WO2005056784A1 - インスリン誘導性ポリペプチド - Google Patents
インスリン誘導性ポリペプチド Download PDFInfo
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- WO2005056784A1 WO2005056784A1 PCT/JP2004/019153 JP2004019153W WO2005056784A1 WO 2005056784 A1 WO2005056784 A1 WO 2005056784A1 JP 2004019153 W JP2004019153 W JP 2004019153W WO 2005056784 A1 WO2005056784 A1 WO 2005056784A1
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- Prior art keywords
- polypeptide
- insulin
- amino acid
- blood glucose
- inducible
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N9/00—Enzymes; Proenzymes; Compositions thereof; Processes for preparing, activating, inhibiting, separating or purifying enzymes
- C12N9/10—Transferases (2.)
- C12N9/12—Transferases (2.) transferring phosphorus containing groups, e.g. kinases (2.7)
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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 COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- 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
-
- 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
- A61P3/08—Drugs for disorders of the metabolism for glucose homeostasis
- A61P3/10—Drugs for disorders of the metabolism for glucose homeostasis for hyperglycaemia, e.g. antidiabetics
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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
Definitions
- the invention of this application relates to insulin-inducible polypeptides and oral compositions. More specifically, the invention of this application relates to a polypeptide having an insulin-inducing / hyperglycemic effect when administered orally, and a composition containing the polypeptide, such as a functional food or a therapeutic agent for diabetes. .
- Diabetes is a disease associated with an increase in blood sugar levels caused by absolute deficiency of insulin, a hormone secreted by the knee 3 cells (type 1 diabetes), or relative deficiency and insufficient action (type 2 diabetes). It is one of the most common problems in developed countries. Insulin administration is widely used as a treatment, but it is not always safe due to side effects due to a rapid blood glucose lowering effect. For this reason, the development of antidiabetic drugs using ingredients that replace insulin has been promoted. The components of such a therapeutic agent for diabetes are widely selected from various organic and inorganic compounds, and therapeutic agents for diabetes containing proteins and peptides as active ingredients have been proposed.
- Patent Document 1 For example, application of GLP-1 analog or its peptide to the treatment of diabetes (Patent Document 1), therapeutic agent for diabetes containing activin or its partial peptide (Patent Document 2), -C-terminal peptide of endorphin as an active ingredient And other therapeutic agents for diabetes (Patent Document 3).
- Nattokinase is an enzyme (protease) produced by Bacillus subtilis (Bacillus sbtilis), and an invention utilizing its thrombolytic effect (Patent Document 4) is known.
- Patent literature there is no known link between the nut-kinase and insulin induction and blood sugar lowering or hyperglycemic ameliorating effects.
- Drugs containing a protein or a peptide as an active ingredient are superior in safety compared to drugs containing a compound as an active ingredient, but proteins and peptides are administered orally. Is generally degraded in the digestive tract, so it is generally used by other routes of administration (eg, blood injection).
- diabetes is a disease in which daily medication can be used to administer medication when needed, and a drug for treating diabetes with a simpler dosage form (ie, oral administration) without resorting to excessive burdensome injections.
- the invention of this application has been made in view of the circumstances described above, and has as its object to provide a polypeptide having excellent insulin-inducing ability, and a composition containing this polypeptide.
- This application is directed to a first invention for solving the above-mentioned problem, which is a partial peptide of Bacillus subtilis nut kinase, which is located at the C-terminal side from the twentieth amino acid to the N-terminal amino acid sequence of the amino acid sequence constituting the nut kinase Amino acid sequence of 50 or more amino acids consecutive Or an insulin-inducible polypeptide having a sequence in which a plurality of amino acid residues in the sequence have been deleted, added, or substituted with another amino acid residue.
- One specific embodiment of the insulin-inducible polypeptide of the first invention is that the amino acid sequence constituting the nattokinase is SEQ ID NO: 2.
- This application also provides, as a second invention, an oral composition containing the insulin-inducing polypeptide.
