WO2017150536A1 - ペプチド - Google Patents
ペプチド Download PDFInfo
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- WO2017150536A1 WO2017150536A1 PCT/JP2017/007812 JP2017007812W WO2017150536A1 WO 2017150536 A1 WO2017150536 A1 WO 2017150536A1 JP 2017007812 W JP2017007812 W JP 2017007812W WO 2017150536 A1 WO2017150536 A1 WO 2017150536A1
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- Prior art keywords
- peptide
- ghrelin
- food
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K38/00—Medicinal preparations containing peptides
- A61K38/04—Peptides having up to 20 amino acids in a fully defined sequence; Derivatives thereof
- A61K38/08—Peptides having 5 to 11 amino acids
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- C07K14/435—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
- C07K14/575—Hormones
- C07K14/60—Growth hormone-releasing factor [GH-RF], i.e. somatoliberin
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23J—PROTEIN COMPOSITIONS FOR FOODSTUFFS; WORKING-UP PROTEINS FOR FOODSTUFFS; PHOSPHATIDE COMPOSITIONS FOR FOODSTUFFS
- A23J3/00—Working-up of proteins for foodstuffs
- A23J3/04—Animal proteins
- A23J3/08—Dairy proteins
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES, NOT OTHERWISE PROVIDED FOR; PREPARATION OR TREATMENT THEREOF
- A23L33/00—Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof
- A23L33/10—Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof using additives
- A23L33/17—Amino acids, peptides or proteins
- A23L33/18—Peptides; Protein hydrolysates
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P3/00—Drugs for disorders of the metabolism
- A61P3/04—Anorexiants; Antiobesity agents
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- C07K14/435—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
- C07K14/46—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates
- C07K14/47—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates from mammals
- C07K14/4701—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates from mammals not used
- C07K14/4702—Regulators; Modulating activity
- C07K14/4703—Inhibitors; Suppressors
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- C07K14/435—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
- C07K14/46—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates
- C07K14/47—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates from mammals
- C07K14/4701—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates from mammals not used
- C07K14/4717—Plasma globulins, lactoglobulin
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K38/00—Medicinal preparations containing peptides
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K1/00—General methods for the preparation of peptides, i.e. processes for the organic chemical preparation of peptides or proteins of any length
- C07K1/12—General methods for the preparation of peptides, i.e. processes for the organic chemical preparation of peptides or proteins of any length by hydrolysis, i.e. solvolysis in general
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K16/00—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies
- C07K16/04—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies from milk
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2319/00—Fusion polypeptide
Definitions
- the present invention relates to a novel peptide.
- Ghrelin is a gastrointestinal hormone that has an appetite promoting action and a growth hormone secretion promoting action. Although suppression of ghrelin secretion is expected as a means to control overeating and obesity that have become a social problem in recent years, no means for suppressing ghrelin secretion has been reported so far.
- Patent Document 1 describes an appetite-suppressing peptide that promotes secretion of cholecystokinin (CCK), a gastrointestinal hormone having an appetite-suppressing action.
- CCK cholecystokinin
- Patent Document 1 describes an appetite-suppressing peptide that promotes secretion of cholecystokinin (CCK), a gastrointestinal hormone having an appetite-suppressing action.
- CCK cholecystokinin
- An object of the present invention is to provide a novel peptide having an inhibitory action on ghrelin secretion, and a medicine and a food containing the peptide.
- the present inventor has intensively studied to solve the above problems. As a result, a peptide having an inhibitory action on ghrelin secretion was found in a thermolysin digest of beta-lactoglobulin protein.
- the present invention has been completed based on such findings and further studies.
- Item 1 A peptide having the amino acid sequence LIVTQTMKG (SEQ ID NO: 1) at the N-terminus.
- Item 2. The peptide according to Item 1, derived from a thermolysin digest of milk ⁇ -lactoglobulin protein.
- Item 3. A pharmaceutical composition comprising the peptide according to Item 3, Item 1 or 2 as an active ingredient.
- Item 3. A ghrelin secretion inhibitor comprising the peptide according to item 4, item 1 or 2 as an active ingredient.
- Item 5. A food containing the peptide according to Item 1, Item 2 or Item 2.
- Item 6. A food comprising the peptide according to Item 1, Item 2 or Item 2.
- Item 8. A method for suppressing appetite, comprising the step of administering the peptide according to Item 8, Item 1 or 2, to a patient or a preparatory group in need.
