WO2013063755A1 - 一种治疗肝纤维化和/或治疗乙肝和/或改善肝功能的寡肽 - Google Patents

一种治疗肝纤维化和/或治疗乙肝和/或改善肝功能的寡肽 Download PDF

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WO2013063755A1
WO2013063755A1 PCT/CN2011/081620 CN2011081620W WO2013063755A1 WO 2013063755 A1 WO2013063755 A1 WO 2013063755A1 CN 2011081620 W CN2011081620 W CN 2011081620W WO 2013063755 A1 WO2013063755 A1 WO 2013063755A1
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oligopeptide
seq
amino acid
hepatitis
liver
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PCT/CN2011/081620
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English (en)
French (fr)
Inventor
雷海民
李强
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Lei Haimin
Li Qiang
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Priority to US14/346,087 priority Critical patent/US8957019B2/en
Priority to PCT/CN2011/081620 priority patent/WO2013063755A1/zh
Publication of WO2013063755A1 publication Critical patent/WO2013063755A1/zh

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    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07KPEPTIDES
    • C07K7/00Peptides having 5 to 20 amino acids in a fully defined sequence; Derivatives thereof
    • C07K7/04Linear peptides containing only normal peptide links
    • C07K7/06Linear peptides containing only normal peptide links having 5 to 11 amino acids
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P1/00Drugs for disorders of the alimentary tract or the digestive system
    • A61P1/16Drugs for disorders of the alimentary tract or the digestive system for liver or gallbladder disorders, e.g. hepatoprotective agents, cholagogues, litholytics
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P31/00Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics
    • A61P31/12Antivirals
    • A61P31/20Antivirals for DNA viruses
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K38/00Medicinal preparations containing peptides

Definitions

  • the present invention relates to oligopeptides, and in particular to the isolation and isolation of oligopeptides having anti-hepatitis B, anti-hepatic fibrosis and anti-tumor from Chinese herbal medicine. Background technique
  • Triony c Sinensis Wiegmann It is derived from the back of the genus Triony c Sinensis Wiegmann. It is mainly produced in Hubei, Hunan and other places. It has the functions of softening and firming, nourishing yin and clearing heat, and stagnation of the sun. Modern pharmacological studies have shown that it has anti-mutation effects, anti-fatigue and immune regulation effects, and liver protection.
  • the object of the present invention is to provide an oligopeptide which is resistant to hepatitis B virus and treats liver fibrosis; and an object of the present invention is to provide a method for preparing an oligopeptide against hepatitis B virus and treating liver fibrosis;
  • the invention adopts the method of separating and identifying the oligopeptides by using various chemical analysis separation and identification techniques and methods, and using the liquid phase peptide synthesis technology to the monomer oligopeptides.
  • the components were fully synthesized, and the activity of the monomeric oligopeptides was determined by using duck hepatitis B model, mouse CCL4 acute liver injury model, rat CCL4 liver fibrosis model and S180 solid tumor-bearing chicken mouse model.
  • the present invention provides an anti-hepatitis B virus, a therapeutic or prophylactic liver fibrosis oligopeptide, wherein SEQ.ID.N0.1 is: Gly-Ala-Gly-Pro-His-Gly-Gly.
  • the SEQ.ID.NO.1 oligopeptide is a white amorphous powder, which is positive for biuret reaction, soluble in water, insoluble in non-polar solvents such as ethyl acetate, acetone, chloroform, and the amino acid sequence thereof is ESI- MS analysis ESI-MS (M/e): 551 (GAGPHGG), 494 (AGPHGG), 423 (GPHGG), 366 (PHGG), 269 (HGG), 132 (GG), 75 (G) and 478 (GAGPHG) , 421 (GAGPH), 284 (GAGP), 187 (GAG), 130 (GA), 59 (G+H-OH)
  • ESI-MS MS analysis ESI-MS (M/e): 551 (GAGPHGG), 494 (AGPHGG), 423 (GPHGG), 366 (PHGG), 269 (HGG), 132 (GG), 75 (G) and 478 (GAGPHG) , 421 (GAGPH),
  • the SEQ.ID.NO.l oligopeptide is an L-form amino acid or a D-form amino acid.
  • the present invention provides a method for producing the SEQ.ID.NO.1 oligopeptide, which comprises: isolating the SEQ.ID.NO.1 oligopeptide from sputum.
  • the method for preparing the SEQ.ID.NO.1 oligopeptide comprising the steps of:
  • Step 1 ⁇ coarse powder, add water, reflux extraction, concentration, concentrate
  • Step 2 The concentrated liquid of step 1 is alcohol-deposited to obtain an alcohol precipitation portion
  • Step 3 The alcohol precipitation fraction of step 2 is separated, detected, and SEQ.ID.NO.l oligopeptide is collected.
  • SEQ. ID. NO. 1 oligopeptide preparation method wherein in step 2, preferably 2-4 times alcohol precipitation, the concentration of ethanol per ethanol is from low to high.
  • the separation in the step 3 is carried out by first performing cation exchange resin separation, followed by gel column chromatography; the detection of the step 3 can be carried out by high performance liquid chromatography (HPLC) method and mass spectrometry (ESI-MS) confirmation.
  • HPLC high performance liquid chromatography
  • ESI-MS mass spectrometry
  • step 2 is: the reflux extract of the step 1 is added with ethanol to an alcohol concentration of 20%, centrifuged, and the supernatant is further added with ethanol to an alcohol concentration of 60%, centrifuged. , The supernatant is continuously added with ethanol to an alcohol concentration of 80%;
  • step 3 is preferably: partially dissolving the ethanol precipitate, first performing cation exchange resin separation, followed by Sephadex LH-20 gel column chromatography, HPLC detection, collecting SEQ .ID.NO.1 oligopeptide.
  • the present invention still further provides a process for producing the SEQ.ID.NO.1 oligopeptide which is obtained by a liquid phase synthesis method.
  • the present invention still further provides a process for producing the SEQ.ID.NO.1 oligopeptide which is obtained by a solid phase synthesis method.
  • the amino acid sequence of the two oligopeptides was obtained by electrospray ionization mass spectrometry (ESI-MS) and an amino acid automatic analyzer.
  • the present invention provides a pharmaceutical composition of any of the SEQ.ID.N0.1 oligopeptides in a convenient administration form, which comprises an oral or parenteral administration form. They are particularly suitable for preparation in the form of injection administration.
  • SEQ.ID.N0.1 oligopeptide may be added to a pharmaceutically acceptable excipient, and prepared into various dosage forms, including injections, tablets (matrix tablets, coated tablets, dispersible tablets, etc.), capsules, sustained release agents, Controlled release agents, monthly plastids and other dosage forms.
  • Solvents include water for injection, glycerin, polyethylene glycol, fillers including: starch, pre- Gelatinized starch, lactose, mannitol, chitin, microcrystalline cellulose, sucrose, etc.; disintegrators include: starch, pregelatinized starch, microcrystalline cellulose, sodium carboxymethyl starch, crosslinked polyvinylpyrrolidone, Low-substituted hydroxypropyl cellulose, croscarmellose sodium, etc.; lubricants include: magnesium stearate, sodium lauryl sulfate, talc, silica, etc.; suspending agents include: polyvinylpyrrolidone, Microcrystalline cellulose, sucrose, agar, hydroxypropyl fluorenyl cellulose, etc.; binders include: starch syrup, polyvinylpyrrolidone, hydroxypropyl fluorenyl cellulose, etc.; sweeteners include: sodium saccharin, Aspa Tantan, suc
  • the invention further provides a method of anti-hepatitis B virus or anti-fibrosis, which comprises administering SEQ. ID. NO. 1 in a pharmaceutically acceptable form as needed daily.
  • the invention further provides the use of SEQ. ID. NO. 1 for the preparation of a medicament for the treatment of liver fibrosis and/or for improving liver function.
  • the invention further provides the use of SEQ. ID. NO. 1 for the preparation of a medicament for the treatment of anti-hepatitis B virus.
  • the invention further provides the use of SEQ. ID. NO. 1 for the preparation of an anti-tumor drug.
  • Scenario 2 :
  • the present invention provides an anti-hepatitis B virus, anti-hepatic fibrosis oligopeptide, wherein SEQ.ID.N0.2 is: Gly-Ala-Gly-Pro-His-Gly.
  • the SEQ. ID. N0.2 is a white amorphous powder.