- the present invention further provides, as a third invention, a method for treating diabetes, which comprises orally administering the insulin-inducing polypeptide of the first invention, and, as a fourth invention, an oral composition of the second invention Provide a method for treating diabetes, which is characterized by ingesting a diet. That is, the inventor of the present application has reported that a partial peptide of Bacillus subtilis nattokinase exhibits excellent insulin-inducing properties and accompanying blood glucose-lowering action when administered orally to a diabetic model animal. And completed this invention.
- insulin induction is broadly defined, and for example, functionally means that insulin lowers blood glucose levels. Alternatively, it means promotion of insulin secretion, including activation of the insulin gene in the arm / 3 cells, promotion of conversion of insulin precursor protein (proinsulin) expressed from the insulin gene to insulin, and the like.
- protein or “polypeptide” refers to a molecule composed of a plurality of amino acid residues linked to each other by a natural amide bond (peptide bond) or a residue linkage other than the natural amide bond. .
- polynucleotide refers to a phosphate ester of a nucleoside in which a purine or pyrimidine is / 3-N-glycosidically linked to a sugar (ATP, GTP, CTP, UTP; or dATP, dGTP, dCTP, dTTP) is a molecule linked by 100 or more.
- ATP ATP, GTP, CTP, UTP; or dATP, dGTP, dCTP, dTTP
- genomic DNA encoding the protein
- mRNA transcribed from the genomic DNA and cDNA synthesized from the mRNA. It may be double-stranded or single-stranded.
- the sense strand and antisense strand of these genomic DNAs, mRNAs and cDNAs are also included.
- FIG. 1 shows the insulin-inducible polypeptides of the present invention (NK1-381, NK20-381, NK20-326) administered orally and tail intravenously to type I diabetes model mice (STZ mice) at 0 minutes and A graph comparing the blood glucose level after 60 minutes, and a graph (upper right) comparing the blood glucose level after 60 minutes when the blood glucose level after 0 minute is set to 100.
- Figure 2 shows the graph of blood glucose changes over time up to 80 minutes after oral administration of polypeptide (left), and the degree of change when the blood glucose level at 0 minutes in each group was 100.
- FIG. 1 shows the insulin-inducible polypeptides of the present invention (NK1-381, NK20-381, NK20-326) administered orally and tail intravenously to type I diabetes model mice (STZ mice) at 0 minutes and A graph comparing the blood glucose level after 60 minutes, and a graph (upper right) comparing the blood glucose level after 60 minutes when the blood glucose level after 0
- FIG. 3 shows a graph (right) showing the time-course blood glucose changes up to 80 minutes after intravenous injection of the polypeptide tail into STZ mice, and a comparison of the left figure in FIG.
- FIG. 4 is a graph comparing the plasma concentration of insulin 2 in STZ mice to which the polypeptide was orally administered or injected into the tail.
- FIG. 5 is a graph showing the time course of blood glucose levels when the insulin-inducing polypeptide (NK20-326) of the present invention and PBS (control) were orally administered to STZ mice.
- FIG. 6 is a graph showing the time course of blood glucose levels when the polypeptide NK20-69 was orally administered to STZ mice.
- FIG. 7 is a graph showing the time course of blood glucose level when the polypeptide NK20-119 was orally administered to STZ mice.
- FIG. 8 is a graph showing the change over time in blood glucose level when the polypeptide NK20-219 was orally administered to STZ mice.
- FIG. 9 is a graph showing the time course of blood glucose levels when the polypeptide NK40-219 was orally administered to STZ mice.
- FIG. 10 is a graph showing a time-dependent change in blood glucose level when 1/10 amount of the polypeptide NK20-219 was orally administered to STZ mice.
- FIG. 11 is a graph showing the time course of blood glucose levels when PBS (control) was orally administered to STZ mice.
- FIG. 12 is a graph showing the time course of blood glucose level when PBS (control) was orally administered to a type II diabetes model mouse (db / db mouse).
- FIG. 13 is a graph showing the time course of blood glucose levels when the polypeptide NK20-219 was orally administered to db / db mice.
- the insulin-inducible polypeptide of the first invention comprises at least 50 consecutive amino acids from the 20th amino acid to the C-terminal side of the amino acid sequence constituting the Bacillus subtilis nattokinase.
- Various types of nattokinase are known, and any of them can be used without limitation. According to the present invention, a nattokinase whose amino acid sequence is shown in SEQ ID NO: 2 is provided as an example.
