WO2007009359A1 - Derives de thymosine beta 4 et utilisation - Google Patents

Derives de thymosine beta 4 et utilisation Download PDF

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Publication number
WO2007009359A1
WO2007009359A1 PCT/CN2006/001679 CN2006001679W WO2007009359A1 WO 2007009359 A1 WO2007009359 A1 WO 2007009359A1 CN 2006001679 W CN2006001679 W CN 2006001679W WO 2007009359 A1 WO2007009359 A1 WO 2007009359A1
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Prior art keywords
ala
gly
group
thymosin
derivative
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PCT/CN2006/001679
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English (en)
French (fr)
Inventor
Liya Nie
Suyong Ma
Songshan Xu
Meiyu Wen
Original Assignee
Beijing Northland Biotech Co., Ltd.
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Priority claimed from CN 200510083894 external-priority patent/CN1896096A/zh
Priority claimed from CNB2005101032937A external-priority patent/CN100484957C/zh
Application filed by Beijing Northland Biotech Co., Ltd. filed Critical Beijing Northland Biotech Co., Ltd.
Priority to EP06761426A priority Critical patent/EP1908779B1/en
Priority to US11/995,817 priority patent/US7816321B2/en
Priority to JP2008520699A priority patent/JP5180074B2/ja
Priority to PL06761426T priority patent/PL1908779T3/pl
Priority to CN200680025339A priority patent/CN100582121C/zh
Publication of WO2007009359A1 publication Critical patent/WO2007009359A1/zh

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    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07KPEPTIDES
    • C07K14/00Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
    • C07K14/435Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
    • C07K14/575Hormones
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07KPEPTIDES
    • C07K14/00Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
    • C07K14/435Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
    • C07K14/575Hormones
    • C07K14/57581Thymosin; Related peptides
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K38/00Medicinal preparations containing peptides
    • A61K38/16Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
    • A61K38/17Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
    • A61K38/22Hormones
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P17/00Drugs for dermatological disorders
    • A61P17/02Drugs for dermatological disorders for treating wounds, ulcers, burns, scars, keloids, or the like
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P27/00Drugs for disorders of the senses
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P27/00Drugs for disorders of the senses
    • A61P27/02Ophthalmic agents
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P9/00Drugs for disorders of the cardiovascular system
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P9/00Drugs for disorders of the cardiovascular system
    • A61P9/10Drugs for disorders of the cardiovascular system for treating ischaemic or atherosclerotic diseases, e.g. antianginal drugs, coronary vasodilators, drugs for myocardial infarction, retinopathy, cerebrovascula insufficiency, renal arteriosclerosis
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K38/00Medicinal preparations containing peptides

Definitions

  • Thymosin ⁇ 4 derivative and its application
  • the present invention relates to novel thymosin
  • the invention further relates to a pharmaceutical composition comprising the ⁇ 4 derivative.
  • the invention further relates to the use of the ⁇ 4 derivative for the preparation of a medicament for the treatment of skin tissue damage, cardiac tissue damage, corneal damage and/or coronary heart disease.
  • the present invention also relates to a method of treating diseases of skin tissue damage, cardiac tissue damage, corneal damage and/or coronary heart disease using the ⁇ 4 derivative.
  • the immune system is the body's defense system.
  • the main cells involved in the immune response are lymphocytes, lymphocytes and macrophages.
  • the thymus is an immune central organ for the development and differentiation of sputum lymphocytes.
  • the thymus factor (or hormone) secreted by the thymus is a series of essential substances required for the development and differentiation of sputum lymphocytes.
  • ⁇ 4 is a major thymus factor with a clear structure and function. It is well known in the art that ⁇ 4 is Golds tein et al., (THE JOURNAL OF BIOLOGICAL CHEMISTRY, Vol. 257, No. 2, pp.
  • Thymosin component 5 (TF5) comprising 43 number of base acids, as shown in SEQ ID NO: 1, a molecular weight of 4.963 KD, free of disulfide bonds and glycosylation.
  • ⁇ ⁇ - is a protein expressed by the embryo during the onset of the heart. It promotes the migration of heart cells and affects the survival of these cells (Thymos in beta 4 act ivates integrin-1 inked kinase and promotes cardiac cel l migrat ion, survival And cardiac repair. Nature, Vol. 432, November 25, 2004).
  • This protein can prevent cell death and limit the extent of scar tissue formation after a real face-induced heart attack.