  • Biuret is positive, soluble in water, insoluble in non-polar solvents such as ethyl acetate, acetone, and chloroform. Its amino acid sequence was analyzed by ESI-MS, ESI-MS (M/e): 494 (GAGPHG), 423 (AGPHG), 366 (GPHG), 269 (PHG), 132 (HG), 75 (G) and 421 ( GAGPH), 284 (GAGP), 187 (GAG), 130 (GA), 59 (G+H-OH) data were confirmed.
  • the SEQ.ID.N0.2 oligopeptide is an L-form amino acid or a D-form amino acid.
  • the present invention provides a method for producing the SEQ.ID.N0.2 oligopeptide, which comprises: isolating the SEQ.ID.N0.2 oligopeptide from sputum.
  • a method for preparing the SEQ.ID.N0.2 oligopeptide comprising the steps of:
  • Step 1 ⁇ coarse powder, add water, reflux extraction, concentration, concentrate
  • Step 2 The concentrated liquid of step 1 is subjected to alcohol precipitation by adding alcohol to obtain an alcohol precipitation portion;
  • Step 3 The alcohol precipitation fraction of step 1 is separated, detected, and the SEQ.ID.N0.2 oligopeptide is collected.
  • the separation in the step 3 is carried out by first performing cation exchange resin separation, followed by gel column chromatography; the detection of the step 3 can be carried out by high performance liquid chromatography (HPLC), and mass spectrometry (ESI-MS) confirms.
  • HPLC high performance liquid chromatography
  • ESI-MS mass spectrometry
  • step 2 is: the reflux extract of the step 1 is added with ethanol to an alcohol concentration of 20%, centrifuged, and the supernatant is further added with ethanol to an alcohol concentration of 60%, and centrifuged. , the supernatant continues to add ethanol to an alcohol concentration of 80%;
  • step 3 is preferably: partially dissolving the ethanol precipitate, first performing cation exchange resin separation, followed by Sephadex LH-20 gel column chromatography, HPLC detection, collecting SEQ .ID.N0.2 oligopeptide.
  • the amino acid sequence of the two oligopeptides was obtained by electrospray ionization mass spectrometry (ESI-MS) and an amino acid automatic analyzer.
  • the present invention still further provides a process for producing the SEQ.ID.N0.2 oligopeptide, which is obtained by a liquid phase synthesis method.
  • the present invention still further provides a method for preparing SEQ.ID.N0.2 oligopeptide, which is synthesized by solid phase The method is obtained.
  • the present invention provides a pharmaceutical composition of any of the SEQ.ID.N0.2 oligopeptides in a convenient administration form, which comprises an oral or parenteral administration form. They are particularly suitable for the preparation for administration by injection.
  • SEQ.ID.N0.2 oligopeptide is added to a pharmaceutically acceptable excipient, and is prepared into various dosage forms, including injections, tablets (matrix tablets, coated tablets, dispersible tablets, etc.), capsules, microemulsions, and buffers. Release agents, controlled release agents, liposomes and other dosage forms, granules, suppositories, liquid preparations such as oral.
  • Solvents include water for injection, glycerin, polyethylene glycol; fillers include: starch, pregelatinized starch, lactose, mannitol, quercetin, microcrystalline cellulose, sucrose, etc.; disintegrators include: starch, pregelatinization Starch, microcrystalline cellulose, sodium carboxymethyl starch, crosslinked polyvinylpyrrolidone, low substituted hydroxypropyl cellulose, croscarmellose sodium, etc.; lubricants include: magnesium stearate, lauryl sulfate Sodium, talc, silica, etc.; suspending agents include: polyvinylpyrrolidone, microcrystalline cellulose, sucrose, agar, hydroxypropyl fluorenyl cellulose, etc.; binders include, starch syrup, polyvinylpyrrolidone, hydroxy Propyl fluorenyl cellulose, etc.; sweeteners include: sodium saccharin, aspartame, sucrose, cycla
  • the invention further provides a method of anti-hepatitis B virus or anti-fibrosis, which comprises administering SEQ. ID. N0.2 in a pharmaceutically acceptable form as needed daily. The application of the drug.
  • the invention further provides the use of SEQ. ID. N0.2 for the preparation of a medicament for the treatment of anti-hepatitis B virus.
  • the invention further provides the use of SEQ. ID. N0.2 for the preparation of an anti-tumor drug.
  • SEQ. ID. N0.2 for the preparation of an anti-tumor drug.
  • Figure 1 Liquid phase diagram of oligopeptide compound 1
  • Figure 2 Liquid phase diagram of oligopeptide compound 2
  • Figure 3-11 Amino acid sequence diagram obtained by the oligopeptide compound 1 amino acid analyzer, Figure 3: blank pair
  • Figure 4 N-terminal glycine analysis chart
  • Figure 5 N-terminal alanine analysis chart
  • Figure 6 N-terminal glycine analysis chart
  • Figure 7 N-terminal proline analysis chart
  • Figure 8 N-terminal histidine analysis chart
  • Figure 9 N-terminal glycine analysis chart
  • Figure 10 N-terminal glycine analysis chart
  • Figure 11 Standard amino acid map
  • Figure 12-19 Amino acid sequence diagram of the oligopeptide compound 2 amino acid analyzer, Figure 12: blank control chart, Figure 13: N-terminal glycine analysis chart, Figure 14: N-terminal alanine analysis chart, attached Figure 15: N-terminal glycine analysis chart, Figure 16: N-terminal proline analysis chart, Figure 17: N-terminal histidine analysis chart, Figure 18: N-terminal glycine analysis chart, Figure 19: Standard amino acid sequence Figure. detailed description
  • aqueous extract solution was positively reacted with biuret, indicating that there is indeed a peptide compound in the sputum.
  • Compound 1 (home-made), determined by HPLC normalization purity greater than 98%;
  • Compound 2 (self-made), determined by HPLC normalization purity greater than 98%;
  • Agilent 1100 LC-MSD series trap Double High Pressure Solvent Pump, Online Vacuum Degasser, Autosampler, Column Compartment, DAD Detector, ESI Ion Trap Detector, Agilent, USA); Amino Acid Auto Analyzer ( ABI PROCISETM 492cLC );
  • Trifluoroacetic acid (TFA, Sigma, USA), acetonitrile (chromatographically pure, fisher), hydrochloric acid (analytical purity)
  • Compound 1 One of the white amorphous powders prepared in Example 1 was taken. It is positive for the biuret reaction, soluble in water, and insoluble in non-polar solvents such as ethyl acetate, acetone and chloroform.
  • ESI-MS 574 ( M+Na ), 552 ( ⁇ + ⁇
  • Determination of the amino acid species After the hydrolysis of concentrated HC1, the thin layer of silica gel was detected (thin conditions: silica gel G plate, n-butanol-glacial acetic acid-ethanol-water) (4:1:1:2) as a developing agent, unroll, remove, dry, spray with 0.5% ninhydrin acetone solution, heat at 105 °C until the spots are clear, and pass with standard amino acids (glycine (G) , alanine (A), proline (P), histidine (H) total thin layer control, determine the compound
  • the species of the amino acid of the substance 1 is glycine (G), alanine (A), proline (P), and histidine (H).
  • the amino acid sequence analysis was carried out by using an amino acid sequence automatic analyzer (Fig. 3-11), and the sequencing result was: GAGPHGG, and the amino acid sequence was further subjecte
  • Compound 2 White amorphous powder. Biuret is positive, soluble in water, insoluble in non-polar solvents such as ethyl acetate, acetone, chloroform. ESI-MS: 517 (M+Na), 495 ( ⁇ + ⁇ ).
  • ESI-MS analysis of the compound 2 amino acid sequence ⁇ 'j was ESI-MS (M/e): 494 (GAGPHG), 423 (AGPHG), 366 (GPHG), 269 (PHG), 132 (HG), 75 ( G) and 421 (GAGPH), 284 (GAGP), 187 (GAG), 130 (GA), 59
  • Mass spectrometry conditions were: Mass Rang Mode: Ultra Scan, Ion Polarity: positive, Ion Source Type: ESI, Dry Temp: 350, Nebulizer: 50.00 psi, Dry Gas: 10.001/min.
  • Agilent 1100 LC-MSD series trap double high pressure solvent pump, online vacuum degasser, autosampler, column oven, DAD detector, ESI ion trap speech detector, Agilent, USA; Amino acid automatic analyzer ( ABI PROCISETM 492cLC );
  • WANG resin Tin Nankai Hecheng Technology Co., Ltd.
