Patent Application
20180066020
The present invention relates to a cyclic peptide and a medicament, external preparation and cosmetic comprising said cyclic peptide.
BNP (brain natriuretic peptide) is a hormone which is synthesized and secreted in heart (predominantly in ventricles). BNP was isolated from and identified in pig brain in 1988, and it has been known since that BNP is secreted from ventricular myocardium of human, etc. An increase in cardiac stress or development of myocardial hypertrophy induces BNP secretion and increased in blood concentration. In general, BNP has activities such as diuretic activity, vasodilation, renin-aldosterone secretion suppressing action, sympatholytic activity, hypertrophy suppressing action. BNP is considered to a hormone which acts to protect the myocardium against damages caused by cardiac stress.
Amino acids constituting BNP differ slightly from species to species who produce BNP. Nevertheless it been revealed that its structure possesses a cyclic part and a tail part as a common structure (Non-Patent Literatures 1-2). For instance, wild-type human BNP has been known to consist 32 amino acid residues, and its fragments and derivatives are further proposed (Patent Literatures 1-6).
In Japan, BNP is currently not used as a therapeutic, but widely used in clinical practice as a biochemical marker for cardiac failure. In United States, however, it is used as a drug for alleviating symptoms of cardiac failure (trade name: Natrecor®). Recently, it has been proposed to utilize an external preparation comprising BNP for treating dermatitis, rhinitis, alopecia, etc., and also as a skin-improving agent (Patent Literature7-9).
As described above, BNP is considered to be a useful substance for the therapy of various diseases. However, in order to obtain a better therapeutic effect there is a need for developing a substance with a higher drug efficacy and stronger effect and a faster- and longer-acting substance.
An improvement in the duration and fast-acting properties of the drug efficacy and effect is quite meaningful in light of reducing required number/frequency of treatment, relieving the sufferings by the patient/user, and improving the quality of life (QOL) and the mental, physical, social or intellectual satisfaction in dairy living of the user. For example, dermatitis is often accompanied by symptoms such as an itch, infiltration or hot flush in the affected site; the sufferings by the patient will be reduced if these symptoms can quickly be alleviated. When an alopecia therapeutic, hair growing agent or hair growth stimulant is employed, the QOL of the user can be improved if the therapeutic effect, hair growth-stimulating or hair growing effect can be achieved immediately.
The inventors focused on these points and tried to search for a novel substance by reference to the structure of BNP.
Accordingly, the object of the present invention is to provide a novel peptide having a strong drug efficacy and effect, and a medicament or an external preparation comprising such peptide, specifically a prophylactic or therapeutic for dermatitis, rhinitis and alopecia, and a hair growth stimulant, a hair growing agent, an antipruritic, a cosmetic and a skin-care product, etc.
It was previously considered that the tail part of the wild-type BNP peptide structure (which is composed of a cyclic part and tail part) plays at least certain important role in the binding and selectivity of BNP to its receptor. However, the inventors focused on the cyclic part of said structure, deleted the tail part, and made an intensive research on the resulting cyclic peptide. Accordingly we have obtained totally new findings including the effects of such cyclic peptide, its high drug efficacy, faster-acting and longer-lasting effect, and further continued the study and finally completed the invention.
Accordingly, the present invention relates to the followings:
[1] A cyclic peptide having an amino acid sequence expressed by Formula I:
wherein,
X1 denotes Gly, Val, Ala, Ser or Thr,
X2 denotes Arg, Gln or His,
X3 denotes Lys or Arg,
X4 denotes Met, Leu or Ile,
X5 denotes Ile or Val,
X6 denotes Ser or Gly,
X7 denotes Ser or Ala,
X8 denotes Ser, Gln, Val, Ala, Thr, Leu, Ile or Met,
X9 denotes Ser, Val, Ala or Thr,
X10 denotes Gly or Arg,
X11 denotes Leu, Met, Ile, Val or Ala,
X12 denotes Gly, Ser or Ala, and
the line connecting two Cys denotes a disulfide bond,
and wherein the amino acid sequence does not have a peptide bond that is not between the amino acids constituting the amino acid sequence,
or a derivative thereof or a pharmaceutically acceptable salt thereof.
[2] The cyclic peptide according to [1], wherein
or a derivative thereof or a pharmaceutically acceptable salt thereof.
[3] The cyclic peptide according to [1], wherein the amino acid sequence is selected from the amino acid sequences expressed by Formula (I-a)-Formula (I-e):
wherein, the line connecting two Cys denotes a disulfide bond,
or a derivative thereof or a pharmaceutically acceptable salt thereof.
[4] The cyclic peptide according to any one of [1]-[3] or a derivative thereof or a pharmaceutically acceptable salt thereof, wherein the derivative is substituted by a substituent which is capable of replacing a hydrogen atom, hydroxyl group, carboxy group, amino group or imino group in the cyclic peptide.
[5] The cyclic peptide or a derivative thereof or a pharmaceutically acceptable salt thereof, which is formed by deleting 1 to 4 amino acids in the cyclic peptide expressed by any one of the Formulae (I-a)-(I-e) according to [3], or by replacing them with or adding them other amino acids, and which has an equal function with the cyclic peptide expressed by each of said formulae.
[6] An external preparation comprising one or more cyclic peptides according to any one of [1]-[5] and/or a derivative thereof and/or a pharmaceutically acceptable salt thereof.
[7] The external preparation according to [6], wherein the external preparation is an ingredient for a dermatitis therapeutic, dermatitis prophylactic, antipruritic, antiphlogistic, epidermis regeneration accelerating agent, wound epithelialization-accelerating agent or skin-care product.
[8] The external preparation according to [7], wherein the skin-care product is for moisturizing, and/or for preventing or improving rough skin, and/or for sebum/acne care, and/or for irritation alleviation/anti-inflammation, and/or for skin-lightening, and/or for anti-aging, and/or for preventing/alleviating ultraviolet lesion, and/or for slimming, and/or for skin-cleansing.
[9] The external preparation according to [6], wherein the external preparation is a bath agent, a body-cleansing agent or a hair-cleansing agent.
[10] The external preparation according to [6], wherein the external preparation is an alopecia therapeutic, an alopecia prophylactic, a hair growing agent and/or a hair growth stimulant.
[11] The external preparation according to [6], wherein the external preparation is a rhinitis therapeutic and/or a rhinitis prophylactic.
[12] The external preparation according to [6], wherein the external preparation is a cosmetic.
[13] The external preparation according to any one of [6]-[12], wherein the formulation is a solid, semi-solid, powder, liquid, spray, ointment, cream, emulsion, gel or patch formulation.
[14] The external preparation according to any one of [6]-[13], wherein the external preparation is used as a pharmaceutical product, a quasi-drug or a cosmetic product.
[15] A use of the cyclic peptide according to any one of [1]-[4] and/or a derivative thereof and/or a pharmaceutically acceptable salt thereof for preparing the external preparation.
[16] A method of using the external preparation comprising applying the external preparation according to any one of [6]-[14] to the skin and/or mucosa of a subject.
[17] The method of using the external preparation according to [16], wherein the mucosa is labial, oral, nasal, ocular or vaginal mucosa.
[18] The method of using the external preparation according to [16], wherein the method is a method of treating and/or preventing dermatitis, a method of alleviating or resolving itch, a method of treating eczematous or other erosion or ulcer, or a method for skin-care.
[19] The method of using the external preparation according to [16], wherein the method is a method of treating and/or preventing alopecia, and/or a method of stimulating hair growth, and/or a method of growing hair.
[20] The method of using the external preparation according to [16], wherein the method is a method of treating and/or preventing rhinitis.
[21] A medicament comprising one or more cyclic peptides according to any one of [1]-[5] or a derivative thereof or a pharmaceutically acceptable salt thereof.
[22] The medicament according to [21], wherein the medicament is a therapeutic for hypertension, unstable angina, acute myocardial infarction, edematous diseases, renal failure, cardiac failure, immune diseases, obesity or metabolic syndrome.
The cyclic peptide described herein (hereinafter also referred to as “BNP cyclic peptide”, “B ring” or “B ring-compound”) is, as described above, derived from wild-type BNP. The wild-type BNP encompasses BNP from human, as well as BNPs from monkeys, pigs, birds and rats. Therefore, the B ring-compound also encompasses the B ring-compound from human, as well as those from monkeys, pigs, birds and rats.
According to the present invention, novel cyclic peptides and compositions comprising the same can be provided. Such compositions are applied to an external preparation for preventing or treating dermatitis, rhinitis or alopecia, and further applied to a hair growth stimulant, a hair growing agent or an antipruritic, each of which are provided as a medicament, a quasi-drug, a skin-care product, or a cosmetic product. When an “external preparation” is referred alone in the present invention, it means an agent that is applied to skin or mucosa, whose utility is not limited to a medicament, quasi-drug, skin-care product and cosmetic product.
In general, the external preparation of the present invention has a significantly higher efficacy against dermatitis as compared to a conventional steroid external preparation, as well as an excellent immediate effect such that the symptoms start to be improved within three minutes in general. Its effect is great and long-lasting, and the amelioration period is long.
Furthermore, the external preparation of the present invention can, upon being applied onto the subject's skin or mucosa suffering a dermatitis, quickly relieve or eliminate perceptible symptoms that are or can be caused by dermatitis such as pruritus, soreness (pain), hot sensation, tautness, infiltration and erythema, improving the symptoms of the dermatitis.
Furthermore, the external preparation of the present invention exerts a moisturizing effect on the applied site, while exerting an effect to improve skin texture where the corneum layer is present at the applied site. It can thus exerts effects to improve skin texture, improves dry or rough skin, softens and moisturizes skin, reduce and diminish wrinkles, and improve roughened lip.
The external preparation of the present invention also has an effect of stimulating hair growth or promoting hair growth and at the same time preventing hair loss at the applied site when being applied to a decalvant site or a site where hair growth is stimulated. In this case, stimulated hairs tend to become terminal hairs and not white hairs. These effects are exhibited relatively quick as compared to other active agents that have previously been used in the therapeutics for alopecia, e.g., BNP, and the obtained effects are more significant.
Yet the external preparation of the present invention has an immediate, large and long-lasting effect effect on rhinitis with a long amelioration period.
Besides, since the cyclic peptide of the invention is a peptide sharing a part of its structure with BNP which is a hormone inherent in body, it causes little concern about side effects. It is also considered to have a small influence on homodynamics as long as used in an appropriate amount or used externally onto skin, etc. It therefore can be administered for prolonged period to a patient in need thereof, e.g., a patient with chronic dermatitis. Moreover, the external preparation of the invention causes no irritation when being taken externally and can be applied safely to a patient with sensitive skin, as well as to a child or woman, on face or neck, etc.
The reason why the cyclic peptide of the invention has a superior drug efficacy and effect as compared with wild-type BNP is not yet clear. However, according to our in silico analysis, it is suggested that the cyclic peptide of the invention is more easily and strongly bound to NPR-A receptor (GC-A) as compared with wild-type BNP. It is thus predicted that the cyclic peptide would have an excellent drug efficacy and effect, an excellent immediate effect in particular. As described above, B ring-compound is derived not only from human, but there also are B rings from animals of other species such as monkeys, pigs, birds and rat, and it has been confirmed that they have similar structures. From the results of the structural analysis described hereinbelow, it is strongly speculated that all these B rings exert similar effects as those of the B ring-compound from human.
A diagram showing the result of applying BNP cyclic peptide (A) or a gel formulation (B) on either left or right side of the face of a subject having large wrinkles on the face.
A diagram showing the effect before and after the application of either B ring gel formulation or BNP gel formulation to a patient with female pattern alopecia and alopecia pityroides.
Hereinafter, the present invention is explained in detail based on its suitable embodiments.
1. The cyclic peptide, a derivative thereof and a pharmaceutically acceptable salt thereof Firstly, the cyclic peptide of the invention, a derivative thereof and a pharmaceutically acceptable salt thereof are explained.
The cyclic peptide of the present invention has an amino acid sequence expressed by Formula I:
wherein,
X1 denotes Gly, Val, Ala, Ser or Thr,
X2 denotes Arg, Gln or His,
X3 denotes Lys or Arg,
X4 denotes Met, Leu or Ile,
X5 denotes Ile or Val,
X6 denotes Ser or Gly,
X7 denotes Ser or Ala,
X8 denotes Ser, Gln, Val, Ala, Thr, Leu, Ile or Met,
X9 denotes Ser, Val, Ala or Thr,
X10 denotes Gly or Arg,
X11 denotes Leu, Met, Ile, Val or Ala,
X12 denotes Gly, Ser or Ala,
the line connecting two Cys denotes a disulfide bond,
and wherein the amino acid sequence does not have a peptide bond that is not between the amino acids constituting the amino acid sequence.
Such cyclic peptide is, similar to previously known BNPs, considered to bind to a receptor NPR-A (also known as GC-A) having a guanylate cyclase domain and promote the production of cyclic guanosine monophosphate (cGMP), and has activities such as, for example, diuretic action, vasodilation, renin-aldosterone secretion suppressing action, sympatholytic activity and hypertrophy suppressing action. It has a superior drug efficacy and effect, particularly an excellent immediate effect, as compared to BNP.
In addition, as described hereinbelow, the above cyclic peptide can be used as an ingredient of an external preparation for a dermatitis therapeutic/prophylactic, a rhinitis therapeutic/prophylactic, an alopecia therapeutic/prophylactic, a hair growing agent, a hair growth stimulant, an antipruritic, etc., or as an ingredient of a skin-care product, a quasi-drug or a cosmetic product. The above cyclic peptide can also be used as an alternative for BNP in an medicament utilizing the activity of BNP as above, e.g., in an medicament for hypertension, unstable angina, acute myocardial infarction, edematous diseases, renal failure, cardiac failure, immune diseases, obesity or metabolic syndrome.
In another embodiment of the present invention, in the cyclic peptide of the invention, X1-X12 in the Formula (I) may be defined as one or more selected from the group consisting of following (1)-(12):
(1) X1 denotes Gly, Val, Ala, Ser or Thr,
(2) X2 denotes Arg, Gln or His,
(3) X3 denotes Lys or Arg,
(4) X4 denotes Met, Leu or Ile,
(5) X5 denotes Ile or Val,
(6) X6 denotes Ser or Gly,
(7) X7 denotes Ser or Ala,
(8) X8 denotes Ser, Gln, Val, Ala, Thr, Leu, Ile or Met,
(9) X9 denotes Ser, Val, Ala or Thr,
(10) X10 denotes Gly or Arg,
(11) X11 denotes Leu, Met, Ile, Val or Ala, and
(12) X12 denotes Gly, Ser or Ala.