  • ⁇ ⁇ -4 already 9 is used in clinical trials to promote healing of skin wounds. researchers believe that in the near future, ⁇ -4 protein will enter the clinical trial phase of heart disease treatment.
  • ⁇ 4 enhances the viability of embryos and postnatal cardiomyocytes in tissue culture, and intraperitoneally injects the protein after coronary artery ligation in rats. Successfully stimulates heart repair and activates Akt survival kinase.
  • the present inventors performed a protein tertiary structure analysis on the known ⁇ ⁇ -4, and modified the ⁇ -end of the protein by a genetic engineering method, and unexpectedly obtained an activity in skin tissue damage repair, cardiac tissue damage repair, and the like.
  • One aspect of the present invention relates to a novel ⁇ 4 derivative which is Gly-T ⁇ 4 represented by SEQ ID NO: 6, and Ala-T ⁇ 4 represented by SEQ ID NO: 5, respectively.
  • the Gly-T ⁇ and Ala - ⁇ ⁇ 4 can be produced by recombinant expression methods or chemical synthesis methods.
  • the Gly-T ⁇ 4 and Ala- ⁇ ⁇ 4 are obtained by recombinant engineering expression.
  • the ⁇ -terminally modified thymosin ⁇ 4 derivative is obtained by the following method: Gly-T 0 4 or Ala-T p 4, comprising the steps of:
  • E. coli preference based on the known ⁇ 4 amino acid sequence (SEQ ID NO: 1)
  • the codon is fully gene-synthesized into the ⁇ 4 DNA sequence, and a restriction enzyme cleavage site is added to the ⁇ terminal and C terminus corresponding to the encoded amino acid sequence, and the ⁇ -terminal modification is carried out to obtain a ⁇ 4 derivative:
  • the leader peptide nucleic acid sequence is obtained by synthesizing the leader peptide DNA sequence based on the known GST amino acid sequence using the E. coli preferred codon gene and adding a restriction enzyme site corresponding to the N-terminus and C-terminus of the encoded amino acid sequence.
  • leader peptide sequence prepared as described above, the ⁇ 4 derivative sequence, and the screening plasmid pBSK were treated with a restriction enzyme, and the concentration of each sample was calculated and added to the T4 linkage system at a certain molar ratio. Successfully transformed and screened recombinants.
  • the fusion protein gene was digested with a restriction enzyme, and the gene was ligated with the restriction plasmid pGM (this plasmid is a kanamycin resistance screening marker, which can express a large amount of GST-like fusion protein. Construct) the ligation, which is screened to obtain the correct recombinant.
  • the recombinant obtained as described above is transformed into an expression host strain, and the highly expressed genetically engineered bacteria are screened by expression, and then fermented to obtain an engineered bacteria having high expression of the target protein.
  • the high-pressure homogenizer disrupts the bacteria and centrifuges to obtain the supernatant containing the desired precursor protein.
  • the supernatant is applied to the GST affinity column, the target precursor protein is eluted and digested with thrombin, and then the sample is passed through the anion column. Further purification results in a final protein purity greater than 98% of the final product.
  • Another aspect of the invention relates to a pharmaceutical composition
  • a pharmaceutical composition comprising the ⁇ 4 derivative of the invention: Gly- ⁇ 4 and/or Ala- ⁇ ⁇ 4 , and optionally pharmaceutically acceptable Carrier.
  • the term “pharmaceutically acceptable” means that the pharmaceutical art is recognized for use in animals, and more particularly in humans.
  • carrier refers to a diluent, adjuvant (e.g., (completely or incompletely) Freund's adjuvant), an excipient, or a shield for containing or administering a therapeutic agent.
  • These pharmaceutical carriers may be sterile liquids such as water and oils, including oils derived from petroleum, animal, vegetable, or synthetic oils such as peanut oil, soybean oil, mineral oil, sesame oil, And so on. 7j is a preferred carrier when the pharmaceutical composition is administered intravenously.
  • Saline solutions as well as aqueous dextrose and glycerol solutions can also be used as liquid carriers, especially for injectable solutions.
  • Suitable pharmaceutical excipients include starch, glucose, lactose, sucrose, gelatin, malt, rice, flour, chalk, silica gel, sodium stearate, glyceryl monostearate, talc, sodium chloride, milk powder, glycerin, propylene , ethylene glycol, water, ethanol, and the like.