- the insulin-inducible polypeptide of the present invention is required to include, for example, at least 50 consecutive amino acids from the 20th amino acid (Met) to the C-terminal side from the N-terminal in SEQ ID NO: 2 (381 amino acids). As such, it can be of any length.
- the polypeptide may have a sequence in which a plurality of amino acid residues are deleted, added, or substituted with other amino acid residues as long as the ability to induce insulin is not impaired. In this case, the plurality is, for example, about 1 to 30 pieces.
- the amino acid sequence from the 20th to the 26th to 40th positions on the N-terminal side is essential for insulin inducibility.
- Such a polypeptide can be prepared by a known peptide synthesis method (Merrifield, RBJ Solid phase) based on the known amino acid sequence of Bacillus subtilis nuttokinase (for example, SEQ ID NO: 2 or the amino enzyme sequence disclosed in GenBank / AF368283).
- peptide synthesis I. The synthesis of tetrapeptide. J. Amer. Chem. Soc. 85, 2149-2154, 1963; Fmoc Solid Phase Peptide Synthesis. A Practical Approach. Chan, WC and White, PD, Oxford University Press, 2000). Further, for example, it can be performed automatically by using ABI431A peptide synthesizer (Perkin Elmer) or the like.
- Such synthetic polypeptides may consist of residue linkages other than natural amide bonds, or may consist of non-natural residues in place of natural amino acid residues.
- Residue linkages other than the natural amide bond include, for example, glutaraldehyde, N-hydroxysuccinimide ester, bifunctional maleimide, N, N, -dicyclohexylcarboximide (DCC), or ⁇ , ⁇ , -diisopropylcarpoimide. Examples include chemical bonding or coupling means such as diimide (DIC).
- unnatural amino acid residues include, for aromatic amino acids, for example, D- or L-naphylalanine; D- or L-phenylglycine; D- or L-2 thieneylalanine.
- Aromatic rings of unnatural amino acids include, for example, thiazolyl, thiophenyl, pyrazolyl, benzimidazolyl, naphthyl, furanyl, pyrrolyl, and pyridyl aromatic rings.
- an acidic amino acid it can be produced, for example, by substitution with a non-ruvonate amino acid maintaining a negative charge; (phosphono) alanine; sulfated threonine.
- the carboxyl side group (for example, aspartyl or glutamyl) may also be used, for example, for 1-cyclohexyl-3 (2-morpholinyl- (4-ethyl) carbodiimide or 1-ethyl-3 (4-azonia-4,4-dimethyl). It can be selectively modified by reaction with carpoimide (R, -NCNR>) such as (tolpentyl) carpoimide, etc.
- Aspartyl or Dalya mill can also be modified by reaction with ammonium ion, asparaginyl and ⁇ Can be converted to a glutaminyl residue
- Basic amino acids include, for example, amino acids (in addition to lysine and arginine), ordinine, citrulline, or (guadino) -acetic acid, or alkyl as defined above. It can be formed by substitution with a (guanidino) alkyl acetic acid. , Containing a CN- moiety in place of COOH) can be substituted for asparagine or glutamine.Asparaginyl and glutamine residues are deaminated to the corresponding aspartyl or daltamyl residues.
- the unnatural arginine residue can be substituted with arginyl, for example, one or more, such as phenyldalioxal, 2,3-butanedione, 1,2-cyclohexanedione, or ninhydrin.
- arginyl for example, one or more, such as phenyldalioxal, 2,3-butanedione, 1,2-cyclohexanedione, or ninhydrin.
- tyrosyl is formed, for example, by reacting with an aromatic diazonium compound or tetranitromethane. N-Acetylimidizole and tetranitromethane are each 0-acetylti.
- Non-natural cysteine residues can be formed using rosinyl and 3-nitro derivatives, cysteinyl residues, ⁇ -haloacetates such as 2-chloroacetic acid, or chloroacetamides and equivalents. Carboxymethyl or carboxamidomethyl derivatives.