A preferred cyclic peptide of the present invention is a cyclic peptide of Formula (I), wherein X2 denotes Arg, X4 denotes Met, X6 denotes Ser, X7 denotes Ser, and/or X10 denotes Gly (SEQ ID NO: 2).
Furthermore, in another embodiment of the invention, in the cyclic peptide of the invention, the amino acid sequence expressed by Formula (I) may be selected from SEQ ID NOs: 3-8 and SEQ ID NOs: 16-75.
Furthermore, in the cyclic peptide of the invention, the amino acid sequence expressed by Formula (I) is preferably selected from the amino acid sequences expressed by the Formula (I-a)-Formula (I-e):
wherein, the line connecting two Cys denotes a disulfide bond.
Each of the amino acid sequences expressed by these Formulae (I-a)-(I-e) is the cyclic part of human BNP (Formula (I-a)), swine BNP (Formula (I-b)), rat BNP (Formula (I-c)), rabbit BNP (Formula (I-d)) and murine BNP (Formula (I-e)), respectively. Therefore, the cyclic peptide having such an amino acid sequence will exhibit the aforementioned effects with more certainty. Because swine BNP cyclic peptide is consistent with those of avian (SEQ ID NO: 8,
Cys-Phe-Gly-Arg-Arg-Ile-Asp-Arg-Ile-Gly-Ser-Leu-Ser-Gly-Met-Gly-Cys, wherein, 1st Cys and 17th Cys form a disulfide bond), bovine (SEQ ID NO: 9,
Cys-Phe-Gly-Arg-Arg-Leu-Asp-Arg-Ile-Gly-Ser-Leu-Ser-Gly-Leu-Gly-Cys, wherein, 1st Cys and 17th Cys form a disulfide bond), feline (SEQ ID NO: 10,
Cys-Phe-Gly-Arg-Arg-Leu-Asp-Arg-Ile-Gly-Ser-Leu-Ser-Gly-Leu-Gly-Cys, wherein, 1st Cys and 17th Cys form a disulfide bond), canine (SEQ ID NO: 11,
Cys-Phe-Gly-Arg-Arg-Leu-Asp-Arg-Ile-Gly-Ser-Leu-Ser-Gly-Leu-Gly-Cys, wherein, 1st Cys and 17th Cys form a disulfide bond), and ovine (SEQ ID NO: 12,
Cys-Phe-Gly-Arg-Arg-Leu-Asp-Arg-Ile-Gly-Ser-Leu-Ser-Gly-Leu-Gly-Cys, wherein, 1st Cys and 17th Cys form a disulfide bond), BNP cyclic peptides derived from these organisms also have similar effects as the cyclic peptide of the present invention. Among those mentioned above, it is particularly preferred that the amino acid sequence expressed by Formula (I) is the amino acid sequence expressed by Formula (I-a). In another embodiment of the invention, the cyclic peptide may be expressed by SEQ ID NOs: 16-75.
The cyclic peptide of the present invention encompasses a derivatized form of said cyclic peptide. Such a derivative can be used as such, as an active substance, or also used as a prodrug.
A derivative of the present invention can be obtained by adding (modifying) a known substituent to certain group of an amino acid in the cyclic peptide such as, for example, a hydrogen atom, hydroxyl group, carboxy group, amino group or imino group, or replacing it with a known replaceable substituent. Modification include, but not limited to, chemical modifications such as, for example, glycosylation, acetylation, phosphorylation and lipidation, to an amino acid within the cyclic peptide.
The addition (modification) or replacement of an amino acid within the cyclic peptide can occur in one group, or can occur in more than one group at the same time. Any known substituents can be used as long as being capable of replacing above groups and it goes without saying that such substituents naturally include, for example, protecting groups such as BOC.
The cyclic peptide of the invention further includes a mutated form of said cyclic peptide. Namely, a mutant of the present invention can be obtained by deleting an amino acid in the cyclic peptide, replacing it with or adding it another amino acid. The number of amino acid to be deleted, replaced with other amino acids or added is 4 or less, more preferably 3 or less, even more preferably 2 or less, and particularly preferable 1 or less. It also goes without saying that the deletion, replacement or addition of amino acids in the cyclic peptide may occur concurrently and independently to each other.
An amino acid that is capable of being replaced with another amino acid can be, in the case of human BNP (Formula (I-a)), exemplified as follows, without being limited thereto. The third amino acid from left, Gly, may be replaced with either Val, Ala, Ser or Thr. The forth amino acid from left, Arg, may be replaced with either Gln or His. The fifth amino acid from left, Lys, may be replaced with Arg. The sixth amino acid from left, amino acid, Met, may be replaced with either Leu or Ile. The ninth amino acid from left, Ile, may be replaced with Val. The twelfth amino acid from left, Ser, may be replaced with either Gln, Val, Ala, Thr, Leu, Ile or Met. The thirteenth amino acid from left, Ser, may be replaced with either Val, Ala or Thr. The fourteenth amino acid from left, Gly, may be replaced with Arg. The fifteenth amino acid from left, Leu, may be replaced with either Met, Ile, Val or Ala. The sixteenth amino acid from left, Gly, may be replaced with either Ser or Ala. Table 32 summarizes examples of replaceable amino acids in the cyclic peptide of the invention, though the invention will not be limited thereto.
Cyclic peptides in which one amino acid has been replaced include such as, for example, SEQ ID NOs: 16-44, though the invention will not be limited thereto. Cyclic peptides in which two amino acids have been replaced include such as, for example, SEQ ID NO: 45-58, though the invention will not be limited thereto. Yet cyclic peptides in which three amino acids have been replaced include such as, for example, SEQ ID NOs: 59-70, though the invention will not be limited thereto. Furthermore, cyclic peptides in which four amino acids have been replaced include such as, for example, SEQ ID NOs: 71-75, though the invention will not be limited thereto. It also goes without saying that five or more amino acids can be replaced by appropriately combining the aforementioned amino acid.
Deletion of one to several amino acids can take place in similar manner to the replacement of the aforementioned amino acids with other amino acids.
The number of amino acid which are to be deleted or replaced with other amino acids or added may be determined such that the cyclic peptide will have 80% homology, preferably 90% homology to the cyclic peptide of the invention.
In addition, the present invention may be a mutant as described above, and a derivative thereof. As long as it retains the effect of the invention, any mutant or a derivative thereof is encompassed in the cyclic peptide according to the invention. In another embodiment, it has at least a BNP activity. For purpose of improving the activity of the cyclic peptide of the invention, prolonging the effect of the invention, and/or increasing storage stability of the cyclic peptide of the invention, the cyclic peptide of the invention or the amino acids constituting said peptide may be altered in an appropriate manner. For example, an amino acid in the cyclic peptide of the invention may be chemically modified, some amino acids constituting the cyclic peptide may be deleted or replaced with other amino acids, and/or new amino acids may be added.
For example, the C-terminal group —COOH of one Cys of the cyclic peptide may be replaced with —COOR1, —CONHR1 or —CONR12, and/or the N-terminal group NH2 of the other Cys of the cyclic peptide may be replaced with —NHC(O))R1 or —N(C(O)R1)2. Here, each appearance of R1 is independently a branched or straight hydrocarbon group or an alkylene glycol chain or sugar chain having 1 to 20 carbon atoms. The number of carbon atoms in R1 is preferably 1 to 10, more preferably 1 to 5, yet more preferably 1 to 2.
Pharmaceutically acceptable salts include, without being particularly limited, as the cyclic peptide of the invention or a derivative, such as for example, a salt with an inorganic base, a salt formed with an organic base, a salt formed with an inorganic acid, a salt formed with an organic acid, a salt formed with a basic or acidic amino acid. Examples of suitable salt formed with inorganic base include such as, for example, an alkaline metal salt such as a sodium salt and potassium salt; an alkaline earth meal salt such as a calcium salt and magnesium salt; and an aluminum salt and ammonium salt. Examples of suitable salt formed with organic base include such as, for example, a salt with an alkyl amine such as trimethyl amine or triethyl amine; a salt formed with a heterocyclic amine such as pyridine and picoline; a salt formed with an alkanol amine such as ethanol amine, diethanol amine and triethanol amine; a salt formed with a cycloalkyl amine such as cyclohexyl amine and dicyclohexyl amine; a salt formed with an alkylene diamine derivative such as N,N′-dibenzylethylenediamine. Examples of suitable salt formed with inorganic acid include such as, for example, a salt formed with hydrochloric acid, hydrobromic acid, nitric acid, sulfuric acid or phosphoric acid. Examples of suitable salt formed with organic acid include such as, for example, a salt formed with a monocarboxylic acid such as formic acid, acetic acid, trifluoroacetic acid and propionic acid; a salt formed with a polyvalent carboxylic acid such as fumaric acid, oxalic acid and maleic acid; a salt formed with a oxycarboxylic acid such as tartaric acid, citric acid, succinic acid and malic acid; a salt formed with a sulfonic acid such as methane sulfonic acid, benzezne sulfonic acid and p-toluene sulfonic acid; and a salt formed with benzoic acid. Examples of suitable salt formed with a neutral amino acid include such as, for example, a salt formed with glycine, valine or leucine; examples of suitable salt formed with a basic amino acid include such as, for example, a salt formed with arginine, lysine or ornithine; and examples of suitable salt formed with an acidic amino acid include such as, for example, a salt formed with aspartic acid acid or glutamic acid.
Among those mentioned above, a cyclic peptide composed of the amino acid sequence expressed by Formula (I) or a pharmaceutically acceptable salt is preferred. Namely, it is preferred that the amino acid sequence expressed by Formula (I) is not replaced.
A method for producing the cyclic peptide of the present invention, a derivative and pharmaceutically acceptable salt thereof may employ, without being particularly limited, for example, any known chemical synthetic or genetic engineering methods.
When the amino acid sequence as above is chemically synthesized, it may be synthesized by any chemical synthetic method, or any known method for peptide synthesis, for example, or solid-phase or liquid-phase synthetic method. Moreover, any commercial synthesizer (e.g., SHIMADZU Corporation: PSSM-8) may be used for synthesis.
A disulfide bond can be formed in the amino acid sequence, for example, by DMSO oxidation method or iodine oxidation method without being particularly limited. In this case, an intramolecular disulfide bond can be formed by treating a free sulfhydryl group or a sulfhydryl group protected by a protecting group with either DMSO or iodine (I2) to result in said cyclic peptide.
A protecting group includes such as, for example, 4-methylbenzyl group (Bzl (4Me)), trityl group (Trt), tert-butyl group, N-(acetyl) aminomethyl group (Acm). Deprotection can be carried out through appropriate treatment corresponding to these protecting group, for example, for 4-methylbenzyl group by treating with a strong acid, and for N-(acetyl) aminomethyl group by treating with iodine.
Next, if necessary, the cyclic peptide is derivatized to result in a derivative. Derivatization can be carried out by known method. Alternatively, a derivative of the cyclic peptide can be produced at the time of peptide synthesis by introducing in advance a substituent into the amino acid constituting the cyclic peptide.
Then, if necessary, a pharmaceutically acceptable salt is produced by ion exchange of the cyclic peptide or derivative thereof. Ion exchange can be carried out, for example, by bringing into the contact the cyclic peptide or derivative thereof with a desired acid or base.
On the other hand, when the peptide is synthesized by genetic engineering, it can be synthesized by any known method such as, for example, methods described in Sambrook J. et al., Molecular Cloning, A Laboratory Manual (4th edition) (Cold Spring Harbor Laboratory Press (2012)). For instance, a DNA fragment coding for the amino acid sequence expressed by Formula (I) is prepared at first. Preparation of the DNA fragment can be performed, for example, if it is a case in which the DNA fragment codes for the amino acid sequence expressed by Formula (I-a), by amplifying the DNA fragment by PCR using a vector comprising a full-length human BNP gene as template and primers designed to synthesize a defined DNA region. Alternatively, a DNA fragment can be chemically synthesized.
Then, the amplified DNA fragment is ligated into an appropriate vector to obtain a recombinant vector for protein expression. Next, the vector for protein expression is allowed to be taken up by target cells and the transformed cells are selected. Finally, the protein produced by the cells (i.e., the protein composed of the amino acid sequence expressed by Formula (I)) is collected.
Formation of disulfide bond, derivatization and salt formation in the collected protein can be carried out as described above.
The identification of the compound of interest such as a cyclic peptide can be confirmed by known procedures such as, for example, reverse-phase HPLC or mass spectroscopy.
The presence or absence of BNP activity in the obtained compound can readily be confirmed by known means. For instance, it can be confirmed by examining cGMP producing activity in NPR-A receptor-expressing cells.
2. External Preparation
Secondly, the external preparation of the present invention is explained.
The external preparation of the present invention comprises one or more cyclic peptide and/or a derivative thereof and/or a pharmaceutically acceptable salt thereof as described above. If two or more cyclic peptides are used, the number of different cyclic peptide to be mixed is not limited, though 2 to 3 are preferred in terms of preparation cost and convenience. It includes SEQ ID NO: 19, 29, 33, 36, 39 and 43, for example, but the invention is not limited to these and these cyclic peptide can appropriately be combined as long as it does not interfere the effect of the invention.
2.1 Application
The external preparation of the present invention can be used for following uses, for example, without being particularly limited, and in each case exerts remarkable effect which had not previously been achieved. The external preparation of the present invention is not limited to any particular use, and can be used as a pharmaceutical product, a quasi-drug and/or a cosmetic product depending on its drug efficacy and effect.
Hereinbelow, the invention will be described in detail for each of its use.
(1) Therapeutic/Prophylactic for Dermatitis
The external preparation of the present invention can be a a therapeutic and/or prophylactic for dermatitis.