- Item 9. The peptide according to Item 1 or 2, for suppressing appetite.
- Item 10. Use of the peptide according to Item 1 or 2 for producing a medicament or food that suppresses appetite.
- the pharmaceutical composition and food containing the peptide of the present invention as an active ingredient exert an appetite suppressing action based on the ghrelin secretion suppressing action. Based on these actions, it can be suitably used for prevention and treatment of overeating and obesity.
- the peptide of the present invention has low side effects and is suitable for long-term use.
- the pharmaceutical composition and food of the present invention are effective for oral administration.
- the peptide of the present invention is an enzyme digest of beta-lactoglobulin protein, side effects are not a problem. Moreover, since beta lactoglobulin protein is contained in milk in large quantities, it can be manufactured at low cost.
- the peptide of the present invention is a peptide having a 9-residue amino acid sequence of LIVTQTMKG (SEQ ID NO: 1) at the N-terminus.
- the peptide of the present invention is preferably 9 to 50 amino acid residues, more preferably 9 to 25 amino acid residues, still more preferably 9 to 15 amino acid residues, particularly preferably 9, 10, 11, 12, or 13 amino acid residues.
- the amino acid sequence shown in SEQ ID NO: 1 the 1st to 8th amino acid sequence, the 1st to 7th amino acid sequence, the 1st to 6th amino acid sequence, the 1st to 5th amino acid sequence, the 1st to 4th amino acid sequence, and A peptide consisting of the first to third amino acid sequences is also exemplified as another embodiment of the present invention.
- the amino acids constituting the peptide are L-form amino acids, D-form amino acids, or DL-form amino acids (the racemate and any amino acid in which either enantiomer is excessive if the D-form and L-form amino acids are mixed). Any of the above can be used.
- Preferable is a peptide consisting only of L-form amino acids or only D-form amino acids, particularly a peptide consisting only of L-form amino acids.
- the peptide used in the present invention when it contains two or more asymmetric carbons, it may be in the form of each enantiomer or diastereomer or a mixture of these in any ratio. Separation of enantiomers or diastereomers is carried out using a normal column, using an optically active column, introducing an optically active group and optically resolving it in the form of a derivative, and then removing the optically active group, Any known method such as a method of optical resolution by forming a salt with an optically active acid or base can be used.
- the peptide can have modifications.
- the amino terminus (N terminus) of the peptide may be a free amino group (NH 2 —), or may have a modification such as an acetyl group (CH 3 CO—).
- the carboxy terminus (C terminus) of the peptide may be a free carboxyl group (—COOH) or may have a modification such as an amide group.
- the amino acid residue of the peptide may be unmodified or may have a modification such as a phosphate group or a sugar chain.
- the peptide of the present invention may be a salt (acid addition salt or base salt).
- Acid addition salts include inorganic salts such as hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid, hydrobromic acid, perchloric acid, citric acid, succinic acid, maleic acid, fumaric acid, malic acid, tartaric acid, p-toluenesulfonic acid And salts of organic acids such as benzenesulfonic acid, methanesulfonic acid and trifluoroacetic acid.
- the base salt include alkali metal salts such as sodium, potassium and lithium, and alkaline earth metal salts such as calcium and magnesium.
- the peptide of the present invention may be a solvate.
- Solvates include solvates such as water (in the case of hydrates), methanol, ethanol, isopropanol, acetic acid, tetrahydrofuran, acetone, dimethylformamide, dimethyl sulfoxide, dimethylacetamide, acetamide, ethylene glycol, propylene glycol, and dimethoxyethane. Things.
- the peptide of the present invention can be obtained by hydrolysis of a natural protein (particularly ⁇ -lactoglobulin) or polypeptide, or by chemical synthesis.
- the peptide of the present invention can be obtained by hydrolyzing ⁇ -lactoglobulin contained in a large amount of whey protein derived from milk with thermolysin.
- Thermolysin is a known proteolytic enzyme (protease) derived from the thermostable bacterium Bacillus thermoproteolyticus (EC 3.4.24.4). Thermolysin can be used as a food additive in Japan. As thermolysin, commercially available products such as reagent grade and food additive grade can be used.
- thermolysin is not particularly limited as long as it contains ⁇ -lactoglobulin protein.
- milk itself, whey, purified ⁇ -lactoglobulin protein and the like can be mentioned.
- the reaction temperature can be appropriately selected from 30 to 70 ° C, 30 to 40 ° C, 40 to 70 ° C, 50 to 65 ° C, and the like.