  • Sephadex LH-20 protected amino acids are imported and packaged, and the chemical reagents are of analytical grade.
  • the precipitate was collected by centrifugation, and washed with an appropriate amount of anhydrous diethyl ether.
  • the precipitate was dissolved in water, desalted by Sephadex LH-20 gel column, followed by preparative HPLC, and the single color peak fractions were collected, combined, and lyophilized, yield 15.5%.
  • reaction for 10h stop the reaction, filter
  • the reaction solution was removed, and the resin was reacted twice with DMF lotion, and DMF was filtered off; after deprotection with 20% PIP/DMF reagent for 15-20 min, the resin was washed with DCM multiple times; reagent 1 was added (preparation method 0.4 mol Fmoc-H) -OH and 0.4mol HOBT dissolved in DCM, then added O.lmol DIC, stirred for 10min), 0.004mol DMAP, reaction for 10h, the reaction was stopped, the reaction solution was filtered off, the resin was reacted twice with DMF lotion, and DMF was filtered off;
  • Heptapeptide GAGPHGG self-made assay greater than 98%
  • positive drug lamivudine Gaxo Wellcome Pharmaceuticals
  • DHBV-DNA duck hepatitis B virus DNA
  • a-32p-dCTP Beijing Furui Biotechnology Engineering Company
  • gap translation Pillbox Promega
  • Sephadex G-50, Ficoll P VP Sephadex G-50, Ficoll P VP (Swedish Pharmacia; SDS (Merck); fish sperm DNA, bovine serum albumin (Institute of Biophysics, Chinese Academy of Sciences).
  • DHBV infection 1 year old Beijing duck, spleen iv DHBV-DNA strong positive duck serum, blood was taken 7 days after infection, serum was separated, stored at -70 V.
  • DHBV infected ducks were randomly divided into groups.
  • the heptapeptide administration group was 0.5mg/Kg, lmg/Kg subcutaneously, once every 2 days, administered for 10 days, virus control group, replacing saline with normal saline; positive drug (Lamifudine) group, po drug 50mg/kg, 2 times a day for 10 days.
  • positive drug (Lamifudine) group po drug 50mg/kg, 2 times a day for 10 days.
  • blood was taken from the duck leg iliac vein, and the serum was separated and stored at -70 ° C for examination.
  • Detection method Take the above-mentioned duck serum to be tested, and simultaneously film each batch to determine the dynamic level of DHBV-DNA in duck serum.
  • the DHBV-DNA probe was labeled with 32p, the duck serum spot hybridization, the autoradiography patch spot was measured, the absorbance value was measured (490 nm), and the serum DHBV-DNA density was calculated to hybridize spot A. The value is taken as the DHBV-DNA level value of the specimen.
  • DHBV-DNA inhibition rate (A value before administration - A value after administration) / Before administration A value x l00%
  • Heptapeptide GAGPHGG (1mg/kg) has a certain inhibitory effect on duck hepatitis B virus.
  • Oligopeptide GAGPHGG protects against acute liver injury in mice
  • Heptapeptide GAGPHGG domestic determination greater than 98%
  • positive drug biphenyl diester dropping pills Beijing Union Pharmaceutical Factory:
  • ALT Alanine aminotransferase
  • AST aspartate aminotransferase
  • GSH-Px glutathione peroxidase
  • MDA malondialdehyde
  • mice After the blood was taken, the mice were sacrificed, dissected, the liver was removed, homogenized, and used. Serum ALT, AST activity and GSH-Px activity and MDA content in liver tissues of each group were determined according to the kit instructions. All data were expressed as mean ⁇ standard deviation (x ⁇ SD). Hypothesis testing of differences between samples in each group Analysis of variance was used.
  • Biphenyl diester group 12 100 296.82 5.29 1.25**
  • Heptapeptide can significantly inhibit the serum ALT and AST activity of mice with acute liver injury induced by carbon tetrachloride, and has protective effect on acute liver injury induced by carbon tetrachloride.
  • Heptapeptide GAGPHGG domestic determination greater than 98%
  • positive drug biphenyl diester dropping pills Beijing Union Pharmaceutical Factory:
  • ALT alanine aminotransferase
  • AST aspartate aminotransferase
  • GSH-Px glutathione peroxidase
  • MDA malondialdehyde
  • TGF-P mRNA in situ hybridization The kit and the rat ⁇ -ELISA kit were purchased from Nanjing Jiancheng Bioengineering Research Institute, and other reagents were domestically analyzed.
  • mice 48 rats were randomly divided into control group, model group, high dose of heptapeptide and small dose of heptapeptide, 12 in each group.
  • CC14 was formulated into 40% solution with olive oil, subcutaneously injected into the animal at 5 ml/kg twice a week for 8 weeks; GAGPHGG intervention group was given subcutaneous injection of heptapeptide while modeling (concentration 0.12 mg / kg, 0.06) Mg / kg, once every 2 days for 8 weeks).
  • Animals in each group were sacrificed 48 h after the last CC14 injection, and serum and liver tissue samples were taken for examination. Serum was tested for ALT, AST and TGFpi levels according to the reagent instructions. Liver tissue samples were fixed in neutral formalin solution and embedded in paraffin. 5ttm tissue sections were prepared with polylysine coated slides for HE staining and Masson triple collagen staining for histopathological examination.
  • Heptapeptide GAGPHGG has certain anti-fibrosis effect, and its anti-liver fibrosis mechanism needs to be further improved.
  • Example 7 The heptapeptide GAGPHGGlOg was taken, and an injection preparation (including a lyophilized powder injection and a sterile dry powder injection) was added as an appropriate preparation, and an injection was prepared according to an injection (including a lyophilized powder injection and a sterile dry powder injection).
  • Example 8 Take the heptapeptide GAGPHGGlOg, add appropriate excipients to tablets (including controlled release tablets, matrix tablets, coated tablets, dispersible tablets, etc.), according to tablets (including controlled release tablets, matrix tablets, coated tablets, dispersion) Tablets, etc.) The process is prepared into sublingual tablets and tablets.
  • Example 9 The heptapeptide GAGPHGGlOg was added, and the appropriate adjuvant was added to the capsule, and the enteric gelatin capsule and the capsule were prepared according to the glue preparation process.
  • Example 10 The heptapeptide GAGPHGG 10g was added, and an appropriate adjuvant was added to the emulsion (including microemulsion, nanoemulsion, etc.) to prepare a microemulsion according to the emulsion (including microemulsion, nanoemulsion, etc.).
  • Example 11 Heptapeptide GAGPHGGlOg was added, and a suitable sustained-release controlled release agent was added to prepare various sustained-release and controlled-release agents according to the sustained release controlled release agent process.
  • Example 12 Heptapeptide GAGPHGGlOg was added, and appropriate excipients of the liposome dosage form were added, and various liposome dosage forms were prepared according to the liposome process.