- Non-natural cysteine residues also include cysteinyl residues such as, for example, pro-trifluoroacetic acid, a-bromo- / 3- (5-dimidazolyl) propionic acid; chloroacetylphosphato, N-alkylmaleimide, 3-nitro- 2-pyridyl disulfide; methyl 2-pyridyl sulfide; P-co mouth mercury benzoic acid; 2-chloromercury-4 nitrophenol; or chloro mouth-7-nitrobenzoxoxa-1, It can be produced by reacting with 3-diazole.
- cysteinyl residues such as, for example, pro-trifluoroacetic acid, a-bromo- / 3- (5-dimidazolyl) propionic acid; chloroacetylphosphato, N-alkylmaleimide, 3-nitro- 2-pyridyl disulfide; methyl 2-pyridyl sulfide; P-co mouth mercury benzo
- Unnatural lysine can be generated (and the amino terminal residue is altered) by reacting ricinyl with, for example, succinic or other carboxylic anhydrides.
- Lysine and other mimetic amino-containing residues also include methyl picoline imidate, pyridoxal phosphate, pyridoxal, chloroborohydride, trinitrobenzene sulfonic acid, 0-methyl isourea, 2,4 It can be produced by a reaction using imidoesters such as thiophene and a reaction using daloxylate catalyzed by transamidase.
- Non-natural methionine can be produced, for example, by a reaction using methionine sulfoxide.
- Unnatural prolines include, for example, pipecolic acid, thiazolidinecarboxylic acid, 3- or 4-hydroxyproline, dehydroxyproline, 3- or 4-methylproline, or 3,3, -dimethylproline.
- Unnatural histidine can be produced by reacting histidine with, for example, getyl procarbonate or para-bromophenacyl bromide.
- Other unnatural amino acid residues include, for example, hydroxylation of proline and lysine; phosphorylation of the hydroxyl group of seroyl or threonyl residues; methylation of the 0!
- the insulin-inducible polypeptide of the present invention can also be obtained by a genetic engineering method using a polynucleotide encoding the same.
- RNA is prepared by in vitro transcription from a recombinant expression vector carrying a polynucleotide, and this is used as a type III protein for in vitro translation to obtain the desired RNA.
- Surin-inducible polypeptides can be obtained.
- insulin-inducible cells when a recombinant expression vector is introduced into prokaryotic cells such as Escherichia coli and Bacillus subtilis, and eukaryotic cells such as yeast, insect cells, and mammalian cells to produce transformed cells, insulin-inducible cells can be produced from the transformed cells.
- the polypeptide can be expressed.
- the polynucleotide for genetically expressing the insulin-inducible polypeptide is a known sequence encoding Bacillus subtilis nattokinase (for example, SEQ ID NO: 1).
- nattokinase cDNA using, for example, probe hybridization for the cDNA library or the PCR method, and transcribe the insulin-inducible polypeptide coding region from the nattokinase cDNA. It can be cut out with restriction enzymes and used. Alternatively, a polynucleotide encoding an insulin-inducible polypeptide can be obtained by known methods (for example, Carruthers
- RNA polymerase promoter examples include T7, T3, and SP6.
- RNA polymerase promoters examples include pKAl, pCDM8, pT3 / T718, ⁇ 7 / 319, pBluescript II and the like.
- a polynucleotide To express insulin-inducible polypeptides in microorganisms such as Escherichia coli, a polynucleotide must be used in a vector having an origin, a promoter, a ribosome binding site, a DNA cloning site, a terminator, etc., which can be replicated in microorganisms.
- the polypeptide encoded by the polynucleotide is expressed in a large amount in a microorganism. be able to.
- the desired polypeptide can be obtained by separation.
- the expression vector for Escherichia coli include a pUC system, pBluescript II, a pET expression system, and a pGEX expression system.
- the polynucleotide When the insulin-inducible polypeptide is expressed in eukaryotic cells, the polynucleotide is inserted into a eukaryotic expression vector having a promoter, a splicing region, and a poly (A) addition site. If a recombinant vector is prepared and introduced into eukaryotic cells, the desired polypeptide can be expressed in transformed eukaryotic cells.