  • compositions may also contain minor amounts of wetting or emulsifying agents such as sodium hyaluronate or pH buffering agents.
  • wetting or emulsifying agents such as sodium hyaluronate or pH buffering agents.
  • These compositions may take the form of solutions, suspensions, emulsions, tablets, pills, capsules, sustained release formulations, and the like.
  • the pharmaceutical composition is in the form of a lyophilized injection containing 0. 01%-0. 2% of the thymosin derivative Gly-T ⁇ 4 or Ala-T ⁇ 4 , and 5 % mannitol, and a pharmaceutically acceptable carrier.
  • compositions of the present invention are formulated to be compatible with their intended route of administration.
  • routes of administration include, but are not limited to, parenteral, such as intravenous, intradermal, subcutaneous, buccal, intranasal (e.g., inhalation), transdermal (e.g., topical), transmucosal, and rectal administration.
  • the composition is formulated into a pharmaceutical composition suitable for intravenous, subcutaneous, intramuscular, buccal, intranasal, or topical administration to humans according to conventional procedures.
  • the composition for intravenous administration is a solution in a sterile isotonic aqueous buffer.
  • the composition may also contain a solubilizing agent and a local anesthetic such as ergotamine to reduce pain at the site of the injection.
  • the composition is an eye drop containing 50-50 ( ⁇ g/ml of the thymosin derivative Gly-T ⁇ 4 and/or Ala- ⁇ ⁇ 4 , and selected from chlorine An antibiotic of oxytetracycline or ofloxacin, and a pharmaceutically acceptable carrier; in still another embodiment of the present invention, the composition is an eye drop containing 50-50 ( ⁇ g/ml of thymosin) a derivative Gly- ⁇ 4 and/or Ala-T p 4, an appropriate amount of sodium hyaluronate, and a pharmaceutically acceptable carrier; in another embodiment of the invention, the composition is an eye drop, It contains 50-50 ( ⁇ g/ml of thymosin derivative Gly- ⁇ ⁇ 4 and / or Ala- ⁇ ⁇ 4, an appropriate amount of sodium hyaluronate, chloramphenicol or ofloxacin, and pharmaceutically acceptable Accepted by the carrier.
  • the composition may be formulated in the form of an ointment, a breast, a skin patch, a lotion, a gel, a shampoo, a spray, an aerosol, a solution, an emulsion, or Other forms well known to those skilled in the art. See, for example, Remington's Pharmaceutical Sciences and Introducing to Pharmaceutical Dosage Forms, 19th ed., Mack Publishing Company, Easton, Pennsylvania, 1995.
  • a viscous to semi-solid or solid form comprising a carrier or one or more excipients compatible with topical application and having a dynamic viscosity preferably greater than water is typically employed.
  • suitable formulations include, but are not limited to, solutions, suspensions, emulsions, breast bones, cartilage, powders, elixirs, remedies, and the like, if desired, sterile or with auxiliary agents (eg, preservatives, stabilizers, moisturizers)
  • the aerosol buffer, or salt is mixed to alter various characteristics such as, for example, osmotic pressure.
  • suitable topical dosage forms include sprayable aerosol formulations, wherein the active ingredient, preferably in association with a solid or liquid phase inert carrier, is packaged in a mixture containing a pressurized volatile (e.g., compressed gas, such as Freon) or in a squeeze bottle.
  • a pressurized volatile e.g., compressed gas, such as Freon
  • a moisturizing or wetting agent can also be added to the pharmaceutical compositions and dosage forms. Examples of such additional ingredients are well known in the art.
  • the pharmaceutical composition is in the form of cartilage, which contains 0.01 ° /. - 0. 2% of the thymosin derivative Gly-T ⁇ 4 or Ala- ⁇ ⁇ 4, and a pharmaceutically acceptable excipient such as petrolatum.
  • the composition may be formulated as an aerosol, spray, mist, or drop.
  • prophylactic or therapeutic agents for use in accordance with the present invention may be prepared using a suitable propellant (eg, dichlorodifluoromethane, trichloromonofluoromethane, dichlorotetrafluoroethane, carbon dioxide, or other suitable).
  • a suitable propellant eg, dichlorodifluoromethane, trichloromonofluoromethane, dichlorotetrafluoroethane, carbon dioxide, or other suitable.
  • the aerosol spray is presented in a form that is conveniently delivered by a pressurized pack or sprayer.