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Abstract

本发明公开一种治疗肝纤维化和/或治疗乙肝和/或改善肝功能的寡肽,由鳖甲经水回流提取、醇沉、过阳离子交换树脂柱和凝胶树脂柱分离得到,本发明制备的寡肽可加入药学上常规的辅料,制备成各种剂型。该寡肽在治疗肝纤维化和改善肝功能方面具有很好的疗效。

Description

一种治疗肝纤维化和 /或治疗乙肝和 /或改善肝功能的寡肽 技术领域
本发明涉及寡肽, 具体地说是从中药鳖曱中提取分离具有抗乙肝、 抗肝 纤维化和抗肿瘤的寡肽。 背景技术
鳖曱来源于鳖科动物鳖 Triony c Sinensis Wiegmann的背曱。 主产于 湖北、 湖南等地, 具有软坚散结, 养阴清热, 潜阳熄风的功效。 现代药理 研究表明, 其具有抗突变作用、 抗疲劳及免疫调节作用和保肝作用等。
现有文献中普遍认为氨基酸为鳖曱的主要成分(龟板、 鳖曱炮制前后 化学成分的变化.中国药学杂志, 1989,24(1):26 ~ 28 ), 没有明确指出鳖曱的 活性成分为寡肽类。 经过试验研究, 我们确定了鳖曱中主要含有寡肽类成 分。
现有国内外文献和技术中, 除了发明人, 没有对鳖曱的寡肽类成分进 行提取、 分离和鉴定。
现有国内外文献和技术中,也没有对序列号为 GAGPHGG和 GAGPHG 的寡肽进行合成, 只是报道了大量的肽类合成方法。
现有国内外文献和技术中,也没有对序列号为 GAGPHGG和 GAGPHG 的寡肽进行任何形式的活性报道。 发明内容
本发明的目的在于提供一种抗乙肝病毒、 治疗肝纤维化的寡肽; 本发明的目的还在于提供一种抗乙肝病毒、 治疗肝纤维化的寡肽的制 备方法;
本发明的目的还在于提供一种寡肽在治疗乙肝、 肝损伤及肝纤维化疾 病的方法;
本发明的目的还在于提供一种寡肽在在制备治疗乙肝、 肝损伤及肝纤 维化疾病药物中的应用。 本发明是以软坚散结中药鳖曱为研究对象, 利用各种化学分析分离鉴 定技术和方法, 对鳖曱寡肽类成分进行系统地分离和鉴定, 利用液相肽合 成技术对单体寡肽类成分进行全合成, 利用鸭乙肝模型、 小鼠 CCL4急性 肝损伤模型、 大鼠 CCL4肝纤维化模型和 S180实体荷瘤鸡小鼠模型, 对单 体寡肽类成分进行活性测定, 以寻找抗乙肝病毒、 抗肝纤维化、 抗肿瘤的 寡肽类先导化合物。
为实现上述发明目的, 可以选择如下方案 1或方案 2。
方案 1:
本发明提供一种抗乙肝病毒、 治疗或预防肝纤维化寡肽, 其 SEQ.ID.N0.1 为: Gly-Ala-Gly-Pro-His-Gly-Gly。
所述 SEQ.ID.NO.1 寡肽为白色无定形粉末, 双缩脲反应呈阳性, 易溶于 水, 不溶于乙酸乙酯、 丙酮、 氯仿等非极性溶剂, 其氨基酸序列经 ESI-MS分 析 ESI-MS(M/e): 551(GAGPHGG),494(AGPHGG),423(GPHGG), 366(PHGG), 269(HGG), 132(GG),75(G)和 478(GAGPHG)、 421(GAGPH)、 284(GAGP)、 187(GAG)、 130(GA)、 59 ( G+H-OH )„
所述 SEQ.ID.NO.l寡肽为 L型氨基酸或 D型氨基酸。
本发明提供一种 SEQ.ID.NO.l 寡肽的制备方法, 该方法为: 由鳖曱中分 离 SEQ.ID.NO.l寡肽。
所述 SEQ.ID.NO.l寡肽的制备方法, 该方法包括如下步骤:
步骤 1 : 鳖曱粗粉, 加水, 回流提取, 浓缩, 浓缩液;
步骤 2: 步骤 1的浓缩液加醇进行醇沉, 得到醇沉部分;
步骤 3: 步骤 2的醇沉部分进行分离, 检测, 收集 SEQ.ID.NO.l寡肽。 上述 SEQ.ID.NO.l寡肽的制备方法, 其中步骤 2中优选 2-4次醇沉,每次 醇沉乙醇的浓度由低至高。
所述步骤 3的分离为先进行阳离子交换树脂分离, 后进行凝胶柱层析; 所述步骤 3的检测可以采用高效液相 (HPLC )方法检测,质谱(ESI-MS ) 确证。
上述 SEQ.ID.NO.l寡肽的制备方法, 其中步骤 2为: 步骤 1的回流提取液 加乙醇至醇浓度为 20%, 离心, 上清液继续加乙醇至醇浓度为 60%, 离心, 上清液继续加乙醇至醇浓度为 80%;
上述 SEQ.ID.N0.1寡肽的制备方法, 其中步骤 3优选为: 将乙醇沉淀部 分溶解, 先进行阳离子交换树脂分离, 后进行 Sephadex LH-20凝胶柱层析, HPLC检测, 收集 SEQ.ID.NO.1寡肽。
上述 SEQ.ID.N0.1寡肽的制备方法,其中步骤 3:取 80%醇沉部分,水溶, 上阳离子交换树脂, PH=4-5 的緩沖液洗脱, 收集双缩尿试剂反应阳性部分, 合并,冷冻干燥,水溶,上 Sephadex LH-20凝胶柱层析,纯水洗脱,收集 HPLC 检测单一色语峰流分, 合并, 冷冻干燥, 收集 SEQ.ID.NO.1寡肽。
上述 SEQ.ID.N0.1寡肽的制备方法, 其中步骤 1 中鳖曱粗粉(醋制 )加 6- 10倍量水,回流提取 1 -3次,每次 1 -2小时,提取液浓缩至相对密度为 1.1 - 1.13。
本发明还进一步提供 SEQ.ID.NO.1 寡肽的制备方法, 该方法用液相合成 方法得到。
本发明还进一步提供 SEQ.ID.NO.1 寡肽的制备方法, 该方法用固相合成 方法得到。
所述寡肽序列的鉴定步骤如下:
1、 利用双缩脲反应进行化学鉴定, 后分别对水, 乙酸乙酯、 丙酮、 氯仿等 溶剂的溶解性进行鉴定;
2、 测定所述的寡肽的分子量, ESI-MS:574 ( M+Na ), 552 ( M+H );
3、 进行硅胶薄层鉴定初步确定氨基酸的种类;
4、 利用电喷雾质谱( ESI-MS )及氨基酸自动分析仪进行分析得到两种寡肽 的氛基酸序列。
本发明提供任何可方便给药形式的 SEQ.ID.N0.1 寡肽的药用组合物, 包 括经口或胃肠外给药形式。 它们特别适合制备为注射给药形式。
上述 SEQ.ID.N0.1寡肽可加入药学上常规的辅料, 制备成各种剂型, 包括 注射剂、 片剂 (骨架片、 包衣片、 分散片等)、 胶嚢剂、 緩释剂、 控释剂、 月旨 质体等剂型、。
为使上述剂型能够实现, 需在制备这些剂型时加入药学可接受的辅料, 例 如: 溶剂、 填充剂、 崩解剂、 润滑剂、 助悬剂、 粘合剂、 甜味剂、 矫味剂、 防 腐剂、 基质等。 溶剂包括注射用水、 甘油、 聚乙二醇, 填充剂包括: 淀粉、 预 胶化淀粉、 乳糖、 甘露醇、 曱壳素、 微晶纤维素、蔗糖等; 崩解剂包括: 淀粉、 预胶化淀粉、 微晶纤维素、 羧曱基淀粉钠、 交联聚乙烯吡咯烷酮、 低取代羟丙 纤维素、 交联羧曱基纤维素钠等; 润滑剂包括: 硬脂酸镁、 十二烷基硫酸钠、 滑石粉、 二氧化硅等; 助悬剂包括: 聚乙烯吡咯烷酮、 微晶纤维素、 蔗糖、 琼 脂、 羟丙基曱基纤维素等; 粘合剂包括, 淀粉浆、 聚乙烯吡咯烷酮、 羟丙基曱 基纤维素等; 甜味剂包括: 糖精钠、 阿斯帕坦、 蔗糖、 甜蜜素、 甘草次酸等; 矫味剂包括: 甜味剂及各种香精; 防腐剂包括: 尼泊金类、苯曱酸、苯曱酸钠、 山梨酸及其盐类、 苯扎溴铵、 醋酸氯乙定、 桉叶油等; 基质包括: PEG6000, PEG4000, 虫蜡等。
本发明进一步提供抗乙肝病毒或抗肝纤维化的方法,该方法包括每日给予 需要的药学上可接受形式的 SEQ.ID.NO.1。
本发明进一步提供 SEQ.ID.NO.1在制备用于治疗肝纤维化和 /或改善肝功 能的药物中的应用。
本发明进一步提供 SEQ.ID.NO.1在制备抗乙肝病毒药物中的应用。