- the reaction time can be appropriately selected from about 30 minutes to 48 hours, about 1 to 10 hours, and about 2 to 8 hours.
- the pH at which the reaction is carried out can be appropriately selected from about pH 6.5 to 8.5 and pH 7 to 8. In one preferred embodiment, the reaction can be performed for about 2 to 8 hours under conditions of a temperature of about 30 to 40 ° C. and a pH of 6.5 to 8.5 (particularly about pH 7.5).
- the peptide of the present invention may not be obtained under conditions where hydrolysis is excessive.
- trypsin is deactivated by heating to a temperature at which trypsin is deactivated (for example, heating at a temperature exceeding 80 ° C. for about 5 to 60 minutes).
- reaction product of hydrolysis may be used as it is, or an active ingredient peptide may be separated and used by purification.
- the peptide of the present invention can also be obtained by peptide synthesis. That is, in a liquid phase method or a solid phase method, which is a commonly used method for peptide synthesis, a method using an active ester such as HBTU, a raw material having a reactive carboxyl group and a raw material having a reactive amino group, or carbodiimide In a peptide synthesis such as a method using a coupling agent such as When the resulting condensate has a protecting group, it can also be produced by removing the protecting group.
- the C-terminal carboxyl group is a chlorotrityl resin, chloromethyl resin, oxymethyl resin, p- It is bound to a carrier such as an alkoxybenzyl alcohol resin.
- the condensation reaction is carried out in the presence of a condensing agent such as carbodiimide or using an N-protected amino acid active ester or peptide active ester.
- the protecting group is removed, but in the case of the solid phase method, the bond between the C-terminus of the peptide and the resin is further cleaved.
- the peptides of the present invention are purified according to conventional methods. Examples thereof include ion exchange chromatography, reverse phase liquid chromatography, affinity chromatography and the like. Synthesis of the synthesized peptide is analyzed by a protein sequencer that reads the amino acid sequence from the C-terminal by the Edman degradation method, GC-MS, or the like.
- the peptide of the present invention can also be synthesized by an enzymatic method (see WO2003 / 010307).
- the peptide of the present invention has an action of suppressing ghrelin secretion.
- Ghrelin is a biologically derived peptide having the following structure. Specifically, it consists of 28 amino acid residues, and the third serine residue is modified with n-octanoic acid. Ghrelin exhibits an appetite promoting action and a growth hormone secretion promoting action.
- the peptide of the present invention that suppresses ghrelin secretion also has an action based on suppression of ghrelin secretion such as an appetite suppression action. Based on the appetite suppressive action, the peptides of the present invention can be used for the prevention and treatment of overeating, obesity and the like.
- the fact that the peptide of the present invention promotes the secretion amount of ghrelin can be evaluated by methods known to those skilled in the art. For example, a test substance is added to the ghrelin-secreting cell MGN3-1 described in the literature: Iwakura ⁇ H et.al. Endocrinology. 2010 Jun; 151 (6): 2940-5, and ghrelin in the medium recovered after culturing for a predetermined time. The amount of ghrelin secreted can be measured by quantifying. Ghrelin can be quantified by an immunochemical technique such as ELISA (Enzyme-Linked ImmunoSorbent Assay).
- ELISA Enzyme-Linked ImmunoSorbent Assay
- the peptide of the present invention can be provided as a pharmaceutical composition or a food (food composition).
- the route of administration of the peptide of the present invention or a product containing the peptide is not particularly limited, and any of oral administration, parenteral administration, and rectal administration can be adopted, orally or parenterally. Can be administered. Among these, oral administration is preferable from the viewpoint of high effect.
- the dosage of this peptide varies depending on the administration method, the condition and age of the administered person, but is usually 0.01 mg / kg to 500 mg / kg, preferably 0.05 mg / kg to 100 mg / kg per adult day. More preferably, it is 0.1 to 30 mg / kg.
- the peptide (active ingredient) of the present invention can be administered in the form of a pharmaceutical composition prepared by mixing with a pharmaceutical carrier.
- a pharmaceutical carrier a substance that is commonly used in the pharmaceutical field and does not react with the peptide of the present invention is used.
- the peptide of the present invention can be used as a medicine or food per se, or alone or together with a suitable non-toxic carrier for ingestion, diluent or excipient (tablet, uncoated tablet, dragee, effervescent tablet, Film-coated tablets, chewable tablets, etc.), capsules, troches, powders, fine granules, granules, solutions, suspensions, emulsions, pastes, creams, injections (amino acid infusions, electrolyte infusions, etc.) Or a preparation for food or medicine such as sustained release preparations such as enteric tablets, capsules and granules.