The external preparation of the present invention can, upon being applied onto the subject's skin or mucosa suffering dermatitis, quickly relieve or eliminate various perceptible symptoms and conditions that are or can be caused by dermatitis such as pruritus, soreness (pain), hot sensation, tautness, erythema, infiltration, papule, lichenification, crust, exudation or skin desiccation, improving the symptoms of dermatitis. In addition, the external preparation of the present invention does not cause any irritation at the site of application.
Furthermore, such action of the external preparation comprising the cyclic peptide of the invention is effected more quickly and for prolonged time period as compared to that of an external preparation comprising BNP having the tail part. Although reasons for these advantageous effects of the cyclic peptide over such BNP are not clear, the cyclic peptide of the invention is considered to have an advantageous structure for binding to its receptor (NPR-A receptor) over BNP, thereby enabling faster binding to the NPR-A receptor in the vicinity of the affected site and at the same time prolonging its binding time. Moreover, it is considered that its relatively quick binding to the NPR-A receptor near the affected site can prevents the cyclic peptide from diffusing out of the affected site via bloodstream, etc., enabling it to stay around the affected site for relatively long time.
The external preparation of the present invention doese not only suppress or prevent inflammation in dermatitis but also acts to restore and/or retain the barrier function of skin. Here, skin's barrier function works for protecting skin against entry of stimuli and saprophytes from external environment or for retaining moisture. The external preparation restores the barrier function, and thus able to prevent the progress or exacerbation of inflammation. The barrier function of skin is greatly affected by the alignment state of corneocytes in the corneum, i.e., state of skin texture and moisturization. The external preparation of the present invention acts to improve skin texture and to moisturize skin. Therefore, its effects of restoring and maintaining skin barrier function are also obvious.
The external preparation of the present invention is also effective on skin symptoms commonly called acne, i.e., such as comedones, red papule, pustula, cysts/tuberosity.
Moreover, a quick relief or elimination of perceptible symptoms or conditions will reduce the burden of the subject (patient) and improve the QOL of the patient, while preventing the patient from being bothered by itch or soreness and from acting to damage the affected site, for example, touching or scratching. This effect of the external preparation of the present invention to relieve or eliminate perceptible symptoms or conditions is, in general, exhibited within 10 minutes, preferably within 5 minutes, more preferably within 3 minutes after application.
In addition, the external preparation of the present invention can treat dermatitis in which steroid dermatosis has been developed, or dermatitis that is intractable by other common drugs for dermatitis therapy such as steroid and tacrolimus, for example dermatitis for which a sufficient therapeutic effect cannot be achieved by these formulations, or dermatitis which is resistant to these formulations, or dermatitis for which the use of these formulations is not suitable or desirable. Conventional widely-used steroid external preparations have significant problems upon terminating application that the severity returns to the pre-application level and that a rebound phenomenon may occur and exacerbate the condition. The external preparation of the present invention has no such problems as a rebound phenomenon.
Dermatitis is in general a disease which causes inflammation in skin or mucosa. Dermatitis is normally accompanied with one or more symptoms selected from acute eczema symptoms such as erythema, infiltrative erythema, papule, vesicle, pustula, infiltration, incrustation and desquamation; chronic eczema symptoms such as lichenification and pigmentation; and scales, crust (scab) attachment, scratching, scratch scar, prurigo nodularis, erosion, edema, oozing and squamatization.
Dermatitis herein is not particularly limited as long as it is a disease which is accompanied with inflammation in skin or mucosa and includes such as, for example, eczema and atopic dermatitis such as chronic eczema, dyshidrotic eczema, infantile xerotic eczema; contact dermatitis such as allergic contact dermatitis and primary irritant contact dermatitis; seborrheic dermatitis; asteatotic dermatitis; autosensitization dermatitis; stasis dermatitis; urticaria such as allergic urticaria (e.g., alimentary urticaria and drug-induced urticaria) and nonallergic urticaria (e.g., physical urticaria, solar urticaria and cholinergic urticaria); insect bite; drug eruption; psoriasis such as plaque psoriasis, guttate psoriasis, erythrodermic psoriasis, pustular psoriasis and psoriasis arthropathica; prurigo such as chronic prurigo, acute prurigo, gestational prurigo and nodular prurigo; rosacea; rosacea-like dermatitis; cutaneous vasculitis such as cutaneous allergic vasculitis; cutaneous pruritus such as systemic cutaneous pruritus, localized cutaneous pruritus, senile cutaneous pruritus and gestational pruritus; solar dermatitis; erythrosis; nummular dermatitis; localized scratching dermatitis; perioral dermatitis; pompholyx; keratosis pilaris; lichen planus, dyshidrotic eczema, dyshidrosis, miliaria and acne vulgarisacne vulgaris. The external preparation of the present invention can be applied to the therapy and prophylaxis of any of these diseases.
The external preparation of the present invention exerts an excellent effect especially on eczema, atopic dermatitis, contact dermatitis, seborrheic dermatitis, insect bite, allergic or nonallergic urticaria and psoriasis, preferably on eczema, atopic dermatitis, contact dermatitis and insect bite, more preferably on eczema and atopic dermatitis. Therefore, the external preparation of the present invention can be used for the purpose of the therapy and prophylaxis of at least one or more dermatitis selected from above-mentioned group.
(2) Ingredients of Cosmetic or Skin-Care Product
The external preparation of the present invention may be an ingredient for a cosmetic or skin-care product.
The external preparation of the present invention will, upon being applied to skin and/or mucosa, provide moisture to the applied site and exert moisturizing effect, preventing skin from dryness and roughness. In cases where corneum is present at the site of application, it exerts an effect of improving skin texture there. It also provides and retains moderate elasticity and flexibility of skin and mucosa, softens skin, gives skin and mucosa resilience and firmness. Moreover, it improves wrinkles (including fine and large wrinkles) and flabbiness at the applied site, and further diminishes the appearance of dullness and spots. By diminishing dullness and spots away, it consequently provides a skin-lightening effect.
As a result, the external preparation of the present invention can be used for the purpose of maintaining or improving skin and/or mucosal condition, without being particularly limited, for example, for obtaining at least one effects selected from a group consisting of preventing or improving dry skin, skin roughness, sensitive skin, roughened lips and appearance of large and fine wrinkles, maintaining skin or mucosal condition, anti-aging, and skin-lightening, or obtaining for at least one effects selected from the above effects.
Skin roughness herein includes miliaria, chilblain, cracked skin, chapped skin, acne, diaper rashes, festering, chafed inner thighs and razor burns.
Specific utilities of the external preparation of the present invention as an ingredient for the cosmetic or skin-care product includes, without being particularly limited, for example, cosmetics for make-up such as face lotion, emulsion, serum, cream, cold cream, gel, mask, pack, powder, hand soap, perfume, deodorant, as well as foundation, face powder, eye shadow, eyeliner, mascara, eyebrow, blush, makeup base, lip stick, lip cream and nail polish, and furthermore cosmetics for hair such as shampoo, rinse, conditioner, hair color, hair tonic, styling agent and perm chemical, body cleansers such as face wash, cleansing and body soap, skin-care products such as body powder, after-shave lotion and pre-shave lotion, and bath agents.
The above effects of the external preparation of the present invention are quickly exhibited, within 10 minutes in general, preferably within 5 minutes, more preferably within 3 minutes after application depending on the type of the effect.
The above effects of the external preparation of the present invention last for relatively long time. In general, the effect lasts for 4 hours or more, preferably, 8 hours or more, more preferably 24 hours or more after it started to effect depending on the type of the effect.
(3) Antipruritic
The external preparation of the present invention can be an antipruritic.
As mentioned above, the external preparation of the present invention is suitable for using as antipruritic because it quickly exerts an excellent antipruritic effect at the applied site when being applied to skin or mucosa.
The antipruritic effect of the external preparation of the present invention as mentioned above is exhibited within 10 minutes in general, preferably within 5 minutes, more preferably within 3 minutes after application.
(4) Alopecia Therapeutic, Alopecia Prophylactic, Hair Growing Agent and Hair Growth Stimulant
The external preparation of the present invention can also be an alopecia therapeutic, alopecia prophylactic, hair growing agent and/or hair growth stimulant.
When the external preparation of the present invention is applied to a site of hair loss or a site where hair growth is to be stimulated, it acts to prevent hair loss and promote hair growth stimulation and hair growing at the applied site. It has effects such as nourishing hair, promoting hair growth, and improving or preventing hair thinning at the applied site. In this case, hairs to be stimulated to grow tend to become terminal hairs or hairs which are not white hairs. These effects are exhibited in relatively early stage as compared to other active ingredients previously used in alopecia therapeutics e.g., BNP, and the effects obtained are significant.
The external preparation of the present invention also has an improving or preventing effect on dermatitis as mentioned above. Therefore, it can improve or prevent skin inflammation associated with alopecia. Such effects are particularly advantageous when alopecia has been exacerbated due to skin condition of the site of application (such as scalp).
Moreover, the external preparation of the present invention exerts moisturizing and skin texture-improving effects at the applied site when being applied to skin as mentioned above. It can remove and suppress dandruff and itching, while giving moisture to hair and scalp, improving and preventing dryness and keeping hair and scalp healthy. It also can improve seborrhea.
The external preparation of the present invention also acts to alleviate or eliminate the perceptible symptoms or conditions as mentioned above, thereby reducing the burden of the subject (patient) and improving QOL of the patient. Moreover, it can prevent the patient from being bothered by itch or soreness and acting to damage the affected site, for example, touching or scratching, thereby preventing exacerbation of skin condition which may induce alopecia.
When the external preparation of the present invention is used as alopecia therapeutic or prophylactic, applicable alopecia includes such as, for example, alopecia as listed below, without being particularly limited. The external preparation can be used for the purpose of treating or preventing one ore more of these alopecia.
(Acquired Alopecia)
(i) Alopecia without accompanying scarring or skin lesion (alopecia areata, male pattern alopecia, seborrheic alopecia, alopecia pityroides, female pattern alopecia, gestational alopecia, malignant alopecia, senile alopecia, alopecia totalis, alopecia areata multilocularis, ophiasis, drug-induced alopecia, cancer chemotherapy-induced alopecia and radiation exposure-induced alopecia, traumatic/mechanical alopecia, malnutrition/metabolic disorder associated alopecia, endocrine dysfunction associated alopecia and telogen effluvium (post partum alopecia, alopecia after high fever)).
(ii) Alopecia observed on skin lesion or pathologic skin (infection-induced alopecia, tumor-induced alopecia, inflammation-induced alopecia)
(iii) Scarring alopecia (skin infection-induced alopecia, alopecia induced by infiltration of inflammatory cells)
(Congenital Alopecia)
Diffuse alopecia, congenital atrichia, alopecia in hereditary syndromes, localized alopecia, phakomatosis, aplasia cutis, congenital alopecia triangularis.
Among those mentioned above, the external preparation of the present invention exerts an excellent effect particularly on acquired alopecia, preferably on alopecia without accompanying scarring or skin lesion, more preferably on alopecia areata, male pattern alopecia, seborrheic alopecia, alopecia pityroides, female pattern alopecia, gestational alopecia, malignant alopecia, senile alopecia, alopecia totalis, alopecia areata multilocularis, ophiasis, drug-induced alopecia, cancer chemotherapy-induced alopecia and radiation exposure-induced alopecia, traumatic/mechanical alopecia, malnutrition/metabolic disorder associated alopecia, endocrine dysfunction associated alopecia and telogen effluvium. Therefore, the external preparation of the present invention can be used for the purpose of treating or preventing at least one or more alopecia selected from the above-mentioned group.
(5) Rhinitis Therapeutic and/or Prophylactic
The external preparation of the present invention can also be a rhinitis therapeutic and/or prophylactic.
Rhinitis is a disease caused by mucosal inflammation in nasal cavity and/or paranasal cavity and induces main symptoms such as nasal obstruction, rhinorrhea, sudden recurrent sneezing, as well as symptoms such as pruritus. In the present invention, “rhinitis” does not only includes rhinitis in a narrow definition which are accompanied with mucosal inflammation in nasal cavity, but also includes sinusitis accompanied with mucosal inflammation in paranasal cavity.
The external preparation of the present invention can improve or prevent various symptoms associated with rhinitis such as nasal obstruction, rhinorrhea, sneezing and pruritus, when being applied to nasal cavity mucosa and/or paranasal cavity mucosa. Especially these effects are exhibited quickly and last for a prolonged time as compared to a rhinitis therapeutic comprising BNP having the tail part.
Such effects of the external preparation of the present invention on rhinitis are exhibited within 8 minutes in general, preferably within 5 minutes, more preferably within 3 minutes after its application.
Also the effect of the external preparation of the present invention on rhinitis as described above lasts for 4 hours or more in general, preferably for 8 hours or more, more preferably for 24 hours or more after it started to effect.
When the external preparation of the present invention is used as a rhinitis therapeutic and/or prophylactic, applicable rhinitis includes such as, without being particularly limited, for example, infectious rhinitis including acute rhinitis and chronic rhinitis; hypersensitive non-infectious rhinitis including combined (flower hypersensitivity) rhinitis, rhinitis with rhinorrhea, congestive rhinitis, edematous rhinitis and dry-nose type rhinitis; irritant-induced rhinitis including physical rhinitis, chemical rhinitis and radiation rhinitis; and atrophic rhinitis and idiopathic granulomatous rhinitis; and sinusitis such as acute sinusitis, chronic sinusitis (maxillary empyema), eosinophilic sinusitis and paranasal cavity mycosis, The external preparation can be used for the purpose of treating or preventing one ore more of the above.
Combined rhinitis includes, for example, allergic rhinitis including perennial allergic rhinitis and seasonal allergic rhinitis, and nonallergic rhinitis including vasomotor (essential) rhinitis and eosinophilic rhinitis.
Rhinitis with rhinorrhea includes, for example, gustatory rhinitis, cold air-induced rhinitis and senile rhinitis.
Congestive rhinitis includes, for example, drug-induced rhinitis, psychogenic rhinitis, gestational rhinitis, endocrine rhinitis and cold rhinitis.
Edematous rhinitis includes, for example, aspirin-hypersensitive rhinitis.