- Expression vectors pKAl, pCDM8, pSVK3, pMSG , pSVL, pBK-CMV, pBK-RSV, EBV vector, pRS, pcDNA3, pMSG, such as pYES2 can be exemplified c Also, pIND / V5-His, pFLAG -CMV- 2. If pEGFP-Nl, pEGFP-Cl, etc. are used as expression vectors, polypeptides can be expressed as fusion proteins with various tags such as His tag, FLAG tag, myc tag, HA tag, GFP, etc. it can.
- mammalian cultured cells such as monkey kidney cells COS7, Chinese hamster ovary cells CHO, etc., budding yeast, fission yeast, silkworm cells, African Xenopus egg cells, etc.
- Any eukaryotic cell can be used.
- known methods such as an electroporation method, a calcium phosphate method, a ribosome method, and a DEAE dextran method can be used.
- the target peptide After expressing the insulin-inducible polypeptide in prokaryotic or eukaryotic cells, the target peptide can be isolated and purified from the culture by a combination of known separation procedures.
- treatment with denaturing agents such as urea or surfactants, ultrasonic treatment, enzyme digestion, salting-out / solvent precipitation, dialysis, centrifugation, ultrafiltration, gel filtration,
- denaturing agents such as urea or surfactants
- ultrasonic treatment enzyme digestion
- salting-out / solvent precipitation dialysis
- centrifugation ultrafiltration
- gel filtration examples include SDS-PAGE, isoelectric focusing, ion exchange chromatography, hydrophobic chromatography, affinity chromatography, reverse phase chromatography, and the like.
- the insulin-inducing polypeptide as described above can be formulated into an oral drug by itself. In that case, the polypeptide may be in the form of a “salt”.
- Salts include, for example, pharmaceutically acceptable acid (inorganic or organic acids) addition salts, for example, hydrochloride, hydrobromide, sulfate, nitrate, acetate, benzonitrate, maleate, fumarate Succinate, tartrate, citrate, oxalate, methanesulfonate, tolenesulfonate, aspartate, glutamate, etc.
- the second invention of this application is an oral composition containing the insulin-inducible polypeptide described above. This composition is a composition having a form in which it is ingested from the oral cavity and absorbed in the digestive tract, for example, a food and drink department, an oral pharmaceutical and the like.
- the insulin-inducible polypeptide of the present invention is a part of nattokinase contained in natto, which is widely taken as a food, so that there is no problem in safety as a food or drink or a component of a drug.
- a therapeutic agent for diabetes for example, it is preferable to formulate tablets, capsules, granules, fine granules, powders, or oral liquid preparations such as suspensions and mouthwashes.
- Carriers include common pharmaceutical auxiliaries such as binders (syrup, gum arabic, gelatin, sorbitol, tragacanth, polyvinylpyrrolidone, hydroxypropylcellulose, etc.), excipients (lactose, sugar, corn starch, phosphoric acid) Calcium, sorbitol, glycine, etc.), lubricants (magnesium stearate, talc, polyethylene glycol, silica, etc.), disintegrants (potato starch, carboxymethylcell mouth, etc.), wetting agents (sodium lauryl sulfate, etc.) Can be used. Flavors such as Strawberry 'Flapper and Peppermint can also be added.
- Oral solutions can be aqueous solutions or dry products. Such oral solutions may contain conventional additives, for example preservatives (methyl or hydroxypropyl benzoate or pill, sorbic acid, etc.).
- the content of the insulin-inducing polypeptide, which is a medicinal component, can be appropriately determined depending on the severity of the symptoms and the dosage form, but is usually 5 to: 000% (w / w), preferably 10 to 60%. (w / w).
- the dose of the drug varies depending on the age, weight, symptoms, etc. of the patient, but can be about 100 to 200 mg / kg / day as the amount of the insulin-inducing polypeptide.
- a composition such as a food or drink
- it can be produced by blending an insulin-inducing polypeptide so as not to impair its activity in the process of producing an existing product.