  • the dosage unit can be determined by providing a valve to deliver a metered amount.
  • Glue and cartridge used in an inhaler or insufflator by, for example, gelatin It can be formulated as a powder mixture containing the compound and a suitable powder base such as lactose or starch.
  • the pharmaceutical composition is a spray containing 5-50 ( ⁇ g/ml of thymosin derivative Gly- ⁇ ⁇ 4 or Ala- ⁇ ⁇ 4 , and 0 ⁇ 003 % of ethylparaben, and a pharmaceutically acceptable carrier.
  • the composition may be formulated as a tablet, a capsule, a pack, a soft pack, a solution, a suspension, and the like.
  • Pharmaceutically acceptable excipients such as binders (e.g., pregelatinized corn starch, polyvinylpyrrolidone, or hydroxypropyl decyl cellulose) can be used by conventional means; fillers (e.g., lactose, microcrystalline cellulose, Or hydrogen phosphate hooks; lubricants (such as magnesium stearate, talc, or silica); decomposition products (such as potato starch or sodium starch glycolate); or wetting agents (such as sodium lauryl sulfate) tablets or capsules .
  • Liquid preparations for buccal administration may take the form of, but are not limited to, solutions, syrups, or suspensions, or they may be in the form of a dry product, dissolved in water or other suitable medium before use.
  • Pharmaceutically acceptable additives such as suspending agents (for example, sorbitol syrup, cellulose derivatives, or hydrogenated edible fats); emulsifiers (such as lecithin or gum arabic); non-aqueous media (for example, almond oil, oily) can be used by conventional means.
  • suspending agents for example, sorbitol syrup, cellulose derivatives, or hydrogenated edible fats
  • emulsifiers such as lecithin or gum arabic
  • non-aqueous media for example, almond oil, oily
  • These liquid preparations are prepared by ester, ethanol, or fractionated vegetable oils; and preservatives such as methyl or propyl-p-hydroxybenzoate or sorbic acid.
  • the preparation may also suitably contain a buffer salt, a fragrance
  • the methods of the invention further comprise formulating a composition for parenteral administration by injection (e.g., by bolus injection or continuous infusion).
  • a composition for parenteral administration by injection may be presented in unit dosage forms containing additional preservatives (for example, in ampoules or in multi-dose containers).
  • the composition may take such forms as suspensions, solutions, or emulsions in oily or aqueous barriers, and may contain formulations such as suspending, stabilizing, and/or dispersing agents.
  • the active ingredient may be in powder form, using a suitable medium before use (eg sterile, No pyrogen water) dissolved.
  • media suitable for parenteral dosage forms include, but are not limited to, water for injection USP; aqueous media including, but not limited to, sodium chloride injection, Ringer's injection, glucose injection, glucose, and sodium chloride injection Liquid, and lactated Ringer's injection; water-miscible media including, but not limited to, ethanol, polyethylene glycol, and polypropylene glycol; and non-aqueous media including but not limited to corn oil, cottonseed oil, peanut oil, sesame oil, oleic acid B Ester, isopropyl myristate, and benzyl benzoate.
  • a further aspect of the invention relates to a ⁇ 4 ⁇ terminal modified derivative selected from the group consisting of Gly-T P 4 and Ala- ⁇ ⁇ 4 for the preparation of a treatment for cardiac tissue damage, skin tissue damage, corneal damage and/or coronary heart disease The use of the drug.
  • the Gly-T ⁇ 4 of the present invention has a significantly higher activity than the natural ⁇ ⁇ 4 in terms of the activity of damaged cardiac tissue repair, skin tissue damage repair, and corneal damage repair by model animal experiments. active.
  • the inventors first studied the effects of Gly- ⁇ 4 and Ala-T ⁇ 4 on cardiac tissue repair.
  • the researchers simulated coronary heart disease in 60 adult rats to simulate a heart attack, resulting in a rat left anterior descending artery ligation and reperfusion model.
  • the inventors have found that the thymosin derivatives Gly- ⁇ ⁇ 4 or Ala- ⁇ ⁇ 4 are capable of altering the metabolism of cells and creating more powerful cardiomyocytes which are resistant to hypoxia after heart attack.
  • the inventors also studied the effects of Gly-T ⁇ 4 and Ala- ⁇ ⁇ 4 on damaged epidermal tissue.