- the content of the peptide in the food can be appropriately selected, but is generally in the range of 0.01 to 100% by weight.
- Examples of the dosage form include tablets, capsules, granules, powders, syrups, suspensions, suppositories, ointments, creams, gels, patches, inhalants, injections, and the like. These preparations are prepared according to a conventional method.
- the liquid preparation may be dissolved or suspended in water or other appropriate solvent at the time of use. Tablets and granules may be coated by a known method.
- injection it is prepared by dissolving the peptide of the present invention in water, but it may be dissolved in physiological saline or glucose solution as necessary, and a buffer or preservative may be added. Good.
- These preparations may contain the peptide of the present invention in a proportion of 0.01% to 100% by weight, preferably 1 to 90% by weight. These formulations may also contain other therapeutically valuable ingredients.
- an active ingredient and excipient components such as lactose, starch, crystalline cellulose, calcium lactate, anhydrous silicic acid and the like are mixed to form a powder, or if necessary, sucrose, Add a binder such as hydroxypropylcellulose and polyvinylpyrrolidone, a disintegrant such as carboxymethylcellulose and carboxymethylcellulose calcium, and wet or dry granulate to form granules.
- these powders and granules may be tableted as they are or after adding a lubricant such as magnesium stearate or talc.
- granules or tablets should be coated with an enteric solvent base such as hydroxypropylmethylcellulose phthalate or methacrylic acid-methyl methacrylate polymer and coated with an enteric solvent preparation, or with ethylcellulose, carnauba wax, hardened oil, etc. You can also.
- an enteric solvent base such as hydroxypropylmethylcellulose phthalate or methacrylic acid-methyl methacrylate polymer and coated with an enteric solvent preparation, or with ethylcellulose, carnauba wax, hardened oil, etc. You can also.
- powders or granules are filled into hard capsules, or active ingredients are dissolved as they are or dissolved in glycerin, polyethylene glycol, sesame oil, olive oil, etc., and then coated with a gelatin film to form soft capsules. Can do.
- an active ingredient and a sweetener such as sucrose, sorbitol, and glycerin are dissolved in water to add a transparent syrup, further essential oil, ethanol, etc. to make an elixir, Gum arabic, tragacanth, polysorbate 80, sodium carboxymethyl cellulose and the like may be added to form an emulsion or suspension.
- a transparent syrup such as sucrose, sorbitol, and glycerin
- Foods that can be prepared by adding and blending the peptides of the present invention include so-called health foods, functional foods, functional labeling foods, dietary supplements, supplements, foods for specified health use, foods for the sick, combinations for the sick It may be a food (Ministry of Health, Labor and Welfare, a kind of special-purpose food) or a food for the elderly (Ministry of Health, Labor and Welfare, a kind of special-purpose food). And chewable type, syrup type, drink type, etc.
- the preparation of food containing the peptide according to the present invention can be carried out by a method known per se.
- Ghrelin-secreting cells MGN3-1 were seeded in a 96-well plate at 1 ⁇ 10 5 cells / well and cultured in a medium for 24 hours. After culturing, the cells were washed with DPBS, and 100 ⁇ L of a test substance (Buffer: 50 ⁇ M sodium octanoate / DMEM) was added. Only the buffer to which no test substance was added was used as a control. After further culturing for 4 hours, the medium was collected and a supernatant was obtained by centrifugation. 10 ⁇ L of 1N HCl was added to the supernatant and stored at ⁇ 80 ° C.
- Buffer 50 ⁇ M sodium octanoate / DMEM
- the concentration of ghrelin in the sample was evaluated by ELISA (Bertin Pharma, Ghrelin (Acylated) EIA Kit A05117).
- ⁇ Production example> Enzyme digest
- Thermolysin manufactured by Amano Enzyme
- reaction temperature 37 ° C.
- reaction time 5 hours
- reaction pH 7.5.
- the sample was boiled (100 ° C., 10 minutes) to stop the enzyme reaction.
- peptide The peptide LIVTQTMKG (SEQ ID NO: 1; Example) was synthesized by a conventional method.
- Test Example 1 ⁇ -LG Thermolysin Digestion ⁇ -LG thermolysin digestion ( ⁇ -LG digest) was evaluated for effects on ghrelin secretion using ghrelin-secreting cells MGN3-1.