- foods and drinks include, for example, beverages such as soft drinks, nutritional drinks, fruit drinks, and lactic acid drinks (including concentrated stock solutions and Z or prepared powders for preparing these drinks); ice cream , Sorbet and other frozen desserts; buckwheat, udon, bread, rice cake, rind skin, and other processed cereals; candy, candy, chocolate, snacks, biscuits, cookies, crackers, jellies, jams, etc .; kamaboko , Ham, ham, sausage, etc., marine and livestock processed foods; processed milk, cheese, pauna etc., dairy products; margarine, lard, mayonnaise, etc., oils and fats and processed foods; soy sauce, sauce, miso , Ponzu, kelp soup, soup ingredients, seasonings; various prepared foods; pickles; other various forms of
- the therapeutic agent comprising the above-mentioned insulin-inducing polypeptide and the oral composition containing the insulin-inducing polypeptide normalize the blood glucose level of diabetic patients, impaired glucose tolerance, diabetes (type II diabetes, etc.) , Insulin resistance syndrome (insulin receptor abnormalities etc.), polycystic ovary syndrome, hyperlipidemia, atherosclerosis, cardiovascular diseases (angina pectoris, heart failure etc.), hyperglycemia, hypertension, Angina, pulmonary hypertension, congestive heart failure, diabetic complications (e.g. diabetic gangrene, diabetic arthropathy, diabetic glomerulosclerosis, diabetic skin disorder, diabetic neuropathy, diabetic cataract, It is effective in the prevention and treatment of skin disorders, taste disorders, etc.
- insulin-inducing polypeptide normalize the blood glucose level of diabetic patients, impaired glucose tolerance, diabetes (type II diabetes, etc.) , Insulin resistance syndrome (insulin receptor abnormalities etc.), polycystic ovary syndrome, hyperlipidemia
- NK nattokinase
- genomic DNA is prepared from Bacillus subtilis natto using the Dneasy Tissue Kit (QUIAGEN), and the full length KN gene cDNA is amplified by PCR using this as ⁇ type.
- a PCR primer was designed on the basis of a known NK mRNA sequence (GenBank / AY219901: SEQ ID NO: 1), and genomic DNA was used as type III and PCR was performed using KODplus (TOYOBO). After confirming the molecular weight of the PCR product by electrophoresis, it was cloned into PPCR-Script vector (INVITROGEN) and the sequence was confirmed.
- the polypeptide was prepared using an in vitro transcription and translation system (cell-free system). Insert the 4 types of NK cDNAs with the stop codon removed and His tag sequence added into the EcoRV / XhoI site of the pEU3-NII vector attached to the PROTEIOS Wheat germ cell-tree protein synthesis core kit manufactured by TOYOBO did.
- Expression vectors were constructed using cDNAs encoding NK polypeptides (NK20-326) from which amino acids were deleted as inserts.
- mRNA was transcribed by reacting with TOYOBO Thermo T7 RNA polymerase (150U) at 37 for 4 hours, and after confirmation by electrophoresis, the transcribed mRNA (12 Hg) was used for 26 to 24 hours.
- TOYOBO Thermo T7 RNA polymerase 150U
- the transcribed mRNA (12 Hg) was used for 26 to 24 hours.
- Four kinds of polypeptides were obtained by translation reaction. The obtained polypeptide was confirmed by SDS-PAGE and electrophoresis followed by bearish-able staining.
- the fusion polypeptide was confirmed by Western blotting using a His tag antibody.
- a 5-week-old C57BL / 5 male mouse was intraperitoneally administered with 2 mg of STZ (streptozodocin) to produce a type 1 diabetes (insulin deficient) model mouse.
- the blood glucose level after fasting at 12 weeks of age for 3 hours reached approximately 400 mg / dl.
- the fasting blood glucose level was measured, and then a 2 g / kg glucose load (oral administration of sugar water using a gastric tube) was performed.
- Blood glucose was measured from the orbital venous plexus of the mouse using a capillary by using Redal Test Ace (GT-1640: manufactured by Sanwa Chemical Laboratory).
- NK polypeptides (NK1-381, NK20-381, NK20-326) were orally administered to STZ mice.
- the polypeptide was suspended in PBS (Phosphate Buffer Saline) and administered at about 0.5 g / 50 z1 per animal. Thereafter, the blood glucose level was measured every .20 minutes until 120 minutes later, and the mice that had completed the measurement collected whole blood by cardiac blood sampling.
- each polypeptide was injected intravenously (tail vein) (about 0.5 g / 50 / il) to STZ mice.
- the test time was the same as for the oral administration except that the fasting time of the mice was 24 hours and the blood glucose measurement after intravenous injection was 30 minutes and 60 minutes later.