  • the length of wounds in rats smeared with thymosin Gly- ⁇ 4, Ala- ⁇ ⁇ 4 or ⁇ ⁇ 4 for 5 days was 50% smaller than that of the blank control, and the therapeutic effect of Gly- ⁇ ⁇ 4 or Ala- ⁇ ⁇ 4 was better than that of ⁇ 4 is obvious.
  • the inventors also studied the effect of Gly-T P 4 on damaged corneal tissue.
  • the injured cornea of the rats in the continuous eye thymosin Gly- ⁇ ⁇ 4 or ⁇ ⁇ 4 4 days completely recovered, while the cornea of the saline group did not recover, and severe inflammation and congestion occurred.
  • ⁇ 4 derivative Gly-T ⁇ 4 and/or Ala- ⁇ ⁇ 4 of the present invention has a significantly higher activity than natural ⁇ ⁇ 4 in the treatment of cardiac tissue damage, epidermal tissue damage, and corneal tissue damage. .
  • a further aspect of the invention relates to a method of treating cardiac tissue damage, epidermal tissue damage, and corneal tissue damage in a subject, particularly a human, using the ⁇ 4 derivative Gly- ⁇ ⁇ 4 and/or Ala- ⁇ ⁇ 4 .
  • the method of treating cardiac tissue damage, epidermal tissue damage, and corneal tissue damage comprises administering to the subject a therapeutically effective amount of the ⁇ 4 derivative Gly-T ⁇ of the present invention 4 and / or Ala-T p 4.
  • a suitable dose is an amount effective to treat heart tissue damage, epidermal tissue damage, and corneal tissue damage upon administration of the above pharmaceutical composition.
  • the amount present in each dose is about 100 g to 5 mg.
  • the amount of the appropriate dosage will vary depending on the condition of the patient and the mode of administration, but is generally from about 0.1 ml to 5 ml.
  • DRAWINGS Figure 1 shows the effect of injection of ⁇ 4 and Gly- ⁇ ⁇ 4 on rat heart wall thickness in a rat model.
  • Figure 2 shows the effect of injection of ⁇ 4 and Gly- ⁇ ⁇ 4 on the degree of fibrosis in rat heart.
  • Figure 3 shows the effect of the use of ⁇ 4 and Gly- ⁇ ⁇ 4 on the healing of rat epidermal wounds in a rat model.
  • Fig. 4 shows the effect of the effects of T P 4 and Gly- ⁇ ⁇ 4 on the degree of corneal epithelial damage in rats in a rat model.
  • Figure 5 shows the effect of injection of ⁇ 4 and Ala- ⁇ 4 on the rat heart wall thickness in a rat model.
  • Figure 6 shows the effect of injection of ⁇ 4 and Ala- ⁇ 4 on the degree of fibrosis in rat heart.
  • Figure 7 is a graph showing the effect of the use of ⁇ ⁇ 4 and Ala- ⁇ ⁇ 4 on the healing time of rat epidermal wounds in a rat model.
  • Figure 8 shows the effect of the use of ⁇ 4 and Ala- ⁇ 4 on the degree of scarring in the epidermal wound of rats in a rat model.
  • Fig. 9 shows the results of corneal epithelial burned by alkali when the ⁇ 4 group (C), Ala -T P 4 group (B) and PBS group (A) were administered on the rabbit corneal alkali burn model.
  • Fig. 10 shows the results of corneal epithelial recovery observed in the rabbit corneal alkali burn model after administration of the ⁇ 4 group (B), the Ala - ⁇ ⁇ 4 group (C), and the PBS group ( ⁇ ) for 5 days.
  • the inventors deposited the recombinant strains PGMT ⁇ 4-A/BL21 and PGMT ⁇ 4-G/BL21 obtained by genetic engineering reorganization on the Chinese microbial strains on July 5, 2006. Management Committee General Microbiology Center (CGMCC, Beijing, Zhongguancun North, ), with accession numbers CGMCC 1750 and CGMCC 1751.
  • CGMCC Management Committee General Microbiology Center
  • the E. coli preference codon is used to synthesize the TP 4 DNA sequence to obtain the Gly-T P 4 nucleic acid sequence.
  • a restriction enzyme cleavage site is added at the N-terminus and the C-terminus corresponding to the polypeptide. BamHI, Xhol, glycine Gly at the N-terminus, as shown in SEQ ID NO: 2.