Among those mentioned above, the external preparation of the present invention exerts an excellent effect particularly on hypersensitive non-infectious rhinitis, irritant-induced rhinitis and sinusitis, preferably on hypersensitive non-infectious rhinitis and chronic sinusitis, more preferably on combined (flower hypersensitivity) rhinitis, rhinitis with rhinorrhea, congestive rhinitis, edematous rhinitis and dry-nose type rhinitis, chronic sinusitis. Therefore, the external preparation of the present invention can be used for the purpose of treating or preventing at least one or more rhinitis selected from the above-mentioned group.
In terms of symptoms, since the external preparation of the present invention acts as described above, it can be used for any of rhinitis with sneezing/rhinorrhea, rhinitis with nasal obstruction and rhinitis with both symptoms.
In addition, the external preparation of the present invention exhibits an effect of improving rhinitis which cannot be cured by a rhinitis therapeutic that has conventionally been used such as steroid drug.
(6) Other External Preparations
The external preparation of the present invention can also be used for an application other than those described above for the effect of the cyclic peptide as described above. In this case, the external preparation of the present invention can set an objective that is not the effects of the cyclic peptide as described above. In this case, the cyclic peptide of the invention, a derivative and/or a pharmaceutically acceptable salt thereof is used for the purpose of assisting the main effect of the external preparation or adding another effect to the main effect.
Such application include such as, without being particularly limited, for example, body powder, deodorant, depilation agent, soap, body shampoo, bath agent, hand soap, perfume, sunscreen, and antiinflammatory agent and antifungal agent.
2.2 Formulation
The external preparation of the present invention can exert the effect of its active ingredient, i.e., the cyclic peptide or a derivative and/or pharmaceutically acceptable salt thereof, certainly and quickly in the vicinity of the applied site by being locally applied to the site of the interest (e.g., affected site) on skin or mucosa.
Such external preparation can be, without being particularly limited, for example, an agent for integument, eye drop, ear drop, nasal drop, buccal agent or suppository. Among these, when the external preparation of the present invention is a dermatitis therapeutic, a dermatitis prophylactic, an antipruritic, a skin-care product, an alopecia therapeutic, an alopecia prophylactic, a hair growing agent or a hair growth stimulant, it is preferably an agent for integument. On the other hand, when the external preparation of the present invention is a rhinitis therapeutic and/or prophylactic, it is preferably a nasal drop. Furthermore, when it is a therapeutic/prophylactic of a corneal disease, it is preferably an eye drop.
When the external preparation of the present invention is an agent for integument, it can be, without being particularly limited, for example, an external solid formulation, an external liquid formulation, a spray formulation, an ointment, an emulsion, a cream, a gel formulation or a patch.
An external solid formulation is a solid formulation for applying or spraying onto such as skin Such an external solid formulation includes, for example, a powder form external formulation.
An external liquid formulation is a liquid formulation for applying onto such as skin Such an external liquid formulation includes, for example, a lotion and liniment.
A spray formulation is a formulation for spraying an active ingredient in a mist, powder, foam or paste form onto skin. Such spray formulation includes, for example, an external aerosol and a pump spray formulation.
An ointment is a semi-solid formulation which is applied to skin and comprises an active ingredient dissolved or dispersed in a base. The ointment can also be a lip cream for locally applying to lips, etc.
A cream is a semi-solid formulation which is applied to skin and emulsified as either oil-in-water or water-in-oil type.
A gel formulation is a gelled formulation which is applied to skin. The gel formulation includes, for example, aqueous gel formulation and oil-based gel formulation.
A patch is a formulation which is attached to skin. The patch includes, for example, a tape or plaster.
A nasal drop is a formulation which is administered to nasal cavity or nasal mucosa. The nasal drop includes, for example, nasal powder formulation and a nasal drop. Among these, nasal drop is preferred.
In any formulation described above, the external preparation of the present invention comprises the cyclic peptide of the present invention and/or a derivative thereof and/or a pharmaceutically acceptable salt thereof as described above.
When the formulation is an external liquid formulation, an ointment, a cream or a gel formulation, the external preparation of the present invention comprises the cyclic peptide and/or a derivative thereof and/or a pharmaceutically acceptable salt thereof at a concentration of, for example, 0.0001 to 1000000 μg/g, preferably 0.001 to 10000 μg/g, more preferably 0.01 to 1000 μg/g, yet more preferably 0.1 to 100 μg/g. In another embodiment, it may comprises the cyclic peptide at a concentration of 1 to 800 μg/g or 3 to 500 μg/g.
When the formulation is a spray formulation, the external preparation of the present invention comprises in the stock solution of the spray formulation the cyclic peptide and/or a derivative thereof and/or a pharmaceutically acceptable salt thereof at a concentration of, for example, 0.0001 to 1000000 μg/mL, preferably 0.001 to 10000 μg/mL, 0.01 to 1000 μg/mL, more preferably 0.1 to 100 μg/mL, yet more preferably 1 to 100 μg/mL. In another embodiment, it may comprises the cyclic peptide at a concentration of 1 to 800 μg/mL or 3 to 500 μg/mL.
When the formulation is a patch, the external preparation of the present invention comprises the cyclic peptide and/or a derivative thereof and/or a pharmaceutically acceptable salt thereof at a concentration of, for example, 0.0001 to 1000000 μg/mL, preferably 0.001 to 10000 μg/mL, more preferably 0.01 to 1000 μg/mL, yet more preferably 0.1 to 100 μg/mL, particularly preferably 1 to 100 μg/mL. In another embodiment, it may comprises the cyclic peptide at a concentration of 1 to 800 μg/mL or 3 to 500 μg/mL.
When the formulation is a nasal drop, especially a liquid nasal drop, the external preparation of the present invention comprises in the nasal drop solution (nasal drop) the cyclic peptide and/or a derivative thereof and/or a pharmaceutically acceptable salt thereof at a concentration of, for example, 0.0001 to 1000000 μg/mL, preferably 0.001 to 10000 μg/mL, more preferably 0.01 to 1000 μg/mL, yet more preferably 0.1 to 100 μg/mL, particularly preferably 1 to 100 μg/mL. In another embodiment, it may comprises the cyclic peptide at a concentration of 1 to 800 μg/mL or 3 to 500 μg/mL.
The external preparation of the present invention can be formulated, for any formulation as described above, by using methods and constituent materials known to those skilled in the art.
Available constituent materials include such as, without being particularly limited, for example, a gelator, oily ingredient, higher alcohol, fatty acid, ultraviolet absorbing agent, ultraviolet scattering agent, powder, pigment, surfactant, polyhydric alcohol/sugar, polymer, bioactive ingredient, solvent, antioxidant, flavor and antiseptic agent.
Various organic or inorganic gelator compounds can be used.
An inorganic gelator compound includes such as, for example, hydrous or water-absorbable silicate, for example, aluminum silicate (e.g., bentonite), magnesium-aluminum silicate and colloidal silica.
As an organic gelator compound, a natural, semisynthetic or synthetic polymer can be used. natural and semisynthetic polymers include such as, for example, polysaccharides such as cellulose, starch, tragacanth, gum arabic, xanthane gum, agar, gelatin, alginic acid and a salt thereof (e.g., sodium alginate and a derivative thereof), lower alkylcellulose (e.g., methylcellulose or ethylcellulose), carboxy- or hydroxy-lower alkylcellulose (e.g., carboxymethylcellulose or hydroxypropylcellulose). A synthetic polymer includes such as, for example, carboxylvinyl polymer, sodium polyacrylate, (vinylmethyl ether/ethyl maleate) copolymer, polymethacrylate, polyvinyl alcohol, polyvinylpyrrolidone, polyacrylate or polymethacrylate. Alternatively, as a gel formulation, commercially available gelators such as, for example, Lubrajel® NP, Lubrajel® CG, Lubrajel® DV, Lubrajel® MS, Lubrajel® OIL, Lubrajel® TW, Lubrajel® DS (Ashland Inc.) can also be used.
As an oily ingredient, for example, various ester, ether, hydrocarbon, silicone and fluorine oil phase ingredient, as well as animal and plant oils and a hardened oil thereof, and waxes of natural origin.
The ester oil phase ingredients include such as, for example, glyceryl tri(2-ethyl hexanoate), cetyl 2-ethylhexanoate, isopropyl myristate, butyl myristate, isopropyl palmitate, ethyl stearate, octyl palmitate, isocetyl isostearate, butyl stearate, butyl myristate, ethyl linoleate, isopropyl linoleate, ethyl oleate, isocetyl myristate, isostearyl myristate, isostearyl palmitate, octyldocecyl myristate, isocetyl isostearate, diethyl sebacate, diisopropyl adipate, isoalkyl neopentanoate, glyceryl tri(capryl-caprinate), trimethylol propane tri(2-ethylhexanoate), trimethylol propane triisostearate, pentaerythritol tetra(2-ethylhexaonate), cetyl caprylate, decyl laurate, hexyl laurate, decyl myristate, myristyl myristate, cetyl myristate, stearyl stearate, decyl oleate, cetyl ricinoleate, isocetyl myristate, isostearyl myristate, isocetyl palmitate, isostearyl palmitate, octyl stearate, isocetyl stearate, isodecyl oleate, octyldodecyl oleate, octyldodecyl linoleate, isopropyl isostearate, cetostearyl 2-ethylhexanoate, stearyl 2-ethylhexanoate, hexyl isostearate, ethylene glycol dioctanoate, ethylene glycol dioleate, propylene glycol dicaprinate, propylene glycol di(capryl-caprinate), propylene glycol dicaprylate, neopentyl glycol dicaprinate, neopentyl glycol dioctanoate, glyceryl tricaprylate, glyceryl triundecanoate, glyceryl triisopalmitate, glyceryl triisostearate, octyldodecyl neopentanoate, isostearyl octanoate, octyl isononanoate, hexyldecyl neodecanoate, octyldodecyl neodecanoate, isocetyl isostearate, isostearyl isostearate, octyldecyl isostearate, polyglycerol oleic acid ester, polyglycerol isostearic acid ester, dipropyl carbonate, dialkyl (C12-18) carbonate, triisocetyl citrate, triisoalkyl citrate, triisooctyl citrate, lauryl lactate, myristyl lactate, cetyl lactate, octyldecyl lactate, triethyl citrate, acetyltriethyl citrate, acetyltributyl citrate, trioctyl citrate, diisostearyl malate, 2-ethylhexyl hydroxystearate, di(2-ethylhexyl) succinate, diisobutyl adipate, diisopropyl sebacate, dioctyl sebacate, cholesteryl stearate, cholesteryl isostearate, cholesteryl hydroxystearate, cholesteryl oleate, dihydrocholesteryl oleate, phytosteryl isostearate, phytosteryl oleate, isocetyl 12-stearoylhydroxystearate, stearyl 12-stearoylhydroxystearate and isostearyl 12-stearoylhydroxystearate.
Hydrocarbon oil phase ingredients include such as, for example, squalane, liquid paraffin, α-olefin oligomer, isoparaffin, ceresin, paraffin, liquid isoparaffin, solid paraffin, polybutene, microcrystalline wax and vaseline.
Silicone oil phase ingredients include such as, for example, dimethylpolysiloxane, methylphenylpolysiloxane, methylcyclopolysiloxane, octamethylpolysiloxane, dacamethylpolysiloxane, dodecamethylcyclosiloxane, methyl hydrogen polysiloxane, polyether-denatured organo(polysiloxane), dimethylsiloxane-methylcetyloxysiloxane copolymer, dimethylsiloxane/methylstearoxysiloxane copolymer, alkyl-denatured organo(polysiloxane), terminal-denatured organo(polysiloxane), amino-denatured silicone oil, amino-denatured organo(polysiloxane), dimethiconol, silicone gel, acryl silicone, trimethyl siloxysilicate, silicone RTV gum.
Fluorine oil phase ingredients include such as, for example, perfluoropolyether, fluorine-denatured organo(polysiloxane), pitch fluoride, fluorocarbon, fluoroalcohol and fluoroalkyl-polyoxyalkylene co-denatured organo(polysiloxane).
Animal and plant oils and a hardened oil thereof, and waxes of natural origin include such as, for example, animal and plant oils and the hardened oil thereof such as beef tallow, hardened beef tallow, lard, hardened lard, horse oil, mink oil, orange roughy oil, fish oil, hardened fish oil, egg yolk, jojoba oil; plant oils and a hardened oil thereof such as avocado oil, almond oil, olive oil, cacao butter, apricot kernel oil, kukui nut oil, sesame oil, wheat germ oil, rice germ oil, rice bran oil, safflower oil, shea butter, soybean oil, evening primrose oil, camellia oil, corn oil, rapeseed oil, hardened rapeseed oil, palm kernel oil, hardened palm kernel oil, palm oil, hardened palm oil, peanut oil, hardened peanut oil, castor oil, hardened castor oil, sunflower oil, grape seed oil, jojoba oil, hardened jojoba oil, macadamia nut oil, meadowfoam oil, cottonseed oil, hardened cottonseed oil, palm oil, hardened palm oil, rose hip oil; waxes such as beeswax, beeswax having high acid value, lanolin, reduced lanolin, hardened lanolin, liquid lanolin, carnauba wax and montan wax.
Higher alcohols include such as, for example, lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, isostearyl alcohol, oleyl alcohol, behenyl alcohol, 2-ethyl hexanol, hexadecyl alcohol, octyl dodecanol.
Fatty acids include such as, for example, caprylic acid, capric acid, undecylenic acid, lauric acid, myristic acid, palmitic acid, palmitoleic acid, stearic acid, isostearic acid, oleic acid, linoleic acid, linolenic acid, arachic acid, arachidonic acid, behenic acid, erucic acid, 2-ethyl hexanoic acid.
