polyphenols Laboratories AS, Sandnes, Norway. The most frequently occurring anthocyanins in nature are the glycosides of cyanidin, delphinidin, malvidin, pelargonidin, peonidin and petunidin.
It is known that anthocyanins, especially resulting from fruit intake, have a wide range of biological activities, including antioxidant, anti-inflammatory, antimicrobial and anti-carcinogenic activities, improvement of vision, induction of apoptosis, and neuroprotective effects. Particularly suitable fruit sources for the anthocyanins are cherries, bilberries, blueberries, black currants, red currants, grapes, cranberries, strawberries, cowberries, elderberries, saskatoon berries and apples and vegetables such as red cabbage, black scented rice (especially the varieties ChakhaoPoireiton and ChakhaoAmubi), blue maize, winter barley, etc. (Benvenuti et al,, Journal of Food Science, Vol, 69, Nr, 3, 2004; Escalante-Aburto et al., Journal of Chemistry, Volume 2016 and Diczhazi et al, Cereal Chemistry (2014), 91(2), 195-200). Bilberries, in particular Vacciniummyrtillus, and black currants, in particular Ribesnigrum, are especially suitable.
Although their beneficial action, it has been reported that anthocyanins frequently interact with other phytochemicals, exhibiting synergistic biological effects making contributions from individual components difficult to decipher. In fact, the majority of intervention studies investigating anthocyanins have used foods containing several types of polyphenols. Only few studies have been performed using compounds (i.e. Medox®) containing purified anthocyanins isolated from bilberries. On this regard, it has been demonstrated that anthocyanin supplementation for 3-weeks reduces several NF-kB-regulated pro-inflammatory chemokines and immunoregulatory cytokines (Karlsen, A. et al. 2007. Anthocyanins inhibit nuclear factor-kappaB activation in monocytes and reduce plasma concentrations of pro-inflammatory mediators in healthy adults’, J Nutr, 137: 1951-4). Other studies showed an effect on HDL-C upregulation and LDL-C downregulation after 12-weeks of consumption (Qin, Y. et al. 2009. ‘Anthocyanin supplementation improves serum LDL-and HDL-cholesterol concentrations associated with the inhibition of cholesteryl ester transfer protein in dyslipidemic subjects’, American Journal of Clinical Nutrition, 90: 485-92.). However, an interesting study did not find similar effects on blood lipids after 500 mg of anthocyanins (cyanidin 3-glucoside) for 12 weeks (Curtis, P. J. et al. 2009. ‘Cardiovascular disease risk biomarkers and liver and kidney function are not altered in postmenopausal women after ingesting an elderberry extract rich in anthocyanins for 12 weeks’, J Nutr, 139: 2266-71), and hypothesized that different anthocyanins may possess different bioactivities.
Bilberries contain diverse anthocyanins, including delphinidin and cyanidin glycosides and include several closely related species of the genus Vaccinium, including Vacciniummyrtillus (bilberry), Vacciniumuliginosum (bog bilberry, bog blueberry, bog whortleberry, bog huckleberry, northern bilberry, ground hurts), Vacciniumcaespitosum (dwarf bilberry), Vacciniumdeliciosum (Cascade bilberry), Vacciniummembranaceum (mountain bilberry, black mountain huckleberry, black huckleberry, twin-leaved huckleberry), Vacciniumovalifolium (oval-leafed blueberry, oval-leaved bilberry, mountain blueberry, high-bush blueberry).
Dry bilberry fruits of V. myrtillus contain up to 10% of catechin-type tannins, proanthocyanidins, and anthocyanins. The anthocyanins are mainly glucosides, galactosides, or arabinosides of delphinidin, cyanidin, and - to a lesser extent - malvidin, peonidin, and petunidin (cyanidin-3-O-glucoside (C3G), delphinidin-3-O-glucoside (D3G), malvidin-3-O-glucoside (M3G), peonidin-3-O-glucoside and petunidin-3-O-glucoside). Flavonols include quercetin- and kaempferol-glucosides.
The fruits also contain other phenolic compounds (e.g., chlorogenic acid, caffeic acid, o-, m-, and p-coumaric acids, and ferulic acid), citric and malic acids, and volatile compounds.