  • restriction enzyme sites are underlined.
  • the E. coli preference codon gene was used to synthesize the leader peptide DNA sequence and the restriction endonuclease EcoRI, BaraH I was added at the C-terminus.
  • the nucleic acid sequence of the leader peptide is obtained, as shown in SEQ ID NO: 3:
  • BamHI (SEQ ID NO: 3);
  • the leader peptide, Gly- ⁇ prepared as described above, according to methods commonly used in the art, see, for example, Molecular Cloning (Second Edition: Laboratory Guide) (1992, Cold Spring Harbor Laboratory) ⁇ 4 and the screening plasmid pBSK ( Stratagene, Cat. No. 212205) were treated with restriction enzymes EcoRI, Xhol, BamHI, in which EcoRI and BamHI were used to cut the leader peptide, Xhol and BamHI were cut into Gly- ⁇ 4, EcoRI and Xhol were used to screen the plasmid.
  • pBSK after calculating the concentration of each sample, the T4 linkage system was added at a molar ratio of 1:1.
  • a recombinant plasmid containing the above-mentioned Gly-T ⁇ 4 nuclear column and leader peptide fusion protein gene was transformed and selected to be pSK- ⁇ 41.
  • the fusion protein gene was digested with the corresponding restriction endonuclease, and the fusion protein gene fragment was digested with Xhol and EcoR I, and the plasmid pGM (the plasmid was a kanamycin resistance screening marker, A large fragment of the GST-like fusion protein, which was constructed by the company, was constructed.
  • the three-stage gene fragment was ligated in the T4 ligase system at 18 °C.
  • the recombinants were screened and identified by enzyme digestion and sequencing to obtain correctly linked recombinants.
  • Granule named pGMTP4-G.
  • Escherichia coli BL21 was transformed with CaCl 2 method, and plated on an LB plate containing 5 (g/ml kanamycin), positive colonies were selected, and transformants containing the above recombinant plasmid pGMTP4-G were identified.
  • the applicant also obtained a genetically engineered strain which efficiently expressed the thymosin derivative Gly-TP4 protein, and named it PGMTP4-G/BL21 (Accession No.: CGMCC No: 1751).
  • Disodium hydrogen phosphate 315 g
  • potassium dihydrogen phosphate 100 g
  • sodium chloride 10.05 g
  • ammonium chloride 50 g
  • tryptone 90 g.
  • GSH-Agrose chromatography medium (Pharmacia) was used, and the equilibration solution was 25raM Tr is-HCl, pH8. After the sample was equilibrated, the centrifugation supernatant was centrifuged on a Glutathione Sepharose column (Pharmacia), and the balance was 10 mM. The eluate of reduced glutathione (GSH) was washed with the fusion protein.
  • SourceUse Source30Q chromatography (Pharmacia) medium the balance solution is 20raM PB (disodium hydrogen phosphate-sodium dihydrogen phosphate solution), H7, the sample obtained by the step ( 2 ) enzymatic hydrolysis is diluted 1 times with water for loading, balance After elution with a gradient of 20 mM PB, pH 7, 0-1 M NaCl, the elution peak of the target protein was collected. 4). Detection
  • the E. coli preference codon gene was used to synthesize the ⁇ 4 DNA sequence, and the Ala- ⁇ ⁇ 4 nucleic acid sequence was obtained, in order to facilitate the gene recombination operation, and correspondingly
  • the terminal ends and the C-terminus of the polypeptide are added with restriction enzyme sites BamHI, Xhol, and the alanine Ala is modified at the N-terminus, as shown in SEQ ID NO: 4:
  • restriction enzyme sites are underlined.
  • the fusion protein gene was excised by restriction endonuclease, and the fusion protein gene fragment was digested with Xhol and EcoR I and the plasmid PGM (the shield granule was a kanamycin resistance screening marker, which can be expressed in a large amount.
  • the obtained recombinants were screened by restriction enzyme digestion and sequence analysis to obtain a correctly ligated recombinant plasmid, which was named pGMT ⁇ 4- ⁇ .
  • Escherichia coli BL21 was transformed with CaCl 2 method, and plated on an LB plate containing 50 ⁇ ⁇ / ⁇ 1 kanamycin, and positive colonies were selected to identify transformants containing the above recombinant plasmid pGMT ⁇ 4- ⁇ .