本发明进一步提供 SEQ.ID.NO.1在制备抗抗肿瘤药物中的应用。 方案 2:
本发明提供一种抗乙肝病毒、 抗肝纤维化寡肽, 其 SEQ.ID.N0.2 为: Gly-Ala-Gly-Pro-His-Gly。
所述 SEQ.ID.N0.2为白色无定形粉末。 双缩脲反应阳性, 易溶于水, 不 溶于乙酸乙酯、 丙酮、 氯仿等非极性溶剂。 其氨基酸序列经 ESI-MS 分析, ESI-MS(M/e):494(GAGPHG),423(AGPHG), 366(GPHG), 269(PHG), 132(HG), 75(G)和 421(GAGPH)、 284(GAGP)、 187(GAG)、 130(GA)、 59 ( G+H-OH )数 据所确证。
所述 SEQ.ID.N0.2寡肽为 L型氨基酸或 D型氨基酸。
本发明提供一种 SEQ.ID.N0.2 寡肽的制备方法, 该方法为: 由鳖曱中分 离 SEQ.ID.N0.2寡肽。
所述 SEQ.ID.N0.2寡肽的制备方法, 该方法包括如下步骤:
步骤 1 : 鳖曱粗粉, 加水, 回流提取, 浓缩, 浓缩液; 步骤 2: 步骤 1的浓缩液加醇进行醇沉, 得到醇沉部分;
步骤 3: 步骤 1的醇沉部分进行分离, 检测, 收集 SEQ.ID.N0.2寡肽。 上述 SEQ.ID.N0.2寡肽的制备方法, 其中步骤 2中优选 2-4次醇沉,每次 醇沉乙醇的浓度由低至高。
所述步骤 3的分离为先进行阳离子交换树脂分离, 后进行凝胶柱层析; 所述步骤 3的检测可以采用高效液相 ( HPLC )方法检测,质谱( ESI-MS ) 确证。
上述 SEQ.ID.N0.2寡肽的制备方法, 其中步骤 2为: 步骤 1的回流提取液 加乙醇至醇浓度为 20%, 离心, 上清液继续加乙醇至醇浓度为 60%, 离心, 上清液继续加乙醇至醇浓度为 80%;
上述 SEQ.ID.N0.2寡肽的制备方法, 其中步骤 3优选为: 将乙醇沉淀部 分溶解, 先进行阳离子交换树脂分离, 后进行 Sephadex LH-20凝胶柱层析, HPLC检测, 收集 SEQ.ID.N0.2寡肽。
上述 SEQ.ID.N0.2寡肽的制备方法, 其中步骤 3: 取 80%醇沉部分, 水溶, 上阳离子交换树脂, PH=4-5 的緩沖液洗脱, 收集双缩尿试剂反应阳性部分, 合并,冷冻干燥,水溶,上 Sephadex LH-20凝胶柱层析,纯水洗脱,收集 HPLC 检测单一色语峰流分, 合并, 冷冻干燥, 收集 SEQ.ID.N0.2寡肽。
上述 SEQ.ID.N0.2寡肽的制备方法, 其中步骤 1 中鳖曱粗粉(醋制 )加 6- 10倍量水,回流提取 1 -3次,每次 1 -2小时,提取液浓缩至相对密度为 1.1 - 1.13。
所述寡肽序列的鉴定步骤如下:
1、 利用双缩脲反应进行化学鉴定, 后分别对水, 乙酸乙酯、 丙酮、 氯仿等 溶剂的溶解性进行鉴定;
2、 测定所述的寡肽的分子量, ESI-MS: 517 ( M+Na ) , 495 ( M+H );
3、 进行硅胶薄层鉴定初步确定氨基酸的种类;
4、 利用电喷雾质谱( ESI-MS )及氨基酸自动分析仪进行分析得到两种寡肽 的氛基酸序列。
本发明还进一步提供 SEQ.ID.N0.2 寡肽的制备方法, 该方法用液相合成 方法得到。
本发明还进一步提供 SEQ.ID.N0.2 寡肽的制备方法, 该方法用固相合成 方法得到。
本发明提供任何可方便给药形式的 SEQ.ID.N0.2 寡肽的药用组合物, 包 括经口或胃肠外给药形式。 它们特别适合制备为经注射给药形式。
上述 SEQ.ID.N0.2寡肽可可加入药学上常规的辅料, 制备成各种剂型, 包 括注射剂、 片剂 (骨架片、 包衣片、 分散片等)、 胶嚢剂、 微乳剂、 緩释剂、 控释剂、 脂质体等剂型、 颗粒剂、 栓剂、 液体制剂如口服。
为使上述剂型能够实现, 需在制备这些剂型时加入药学可接受的辅料, 例 如: 例如: 溶剂、 填充剂、 崩解剂、 润滑剂、 助悬剂、 粘合剂、 甜味剂、 矫味 剂、 防腐剂、 基质等。 溶剂包括注射用水、 甘油、 聚乙二醇; 填充剂包括: 淀 粉、 预胶化淀粉、 乳糖、 甘露醇、 曱壳素、 微晶纤维素、 蔗糖等; 崩解剂包括: 淀粉、 预胶化淀粉、 微晶纤维素、 羧曱基淀粉钠、 交联聚乙烯吡咯烷酮、 低取 代羟丙纤维素、 交联羧曱基纤维素钠等; 润滑剂包括: 硬脂酸镁、 十二烷基硫 酸钠、 滑石粉、 二氧化硅等; 助悬剂包括: 聚乙烯吡咯烷酮、 微晶纤维素、 蔗 糖、 琼脂、 羟丙基曱基纤维素等; 粘合剂包括, 淀粉浆、 聚乙烯吡咯烷酮、 羟 丙基曱基纤维素等; 甜味剂包括: 糖精钠、 阿斯帕坦、 蔗糖、 甜蜜素、 甘草次 酸等; 矫味剂包括: 甜味剂及各种香精; 防腐剂包括: 尼泊金类、 苯曱酸、 苯 曱酸钠、 山梨酸及其盐类、 苯扎溴铵、 醋酸氯乙定、 桉叶油等; 基质包括: PEG6000, PEG4000, 虫蜡等。
本发明进一步提供抗乙肝病毒或抗肝纤维化的方法,该方法包括每日给予 需要的药学上可接受形式的 SEQ.ID.N0.2。 能的药物中的应用。
本发明进一步提供 SEQ.ID.N0.2在制备抗乙肝病毒药物中的应用。
本发明进一步提供 SEQ.ID.N0.2在制备抗抗肿瘤药物中的应用。 附图说明:
附图 1 : 寡肽化合物 1的液相图;
附图 2: 寡肽化合物 2的液相图;
附图 3-11 : 寡肽化合物 1氨基酸分析仪得到的氨基酸序列图, 附图 3: 空白对 照图, 附图 4: N端甘氨酸分析图, 附图 5: N端丙氨酸分析图, 附图 6: N 端甘氨酸分析图, 附图 7: N端脯氨酸分析图, 附图 8: N端组氨酸分析图, 附图 9: N端甘氨酸分析图, 附图 10: N端甘氨酸分析图, 附图 11 : 标准氨 基酸图;
附图 12-19: 寡肽化合物 2氨基酸分析仪得到的氨基酸序列图, 附图 12: 空白 对照图, 附图 13: N端甘氨酸分析图, 附图 14: N端丙氨酸分析图, 附图 15: N端甘氨酸分析图, 附图 16: N端脯氨酸分析图, 附图 17: N端组氨酸分析 图, 附图 18: N端甘氨酸分析图, 附图 19: 标准氨基酸序列图。 具体实施方式
以下为本发明化合物的实施例, 但这些实施例并不意味着对本发明的限制。 实施例 1 鳖曱中寒肽类化学成分的鉴识、 提取、 分离和纯化
1. 鳖曱肽类化合物的鉴识 -双缩脲反应
1.1 仪器与试药
DK-98-I型恒温水浴锅; RE-52A型旋转蒸发器; SHB-III型循环水式多用真 空泵; 鳖曱药材购于同仁堂药店, 经北京中医药大学中药学院刘春生教授鉴定 为鳖科动物鳖 Trionyx Sinensis Wiegman.的背曱; 阳离子交换树脂和 Sephadex LH-20均为进口分装, 所用化学试剂均为分析纯。
1.2方法与结果
取鳖曱水提液 2mL至试管中, 加水稀释至 5mL后加入 4%NaOH溶液 1滴 和 1%CUS04溶液 1滴, 摇匀, 随行空白对照, 观察显色。 鳖曱水提物溶液呈 蓝紫色。
1.3结论
鳖曱水提物溶液与双缩脲反应阳性, 表明鳖曱中确实有肽类化合物。
2. 整曱中寡肽类化合物的提取、 分离和纯化
2.1 仪器与试药 (同 1.1仪器与试药) 2.2 提取、 分离和纯化