- thermolysin ⁇ -LG digested with thermolysin
- Test Example 2 The concentration dependence of the ghrelin secretion inhibitory action of the peptide peptide LIVTQTMKG (SEQ ID NO : 1) was verified.
- the dipeptide LI (comparative example), which is an N-terminal two residue, was also evaluated for the secretory effect of ghrelin.
- Test Example 3 Mechanism of Action The mechanism of action leading to the suppression of ghrelin secretion was verified. The effects of ⁇ -LG digested with thermolysin, peptide LIVTQTMKG (SEQ ID NO: 1) and dipeptide LI on the increase in cAMP concentration and intracellular calcium ion concentration ([Ca 2+ ]) by Forskolin were evaluated.
- ghrelin-secreting cells MGN3-1 were seeded at 1 ⁇ 10 5 cells / well in a 96-well plate and cultured in a medium for 24 hours. After culturing, the cells were washed with DPBS, and 45 ⁇ L of a test substance (Buffer: Krebs Ringer HEPES buffer containing 0.5 mM IBMX and 0.01 mM Forskolin) was added. After further incubation for 30 minutes, intracellular cAMP was quantified using HitHunter cAMP Assay for small molecules (DiscoveRx).
- Buffer Krebs Ringer HEPES buffer containing 0.5 mM IBMX and 0.01 mM Forskolin
- the intracellular calcium ion concentration was measured according to the method described in the literature: Kagebayashi Tet.al. Mol. Nutr. Food Res. 2012 Sep; 56 (9): 1456-63.
- Test Example 4 Administration to living body Peptide LIVTQTMKG (SEQ ID NO: 1) was administered to mice (ddY mice, male, 34 to 40 g), and the influence on blood concentration of ghrelin was evaluated. Specifically, the peptide LIVTQTMKG (SEQ ID NO: 1) dissolved in physiological saline was orally administered (0.3 mg / kg or 1 mg / kg po) to mice fasted 18 hours before administration. After a time, the serum ghrelin concentration was measured (Measure of plasma ghrelin).
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Abstract
Description
項1、N末端にアミノ酸配列LIVTQTMKG(配列番号1)を有するペプチド。
項2、牛乳βラクトグロブリンタンパク質のサーモリシン消化物に由来する、項1に記載のペプチド。
項3、項1または2に記載のペプチドを有効成分とする医薬組成物。
項4、項1または2に記載のペプチドを有効成分とするグレリン分泌抑制剤。
項5、項1または2に記載のペプチドを含有する食品。
項6、項1または2に記載のペプチドを添加することを特徴とする食品。
項7、食欲抑制のための、項5または6に記載の食品。
項8、項1または2に記載のペプチドを必要とする患者または予備群に投与する工程を含む、食欲を抑制する方法。
項9、食欲を抑制するための、項1または2に記載のペプチド。
項10、 食欲を抑制する医薬または食品を製造するための、項1または2に記載のペプチドの使用。
(グレリン分泌活性の評価)
グレリン分泌細胞MGN3-1を96ウェルプレートに1 x 105 cells/well播種し、培地中で24時間培養した。培養後、細胞をDPBSで洗浄し、試験物質100μL(Buffer:50 μM sodium octanoate/DMEM)を添加した。なお、試験物質を添加しないBufferのみをcontrolとした。さらに4時間培養をした後に、培地を回収し遠心分離処理により上清(supernatant)を得た。上清に1N HClを10μL添加し、-80℃で保存をした。
(酵素消化物)
精製した牛乳βラクトグロブリン(β-LG)タンパク質と消化酵素とを、酵素:β-LG=1:100(重量比、β-CGの終濃度:10mg/ml)で混合し、添付のバッファー中で反応を行った。
(i)サーモリシン(天野エンザイム社製);反応温度:37℃、反応時間:5時間;反応pH:7.5。
定法により、ペプチドLIVTQTMKG(配列番号1;実施例)を合成した。