- FIG. 1 is a graph comparing the blood glucose levels of the polypeptides (NK1-381, NK20-381, NK20-326) at 0 minutes and 60 minutes after intravenous injection of the tail. As is evident from FIG. 1, the polypeptide significantly reduced blood glucose 60 minutes after oral administration when compared to intravenous injection. These results show changes in blood glucose over time up to 80 minutes after administration of the polypeptide. (Oral administration) and Figure 3 (intravenous tail injection). As shown in Fig. 2, in the case of oral administration, blood glucose levels decreased in the order of NK20-381, NK1-381, and NK20-326, but no significant difference was found.
- NK20-326 was used as the polypeptide. This polypeptide NK20-326 was suspended in PBS and orally administered to STZ mice at a dose of 40 g / 0.2 ml. Specifically, after fasting for 19 hours, orally administer the polypeptide NK20-326 30 minutes after a 2 g / kg glucose load, and measure the blood glucose level at 1 hour, 2 hours, 4 hours, and 8 hours did. As a control, 0.2 ml of PBS was administered under the same conditions as the sample, and the blood glucose level was measured at the same time.
- Table 1 (upper left) shows the weight of five STZ mice, and Table 1 (upper right) shows the blood glucose level (mg / dl) immediately before NK20-326 administration.
- the other values in Table 1 are the blood glucose levels of each mouse at 1 hour (middle left), 2 hours (middle right), 4 hours (lower left), and 8 hours (lower right) after administration of NK20-326.
- Table 2 shows the results of the control (oral administration of PBS) in the same manner as in Table 1.
- Figure 5 is a graph of the results in Tables 1 and 2.
- the STZ mouse orally administered the insulin-inducible polypeptide NK20-326 of the present invention was significantly (t test: p ⁇ 0.05) compared with the control. Reduced blood sugar. STZ oral administration (NK20-326)
- Oral or subcutaneous administration of human insulin 400 ng / animal
- lmg / kg of nattokinase purified product of about 65% purity
- the blood glucose level of STZ mice was changed under the same conditions as described in (3) above, except that kg orally or subcutaneously, and 0.2 ml of the recombinant protein synthesis kit medium (8/8 sample) were orally or subcutaneously administered. It was measured.
- NK20-69, NK20-119, NK20-219, NK40-219 was prepared, and insulin-inducible NK polypeptide was prepared in the same manner as in Example 1 (2). .
- STZ streptozodocin 195 mg / kg was intraperitoneally administered to 6-week-old C57BL / 5 male mice (SLC) to produce type 1 diabetes (insulin deficient) model mice.
- Blood glucose was collected from the orbital venous plexus of mice using a capillarium and measured by Daltest Ace (GT-1640: manufactured by Sanwa Chemical Laboratory).
- each of the NK polypeptides was orally administered to STZ mice.
- the polypeptide was suspended in PBS (Phosphate Buffer Saline) to prepare 100 mg / ml, and 0.2 ml / animal was administered.
- PBS + BSA was administered in the same amount as the NK polypeptide. Thereafter, blood glucose was measured every 30 minutes for up to 4 hours.
- NK20-69 shown in Fig. 6 Did not show a significant blood sugar lowering effect as compared to On the other hand, NK20-119 (FIG. 7) and NK20-210 (FIG. 8) each showed a significant (p ⁇ 0.05) blood glucose lowering effect as compared with the control.
- NK40-219 which lacked the 39 amino acids at the N-terminal of NK, did not show a significant blood glucose lowering effect in either 1/1 (Fig. 9) or 1/10 (Fig. 10).
- the NK polypeptide consisting of an amino acid sequence of 50 amino acids or more from the 20th amino acid at the N-terminal to the C-terminal has insulin-inducibility (blood glucose lowering effect).
- NK40-219 did not show a blood glucose lowering effect, it was confirmed that the N-terminal 20-39 amino acid region was an essential active region.
- Insulin-inducible NK polypeptide NK20-219 was produced in the same manner as in Example 1 (2).