Ultraviolet absorbing agents include such as, for example, paraminobenzoate, amyl paraminobenzoate, ethyl dihydroxypropyl paraminobenzoate, glyceryl paraminobenzoate, ethyl paraminobenzoate, octyl paraminobenzoate, octyl dimethyl paraminobenzoate, ethylene glycol salicylate, octyl salicylate, triethanol aminesalicylate, phenyl salicylate, butyl phenyl salicylate, benzyl salicylate, menthyl salicylate, benzyl cinnamate, octyl paramethoxy cinnamate, 2-ethylhexyl paramethoxy cinnamate, glyceryl diparamethoxy cinnamate mono(2-ethylhexanoate), isopropyl paramethoxy cinnamate, paramethoxyhydrocinnamate diethanol amine salt, diisopropyl-disopropyl cinnamate ester mixture, urocanate, urocanate ethyl, hydroxymethoxy benzophenone, hydroxymethoxy benzophenone sulfonate and a salt thereof, dihydroxymethoxybenzophenone, sodium dihydroxymethoxybenzophenone sulfonate, dihydroxybenzophenone, dihydroxy dimethoxybenzophenone, hydroxyoctoxybenzophenone, tetrahydroxybenzophenone, butyl methoxy-dibenzoyl methan, 2,4,6-trianilino-p-(carbo-2-ethylhexyl-1-oxy)-1,3,5-triazine, 2-(2-hydroxy-5-methylphenyl) benzotriazole, methyl-O-aminobenzoate, 2-ethylhexyl-2-cyano-3,3-diphenyl acrylate, phenylbenzimidazole sulfate, 3-(4-methyl benzylidene) camphor, isopropyl dibenzoylmethan, 4-(3,4-dimethoxyphenylmethylene)-2,5-dioxo-1-imidazolidine propionate 2-ethylhexyl, and polymer derivatives or silane derivative thereof, titanium oxide and zinc oxide and dispersion thereof. The zinc oxide and titanium oxide may be surface-treated.
Dermal absorption auxiliary agents include such as, for example, acetic acid, sodium acetate, limonene, menthol, salicylic acid, hyaluronic acid, oleic acid, N,N-diethyl-m-toluamide (N,N-diethyl-3-methyl benzamide), n-butyl stearate, benzyl alcohol, isopropyl myristate, isopropyl palmitate, polypropylene glycol, crotamiton, diethyl sebacate, N-methylpyrrolidone, N-ethylpyrrolidone and lauryl alcohol.
Powders and pigments include such as, for example, pigments such as Pigment Red 104, Pigment Red 201, Pigment Yellow 4, Pigment Blue 1, Pigment Black 401, basic dyes, HC colors, disperse dyes, direct colors, lake pigments such as Pigment Yellow 4 AL lake, Pigment Yellow 203 BA lake; polymers such as nylon powder, silk powder, urethane powder, silicone powder, methyl polymethacrylate powder, cellulose powder, starch, silicone elastomer spherical powder and polyethylene powder; colored pigments such as yellow iron oxide, red iron oxide, black iron oxide, chromic oxide, carbon black, ultramarine, iron blue; white pigments such zinc oxide, titanium oxide, cerium oxide; extender pigment such as tare, mica, sericite, kaolin and tabular barium sulfate; pearl pigment such as titanium mica; metal salt such as barium sulfate, calcium carbonate, magnesium carbonate, aluminum silicate and magnesium silicate; inorganic powder such as silica, alumina; metal soap such as aluminum stearate, magnesium stearate, zinc palmitate, zinc myristate, magnesium myristate, zinc laurate, zinc undecylenate; bentonite, smectite, boron nitride, etc. The shape (spherical, rod-like, needle-like, tabular, amorphous, scaly, spindle-shaped) and particle diameter of these powders are not particularly limited.
These powders and pigments may be pre-treated by known conventional surface processing such as, for example, fluorine compound processing, silicone processing, silicone resin processing, pendant processing, processing with silane coupling agent, processing with titanium coupling agent, oil solution processing, N-acylated lysine processing, polyacrylic acid processing, metal soap processing, amino acid processing, lecithin processing, inorganic compound processing, plasma processing and mechanochemical processing.
As the surfactant, any of an anionic surfactant, a cationic surfactant, ampholytic surfactant and non-ionic surfactant can be used as appropriate.
Anionic surfactants include such as, for example, fatty acid soap, α-acylsulfonate, alkylsulfonate, alkylallylsulfonate, alkylnaphthalenesulfonate, alkylsulfate, POE alkylethersulfate, alkylamide sulfate, alkylphosphate, POE alkylphosphate, alkylamidephosphate, alkyloylalkyl taurine salt, N-acylamino acid salt, POE alkylether carboxylate, alkylsulfosuccinate, sodium alkylsulfoacetate, acylisethionate, acylated hydrolyzed collagen peptide salt and perfluoroalkyl phosphate ester.
Cationic surfactants include such as, for example, alkyltrimethylammonium chloride, stearyltrimethylammonium chloride, stearyltrimethylammonium bromide, cetostearyltrimethylammonium chloride, distearyldimethylammonium chloride, stearyldimethylbenzylammonium chloride, behenyltrimethylammonium bromide, benzalkonium chloride, propyldimethylhydroxypropylammonium behenic amide chloride, diethylaminoethyl-stearamide, dimethylaminopropyl-stearamide and lanolin derivative quaternary ammonium salt. Cationic surfactants also include tertiary amines such as fatty acid amide dialkyl amine and salts thereof.
Ampholytic surfactants include various ampholytic surfactants, for example, those of carboxybetain type, amidebetain type, sulfobetain type, hydroxysulfobetain type, amidesulfobetain type, phoshobetain type, aminocarboxylate type, imidazoline derivative type and amideamine type.
Non-ionic surfactants include such as, for example, propylene glycol fatty acid ester, glycerin fatty acid ester, polyglycerin fatty acid ester, sorbitan fatty acid ester, POE sorbitan fatty acid ester, POE sorbitol fatty acid ester, POE glycerin fatty acid ester, POE alkyl ether, POE fatty acid ester, POE hardened castor oil, POE castor oil, POE •POP copolymer, POE •POP alkyl ether, polyether-denatured silicone alkanolamide laurate, alkylamine oxide, hydrogenated soybean phospholipid, hydrogenized soybean phospholipid, polymer surfactant and biosurfactant.
Natural surfactants may also be used, including such as, for example, lecithin, saponin and saccharide surfactant.
Polyhydric alcohols and sugars include such as, for example, ethylene glycol, diethylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol, polypropylene glycol, glycerin, diglycerin, polyglycerin, 3-methyl-1,3-butanediol, 1,3-butylene glycol, sorbitol, mannitol, raffinose, erythritol, glucose, sucrose, fructose, xylitol, lactose, maltose, maltitol, trehalose, alkylated trehalose, mixed isomerized sugar, sulfated trehalose and pullulan. Chemically modificated forms of these can also be used.
Polymers include such as, for example, anionic polymer compounds such as acrylate ester/methacrylate ester copolymer, vinyl acetate/crotonate copolymer, vinyl acetate/crotonate/vinyl neodecanoate copolymer, methylvinyl ether maleate half ester, t-butyl acrylate/ethyl acrylate/methacrylate copolymer, vinylpyrrolidone/vinyl acetate/vinyl propionate copolymer, vinyl acetate/crotonatecopolymer (RUBISET CA: BASF), vinyl acetate/crotonate/vinylpyrrolidone copolymer, vinylpyrrolidone/acrylate copolymer, acrylate/acrylamide copolymer, vinyl acetate/butyl maleate/isoisobornyl acrylate copolymer, carboxyvinyl polymer, acrylate/methacrylate alkyl copolymer, and ampholytic acetate of dialkyl aminoethyl methacrylate polymer, ampholytic polymer compound such as octyl acrylamide acrylate/hydroxypropyl acrylate/butyl methacrylateaminoethyl copolymer, quaternized compound of vinylpyrrolidone/dimethylaminoethyl methacrylate, cationic polymer compounds such as methylvinyl imidazolium chloride/vinylpyrrolidone copolymer, non-ionic polymer compounds suchs as polyvinylpyrrolidone, vinylpyrrolidone/vinyl acetate copolymer, vinylpyrrolidone/dimethylaminoethyl methacrylate copolymer, vinylcaprolactam/vinylpyrrolidone/dimethylaminoethyl methacrylate copolymer. Polymer compounds of natural origin such as cellulose or derivatives thereof, keratin and collagen or derivatives thereof, calcium alginate, pullulan, agar, gelatin, tamarind seed polysaccharides, xanthan gum, carrageenan, high-methoxyl pectin, low methoxyl pectin, guar gum, gum arabic, crystalline cellulose, arabino galactan, can be karaya, gum tragacanth, alginates, albumin, casein, curdlan, gellan gum and dextran, and glucooligosaccharide, fucose containing polysaccharide, rhamnose containing polysaccharide can also suitably be combined.
Bioactive ingredients include substances which provide skin with some bioactivity when being applied to skin Bioactive ingredients include those with such as, for example, skin-lightening, anti-inflammatory, anti-aging, ultraviolet protection, slimming, firming, antioxidation, hair growth stimulating/hair growing, suppressing hair growth, moisturizing, promoting circulation, antimicrobial/sterilization, cool/warm feeling, promoting wound cure, alleviating irritation, analgesic and cell-activating effects. Bioactive ingredients include such as plant extracts, seaweed extracts, vitamins and derivatives thereof, amino acids, various peptides other than the cyclic peptide, biopolymers such as sodium hyaluronate and mucopolysaccharide, intercellular lipid constituents such as ceramide, phytosphingosine, cholesterol and phytosterol, and analogues thereof, and enzymatic ingredients.
Examples of suitable combining ingredient include such as, for example, Angelica keiskei extract, avocado extract, sweet Hydrangea leaf extract, althea extract, arnica extract, aloe extract, apricot extract, apricot kernel extract, isoflavones, ginkgo extract, fennel extract, turmeric extract, oolong tea extract, Rose Fruit extract, echinacea extract, Baikal skullcup extract, Amur Corktree extract, Coptis japonica extract, barley extract, Hypericum erectum extract, Lamium album extract, cress extract, orange extract, cacao extract, desiccated sea water, seaweed extract, hydrolyzed elastin, hydrolyzed wheat powder, hydrolyzed silk, pumpkin seed extract, chamomile extract, carrot extract, Artemisia capillaris extract, licorice extract, hibiscus extract, Pyracantha fortuneana extract, kiwi extract, cinchona extract, cucumber extract, guanosine, gardenia extract, Sasa veitchii extract, Sophora flavescens extract, cranberry extract, walnut extract, grapefruit extract, clematis extract, chlorella extract, mulberry extract, gentian extract, tea extract, yeast extract, burdock extract, rice bran fermentation extract, rice germ oil, comfrey extract, collagen, cowberry extract, Asarum sieboldii Miq. extract, bupleurum extract, umbilical cord extract, salvia extract, soapwort extract, bamboo grass extract, crataegus extract, zanthoxylum extract, shiitake mushroom extract, Rehmannia root extract, Lithospermum root extract, Perilla frutescens extract, Tilia japonica (Miq.) extract, Filipendula m ultijuga extract, Paeonia lactiflora extract, calamus extract, white birch extract, Equisetum arvense extract, Hedera helix extract, Crataegus oxyacantha extract, European elder extract, yarrow extract, peppermint extract, sage extract, tree mallow extract, cnidium extract, extract of Swertia japonica (Schult.) Makino, soybean extract, jujube extract, soybean fermentation extract, thyme extract, tea extract, clove extract, cogon extract, orange peel extract, Oenothera tetraptera extract, Centella asiatica extract, Terminalia sericea extract, dong quai extract, common marigold extract, peach kernel extract, bitter orange peel extract, extract of Houttuynia cordata Thunb., tomato extract, natto extract, ginseng extract, garlic extract, wild rose extract, hibiscus extract, Ophiopogon japonicus extract, parsley extract, honey, banana flower extract, hamamelis extract, parietaria extract, Isodon japonicus (Burm.) Hara extract, bisabolol, loquat extract, coltsfoot extract, butterbur flower extract, Poria Sclerotium extract, butcher's-broom extract, grape extract, propolis, luffa extract, safflower extract, peppermint extract, linden extract, tree peonyextract, hop extract, pine extract, horse chestnut extract, Lysichiton camtschatcense (L.) Schott extract, Sapindus mukurossi Gaertn. extract, Melissa extract, peach extract, bluebottle extract, eucalyptus extract, Saxifraga stolonifera extract, Citrus junos extract, coix seed extract, mugwort extract, lavender extract, apple extract, lytchee (Litchi) extract, lettuce extract, lemon extract, Chinese milk vetch extract, rose extract, rosemary extract, Roman chamomile extract and royal jelly extract.
Examples also include such as biopolymers such as deoxyribonucleic acid, mucopolysaccharides, sodium hyaluronate, sodium chondroitin sulfate, collagen, elastin, chitin, chitosan and hydrolyzed eggshell membrane; moisturizing ingredients such as amino acids, hydrolyzed peptides, sodium lactate, urea, sodium carbonate pyrrolidone, betain, whey, trimethyl glycine, polypeptides such as lysine/arginine condensate etc.; intercellular lipid constituents such as sphingolipid, ceramide, phytosphingosine, cholesterol, cholesterol derivative, phytosterol derivative, phospholipid and analogues thereof; anti-inflammatory agents such as ε-aminoaminocaproic acid, glycyrrhizic acid, β-glycyrrhetinic acid, lysozyme chloride, guaiazulen, hydrocortisone, tea tree oil; vitamins such as vitamin A and derivatives thereof, vitamin B2 and derivatives thereof, vitamin B6 and derivatives thereof, vitamin C and derivatives thereof, vitamin D and derivatives thereof, vitamin E and derivatives thereof, calcium pantothenate, biotin and nicotinic acid; active agents such as allantoin, diisopropylamine dichloroacetate, 4-aminomethylcyclohexane carbonate; antioxidants such as tocopherol, carotenoids, flavonoids, tannin, lignan and saponin; cell activating agents such as α-hydroxy acid and 6-hydroxy acid; circulation accelerating agents such as γ-oryzanol and vitamin E derivative; wound curing agents such as retinol and retinol derivative; skin-lightening agents such as arbutin, kojic acid, placenta extract, sulfur, ellagic acid, linolenic acid, tranexamic acid, glutathione; hair growing agents such as cepharanthine, glycyrrhiza extract, capsicum tincture, hinokitiol, garlic extract iodide, pyridoxine hydrochloride, DL-α-tocopherol, DL-α-tocopherol acetate, nicotinic ac id, nicotinic acid derivative, calcium pantothenate, D-pantothenyl alcohol, acetyl pantothenyl ethyl ether, biotin, allantoin, isopropylmethylphenol, estradiol, ethinylestradiol, carpronium chloride, Benzalkonium chloride, diphenhydramine hydrochloride, Takanal, camphor, salicylic acid, vanillyl nonylate amide, vanillyl nonanoate amide, piroctone olamine, glyceryl pentadecanoate, L-menthol, mononitroguaiacol, resorcin, γ-aminobutyric acid, benzethonium chloride, mexiletine hydrochloride, auxin, female hormones, cantharides tincture, Cyclosporine, zinc pyrithione, hydrocortisone, minoxidil, polyoxyethylene sorbitan monostearate, peppermint oil, Sasanishiki extract.