試験により得られたデータを、試行数nの平均(Mean)と標準誤差(Standard error of the mean、SEM)との和(Mean±SEM)で表した。データを1方向または2方向ANOVAにより解析し、引き続いて多重比較のためのTukey-Kramer試験を行った。p<0.05の場合(図中、”*”)及びp<0.01の場合(図中、”**”)に、有意差ありと判定した。
試験例1:β-LGのサーモリシン消化物
β-LGのサーモリシン消化物(β-LG digest)について、グレリン分泌細胞MGN3-1を用いて、グレリン分泌に与える影響を評価した。
ペプチドLIVTQTMKG(配列番号1)の、グレリンの分泌抑制作用の濃度依存性を検証した。N末端の2残基であるジペプチドLI(比較例)についても、グレリンの分泌抑制作用を評価した。
試験例2で用いたペプチドLIVTQTMKG(配列番号1)及びジペプチドLIが、β-LGのサーモリシン消化物に含まれることを質量分析法により確認した。結果を表1に示す。
グレリンの分泌抑制に至る作用機構を検証した。β-LGのサーモリシン消化物、ペプチドLIVTQTMKG(配列番号1)及びジペプチドLIが、ForskolinによるcAMP濃度上昇及び細胞内カルシウムイオン濃度([Ca2+])に与える影響を評価した。
マウス(ddYマウス、雄、34~40g)にペプチドLIVTQTMKG(配列番号1)を投与して、グレリンの血中濃度への影響を評価した。具体的には、投与18時間前から絶食(fasting)させたマウスに、生理食塩水に溶解したペプチドLIVTQTMKG(配列番号1)を0.3mg/kgまたは1mg/kg経口投与(p.o.)して、1時間後に血清中のグレリン濃度を測定(Measure of plasma ghrelin)した。
Claims (10)
- N末端にアミノ酸配列LIVTQTMKG(配列番号1)を有するペプチド。
- 牛乳βラクトグロブリンタンパク質のサーモリシン消化物に由来する、請求項1に記載のペプチド。
- 請求項1または2に記載のペプチドを有効成分とする医薬組成物。
- 請求項1または2に記載のペプチドを有効成分とするグレリン分泌抑制剤。
- 請求項1または2に記載のペプチドを含有する食品。
- 請求項1または2に記載のペプチドを添加することを特徴とする食品。
- 食欲抑制のための、請求項5または6に記載の食品。
- 請求項1または2に記載のペプチドを必要とする患者または予備群に投与する工程を含む、食欲を抑制する方法。
- 食欲を抑制するための、請求項1または2に記載のペプチド。
- 食欲を抑制する医薬または食品を製造するための、請求項1または2に記載のペプチドの使用。
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| EP17760002.0A EP3424943A4 (en) | 2016-02-29 | 2017-02-28 | PEPTIDE |
| JP2018503332A JP6958864B2 (ja) | 2016-02-29 | 2017-02-28 | ペプチド |
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| JPWO2020250923A1 (ja) * | 2019-06-11 | 2020-12-17 | ||
| EP3916006A1 (en) | 2020-05-26 | 2021-12-01 | Consejo Superior de Investigaciones Científicas (CSIC) | Peptides capable of inducing anorexic hormones, compositions and uses thereof |
| CN114129704A (zh) * | 2021-11-23 | 2022-03-04 | 中国药科大学 | 一种乳源性寡肽在制备防治糖尿病及糖尿病并发症药物中的应用 |
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| JPWO2020250923A1 (ja) * | 2019-06-11 | 2020-12-17 | ||
| WO2020250923A1 (ja) | 2019-06-11 | 2020-12-17 | 味の素株式会社 | ペプチド及びその用途 |
| JP7726067B2 (ja) | 2019-06-11 | 2025-08-20 | 味の素株式会社 | ペプチド及びその用途 |
| EP3916006A1 (en) | 2020-05-26 | 2021-12-01 | Consejo Superior de Investigaciones Científicas (CSIC) | Peptides capable of inducing anorexic hormones, compositions and uses thereof |
| WO2021239642A1 (en) | 2020-05-26 | 2021-12-02 | Consejo Superior De Investigaciones Cientificas (Csic) | Peptides capable of inducing anorexic hormones, compositions and uses thereof |
| CN114129704A (zh) * | 2021-11-23 | 2022-03-04 | 中国药科大学 | 一种乳源性寡肽在制备防治糖尿病及糖尿病并发症药物中的应用 |
| CN114129704B (zh) * | 2021-11-23 | 2023-12-15 | 中国药科大学 | 一种乳源性寡肽在制备防治糖尿病及糖尿病并发症药物中的应用 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2017150536A1 (ja) | 2018-12-27 |
| JP6958864B2 (ja) | 2021-11-02 |
| EP3424943A1 (en) | 2019-01-09 |
| EP3424943A4 (en) | 2019-08-14 |
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