  • Tryptone 10 g / liter
  • yeast powder 5 g / liter
  • sodium chloride 10 g / liter
  • kanamycin 50 ⁇ g / liter.
  • Disodium hydrogen phosphate 315 g
  • potassium dihydrogen phosphate 100 g
  • sodium chloride 10.05 g
  • ammonium chloride 50 g
  • tryptone 90 g.
  • the strain was taken from the identified Pingya, inoculated into a 50-liter (250-liter triangular flask) LK at 36 °C, 200 rpm, and transferred to 50 liters of seed solution after 8 hours. 700 liters of LK, 36 ° C, 200 rpm, culture overnight.
  • GSH-Agrose chromatography medium (Pharmacia) was used, and the equilibration solution was loaded with 25 mM Tris-HCl, pH 8. After centrifugation, the supernatant of the bacterium was centrifuged on a Glutathione Sepharose column (Pharmacia), and the mixture was equilibrated with 1 OmM. The eluate of reduced glutathione (GSH) was washed with the fusion protein.
  • the equilibration solution was 20 mM PB, PH7.
  • the sample obtained by the step (2) was diluted and diluted with water for 1 time. After equilibration, 20raM PB, pH7, 0 - 1M NaCl was used. Gradient elution, collecting the peak of the protein of interest.
  • the negative control group (20 mice in each group, 200 ⁇ l/day/day) was injected into the positive control group (20 mice in each group, intraperitoneal injection of natural thymosin ⁇ 4 10 ⁇ ). 8 / a day / day, the test group (20 per group, intraperitoneal injection of thymosin derivative Gly-TP4 10 ⁇ 8 / day / day) was administered.
  • the left ventricular anterior wall thickness of each group of animals was determined by cardiac echocardiography (Live 3D Echo 7500) and probe (probe 15- 16L) on days 14, 28, and 56 after administration.
  • the results were as follows: Base value ( ⁇ 0 days, before administration), negative control group 0.2682 ⁇ 0.01, positive control group 0.2513 ⁇ 0.032, Gly-T ⁇ 4 group 0.2499 ⁇ 0.0225, there was no significant difference between the groups.
  • the negative control group was 0.1365 ⁇ 0.0125
  • the positive control group was 0.1919 ⁇ 0.012.
  • the negative control group (20 mice in each group, 200 ⁇ l/day/day) was injected into the positive control group (20 mice in each group, intraperitoneal injection of natural thymosin ⁇ 4 10 ⁇ ). 8 / a day / day, the test group (20 per group, intraperitoneal injection of thymosin derivative Ala-TP 4 10 ⁇ 8 / day / day) was administered.
  • the left ventricular anterior wall thickness of each group of animals was determined by cardiac echocardiography (Live 3D Echo 7500) and probe (probe 15-16L) on days 14, 28, and 56 after administration. The results were as follows: Base value ( ⁇ 0 days, before administration), negative control group 0.2594 ⁇ 0.0225, positive control group 0.2378 ⁇ 0.018, Ala-T ⁇ 4 group 0.2432 ⁇ 0.01, no significant difference between the groups.
  • the negative control group was 0.1306 ⁇ 0.0128
  • the positive control group was 0.1215 ⁇ 0.013
  • the Ala-TP4 group was 0.1299 ⁇ 0.011. There was no significant difference between the groups.
  • the negative control group was 0.1207 ⁇ 0.0151
  • the positive control group was 0.1233 ⁇ 0.0071
  • the human 1 & -1 ⁇ 4 group was 0.1288 ⁇ 0.012. There was no significant difference between the groups.
  • the negative control group was 0.1265 ⁇ 0.0125
  • the positive control group was 0.1232 ⁇ 0.0057
  • the Ala- ⁇ 4 group was 0.1672 ⁇ 0.0078.
  • the thickness of the left ventricular anterior wall of the Ala-T ⁇ 4 group was increased ( ⁇ 0.05).
  • the negative control group (20 mice in each group, 200 ⁇ l/day/day) was injected into the positive control group (20 mice in each group, intraperitoneal injection of thymosin ⁇ 4 10 ⁇ 8). /only/day), the experimental group (20 in each group, intraperitoneal injection of thymosin Gly- ⁇ 4 10 ⁇ 8 /po / day) was administered.