Antioxidants include such as, for example, sodium bisulfite, sodium sulfite, erythorbic acid, sodium erythorbate, dilauryl thiodipropionate, tocopherol, tolyl biguanide, nordihydroguaiaretinoic acid, parahydroxyanisole, butyl hydroxyanisole, dibutyl hydroxytoluene, ascorbyl stearate, ascorbyl palmitate, octyl gallate, propyl gallate, carotenoids, flavonoids, tannin, lignans, saponins and plant extracts in which the antioxidative effect is recognized such as apple extract or clove extract.
Solvents include such as physiological saline, purified water, ethanol, lower alcohols, ethers, LPG, fluorocarbons, N-methylpyrrolidone, fluoroalcohols, volatile straight chain silicones and next-generation chlorofluorocarbons.
The cyclic peptide of the invention and/or a derivative thereof and/or a pharmaceutically acceptable salt thereof can be used for preparation of the external preparation as described above, and therefore the present invention also relates to a use of the cyclic peptide of the invention and/or a derivative thereof and/or a pharmaceutically acceptable salt thereof for preparing the external preparation.
3. Method of Using the External Preparation
Next, methods of using the external preparation of the invention is explained.
A method of using the external preparation of the invention comprises applying the external preparation of the present invention as described above to the skin and/or mucosa of a subject.
Subjects include human and vertebrates such as, without being particularly limited, for example, birds and mammals. Animals specifically include, for example, experimental animals including rodents such as mice, rats, gerbils, hamsters and guinea pigs, domestic animals such as pigs, goats, horses, sheep and minks, pet animals such as dogs and cats, primates such as human, monkeys, cynomolgus monkeys, rhesus monkeys, marmosets, orangutans and chimpanzees. On the other hand, human may be excluded from the subjects.
Skin and/or mucosa of a subject to which the external preparation is to be applied may be skin or mucosa at any site of the subject, and the external preparation is applicable, for example, to skin or mucosa of head (scalp), face, neck, arms, torso, arms, hands or feet, etc.
Specific method for using the external preparation of the present invention is as follows.
(1) Method of Treating and Preventing Dermatitis
When the external preparation of the present invention is used as a therapeutic/prophylactic of dermatitis, the external preparation can be applied directly to the aimed site of skin and/or mucosa (e.g., the affected site where dermatitis has been developed).
The application frequency is, without being particularly limited, for example, 1 to 10 times a day, preferably 1 to 5 times a day, yet more preferably 1 to 3 times a day. Because the external preparation of the present invention has a long lasting time, it exerts a sufficient effect even if it is applied at relatively low frequency, for example, once a day.
In terms of dosage, the total amount of the cyclic peptide of the invention and a derivative thereof and a pharmaceutically acceptable salt thereof for one application can be, without being particularly limited, for example, 0.0001 to 1000000 μg/mL, preferably 0.001 to 10000 μg/mL, more preferably 0.01 to 1000 μg/mL, yet more preferably 0.1 to 100 μg/mL, particularly preferably 1 to 100 μg/mL.
In another embodiment, each dose may comprise the cyclic peptide of the invention at a concentration of 1 to 800 μg/mL or 3 to 500 μg/mL.
(2) Method of Alleviating or Resolving Itch
When the external preparation of the present invention is used as an antipruritic, the external preparation can be applied directly to the aimed site of skin and/or mucosa.
The application frequency is, without being particularly limited, for example, 1 to 10 times a day, preferably 1 to 5 times a day, yet more preferably 1 to 3 times a day.
In terms of dosage, the total amount of the cyclic peptide of the invention and a derivative thereof and a pharmaceutically acceptable salt thereof for one application can be, without being particularly limited, for example, 0.0001 to 1000000 μg/mL, preferably 0.001 to 10000 μg/mL, more preferably 0.01 to 1000 μg/mL, yet more preferably 0.1 to 100 μg/mL, particularly preferably 1 to 100 μg/mL. In another embodiment, each dose may comprise the cyclic peptide of the invention at a concentration of 1 to 800 μg/mL or 3 to 500 μg/mL.
(3) Method of Using as a Cosmetic
When the external preparation of the present invention is used as a cosmetic, the external preparation can be applied directly to the aimed site of skin and/or mucosa.
The application frequency is, without being particularly limited, for example, 1 to 10 times a day, preferably 1 to 5 times a day, yet more preferably 1 to 3 times a day.
In terms of dosage, the total amount of the cyclic peptide of the invention and a derivative thereof and a pharmaceutically acceptable salt thereof for one application can be, without being particularly limited, for example, 0.0001 to 1000000 μg/mL, preferably 0.001 to 10000 μg/mL, more preferably 0.01 to 1000 μg/mL, yet more preferably 0.1 to 100 μg/mL, particularly preferably 1 to 100 μg/mL. In another embodiment, each dose may comprise the cyclic peptide of the invention at a concentration of 1 to 800 μg/mL or 3 to 500 μg/mL.
(4) Method of Treating and Preventing Alopecia, and Method of Stimulating Hair Growth and Method of Growing Hair
When the external preparation of the present invention is used as a therapeutic/prophylactic of alopecia, a hair growth stimulant or a hair growing agent, the external preparation can be applied directly to the aimed site (e.g., decalvant site of scalp or skin)
The application frequency is, without being particularly limited, for example, 1 to 10 times a day, preferably 1 to 5 times a day, yet more preferably 1 to 3 times a day.
In terms of dosage, the total amount of the cyclic peptide of the invention and a derivative thereof and a pharmaceutically acceptable salt thereof for one application can be, without being particularly limited, for example, 0.0001 to 1000000 μg/mL, preferably 0.001 to 10000 μg/mL, more preferably 0.01 to 1000 μg/mL, yet more preferably 0.1 to 100 μg/mL, particularly preferably 1 to 100 μg/mL. In another embodiment, each dose may comprise the cyclic peptide of the invention at a concentration of 1 to 800 μg/mL or 3 to 500 μg/mL.
(5) Method of Treating and Preventing Rhinitis
When the external preparation of the present invention is used as a therapeutic/prophylactic of rhinitis, the external preparation can be applied directly to the aimed site (e.g., nasal cavity mucosa).
The application frequency is, without being particularly limited, for example, 1 to 10 times a day, preferably 1 to 5 times a day, yet more preferably 1 to 3 times a day.
In terms of dosage, without being particularly limited, for example, for one application to each nasal cavity, the total amount of the cyclic peptide of the invention and a derivative thereof and a pharmaceutically acceptable salt thereof can be 0.0001 to 1000000 μg/mL, preferably 0.001 to 10000 μg/mL, more preferably 0.01 to 1000 μg/mL, yet more preferably 0.1 to 100 μg/mL, particularly preferably 1 to 100 μg/mL. In another embodiment, each dose may comprise the cyclic peptide of the invention at a concentration of 1 to 800 μg/mL or 3 to 500 μg/mL.
4. Medicament
Next, the medicament of the present invention is explained.
The medicament of the present invention comprises one or more cyclic peptides of the invention or derivatives thereof or pharmaceutically acceptable salts thereof.
As mentioned above, similarly to BNP, the cyclic peptide of the present invention or a derivative thereof or a pharmaceutically acceptable salt thereof binds to the receptor NPR-A (also known as GC-A), which has a guanylate cyclase domain, and promotes the production of cyclic guanosine monophosphate (cGMP). It is considered to have effects such as, for example, diuretic action, vasodilation, renin-aldosterone secretion suppressing action, sympatholytic activity and hypertrophy suppressing action. Also, the compounds of the invention is considered to have a superior efficacy and effect, particularly a superior immediate effect, as compared with BNP.
Therefore, the medicament of the present invention can be used for a similar object as a conventional medicament comprising BNP as an active agent.
Diseases for which the medicament of the present invention is applicable include such as, without being particularly limited, for example, the aforementioned various diseases as well as hypertension, unstable angina, acute myocardial infarction, edematous diseases, renal failure, cardiac failure, immune diseases, obesity and metabolic syndrome.
A formulation of the medicament of the present invention can be, without being particularly limited, addingly to the external preparations as mentioned above, for example, formulations for oral administration such as tablets, capsules, granules, powders, oral solution, syrup and oral jelly, formulations for oral application such as buccal tablets, buccal spray formulation, buccal semi-solid formulation and mouthwash, formulations for administration via injection such as an injection and infusion, dialysis formulation such as dialysis solution, as well as an inhalant, eye drop, ocular ointment, ear drop, vaginal tablet and vaginal suppository.
Hereinbelow, the present invention is further specifically illustrated by working examples. It should be noted that the present invention is not limited by these working examples.
1. Preparation of the Cyclic Peptide
Firstly, a cyclic peptide composed of the amino acid sequence expressed by Formula I-a is synthesized.
Specifically, a linear peptide consisting of 17 amino acids was formed by sequentially binding amino acids by solid-phase peptide synthesis using a peptide synthesizer. Subsequently, protecting groups at Cys1 and Cys17 were detached before treating with iodine GO to form a cysteine binding between oxidatively same amino acid residues, thereby forming a cyclic peptide.
A composition comprising the obtained cyclic peptide was purified by reverse-phase high performance liquid chromatography (reverse-phase HPLC) and then lyophilized to yield a purified cyclic peptide as white powder.
Mass spectroscopy was performed on the obtained cyclic peptide.
Conditions for HPLC are shown below:
Apparatus: Agilent 1100
Flow rate: 1.0 ml/min
Eluent A: 0.1% trifluoroacetic acid/water
Eluent B: 0.1% trifluoroacetic acid/acetonitrile
Gradient: 80% Eluent B, isocratic
Conditions for Mass spectroscopy (MS) are shown below:
Apparatus: Thermo Finnigan LCQ Advantage
Ionization method: electrospray ionization
Analytical method: ion trapping
The observed results, m/z=901.83 ([M+2H]2+), m/z=1801.84 ([M+H]+), confirmed that above peptide is in agreement with the theoretical values of the molecular weight (1802.07) and the mass number (1800.8069) calculated from the composition formula of the cyclic peptide of interest (C72H120N24O24S3).
Furthermore, the purity of the above peptide was measured by HPLC using following conditions:
Column: Discovery C18, 4.6 mm×250 mm, particle diameter 5 micron
Column temperature: room temperature
Eluent A: 0.1% trifluoroacetic acid/water
Eluent B: 0.1% trifluoroacetic acid/acetonitrile
Gradient: 10 to 30% Eluent B/20 minutes
Flow rate: 1.2 ml/min
Temperature: room temperature
Injected volume: 20 μl
Detector: UV detector (detection wavelength: 215 nm)
The result of measurement confirmed that the purity of the obtained protein was 99.2%.
2. Preparation of Formulation
2.1 Preparation of Gel Formulation
Preparation of a gel-based formulation comprising a cyclic peptide composed of the amino acid sequence expressed by Formula I-a (in the working examples below, “B ring” is referred to mean a cyclic peptide expressed by such Formula I-a) (B ring gel formulation, Working Examples) and a gel-based formulation comprising human BNP (BNP gel formulation, Comparative Examples) were carried out as follows.
0.1 g of methyl-p-hydroxybenzoate (trade name: Mekkins-M, Ueno Fine Chemicals Industry, Ltd.), 0.2 g of phenoxyethanol and 3.0 g of 1,2-pentanediol were weighed into one same vessel, heated to 60 to 70° C. to make a homogenous solution, and this solution was poured into a mixer.
Next, added into the mixer 6.0 g of concentrated glycerin, and then the mixture of 0.44 g of carboxyvinyl polymer (trade name: Carbopol® 940, Lubrizol Advanced Materials Corporation) and 0.08 g of xanthane gum (trade name: KELTROL® T, CP Kelco, Inc.), and the mixuter was stirred with a paddle until they dispersed sufficiently.
Then 83.95 g of purified water was gradually added with stirring with a paddle. The mixer was heated to 70 to 80° C. while stirring with a paddle or disper until the dispersed contents were dissolved to give a solution. Subsequently, the disper was stopped and the solution was cooled immediately after confirming that the contents in the solution were dissolved. When the temperature of the mixer reached approximately 40° C., 6.0 g of Lubrajel® NP from Ashland Inc. (glycerin 2.7 g, carboxyvinyl polymer 0.06 g, sodium polyacrylate 0.018 g, water 3.222 g) was added to the solution, mixed uniformly with a paddle. Subsequently, 0.230 g of potassium hydroxide was further added to neutralize the solution, then the rotation of the paddle was stopped when the temperature of the mixer reached 25° C. to prepare a gel base.
Next, 20.1 mg of the the cyclic peptide (B ring) composed of the amino acid sequence expressed by Formula I-a was dissolved in 144 mL of physiological saline to obtain B ring solution. 0.131 mL of this solution was admixed with 10 g of the gel base obtained as described above, and the mixture was stirred uniformly to prepare a gel based formulation (B ring gel formulation) containing B ring at a concentration of about 1 μM (about 1.8 μg/g). Similarly, gel based formulations containing B ring at concentrations of about 0.3 μM (about 0.54 μg/g), about 0.5 μM (about 0.9 μg/g) and about 2.0 μM (about 3.6 μg/g) were prepared. In the working examples below, as long as it is specifically described otherwise, “B ring gel formulation” used contained B ring at a concentration of about 1 μM.
Next, 20.5 mg of human BNP-32 (American Peptide Company) was dissolved in 118 mL of physiological saline to obtain BNP solution. 0.2 mL of this solution was admixed with 10 g of the gel base obtained as described above, and the mixture was stirred uniformly to prepare a gel based formulation (BNP gel formulation) containing BNP-32 at a concentration of about 1 μM. Similarly, gel based formulations containing BNP-32 at concentrations of about 0.5 μM and 2.0 μM were prepared. In the working examples below, as long as being specifically described otherwise, “BNP gel formulation” used contained BNP at a concentration of about 1 μM.