Black currant fruits (R. nigrum) contain high levels of polyphenols, especially anthocyanins, phenolic acid derivatives (both hydroxybenzoic and hydroxycinnamic acids), flavonols (glycosides of myricetin, quercetin, kaempferol, and isorhamnetin), and proanthocyanidins (between 120 and 166 mg/100 g fresh berries). The main anthocyanins are delphinidin-3-O-rutinoside (D3R) and cyanidin-3-O-rutinoside (C3R), but D3G and C3G are also found (Gafner, Bilberry - Laboratory Guidance Document 2015, Botanical Adulterants Program).
EP 1443948 A1 relates to a process for preparing a nutritional supplement (nutraceutical) comprising a mixture of anthocyanins from an extract of black currants and bilberries. Anthocyanins were extracted from cakes of fruit skin produced as the waste product in fruit juice pressing from V. myrtillus and R. nigrum. It could be shown that the beneficial effects of individual anthocyanins are enhanced if instead of an individual anthocyanin, a combination of different anthocyanins is administered orally, in particular a combination comprising both mono and disaccharide anthocyanins. It is thought that the synergistic effect arises at least in part from the different solubilities and different uptake profiles of the different anthocyanins.
In the context it was surprisingly found that polyunsaturated fatty acid components selected from ethyl esters of the omega-3 fatty acids eicosapentaenoic acid (EPA) or docosahexaenoic acid (DHA) or amino acid salts of EPA or DHA exert an important vasorelaxant effect of mice resistance arteries. It could be demonstrated for the first time that an omega-3 lysine complex (AvailOm®) is able to evoke a direct endothelial vasorelaxation through the activation of nitric oxide dependent mechanism. In addition, it is able to significantly improve the endothelial impairment and the oxidative stress evoked by oxidized LDL. Though a vascular reactivity study and molecular analysis, it could be shown that AvailOm® exerts a direct vascular action inducing a dose-dependent vasorelaxation, which is dependent to AMPK/eNOS axis.
Moreover, the combination of AvailOm®, using a ratio 1:1, with most potent anthocyanins involved in the modulation of vascular tone, Cyanidin-3-O-galactoside (C3-gal) or C3-gal plus Delphinidin-3-o-arabinoside (DP3-ara) in combination, significantly improve dose-dependent vasorelaxation and nitric oxide production.
Therefore, the invention is related to a composition for use in vascular relaxation, wherein the composition comprises at least one polyunsaturated fatty acid component selected from an ethyl ester of the omega-3 fatty acids eicosapentaenoic acid (EPA) or docosahexaenoic acid (DHA) and an amino acid salt of EPA or DHA. The composition further comprises one or more of the following anthocyanins: cyanidin-3-galactoside, delphinidin-3-arabinoside.
The omega-3 forms that are commonly used in food fortification or nutritional supplements are krill oil, fish oil, or ethyl esters derived from the former. Recently, a technology has been described to stabilize EPA/DHA free fatty acids with amino acids resulting in solid and somewhat inert salts of EPA/DHA that can be introduced into e.g. food or supplement preparations. WO2016102323A1 describes compositions comprising polyunsaturated omega-3 fatty acid salts that can be stabilized against oxidation. WO2017202935A1 discloses a method for preparing a composition comprising omega-3 fatty acid salts and amines wherein a paste comprising one or more omega-3 fatty acid(s), one or more basic amine(s) and 20% by weight or less water, based on the total weight of the paste, is kneaded until a homogenous paste is obtained.
Compositions comprising polyunsaturated fatty acids may be obtained from any suitable source material which, additionally, may have been processed by any suitable method of processing such source material. Typical source materials include any part of fish carcass, vegetables and other plants as well as material derived from microbial and/or algal fermentation. Typically, such material further contains substantial amounts of other naturally occurring fatty acids. Typical methods of processing such source materials may include steps for obtaining crude oils such as extraction and separation of the source material, as well as steps for refining crude oils such as settling and degumming, de-acidification, bleaching, and deodorization, and further steps for producing PUFA-concentrates from refined oils such as de-acidification, trans-esterification, concentration, and deodorization (cf. e.g. EFSA Scientific Opinion on Fish oil for Human Consumption). Any processing of source materials may further include steps for at least partially transforming PUFA-esters into the corresponding free PUFAs or inorganic salts thereof.