- mice Six-week-old C57BL db / db male mice (Clear Japan: type I diabetes model mouse) were divided into groups so that the average blood glucose level after a 3-hour fast was about 400 mg / dl. After fasting for 18 hours, the fasting blood glucose level was measured, and a 2 g / kg glucose load (oral administration of sugar water by gastric sonde) was performed. Blood glucose was measured from the orbital venous plexus of mice using a capillarium and measured by Daltest Ace (GT-1640: manufactured by Sanwa Chemical Laboratory). After confirming that the blood glucose level increased 30 minutes after the glucose load, NK polypeptide NK20-219 was orally administered to db / db mice.
- GT-1640 Daltest Ace
- the polypeptide was suspended in PBS (Phosphate Buffer Saline) to prepare 100 mg / ml, and 0.2 ml / animal was administered. As a control, PBS was administered in the same amount as the NK polypeptide. Thereafter, blood glucose levels were measured until 1, 2, and 4 hours later.
- PBS Phosphate Buffer Saline
- the insulin-inducing polypeptide of the present invention has an effective therapeutic effect also on type II diabetes.
- insulin can be effectively induced to lower blood glucose level, and can be administered orally, for prevention, improvement and treatment of diabetes and the like. Effective agents and compositions are provided.
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Abstract
Description
Claims
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JP2005516263A JPWO2005056784A1 (ja) | 2003-12-15 | 2004-12-15 | インスリン誘導性ポリペプチド |
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JP2003-416872 | 2003-12-15 | ||
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WO2005056784A1 true WO2005056784A1 (ja) | 2005-06-23 |
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JP (1) | JPWO2005056784A1 (ja) |
WO (1) | WO2005056784A1 (ja) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006025276A1 (ja) * | 2004-08-31 | 2006-03-09 | Kumamoto University | ナットウキナーゼを含む眼科疾患の治療・予防剤 |
WO2008019417A3 (en) * | 2006-08-16 | 2008-05-29 | Marlyn Nutraceuticals Inc | Treatment of ocular diseases |
CN102488071A (zh) * | 2011-12-01 | 2012-06-13 | 河北联合大学 | 纳豆激酶冰激凌及其制作方法 |
CN108192910A (zh) * | 2017-09-19 | 2018-06-22 | 陈玉皎 | 培育降血糖和降血栓的转基因植物 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002360220A (ja) * | 2001-06-13 | 2002-12-17 | Health Way:Kk | 血行障害の改善作用を有する健康補助食品 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4309108B2 (ja) * | 2002-09-26 | 2009-08-05 | 大和薬品株式会社 | 糖尿病治療薬 |
JP4271075B2 (ja) * | 2003-04-30 | 2009-06-03 | 独立行政法人科学技術振興機構 | 消化器官吸収性ポリペプチド |
-
2004
- 2004-12-15 WO PCT/JP2004/019153 patent/WO2005056784A1/ja active Application Filing
- 2004-12-15 JP JP2005516263A patent/JPWO2005056784A1/ja active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002360220A (ja) * | 2001-06-13 | 2002-12-17 | Health Way:Kk | 血行障害の改善作用を有する健康補助食品 |
Non-Patent Citations (2)
Title |
---|
DATABASE GENBANK [online] "Bacillus subtilis var. natto serkinase-nattokinase gene, complete cds", XP002985931, accession no. AF368283 * |
HUTTON J. C. ET AL: "Insulin secretory granule biogenesis and the proinsulin-processing endopeptidases", DIABETOLOGIA, vol. 37, no. 2, 1994, pages S48 - S56, XP002985930 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006025276A1 (ja) * | 2004-08-31 | 2006-03-09 | Kumamoto University | ナットウキナーゼを含む眼科疾患の治療・予防剤 |
WO2008019417A3 (en) * | 2006-08-16 | 2008-05-29 | Marlyn Nutraceuticals Inc | Treatment of ocular diseases |
CN102488071A (zh) * | 2011-12-01 | 2012-06-13 | 河北联合大学 | 纳豆激酶冰激凌及其制作方法 |
CN108192910A (zh) * | 2017-09-19 | 2018-06-22 | 陈玉皎 | 培育降血糖和降血栓的转基因植物 |
Also Published As
Publication number | Publication date |
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JPWO2005056784A1 (ja) | 2007-07-05 |
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