取鳖曱粗粉 ( 1mm士 0.1mm ) 200g, 加 2000ml蒸馏水回流提取 3次, 每次 2小 时, 提取液浓缩至相对密度为 1.1-1.13 , 依次加乙醇至醇浓度为 20%、 60%、 80%; 取 80%醇沉部分, 水溶 20ml或至全溶, 进行阳离子交换树脂分离, 用 PH=4-5的緩沖液洗脱( 5%NaAC溶液, HAc调 PH为 4.5 ), 收集双缩脲试剂 反应阳性部分, 合并, 冷冻干燥, 水溶, 后 Sephadex LH-20凝胶柱层析, 纯 水洗脱, HPLC检测 【HPLC检测条件: 色语柱: SB-C18(5 m, 4.6x250mm), 流速: l.Oml/min; 紫外检测波长: 234nm, 210nm; 进样量: ΙΟμΙ^; 柱温: 35 °C , 流动相: 5%乙腈 - 0.1%三氟乙酸水溶液】, 收集保留时间 2.67分钟单一流份, 合并, 冷冻干燥, 得到寡肽化合物 1 ( 20mg ) (图 1 ), 收集保留时间 4.89分钟 单一流份, 合并, 冷冻干燥, 得到寡肽化合物 2 ( 10mg ) (图 2 )。 实施例 2 寡肽 GAGPHGG和 GAGPHG的鉴定
1.材料与仪器
化合物 1 (自制), 经 HPLC归一化法纯度测定大于 98%;
化合物 2 (自制), 经 HPLC归一化法纯度测定大于 98%;
Agilent 1100 LC-MSD series trap (双高压溶剂泵, 在线真空脱气机, 自动进 样器, 柱温箱, DAD检测器, ESI离子阱质语检测器, 美国安捷伦公司); 氨基酸自动分析仪( ABI PROCISETM492cLC );
三氟乙酸(TFA, 美国 Sigma公司 ), 乙腈(色谱纯, fisher公司 ), 盐酸(分 析纯)
2.鉴定
化合物 1 : 取实施例 1制备的其中一种白色无定形粉末。 进行双缩脲反应呈阳 性,易溶于水,不溶于乙酸乙酯、丙酮、氯仿等非极性溶剂。 ESI-MS:574( M+Na ), 552 ( Μ+Η 氨基酸种类的确定: 浓 HC1水解后, 硅胶薄层检识(薄层条件: 硅胶 G板, 正丁醇 -冰醋酸-乙醇-水(4:1:1:2 ) 为展开剂, 展开, 取出, 晾干, 喷以 0.5%茚三酮丙酮溶液, 105°C加热至斑点显色清晰),经与标准氨基酸(甘 氨酸(G )、 丙氨酸(A )、 脯氨酸(P )、 组氨酸(H )共薄层对照, 确定化合 物 1氨基酸的种类为甘氨酸(G )、 丙氨酸(A )、 脯氨酸(P )、 组氨酸(H )。 利用氨基酸序列自动分析仪分析, 得到氨基酸序列分析(图 3-11 ), 测序结果 为 : GAGPHGG , 其氨基酸序 列 进一步进行 ESI-MS 分析为
GG), 132(GG),75(G)和 478(GAGPHG)、 421(GAGPH)、 284(GAGP)、 187(GAG)、 130(GA)、 59( G+H-OH )数据所确证,其中,质谱条件为: Mass Rang Mode: Ultra Scan, Ion Polarity : positive, Ion Source Type : ESI, Dry Temp :350, Nebulizer :50.00psi, Dry Gas : 10.001/min。
化合物 2: 白色无定形粉末。 双缩脲反应阳性, 易溶于水, 不溶于乙酸乙 酯、 丙酮、 氯仿等非极性溶剂。 ESI-MS:517 ( M+Na ) , 495 ( Μ+Η )。 氨基酸 种类的确定: 浓 HCl水解后, 硅胶薄层检识(薄层条件: 硅胶 G板, 正丁醇- 冰醋酸-乙醇-水(4: 1 : 1 :2 )为展开剂, 展开, 取出, 晾干, 喷以 0.5%茚三酮丙 酮溶液, 105°C加热至斑点显色清晰), 经与标准氨基酸(甘氨酸(G )、 丙氨 酸(A )、 脯氨酸(P )、 组氨酸(H ) )共薄层对照, 确定化合物 2氨基酸的种 类为甘氨酸(G )、 丙氨酸(A )、 脯氨酸(P )、 组氨酸(H )。 对上述的寡肽利 用氨基酸序列自动分析仪分析,得到氨基酸序列分析, 测序结果为: GAGPHG
( 图 12-19 )。 对化合物 2 氨基酸序歹 'j 进行 ESI-MS 分析为 ESI-MS(M/e):494(GAGPHG),423(AGPHG), 366(GPHG), 269(PHG), 132(HG),75(G)和 421(GAGPH) 、 284(GAGP) 、 187(GAG) 、 130(GA) 、 59
( G+H-OH )。
其中, 质谱条件为: Mass Rang Mode : Ultra Scan, Ion Polarity : positive, Ion Source Type: ESI, Dry Temp :350, Nebulizer :50.00psi, Dry Gas : 10.001/min。
实施例 3 寡肽 GAGPHGG和 GAGPHG的合成
1.材料与仪器
制备液相色谱仪; 冷冻干燥机; RE-52A型旋转蒸发器; SHB-III型循环水 式多用真空泵;
Agilent 1100 LC-MSD series trap (双高压溶剂泵, 在线真空脱气机, 自动进 样器, 柱温箱, DAD检测器, ESI离子阱质语检测器, 美国安捷伦公司); 氨基酸自动分析仪( ABI PROCISETM492cLC ) ;
WANG树脂 (天津南开和成科技有限公司)、 Sephadex LH-20, 保护氨基 酸均为进口分装, 化学试剂均为分析纯。
2.合成
参照黄惟德. 《多肽合成》 .科学出版社, 1985,第 1版固相合成部分。
2.1 GAGPHGG的合成:
将 Fmoc-G-OH(O. lmol) (氨基被 9-芴曱氧羰基保护的甘氨酸)及 HOBT ( 1- 羟基苯并三唑) (O. lmol)溶于二氯曱烷(DCM ) 中, 然后加入 DIC(N, N-二异 丙基碳二亚胺)( O.lmol ),搅拌 lOmin,再加入已溶胀好的 Wang树脂( 0.04mol ), 加入 DMAP (催化量 4-二曱氨基吡啶) ( 0.004mol ) , 密封反应容器, 控温 25°C-28°C , 反应 10 h, 停止反应, 滤去反应液, 用 DMF洗剂反应 Wang树脂 2次, 滤去 DMF; 用 20%PIP/DMF试剂反应 15-20min脱保护后, 用 DCM洗 剂树脂多次; 加入试剂 1 (制备方法 0.4molFmoc-G-OH及 0.4molHOBT溶于 DCM中, 然后加入 O. lmol DIC, 搅拌 10min )、 0.004mol DMAP, 反应 10h, 停止反应, 滤去反应液, 用 DMF洗剂反应 4对脂 2次, 滤去 DMF;
参照上述步骤, 依次缩合 Fmoc-H-OH、 Fmoc-P-OH、 Fmoc-G-OH、 Fmo c-A-OH、 Fmoc-G-OH合成反应完毕, 加入裂解液( TFA-硫代苯曱醚 -1 , 2- 乙二硫醇-苯曱醚,体积比为 205 : 12.5: 7.9: 4.6),避光搅拌反应 3 h。 过滤,适 量 TFA洗涤树脂。 滤液加入冰冻的无水乙醚中,密封,陈化 3 h。 离心收集沉淀, 适量冰冻无水乙醚洗涤。 沉淀水溶, 经 Sephadex LH-20凝胶柱脱盐后, 继上 制备型 HPLC, 收集单一色语峰流分, 合并, 冷冻干燥, 产率 15.5%。 ESI-MS 分析, 出现 574 ( M+Na ) , 552 ( M+H ), 551 (GAGPHGG),494(AGPHGG),423 (GPHGG), 366(PHGG), 269(HGG), 132(GG),75(G)和 478(GAGPHG)、 421(GA GPH)、 284(GAGP)、 187(GAG)、 130(GA)、 59 ( G+H-OH )„ HPLC 归一化法 纯度分析 99.0%。 HPLC归一化法纯度分析 99.0%。
2.2 GAGPHG的合成:
将 Fmoc-G-OH(0. lmol)及 HOBT(0. lmol)溶于二氯曱烷( DCM )中, 然后加 入 DIC ( O. lmol ), 搅拌 lOmin, 再加入已溶胀好的 Wang树脂 ( 0.04mol ), 加 入 DMAP ( 0.004mol ), 密封反应容器, 控温 25。-28。反应 10h, 停止反应, 滤 去反应液, 用 DMF洗剂反应树脂 2次, 滤去 DMF; 用 20%PIP/DMF试剂反 应 15-20min 脱保护后, 用 DCM 洗剂树脂多次; 加入试剂 1 (制备方法 0.4molFmoc-H-OH及 0.4molHOBT溶于 DCM中, 然后加入 O.lmol DIC,搅拌 10min )、 0.004mol DMAP, 反应 10h, 停止反应, 滤去反应液, 用 DMF洗剂 反应树脂 2次, 滤去 DMF;
参照上述步骤, 依次缩合 Fmoc-P-OH、 Fmoc-G-OH、 Fmoc-A-OH、 Fmoc-G-OH合成反应完毕,加入裂解液( TFA-硫代苯曱醚 -1 , 2-乙二硫醇 -苯曱 醚,体积比为 205 : 12.5: 7.9: 4.6),避光搅拌反应 3 h。 过滤,适量 TFA洗涤树 脂。 滤液加入冰冻的无水乙醚中,密封,陈化 3 h。 离心收集沉淀,适量冰冻无水 乙醚洗涤。 沉淀水溶, 经 Sephadex LH-20凝胶柱脱盐后, 继上制备型 HPLC, 收集单一色谱峰流分, 合并, 冷冻干燥, 产率 20.5%。 ESI-MS分析, 出现 517
( M+Na ), 495 ( M+H ), 494(AGPHGG),423(GPHGG), 366(PHGG), 269(HGG), 132(GG),75(G)和 421(GAGPH) 、 284(GAGP) 、 187(GAG) 、 130(GA) 、 59
( G+H-OH )。 HPLC归一化法纯度分析 99·0%。
实施例 4 寡肽 GAGPHGG抗鸭乙肝病毒活性测定
1.材料
1.1 动物: 1日龄北京鸭, 购自北京前进种鸭饲养场;
1.2 药物: 七肽 GAGPHGG (自制测定大于 98%);阳性药物拉米夫定 (葛兰素威康 制药公司)。
1.3 主要试剂: 鸭乙型肝炎病毒 DNA(DHBV-DNA )强阳性鸭血清 (采自上海麻 鸭, - 70°C保存); a-32p-dCTP (北京福瑞生物技术工程公司); 缺口翻译药盒 (普 洛麦格公司); Sephadex G-50、 Ficoll P VP (瑞典 Pharmacia公司; SDS (Merck公 司);鱼精 DNA、 牛血清白蛋白(中国科学院生物物理研究所)。
2.方法
2.1 DHBV感染: 1曰龄北京鸭,经腿胫 iv DHBV-DNA强阳性鸭血清,感染后 7d 取血,分离血清, -70 V保存。
2.2 药物治疗试验: DHBV感染鸭随机分组, 七肽给药组分别为 0.5mg/Kg、 lmg/Kg皮下注射, 每 2天一次, 给药 10d, 病毒对照组,以生理盐水代替药物; 阳性药物 (拉米夫定)组, po药物 50mg/kg,每天 2次,连续 10d。 给药前、 给药 5、 10 d和停药后 3d,分别自鸭腿胫静脉取血,分离血清, -70°C保存待检。
2.3检测方法: 取上述待检鸭血清,每批同时点膜,测定鸭血清中 DHBV-DNA 的动态水平。 按缺口翻译试剂盒说明书方法,用 32p标记 DHBV-DNA探针, 作 鸭血清斑点杂交,放射自显影膜片斑点,测定吸光度 )值(490 nm), 计算血清 DHBV-DNA 密度,以杂交斑点 A值作为标本 DHBV-DNA 水平值。
2.4 药效计算: 计算每组不同时间点血清 DHBV-DNA 水平的 ±s, 各组用药 前后比较采用配对检验, 计算 DHBV-DNA抑制率, 比较各组鸭血清
DHBV-DNA抑制率的动态变化。给药组与病毒对照组比较, 采用成组 检验。 DHBV-DNA抑制率 = (给药前 A值- 给药后 A值) /给药前 A值 xl00%
3 结果
DHBV 2DNA感染鸭各组用药前后血清 DHBV-DNA 水平半定量结果见 表 1。 低剂量组(0.5mg/kg )给药后与病毒对照组比较, 鸭血清 DHBV-DNA 水 平无显著性降低; 高剂量组(lmg/kg )给药后 10d和停药后 3d与病毒对照组比 较, 鸭血清 DHBV-DNA抑制率显著提高,停药后鸭血清 DHBV-DNA持续降 低。 表 1 七肽对 DHBV感染鸭血清 DHBV-DNA 水平的影响 ( ± n= 6) 剂 A( 给 A( 抑制 抑制 抑制 量 it) 5d) Wd) 3d) 率0 h 率0 k 率0 k mg/ 给药 给药 kg 5d lOd 3d
- 1.083±0. 1.158±0. 1.248±0.2 1.328±0.1 -6.93 -15.2 -22.6
24 16 0 8 4 2
0.5 3.65
1 1.286±0. 1.239±0. 1.198±0.1 1.184±0.1 5.49 6.84 7.93
25 12 16 8 9 6.39 29.91 30.61
1.274±0. 1.204±0. 0·893±0· 1 0.884±0.1
14 21 3 6 48.90 10.72
1.362±0. 1 ·275±0· 0.696±0.2 1.216±0.2
18 09 3 6
与对照组比较, ** Ρ<0.01
4.结论
七肽 GAGPHGG ( lmg/kg )有一定抑制鸭乙肝病毒作用 实施例 5 寡肽 GAGPHGG对小鼠急性肝损伤的保护作用
1.材料
1.1 动物: 健康昆明小鼠 (20g左右, 北京维通利华实验动物技术有限公司)。
1.2 药物: 七肽 GAGPHGG (自制测定大于 98%);阳性药物联苯双酯滴丸 (北京协 和药厂:)。
1.3 主要试剂: 丙氨酸氨基转移酶 (ALT),天冬氨酸转氨酶 (AST)、谷胱甘肽过氧 化物酶 (GSH-Px)和丙二醛 (MDA) 试剂盒均购自南京建成生物工程研究所,其 他试剂均为国产分析纯. 使用的仪器有小型离心机( Sigma 型) 、 ,11 型 分光光度计 (厦门分析仪器厂) 等。 2.方法: 取 60只雄性昆明种小鼠,按照随机数字表法分为正常对照组、 模型对 照组、联苯双酯组、七肽大、 小剂量组, 后 2组分别按 0.17mg/kg、 0.085mg/kg 的剂量皮下注射,每 2日一次,连续 7d;联苯双酯组按 100mg/ kg的剂量灌胃, 每日 1次,连续 7 d; 正常对照组和模型对照组皮下注射等体积生理盐水; 末次 给药 1 h后,除正常对照组外,其余各组均按照 5mL/kg剂量腹腔注射给予 0.15 % 的四氯化碳橄榄油溶液,禁食,不禁水, 12h后目艮球取血,分离血清,备用, 取血后 处死小鼠, 解剖, 取出肝脏, 匀浆, 备用。 按照试剂盒说明测定各组小鼠血清 ALT , AST 活性和肝组织 GSH-Px活性及 MDA含量, 所有数据以均数士标准 偏差 (x±SD)表示,各组样本均数间差别的假设检验采用方差分析。
3.结果
3.1 七肽对血清 ALT和 AST 活性的影响 由表 2可见,七肽大、 小剂量组小鼠 血清 ALT,AST活性较模型对照组明显下降,相比较均有显著性差异 (Ρ Ο.ΟΙ)» 表 2七肽对四氯化碳所致肝损伤小鼠血清 ALT和 AST活性的影响 (x±s,U/L) 组别 n 剂量 ( mg/kg ) ALT AST 正常对照组 12 - 36.24 ±9.62 141.36 ±11.26 模型对照组 12 - 346.72 ±46.17 286.78 ±42.15 七肽组 12 0.085 123.24 186.97
±19.73 ±37.56
12 0.17 86.52 ±28.72" 148.62