Salts of lysine with polyunsaturated fatty acids per se are known in the art (cf. EP 0734373 B1), and were described as “very thick transparent oils, which transform into solids of waxy appearance and consistency at low temperatures” (cf. EP 0734373 B1, page 1, lines 47 to 48). However, salts of PUFAs can be obtained via spray drying conditions as described in WO2016102323A1 and WO2016102316A1.
In a preferred embodiment of the present invention, the amount of polyunsaturated fatty acid is 65 weight % or less, preferably 60 weight % or less, more preferably between 40 and 55 weight-% with respect to the total weight of polyunsaturated fatty acid salt.
In a further preferred configuration, the polyunsaturated fatty acids are selected from the omega-3 fatty acids EPA and DHA.
It is preferred, when the omega-3 fatty acid salts have an organic counter ion selected from lysine, arginine, ornithine, choline and mixtures of the same.
It is particularly preferred to use fatty acid salts comprising EPA and DHA and having an organic counter ion selected from lysine, arginine and ornithine. The lysine salt of EPA and DHA are even more preferred.
In a preferred embodiment, the composition further comprises cyanidin-3-galactoside (C3gal).
C3gal, also known as ideain, is an anthocyanin found in black currants, bilberries and other fruits and can be used from a natural origin or can be synthesized in vitro or in vivo. C3gal is the main anthocyanin in red-skinned or red-fleshed (for example Weirouge) apple varieties. It is also found in Chinese hawthorn fruits ( Crataegusspp.). C3Gal one of the anthocyanins present in bilberries ( Vacciniummyrtillus) and cranberries ( Vacciniummacrocarpon) and is the main anthocyanin in lingonberries ( Vacciniumvitis-idaea). In the leaves of Quintinia serrata, the tawheowheo, a species of evergreen trees endemic to New Zealand, different patterns of anthocyanins (including C3Gal) are present protect the shade-adapted chloroplasts from direct sun light. It is preferred to use extracts of fruits or cereals as a source of C3gal, selected from bilberries, cranberries, cowberries, lingonberries, red, yellow and green apple, aronia, black chokeberry, black scented rice ( ChakhaoPoireton, ChakhaoAmubi) and winter barley.
Information on anthocyanin content on different fruits can be found in the literature, such as for black currant red currant, black chokeberry, bilberry, cowberry, elderberry, (Benvenuti, S. et al. (2006). ‘Polyphenols, Anthocyanins, Ascorbic Acid, and Radical Scavenging Activity of Rubus, Ribes, and Aronia’, Journal of Food Science, Vol, 69, Nr, 3, 2004; Kähkönen, M.P. et al. 2003. ‘Berry anthocyanins: isolation, identification and antioxidant activities’, J Sci Food Agric 83:1403-1411; Wu X et al. 2004 ‘Characterization of anthocyanins and proanthocyanidins in some cultivars of Ribes, Aronia, and Sambucus and their antioxidant capacity’, J, Agric, Food Chem, 52, 7846-7856.), strawberry, sweet cherry and sour cherry (Jakobek L. et al. 2007. ‘Flavonols, Phenolic Acids and Antioxidant Activity of Some Red Fruits’, Deutsche Lebensmittel-Rundschau, 103, Jahrgang, Heft 2, 2007), wild blueberries and Saskatoon berries (Hosseinian FS et al. 2007 ‘ Saskatoon and wild blueberries have higher anthocyanin contents than other Manitoba berries’, Journal of Agricultural and Food Chemistry, 55(26), 10832-10838), rhubarb petioles (Takeoka, G.R. et al. 2013.‘Antioxidant activity, phenolic and anthocyanin contents of various rhubarb (Rheum spp.) varieties’, International Journal of Food Science and Technology, 48(1), 172-178), black scented rice ChakhaoPoireton, ChakhaoAmubi (Asem, I.D. et al. 2015. ‘Anthocyanin content in the black scented rice (Chakhao): its impact on human health and plant defense’, Symbiosis (2015), 66(1), 47-54).
High amounts of delphinidin-3-arabinoside are present in bilberries and black scented rice.
Therefore, in a preferred embodiment, the composition comprises fruits / cereals or extracts therefrom selected from the following: bilberries, cranberries, cowberries, lingonberries, red, yellow and green apple, aronia, black chokeberry, black scented rice ( ChakhaoPoireton, ChakhaoAmubi) and winter barley, preferably black chokeberry, bilberries and cowberries.