2.2 Preparation of Nasal Drop
A nasal drop comprising the cyclic peptide (B ring) composed of the amino acid sequence expressed by Formula I-a (B ring nasal drop, Working Examples) and a nasal drop comprising human BNP (BNP nasal drop, Comparative Examples) were prepared as follows.
Firstly, the cyclic peptide (B ring) composed of the amino acid sequence expressed by Formula I-a was dissolved in physiological saline, the concentration was adjusted to prepare B ring nasal drop containing B ring at a concentration of about 1 μmol/l (about 1.8 μg/g).
Next, B ring nasal drop was filled in a quantitative nasal spray container (AS ONE Corporation) and the amount ro be sprayed for each administration was adjusted to 100 μl (0.1 ml), resulting B ring nasal drop.
Similarly, a BNP nasal drop comprising human BNP (American Peptide Company) at a concentration of 1 μmol/1 was obtained, filled in a quantitative nasal spray container (AS ONE Corporation), and the amount ro be sprayed for each administration was adjusted to 100 μl (0.1 ml), resulting BNP nasal drop.
3. Confirming Therapeutic Effect on Dermatitis
3.1 Confirming the Effect of B Ring Gel Formulation
For subjects suffering various dermatitis, B ring gel formulation as described was applied onto the affected site, and changes in symptoms before and after the application were observed. When possible, as a comparative example, BNP gel formulation as described was applied onto another affected site on the same subject where B ring gel formulation had not been applied, and changes in symptoms before and after the application were observed. For pruritus, VAS (Visual Analogue Scale) was used for evaluating each affected site on 10 stages.
The examination results are shown in Tables 1 to 7 along with age, sexuality, symptoms of the subject, and formulation given to the subject.
As shown in Tables 1 to 8, in all subjects, or in all dermatitis of any symptoms, emission or elimination of various symptoms of dermatitis was observed at the site where B ring gel formulation was applied.
Specifically, when B ring gel formulation was applied, remission or elimination of pruritus was observed immediately after the application. Generally in dermatitis, patients tend to scratch where pruritus was felt, potentially causing severer dermatitis. Such a remarkable remission or elimination of pruritus in this manner can consequently prevent aggravation of dermatitis.
In all cases, the effects of B ring gel formulation were superior to those with BNP gel formulation. Specifically, B ring gel formulation had faster-acting and longer-lasting effects as well as more potent antipruritic effect as compared with BNP gel formulation. It was confirmed that these effect cannot be obtained by the gel base.
3.2 Comparing B Ring Gel Formulation to Gel Base by Two-Sided Application
For subjects suffering various dermatitis, either B ring gel formulation or the gel base was applied to the affected site, and changes in symptoms before and after the application were observed (Table below).
4. Confirming Cosmetic Effect
Effects of a cosmetic comprising B ring were evaluated from the results obtained using a gel formulations, a bath agent and a hair cosmetic product (shampoo or rinse) or body soap comprising the B ring to confirm their effects.
4.1.1 Confirming Skin-Improving Effect (Comparing B Ring Gel Formulation to BNP Gel Formulation)
The B ring gel formulation or BNP gel formulation was applied to subjects. The B ring gel formulation was applied on the right cheek or eye of each subject, the BNP gel formulation on the left cheek or eye, and changes in skin conditions were observed and compared (Table below). The changes in skin conditions were determined based on physical sensory evaluation by the subject and our objective observation as physicians.
Table below summarizes examples in which B ring gel formulation was applied without applying two-sided. The changes in skin conditions were determined by similar method as described above.
Accordingly, it was shown that B ring of the present invention has a skin moisturizing effect and is capable of improving skin texture, and that it is also effective in improving skin, for instance in lightening (spots, dullness) and anti-aging (flabbiness, resilience, large wrinkles) as well as in improving mucosal condition such as roughened lips.
In all subjects, a remarkable improving effect in skin and its persistence was observed at the site where B ring gel formulation had been applied as compared to where BNP gel formulation had been applied. Specifically, effects as follows were observed at the site where B ring gel formulation had been applied as compared to where BNP gel formulation had been applied with significance: effects of improving skin, moisturizing skin, improving skin texture, providing skin with resilience and firmness, softening skin, suppressing skin desiccation, fading fine wrinkles, supplying and keeping skin with water and oil, shallowing and diminishing crow's feet, eliminating skin rawness, eliminating and suppressing itches, relieving skin roughness and maintaining skin condition healthy.
Particularly, in subjects in their 20's or 30's, remarkable effects such as improving or eliminating wrinkles, improving cheek flabbiness, and supplying and keeping skin with moisture, water and oil, and the effects such as giving skin firmness and tightness, lifting up cheeks, eliminating skin rawness and relieving skin roughness were observed at the site where B ring gel formulation had been applied as compared to the site where BNP gel formulation had been applied, and these effects were greater as compared to those at BNP gel-applied site.
Moreover, in subjects in their 40's and 50's, remarkable effects such as improving flabbiness, large wrinkles and desiccation, giving skin firmness, fading dullness and spots were exhibited immediately after the application of B ring gel formulation, and these effects were greater as compared to those upon applying BNP gel formulation.
The effects exhibited significantly faster in B ring gel formulation as compared to BNP gel formulation. Specifically, effects were confirmed in most cases such that wrinkles were vanished or started to vanish and faded and skin was made full and resilient. These effects lasted for at least several hours thereafter. No irritating symptoms were observed with application of B ring gel formulation.
4.1.2 Confirming Skin-Improving Effect (Comparing B Ring Gel Formulation to Gel Base)
In order to examine the presence or absence of the contribution by the gel base to the effects of B ring gel formulation and BNP gel formulation, three subjects were administered B ring gel formulation on their right face and the gel base on the left, and changes in skin conditions on the subject's faces were observed (Table below).
As a result, all subjects felt tingling sensation at the site where the gel base was applied, and dry feeling of skin was not improved. Also, in all subjects, no effect (e.g., improved skin texture or closed pores) was observed at the site where the gel base was applied. On the other hand, in all subjects, the skin area on which B ring gel formulation was applied has been moisturized and softened.
4.2 Observation on Mucosal Condition Upon Application of B Ring Gel Formulation.
The B ring gel formulation was applied to normal subjects who had symptoms of roughened lips, and changes in mucosal condition were observed (Table below). The changes in mucosal conditions were determined based on physical sensory evaluation by the subject and our objective observation as physicians.
Accordingly, it was confirmed that the cyclic peptide of the invention has an activity of improving mucosal condition and it also has an immediate effect in such activity.
4.3 Observation on Scalp/Hair Condition Upon Application of B Ring Gel Formulation.
The B ring gel formulation was applied to normal subjects who had symptoms of scalp/hair, and changes in conditions of scalp and hair were observed (Table below). The changes in scalp/hair were determined based on physical sensory evaluation by the subject and our objective observation as physicians.
Accordingly, BNP cyclic peptide of the present invention can provide and keep scalp and hair with moisture, give them moderate water and oil, improve and prevent desiccation, and clean scalp and hair. It is further effective for suppressing itch and dandruff of scalp and also effective for preventing thinning or loosing hair, for growing hair and promoting or stimulating hair growth, and forcing hair growth, and furthermore effective for an improvement in alopecia after illness or postnatal alopecia.
4.4 Observation on Skin Condition Upon Using Bath Agent Comprising B Ring
Subjects were given bath in 37 to 41° C. hot water comprising B ring dissolved at 0.01 μM (100 ml of 20 μM B ring solution dissolved in 200 L hot water) once a day for 14 days, and skin condition of the subjects was compared to the case of hot water alone (Table 14). The changes in skin conditions were determined based on physical sensory evaluation by the subject and our objective observation as physicians.
Accordingly, it was confirmed that the bath agent comprising B ring of the present invention has an ameliorating effect on miliaria, cracked or chapped skin, and also an improving effect on eczema. Furthermore, it was shown to improve desiccation, pain and itch of the skin, indicating that it is effective for improvement of skin condition.
4.5 Observation on Conditions of Scalp and Hair or Skin Upon Using Hair Cosmetics (Shampoo, Rinse) or Body Soap Comprising B Ring
4.5.1 a Shampoo Comprising B Ring was Mixed and Prepared in Composition as Follows.
A and B were dissolved with heat at 70° C. To A, B was added, stirred and mixed. C was added at 40 to 35° C. while being further stirred, and allowed to cool to room temperature as kept being stirred.
4.5.2 a Conditioner Comprising B Ring was Mixed and Prepared in Composition as Follows.
A and B were dissolved with heat at 80° C. Then A was stirred by a homomixer while B was gradually added thereto, and the mixture was emulsified. C was further added to the mixture, and the mixture was allowed to cool to 35° C. as kept being stirred.
4.5.3 a Body Soap Comprising B Ring was Mixed and Prepared in Composition as Follows.
A and B were dissolved with heat at 80° C. Then B was added to A while being stirred. C was further added to the mixture at 40 to 35° C. while kept being stirred, and the mixture was allowed to cool to room temperature as kept being stirred.
Subjects used shampoo, rinse or body soap prepared as above once a day for 14 days, and resulted conditions of scalp and hair or skin of the subjects were assessed (Table below). Changes in skin condition was assessed by dandruff of scalp. Changes in erythema was assessed by visual observation by the subject. Itches, moisturized feeling, combing, glow, resilience and elasticity of hair were assessed by subject's physical sensory evaluation.
Accordingly, the use of the hair agent comprising B ring of the present invention had an fast-acting improving effect on itch, erythema and desiccation of scalp. Moreover, it was shown to be effective in improving symptoms of thinning and falling hair when it was used continuously for at least 2 weeks. Furthermore, it was shown that the use of the body soap comprising B ring of the present invention has an improving effect on dry or sensitive skin.
5. Confirming Therapeutic Effect on Alopecia
Either B ring gel formulation or BNP gel formulation was applied, and their effects on symptoms associated to various alopecia were observed (Table below). The changes in symptoms were determined based on physical sensory evaluation by the subject and our objective observation as physicians.
5.2 Case Summary
In the cases of the subjects having female pattern alopecia, male pattern alopecia, alopecia universalis, ophiasis or alopecia areata multilocularis as described above, a significant decrease in falling hair was observed, and the area of terminal hair growth was expanded, and the growth of the terminal hair was also faster, when B ring gel formulation of the working example was applied compared with BNP gel formulation as a comparative control (See,
In addition, the B ring gel formulation could improve seborrhea, clean scalp and suppress dandruff. It also prevents hairs from turning white, grows black hairs, and improves thinning of hair. Moreover, it exhibits an antipruritic effect within 10 minutes, demonstrating an excellent immediate effect. It could suppress ithes within 3 minutes after application in some cases.
6. Confirming Therapeutic Effect on Rhinitis
6.1 Cases
Either ring nasal drop, BNP gel nasal drop was sprayed, and their effects on rhinitis in the subject was observed (Table 17). The changes in symptoms were determined based on physical sensory evaluation by the subject and our objective observation as physicians.
6.2 Case Summary
In all cases described above, both rhinorrhea and nasal obstruction were quickly improved or eliminated when B ring nasal drop of the working example had been applied as compared to the case when BNP nasal drop of comparative example had been applied. Accordingly, B ring nasal drop had faster effect than BNP nasal drop. Addingly, the effect of B ring nasal drop was more than equal to that of BNP nasal drop, and because the effect lasted for longer time period, it can suppressing recurrence of symptoms.
The following table summarizes information from the cases described above, within the range recognizable at the time when symptoms of nasal obstruction and rhinorrhea were improved.
7. Analysis of Binding State of Human BNP and Type A Receptor
The superior pharmacological effects of the B ring-compound of the invention on various diseases relative to conventional BNP has been explained so far with reference to data based on respective clinical cases. Such pharmacological effects is also supported by the result of the conformation analysis of the compound performed by the inventors, which is explained by following experimental report for reference.
In order to investigate binding state of human BNP (BNP-32) and its receptor Type A receptor (NPR-A), an in silico analysis was performed by homology modeling using conformation. Swiss-Pdb viewer and SWISS-MODEL were used for modeling.
7.1 Template Structure
Firstly, prior to the above analysis, a template structure for investigation on binding state of human BNP and Type A receptor was selected. As this template structure, the conformation of the complex of rat NPR-A and rat ANP peptide (PDB ID: 1T34) were used. Rat NPR-A is a homodimer composed of A and B strands. The conformation of such rat NPR-A has been determined by X-ray crystalline structural analysis such that 21 residues from Cys7 to Arg 27 of rat ANP were bound. The conformation of rat NPR-A was obtained from the database of protein conformation, Protein Data Bank. Amino acid homology between human NPR-A and rat NPR-A is 85%.
7.2 BNP Peptide Model
In the present study, as BNP peptide model, a resion from Cys10 to Arg30 in human BNP (BNP-32, SEQ ID NO: 13, Ser-Pro-Lys-Met-Val-Gln-Gly-Ser-Gly-Cys-Phe-Gly-Arg-Lys-Met-Asp-Arg-Ile-Ser-Ser-Ser-Ser-Gly-Le u-Gly-Cys-Lys-Val-Leu-Arg-Arg-His), i.e., an amino acid sequence (SEQ ID NO: 14, Cys-Phe-Gly-Arg-Lys-Met-Asp-Arg-Ile-Ser-Ser-Ser-Ser-Gly-Leu-Gly-Cys-Lys-Val-Leu-Arg) was used. In the peptide model above, the amino acid sequence of B ring of the invention corresponds to a resion from Cys10 to Cys26 of human BNP above, i.e., Cys-Phe-Gly-Arg-Lys-Met-Asp-Arg-Ile-Ser-Ser-Ser-Ser-Gly-Leu-Gly-Cys (SEQ ID NO: 15).
7.3 Homology Modeling
In order to speculate the amino acid residues that are involved in binding of human NPR-A and human BNP, a complex model in which BNP peptide is bound to human NPR-A was constructed by homology modeling. Specifically, human BNP peptide model was constructed based on the template structure of rat ANP peptide, and human NPR-A model structure based on the template structure of rat NPR-A.
Next, residues that are involved in the interaction was speculated from the amino acid residues detected between human BNP peptide model and human NPR-A.