±31.25 联苯双酯组 12 100 92.36 ±35.27" 156.24
±34.12 与对照组比较, ** P<0.01
3.2七肽对肝组织 GSH-Px活性和 MDA含量的影响 由表 3可见,七肽大、 小 剂量组小鼠肝组织 GSH-Px活性明显高于模型对照组, MDA含量明显低于模型 对照组,相比较均有显著性差异( P<0.01)。
表 3七肽对肝组织 GSH-Px活性和 MDA含量的影响 (x±s mol/ g)
组别 n 剂量(mg/kg ) GSH-PX MDA 正常对照组 12 - 317.56 ±26.52 1.82 ±1.21 模型对照组 12 - 2.27 ±14.71 11.52 ±2.51 七肽组 12 0.085 267.18 6.48 ±1.65**
±32.13**
12 0.17 308.28 2.75士 1.36** 士 38.54**
联苯双酯组 12 100 296.82 5.29士 1.25**
±18.31 **
与对照组比较, ** P<0.01
4.结论: 七肽可显著抑制四氯化碳所致急性肝损伤小鼠血清 ALT , AST 活性 升高,对四氯化碳急性肝损伤具有保护作用。
实施例 6 寡肽 GAGPHGG抗大鼠肝纤维化作用的实验研究
1.材料
1.1 动物: 健康雄性 SD 大鼠 (150±10g, 北京维通利华实验动物技术有限公 司)。
1.2 药物: 七肽 GAGPHGG (自制测定大于 98%);阳性药物联苯双酯滴丸 (北京协 和药厂:)。
1.3 主要试剂: 丙氨酸氨基转移酶 (ALT),天冬氨酸转氨酶 (AST)、谷胱甘肽过氧 化物酶 (GSH-Px)、 丙二醛 (MDA) 、 TGF-PmRNA原位杂交试剂盒和大鼠 ΉΜΡ- ELISA试剂盒均购自南京建成生物工程研究所,其他试剂均为国产分析纯.。
2.方法: 将 48只大鼠随机分为对照组、 模型组、 七肽大剂量和七肽小剂量, 每 组 12只。 用橄榄油将 CC14配成 40 %的溶液, 按 5ml/kg给动物皮下注射, 每周 2 次, 共 8wk; GAGPHGG干预组在造模的同时给予七肽皮下注射 (浓度 0.12mg / kg, 0.06mg / kg, 每 2天 1次, 共 8周)。 各组动物在最后一次 CC14注射后 48h 处死, 取血清和肝组织标本待检。 血清按照试剂说明书检测 ALT,AST及 TGFpi 水平, 肝组织标本以中性福尔马林溶液固定、 石蜡包埋, 以多聚赖氨酸涂布的 载玻片制作 5ttm组织切片, 进行 HE染色和 Masson三重胶原染色作组织病理学 检查。
3.结果
3.1 七肽对肝纤维化大鼠血清 ALT和 AST水平的影响 由表 4可见,七肽大、小 剂量组肝纤维化大鼠 ALT,AST水平较模型对照组明显下降,相比较均有显著性 差异 (P <0.01)。
表 4七肽对肝纤维化大鼠血清 ALT和 AST7J平的影响 (x±s,U/L)
组别 n 剂量 ( mg/kg ) ALT AST 正常对照组 12 - 38.67 ±8.46 85.63 ±12.21 模型对照组 10 - 296.38 ±76.82 484.51 七肽组 12 0.06 148.24 ±136.06
±32.52 180.35
±28.49
12 0.12 96.37 ±35.12** 108.75
±42.21 与对照组比较, ** Ρ<0.01
3.2七肽对肝纤维化大鼠肝组织 TGFpi和胶原面积的影响 由表 5可见, 四氯 化碳诱导的肝纤维化大鼠血清 TGFP1水平显著升高 (PO.01),表明肝纤维化形 成过程伴随有 TGFpi合成的显著增加,从而促进肝脏胶原纤维的合成与沉积; 七肽大剂量组预防性治疗的大鼠血清 TGFpi水平则显著减少 (与模型组比较 PO.01 ), 肝脏胶原平均面积亦显著减少 (与模型组比较 PO.01 )七肽小剂量 组有减少的趋势, 但无统计学意义。
表 5七肽对肝纤维化大鼠肝组织 TGFpi和胶原面积的影响 (x±s) 组别 n 剂量 ( mg/kg ) TGF i ( mg/L ) 胶原面积
( μηι2 ) 正常对照组 12 - 15.62±6.59 66.28 ±13.52 模型对照组 10 - 96.82±16.32 632.57 七肽组 12 0.06 74.24±18.58 ±121.36
380.82 ±78.89
12 0.12 32·65±11·02** 138.12
±62.58 与对照组比较, ** Ρ<0.01
4.结论: 七肽 GAGPHGG有一定抗肝纤维化作用, 其抗肝纤维化机理尚需进一 步研究。 实施例 7 取七肽 GAGPHGGlOg, 加入注射剂 (包括冻干粉针剂和无菌分装干粉针 剂 )适当辅料, 按注射剂 (包括冻干粉针剂和无菌分装干粉针剂 )工艺制备成 注射剂。
实施例 8 取七肽 GAGPHGGlOg, 加入片剂 (包括緩控释片、 骨架片、 包衣片、 分 散片等)适当辅料, 按片剂 (包括緩控释片、 骨架片、 包衣片、 分散片等)工 艺制备成舌下片、 片剂。
实施例 9 取七肽 GAGPHGGlOg, 加入胶嚢剂适当辅料, 按胶嚢剂工艺制备成肠溶 胶嚢剂、 胶嚢剂。
实施例 10 取七肽 GAGPHGG 10g, 加入乳剂 (包括微乳、 纳米乳等)适当辅料, 按 乳剂 (包括微乳、 纳米乳等)工艺制备成微乳剂。
实施例 11 取七肽 GAGPHGGlOg, 加入緩释控释剂适当辅料, 按緩释控释剂工艺制 备成各种緩释、 控释剂。
实施例 12 取七肽 GAGPHGGlOg, 加入脂质体剂型适当辅料, 按脂质体工艺制备成 各种脂质体剂型。

Claims

权利要求 书
1、 一种具有 SEQ.ID.NO.l ( GAGPHGG )氨基酸序列的寡肽。
2、 如权利要求 1所述的寡肽, 其为 L型氨基酸或 D型氨基酸。
3、 如权利要求 1所述的寡肽, 其由鳖曱中分离。
4、 如权利要求 1所述的寡肽的制备方法, 其为液相或固相合成方法。
5、 如权利要求 3所述的寡肽的制备方法, 该方法包括如下步骤: 步骤 1 : 鳖曱粗粉, 加水, 回流提取, 浓缩, 浓缩液;
步骤 2: 步骤 1的浓缩液加醇进行醇沉, 得到醇沉部分;
步骤 3: 步骤 2的醇沉部分进行分离, 检测, 收集 SEQ.ID.NO.l寡肽。
6、 如权利要求 5所述的方法, 其中: 步骤 2中醇沉 2-4次, 每次醇沉乙 醇的浓度由低至高。
7、 如权利要求 5所述的方法, 其中步骤 3的分离为先进行阳离子交换树 脂分离, 后进行凝胶柱层析。
8、 如权利要求 5所述的方法, 其中所述步骤 3的检测为采用高效液相方 法检测, 质谱(ESI-MS )确证。
9、 一种药物组合物, 包括活性成分为权利要求 1的寡肽及药学上可接受 的载体。
10、 一种抗 HBV或肝纤维化的方法, 该方法包括每日给予需要的药学上 可接受形式的 SEQ.ID.NO.1。
11、 SEQ.ID.NO.l 在制备用于治疗肝纤维化和 /或治疗乙肝和 /或改善肝功 能的药物中的应用。
12、 SEQ.ID.NO.l在制备抗 HBV药物中的应用。
13、 一种具有 SEQ.ID.N0.2 ( GAGPHG )氨基酸序列的寡肽。
14、 如权利要求 13所述的寡肽, 其为 L型氨基酸或 D型氨基酸。
15、 如权利要求 13所述的寡肽, 其由鳖曱中分离。
PCT/CN2011/081620 2011-11-01 2011-11-01 一种治疗肝纤维化和/或治疗乙肝和/或改善肝功能的寡肽 WO2013063755A1 (zh)

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