It is particularly preferred to provide mixtures with similar amounts of the beneficial anthocyanins, to ensure maximum vasorelaxant effects. Therefore, in an advantageous configuration of the present invention, the mixture comprises the omega-3 fatty acid amino acid salt and fruits or fruit extracts of black chokeberry, bilberries and cowberries.
In a preferred embodiment, the mixture comprises the omega-3 fatty acid amino acid salt and fruits or fruit extracts of black chokeberry, bilberries and cowberries in a ratio (in weight-%) of 15-35 : 0.25-2.5 : 60-80 : 1-10. It is particularly preferred to use ratios (in weight-%) of 25 : 1 : 71 : 3.
In a preferred embodiment, the composition is for preventing or treating a disease or disorder selected from cardiovascular diseases, preferably atherosclerosis, hypertension, stroke, diabetes-related cardiovascular disfunctions, ischemia/reperfusion injury, hypercholesterolemia, coronary artery disease, chronic obstructive pulmonary disease (COPD).
In another preferred embodiment, the composition is for preventing or treating a disease or disorder in connection with stress and low mental performance, preferably Burnout, low cognitive performance, bad sleep quality, and stress situations in general.
The invention also relates to a composition comprising at least one omega-3 fatty acid amino acid salt, comprising eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) and one or more of the following anthocyanins: cyanidin-3-galactoside, delphinidin-3-arabinoside, preferably cyanidin-3-galactoside.
In a preferred embodiment, the composition comprises fruits or extracts selected from the following: bilberries, cranberries, cowberries, lingonberries, red, yellow and green apple, aronia, black chokeberry, black scented rice ( ChakhaoPoireton, ChakhaoAmubi) and winter barley, preferably black chokeberry, bilberries and cowberries.
In a preferred embodiment, the composition comprises the omega-3 fatty acid amino acid salt and fruits or fruit extracts of black chokeberry, bilberries and cowberries in a ratio (weight-%) of 15-35 : 0.25-2.5 : 60-80 : 1-10, more preferably in a ratio (weight-%) of 25 : 1 : 71 : 3.
The omega-3 lysine salt (AvailOm®) was obtained from Evonik Nutrition & Care GmbH, Darmstadt (Germany) and contains around 32 weight-% of L-lysine and around 65 weight-% of polyunsaturated fatty acids. The major polyunsaturated fatty acids in the composition are the omega-3 fatty acids Eicosapentaenoic acid (C20:5w3c) (EPA) and Docosahexaenoic acid (C22:6w3c) (DHA), summing up to around 58 weight-% of the composition. The composition also contains minor amounts of Docosaenoic acid isomer (incl. erucic acid) (C22:1), Docosapentaenoic acid (C22:5w3c) and of the omega-6 fatty acids Arachidonic acid (C20:4w6) and Docosatetraenoic acid (C22:4w6c). The single ω-3 Fatty Acids (ω -3 FA) and L-Lysin were obtained from Evonik Nutrition & Care GmbH, Darmstadt (Germany), the ω-3 Ethyl Ester (ω-3 EE) were obtained from Solutex GC S.L., Madrid (Spain). oxLDL has been acquired from Thermo Fisher. All the inhibitors, powders and solvents necessary for the preparation of the buffers were purchased by Sigma-Aldrich.
Healthberry 865® (HB) is a dietary supplement consisting of 17 purified anthocyanins (all glycosides of cyanidin, peonidin, delphinidin, petunidin, and malvidin) isolated from black currant ( Ribesnigrum) and bilberries ( Vacciniummyrtillus) and was obtained from Evonik Nutrition & Care GmbH, Darmstadt (Germany). The major anthocyanins contained in the berry extract used are cyanidin-3-glucoside, cyanidin-3-rutinoside, delphinidin-3-glucoside, delphinidin-3-rutinoside, cyanidin-3-galactoside and delphinidin-3-galactoside. The amount of anthocyanin citrate is at least 25 weight-% of the composition. The composition is prepared from black currants and bilberries by a process comprising the steps of alcoholic extraction of black currants and bilberries, purification via chromatography, mixing of the extracts with maltodextrin citrate and water and spray-drying of the mixture. The product composition contains extracts of black currants and bilberries mixed in a weight ratio of around 1:1.