The results showed that BNP peptide model is bound to human NPR-A dimer being sandwiched between the A strand and B strand. Amino acids in the amino acid sequence, e.g., the amino acid sequence used as the model (SEQ ID NO: 14, Cys-Phe-Gly-Arg-Lys-Met-Asp-Arg-Ile-Ser-Ser-Ser-Ser-Gly-Leu-Gly-Cys-Lys-Val-Leu-Arg) are expressed as “amino acid (number)”. Namely, the number in parentheses denotes the relative position counted from the N-terminal of the amino acid sequence, for example, Phe2 indicates an amino acid that is the second Phe counted from the N-terminal of the peptide model.
In the constructed complex model, the presence of a hydrophobic bond by Phe2 side chain, a hydrogen bond by Phe2 main chain, and hydrogen bonds by side chains of Arg4, Met6, Arg8, Ser10 and Ser11 were speculated between BNP peptide model and the A strand of NPR-A. Phe2, Arg4, Met6, Arg8, Ser10 and Ser11 in BNP peptide model correspond to Phell, Arg13, Met15, Arg17, Ser19 and Ser20 in human BNP respectively. Namely, this result suggests that these amino acid residues in human BNP is likely to be the residues that contribute to NPR-A activation.
7.4 Discussion
Thus, by in silico conformation analysis, it was speculated that, in human BNP, the amino acid residues that are present in its cyclic part are likely to contribute to NPR-A activation, whereas the amino acid residues present in the tail part are not. It was also suggested that BNP cyclic structure is a smaller molecule than BNP-32 and therefore capable of binding easily and quickly. In fact, a clinical application of a peptide having BNP cyclic structure confirmed that BNP cyclic structure provides faster therapeutic effect than BNP-32. This clinical result is consistent with that of the in silico analysis that BNP cyclic structure contributes to NPR-A activation and can bind to it more easily and quickly than BNP-32. Thus, BNP cyclic structure has a superior therapeutic effect than a general BNP peptide, and therefore is a different substance.
On the other hand, an NMR analysis revealed that ANP does not take any particular conformation in a solution where its conformation greatly wobbles; this is considered to be similar for BNP. Namely, in human BNP, assuming that the amino acid residues in the cyclic part contribute to its binding to human NPR-A, it is speculated that the amino acid residues in the tail part rather prevent human BNP from entering into the narrow BNP binding site sandwiched between A and B strands of human NPR-A due to its large wobbling. Therefore, it is considered that the cyclic part of human BNP is a relatively smaller molecule than conventionally known human BNP, enabling itself to enter into BNP binding site of NPR-A more easily and quickly. Moreover, it is speculated that the the cyclic part of human BNP has a higher affinity to human NPR-A than BNP-32. This supports the clinical outcomes described herein that the peptide having only the cyclic part of BNP exhibits therapeutic effect faster than BNP-32.
In order to speculate the effect of BNP cyclic structure (B ring) from non-human species on human Type A receptor, complex models of human NPR-A and BNP rings from pig, bird or rat were generated to surmise interaction. The results suggested that a sufficient effect of the invention can be expected by using BNP ring from non-human animal species (e.g., pigs, birds or rats), as long as it shows an affinity to human NPR-A.
8. Speculating Replaceable Amino Acid Residues in BNP Cyclic Moiety
Using the constructed model structure of the complex, replaceablity of amino acid residues other than those considered to be involved in the interaction was investigated.
Specifically, in order to investigate whether the peptide in which amino acid residue that is not assumed to be involved in the interaction has been replaced with another amino acid is capable of binding to NPR-A, a mutant model of BNP was generated to analyze the interaction. Swiss-Pdb viewer was used for modeling.
Specifically, amino acid residues Gly12, Lys14, Asp16, Ile18, Ser21, Ser22, Gly23, Leu24 and Gly25 in human BNP were targeted for the investigation on their replaceability with other amino acids in terms of following points:
Among those described above, intramolecular energy was calculated by ComputeEnergy command of Swiss-Pdb viewer. Intramolecular energy was calculated from the sum of the length of binding, bond angle, twist and binding energy, etc. in the unit kilojoule/mol (Kj/mol).
The results of analysis indicated the presence of replaceable amino acid residues in Gly12, Lys14, Ile18, Ser21, Ser22, Leu24 and Gly25 among the amino acid residues of human BNP (Table below).
Accordingly, even when the replacement of the amino acid corresponding to those described in the table above took place in the cyclic part of human BNP, i.e., the peptide expressed by the Formula I-a, it was suggested that the peptide replaced in such a way exerts a similar effect as the peptide composed of the amino acid sequence expressed by Formula I-a.
9. Confirming Therapeutic Effect of the Cyclic Peptide with Amino Acid Replacement
Next, cyclic peptides with some replaced amino acid were subjected to following examination in order to confirm their effect. The methods for preparing the above cyclic peptide and confirming amino acid sequence of the prepared peptide were same as the method for preparing the cyclic peptide as described above and Mass spectroscopy method.
9.1 Confirming Effects on Scalp or Hair
The obtained cyclic peptide was prepared in purified water at 3, 15, 30, 100 or 500 μg/ml and applied to the affected site. Each of formulations A to E in the table indicates the concentration of cyclic peptide at 3, 15, 30, 100 or 500 μg/ml, respectively. The absence of the effect upon the application of purified water confirmed the effect was not a placebo effect.
The result described above demonstrated that the cyclic peptide of the invention exhibits a similar effect as the cyclic peptide expressed by Formula I-a even if some amino acids of the cyclic peptide have been replaced.
Specifically, it has effects of preventing hair loss at the applied site, stimulating hair growth or promoting hair growth, giving hair resilience and elasticity, increasing volume of hair and dramatically decreasing falling hairs when it was applied to the site of alopecia or hair growth stimulation, etc. It also has effects of nourishing hair, promoting hair growth stimulation, improving/preventing thinning of hair at the applied site. In this case, the stimulated hair tends to become a terminal (non-white) hair. Moreover, these effect exhibit significantly faster as compared to other active agents conventionally used in alopecia therapeutics such as BNP such that stimulated hair growth can be confirmed one day after only one application even in the case of an intractable alopecia areata multilocularis or ophiasis. In addition, resulting effects persists remarkably even after terminating application and the stimulated hair keep growing. In the case of AGA or healthy subject it exert immediate effect of providing hair with resilience and elasticity on the following day, increasing the volume, and dramatically decreasing falling hairs, which effects last even after terminating application. It also has an improving and preventing effect on dermatitis. Therefore, it can improve or prevent skin inflammation associated with alopecia. Such effect is advantageous in cases where alopecia has been exacerbated due to skin condition of the applied site (e.g., scalp). Moreover, the external preparation of the present invention exerts a moisturizing and skin texture-improving effects at the applied site when being applied to skin as described above. It can remove and suppress dandruff and itching, while giving moisture to hair and scalp, improving and preventing dryness and keeping hair and scalp healthy. It also can improve seborrhea. On the other hand, when it is used as an alopecia therapeutic/prophylactic, it can be used for the purpose of treating or preventing one or more of applicable alopecia including, for example, those described below, without being particularly limited thereto.
(Acquired Alopecia)
(i) Alopecia without accompanying scarring or skin lesion (alopecia areata, male pattern alopecia, seborrheic alopecia, alopecia pityroides, female pattern alopecia, gestational alopecia, malignant alopecia, senile alopecia, alopecia totalis, alopecia areata multilocularis, ophiasis, drug-induced alopecia, cancer chemotherapy-induced alopecia and radiation exposure-induced alopecia, traumatic/mechanical alopecia, malnutrition/metabolic disorder associated alopecia, endocrine dysfunction associated alopecia and telogen effluvium (post partum alopecia, alopecia after high fever)).
(ii) Alopecia observed in skin lesion or pathologic skin (infection-induced alopecia, tumor-induced alopecia, inflammation-induced alopecia).
(iii) Scarring alopecia (skin infection-induced alopecia, alopecia induced by infiltration of inflammatory cells).
(Congenital Alopecia)
Diffuse alopecia, congenital atrichia, alopecia in hereditary syndromes, localized alopecia, phakomatosis, aplasia cutis, congenital alopecia triangularis.
It exerts an excellent effect especially on acquired alopecia, preferably on alopecia without accompanying scarring or skin lesion, more preferably on alopecia areata, male pattern alopecia, seborrheic alopecia, alopecia pityroides, female pattern alopecia, gestational alopecia, malignant alopecia, senile alopecia, alopecia totalis, alopecia areata multilocularis, ophiasis, drug-induced alopecia, cancer chemotherapy-induced alopecia and radiation exposure-induced alopecia, traumatic/mechanical alopecia, malnutrition/metabolic disorder associated alopecia, endocrine dysfunction associated alopecia and telogen effluvium. Therefore, the external preparation of the present invention can be used for the purpose of treating or preventing at least one or more alopecia selected from the above-mentioned group.
One simple application onto aforementioned affected site at 3 μg/ml to 500 μg/ml improved or eliminated itch, dandruff, scalp redness and inflammation immediately thereafter (immediate effect). A single application stimulated hair growth, grew hair, provided hair with resilience, elasticity and increased volume, and dramatically decreased falling hairs, and these effects started on the day after the application and persisted for one week or more (long-lasting effect). If application was carried on for about one week, these effects are further improved, and even after terminating application, the effects lasted from 1 to 2 weeks such that stimulation of hair growth and restoration of hair continued and there were little or no falling hairs.
9.2 Confirming Effects on Skin
The obtained cyclic peptide was prepared in purified water at 3, 15, 30, 100 or 500 μg/ml and applied to affected site. Each of formulations A to E in the table indicates the concentration of the cyclic peptide at 3, 15, 30, 100 or 500 μg/ml, respectively. The absence of the effect upon the application of purified water without the peptide confirmed the effect was not a placebo effect.
The result described above demonstrated that the cyclic peptide of the invention exhibits a similar effect as the cyclic peptide expressed by Formula I-a even if some amino acids of the cyclic peptide have been replaced. Moreover, a similar effect could be obtained by applying the replaced cyclic peptide in a mixture as long as an effective amount of the cyclic peptide is applied.
Specifically, in subjects having atopic dermatitis or eczema, effects were observed immediately after applying 3 μg/ml to 500 μg/ml to affected site, including elimination of itches, epithelialization at infiltrated site, papule or scratch, termination of exudation, epithelialization of a crack. Moreover, a single application induced a persistent effect for a week or more.
When it was applied to healthy or roughened skin, it exerted a moisturizing effect immediately or within a few minutes after application, improving dryness, providing and keeping skin and mucosa with moderate elasticity and flexibility, softening skin, giving skin or mucosa resilience and firmness. Also, fine wrinkles and flabbiness are improved at the applied site, and dullness and spots are further faded. A single application induced a persistent effect for a week or more.
9.3 Confirming Nasal Effect
The obtained cyclic peptide was prepared in physiological saline at 3, 15, 30, 100 or 500 μg/ml, and 0.1 ml each was applied to nasal cavity. Each of formulations A to E in the table indicates the concentration of the cyclic peptide at 3, 15, 30, 100 or 500 μg/ml, respectively. The absence of the effect upon the application of physiological saline without the peptide confirmed the effect was not a placebo effect.
The result described above demonstrated that the cyclic peptide of the invention exhibits a similar effect as the cyclic peptide expressed by Formula I-a even if some amino acids of the cyclic peptide have been replaced.
Specifically, when it was applied to nasal cavity mucosa and/or paranasal cavity mucosa, it can improve or prevent various symptoms associated with rhinitis such as nasal obstruction, rhinorrhea, sneezing and pruritus. Rhinitis also includes, without being particularly limited, for example, infectious rhinitis including acute rhinitis and chronic rhinitis; hypersensitive non-infectious rhinitis including combined (flower hypersensitivity) rhinitis, rhinitis with rhinorrhea, congestive rhinitis, edematous rhinitis and dry-nose type rhinitis; irritant-induced rhinitis including physical rhinitis, chemical rhinitis and radiation rhinitis; and atrophic rhinitis and idiopathic granulomatous rhinitis; sinusitis such as acute sinusitis, chronic sinusitis (maxillary empyema), eosinophilic sinusitis and paranasal cavity mycosis. The external preparation can be used for the purpose of treating or preventing one ore more of the above.
Combined rhinitis includes, for example, allergic rhinitis including perennial allergic rhinitis and seasonal allergic rhinitis, and nonallergic rhinitis including vasomotor (essential) rhinitis and eosinophilic rhinitis. Rhinitis with rhinorrhea includes, for example, gustatory rhinitis, cold air-induced rhinitis and senile rhinitis.
Congestive rhinitis includes, for example, drug-induced rhinitis, psychogenic rhinitis, gestational rhinitis, endocrine rhinitis and cold rhinitis.
Edematous rhinitis includes, for example, aspirin-hypersensitive rhinitis.
Among those mentioned above, it exerts an excellent effect specifically on hypersensitive non-infectious rhinitis, irritant-induced rhinitis and sinusitis, preferably on hypersensitive non-infectious rhinitis and chronic sinusitis, more preferably on combined (flower hypersensitivity) rhinitis, rhinitis with rhinorrhea, congestive rhinitis, edematous rhinitis and dry-nose type rhinitis, and chronic sinusitis. Therefore, the external preparation of the present invention can be used for the purpose of treating or preventing at least one or more rhinitis selected from the above-mentioned group.
In terms of its symptoms, for its effects as described above, it can be used for any of rhinitis with sneezing/rhinorrhea, rhinitis with nasal obstruction and rhinitis with both symptoms.
Immediately after a single application of 0.1 ml of 3 μg/ml to 500 μg/ml preparation was applied to the affected site in each nasal cavity, nasal discharge was stopped, nasal obstruction was improved, itches in nasal cavity mucosa or sneezing were stopped (immediate effect). A single application of a nasal drop induced persistent effects lasting for one day, or for a week or more in some cases (long-lasting effect). In addition, because it causes no local irritation at all, it can be used safely even in a subject who is not desired to use a nasal drop comprising rhinitis therapeutic that has conventionally been used such as steroid drug due to its strong local irritation.
Examples of multiple replaceable amino acids in the cyclic peptide of the invention are summarized below, based on working examples as described above, without not being limited thereto.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2015-110622 | May 2015 | JP | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/JP2016/065839 | 5/27/2016 | WO | 00 |