The single anthocyanins, Delfinidin-3-rutinoside (D3-rut), Cyanidin-3-rutinoside (C3-rut), Delphinidin-3-glucoside (DP3-glu), Cyanidin-3-glucoside (C3-glu), Petunidin-3-glucoside (PT3-glu), Delphinidin-3-galactoside (DP3-gal), Peonidin-3-galactoside (PEO3-gal), Delphinidin-3-arabinoside (DP3-ara), Malvidin-3-galactoside (MAL3-gal), Malvidin-3-glucoside (MAL3-glu), Cyanidin-3-galactoside (C3-gal), Cyanidin-3-arabinopyranoside (C3-arapy) were obtained from Polyphenols AS, Sandnes (Norway).
All experiments involving animals were conformed to the Guide for the Care and Use of Laboratory Animals published by the US National Institutes of Health (NIH Publication No. 85-23, revised 2011) and were approved by review board. Wild-type C57BL/6 mice (weighing ∼ 25 g) (Jackson Laboratories, Bar Harbor, ME, USA) have been used to perform vascular reactivity and molecular studies.
Second-order branches of the mesenteric arterial tree were removed from mice to perform vascular studies. Vessels were placed in a wire or pressure myograph system filled with Krebs solution maintained at pH 7.4 at 37° C. in oxygenated (95% O2/5% CO2). First, an analysis of vascular reactivity curves was performed. In particular, vasoconstriction was assessed with 80 mmol/L of KCI or with increasing doses of phenylephrine (from 10-9 M to 10-6 M) in control conditions. Endothelium-dependent and -independent relaxations were assessed by measuring the dilatory responses of mesenteric arteries to cumulative concentrations of acetylcholine (from 10-9 M to 10-6 M) or nitroglycerine (from 10-9 M to 10-6 M) respectively, in vessels precontracted with phenylephrine at the dose necessary to obtain a similar level of precontraction in each ring (80% of initial KCI-evoked contraction). Caution was taken to avoid endothelial damage; functional integrity was reflected by the response to acetylcholine (from 10-9 M to 10-6 M).
Vascular responses were then tested administering increasing doses of Healthberry 865® - 865 or single anthocyanins. Some experiments were performed in presence of selective inhibitors, such as phosphatidylinositol-4,5-bisphosphate 3-kinase inhibitor (LY274002, 10 µM, 1 h), Akt inhibitor (Akt inh, 1 µM, 1 h) or the NOS inhibitor N-ω-nitro-I-arginine methyl ester (L-NAME, 300 µM, 30 min) before data for dose-response curves were obtained.
Production of NO was assessed as previously described (Carrizzo et al. 2016). AvailOm® (100 µg/mL) or acetylcholine (10-6 M) was administered to the mesenteric artery in the last 30 min of 4-amino-5-methylamino-2,,7,-difluorofluorescein diacetate (DAF-FM) incubation, alone and after 20 min exposure to L-NAME (300 umol/L, 30 min). Mesenteric segments were cut in 5-µm thick sections, observed under a fluorescence microscope, subsequently counterstained with haematoxylin and eosin and observed under a light microscope.
Dihydroethidium (DHE, Life Technologies) was used to evaluate production of reactive oxygen species (ROS) in mouse mesenteric arteries, as previously described. Briefly, vessels were incubated with 5 µM of DHE for 20 min and subsequently observed under a fluorescence microscope (Zeiss). Images were acquired by a digital camera system (Olympus Soft Imaging Solutions). A second, estimation of total ROS production in mouse vessels was performed with the membrane-permeable fluorescent probe an analog of 2,7-Dichlorodihydrofluorescein (DCDHF), Dihydrorhodamine 123 (DHR123) (Invitrogen). After treatment, vessels were incubated with Krebs solution containing 5 µM DHR123 for 30 min at 37° C., and then washed two times with PBS prior to fluorescence measurement using a fluorescence microplate reader (TECAN infinite 200 Pro).
Data are presented as mean±SEM. Statistical analysis was performed by 2-way ANOVA followed by Bonferroni post hoc test. Repeated measurements were analysed by One-way ANOVA followed Bonferroni post-hoc test. Differences were considered to be statistically significant at p<0.05.
To assess the possible direct vascular action of AvailOm®, vascular reactivity studies on mice vessels were performed, administering increasing doses of AvailOm® (5 - 300 ug/mL) on pre-constricted mice mesenteric arteries, considering the concept that alteration of vascular response of resistance arteries reflects in an important contribution to the development of cardiovascular complications. The data demonstrate that AvailOm® exerts a direct dose-response vasorelaxant action (
Subsequently the possible effect of AvailOm® on oxidative stress induced by oxLDL was assessed. As reported in
In a next step, the possible vascular action of AvailOm® in combination with different anthocyanins Cyanidin-3-O-galactoside (C3-gal) or C3-gal plus Delphinidin-3-o-arabinoside (DP3-ara) was assessed, maintaining a ratio ½:½, maintaining the same overall amount of the substance to be tested. The data demonstrate that in presence of both C3-gal and C3-gal with DP3-ara, AvailOm® is able to exert a most powerful vasorelaxant effect, which can be seen in a significant improvement of endothelial dependent vasorelaxation at 50, 100 and 150 µg/mL in comparison to AvailOm® alone (
The assessment of nitric oxide production by DAF-FM revealed both in presence of C3-gal and C3-gal with DP3-ara a significant improvement of NO production in comparison to AvailOm® or C3-gal alone (100 µg/mL) (
The possible action of AvailOm® in combination with different anthocyanins' mixtures on ROS production was analyzed. First of all, the measurement of oxLDL evoked ROS production showed that AvailOm® plus MIX6 (C3-glu + DP3-glu + Mal3-glu + Mal3-gal + PEO3-gal), respecting a ratio of 1:6 of each product, was able to significantly reduce the oxidative stress with a major degree respecting to AvailOm® alone or AvailOm® in combination with MIX 1 (C3-glu + C3-gal), MIX 2 (Mal3-glu + Mal3-gal), MIX 3 (C3-glu + DP3-glu + Mal3-glu), MIX 4 (Mal3-gal + PEO3-gal) or MIX 5: C3-glu + DP3-glu + C3-rut + Mal3-glu + Mal3-gal + PEO3-gal (
The vascular properties of single anthocyanins contained in Healthberry 865®: Delphinidin-3-rutinoside (D3-rut), Cyanidin-3-rutinoside (C3-rut), Delphinidin-3-glucoside (DP3-glu), Cyanidin-3-glucoside (C3-glu), Petunidin-3-glucoside (PT3-glu), Delphinidin-3-galactoside (DP3-gal), Peonidin-3-galactoside (PEO3-gal), Delphinidin-3-arabinoside (DP3-ara), Malvidin-3-galactoside (MAL3-gal), Malvidin-3-glucoside (MAL3-glu), Cyanidin-3-galactoside (C3-gal) and Cyanidin-3-arabinopyranoside (C3-arapy) were tested on mice mesenteric arteries.
Interestingly, the evaluation of the possible direct vascular action of C3-rut, C3-glu, DP3-glu, PT3-glu, DP3-glu PEO3-gal, DP3-gal, MAL3-gal, DP3-ara and MAL3-glu revealed that none of the single anthocyanins was able to evoke a dose-dependent vasorelaxation comparable to that observed after Healthberry 865® administration (
In order to achieve an optimal ratio of all anthocyanins, which have a strong vasorelaxant effect, literature values for the content of the single anthocyanins in specific fruits were compared. Since it is postulated that the beneficial anthocyanins shall be present in a nearly equimolar ratio, the fruits with the highest amounts of the respective anthocyanins were combined in different ratios to achieve balanced ratios of the anthocyanins cyanidin-3-galactoside and delphinidin-3-arabinoside.
The content of anthocyanins was analyzed in detail for black chokeberry, bilberry, cowberry, (Benvenuti et al., 2004; Kähkönen et al., 2003; Wu et al., 2004).
By mixing fruits with high amounts of the desired anthocyanins, the following contents of the specific anthocyanins were achieved:
After mixing the desired berries in the ratio of 1 : 1 : 1, the specific anthocyanins are present in different amounts in the mixture, differing by a factor of 17.
By mixing fruits with high amounts of the desired anthocyanins in an optimized ratio, the following contents of the specific anthocyanins were achieved:
After mixing the desired berries in the ratio (weight-%) of 0.3 : 25 : 1, the specific anthocyanins are present in similar amounts in the mixture, differing by a factor of less than 2. This corresponds to the mixing ratio of anthocyanins from the previous experiments.
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| Number | Date | Country | Kind |
|---|---|---|---|
| 20167493.4 | Apr 2020 | EP | regional |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/EP2021/057615 | 3/24/2021 | WO |