  • the results are as follows:
  • the heart On the 56th day after the administration, the heart was taken, and the heart was cut, and the heart was cut into sections. After soaking in 1% formalin for 24 hours, the waxy tissue sections and slides were made and stained with Masson' trichrome. The Image-pro® PLUS ver.4.1 (Media Cybernetics) method was used for comparison between groups.
  • the ratio of myocardial fibrosis to total left ventricular myocardium was 30.02 in the negative control group. 5.1%, positive control group 23.15 ⁇ 2.9% (P ⁇ 0.05), Gly-TP4 group 15.36 ⁇ 2.7% ( ⁇ ⁇ 0.0005).
  • the ratio of myocardial fibrosis to the total left ventricular myocardium was 2.1% for the negative control group, 28.13 for the positive control group, 2.3% for the positive control group ( ⁇ ⁇ 0.05), and 1.8% for the Ala-T ⁇ 4 group (1.8% for the Ala-T ⁇ 4 group ( ⁇ ⁇ 0.0005); There was a significant difference between the negative control group and the positive control group and the ⁇ 1 - ⁇ 4 group, especially in the Ala-T ⁇ 4 group. These results indicate that both Ala-T ⁇ 4 and ⁇ 4 are effective in reducing myocardial fibrosis caused by myocardial infarction (see Figure 6).
  • the Ala-TP 4 causes the effect of reducing myocardial fibrosis to be surprisingly much higher than that of ⁇ 4 .
  • rat epidermal injury model In order to evaluate and compare the activity of Gly- ⁇ 4 and ⁇ ⁇ 4 in repairing epidermal tissue damage, a pathological animal model of epidermal injury was established: rat epidermal injury model.
  • the back skin of the rat was cut 3 cm.
  • the test group (20 in each group, thymosin derivative Gly-T ⁇ 4 5 ⁇ ⁇ /50 ⁇ 1/only) was administered by epidermal administration 4 times a day.
  • the negative control group was 2.18 soil 0.18
  • the positive control group was 1.62 ⁇ 0.13
  • the Gly-T ⁇ 4 group was 14.14 ⁇ 0.12.
  • a negative control PBS
  • a positive control ⁇ 4
  • a test substance Ala - ⁇ 4
  • the drug concentration of TP 4 and Ala - ⁇ 4 is 100 g/ml.
  • the wound healing was observed daily after administration.
  • the wound healing time was 7.3 ⁇ 1.02 days in the PBS group, 5.8 ⁇ 0.91 days in the ⁇ 4 group, and 4.7 ⁇ 0.83 days in the Ala - ⁇ ⁇ 4 group.
  • the wound healing time of the ⁇ 4 group and the Ala - ⁇ ⁇ 4 group was significantly shorter than that of the PBS group ( ⁇ 0.05). The results are shown in Fig. 7.
  • the wound healing time of Ala- ⁇ 4 was significantly shorter than that of ⁇ 4: after 2 weeks of administration, the scar size of each group was compared, and the result was: 2.3 ⁇ 0.31 cm in the negative control group, ⁇ ⁇
  • the 4 groups were 1 ⁇ 9 ⁇ 0.23cra, and the Ala - T ⁇ 4 group was 1.7 ⁇ 0. 30cm; and the scars of the ⁇ 4 group and the Ala - ⁇ 4 group were thinner linear scars and the surface was flat, while the negative control The scars were thicker and the surface was uneven.
  • a pathological animal model of acute corneal injury was established: a rat corneal alkali burn model.
  • the negative control group (10 mice in each group, local saline 30 ⁇ 1/only, 4 times/day) was used, and the positive control group (10 in each group) , natural thymosin 30 ⁇ 1/only, 4 times/day), test group (10 mice per group, thymosin Gly- ⁇ 4 30 ⁇ 1/only, 4 times/day) ocular administration.
  • the eyeballs were excavated, 10% formaldehyde was fixed, embedded in paraffin, and serially sliced along the pupil optic nerve plane. The cut slices were collected and analyzed by the image analysis system to analyze the recovery of corneal epithelium. The results are as follows:
  • the negative control group was 4.89 ⁇ 0.12
  • the ⁇ 4 group was 7.03 ⁇ 0.13
  • the Gly-T ⁇ 4 group was 7.62 ⁇ 0.11.
  • a negative control (PBS), a positive control ( ⁇ 4), and a test substance (Ala- ⁇ 4) were administered topically with eye drops, and were dripped 4 times a day.
  • the drug concentration of TP 4, human 1 & 4 was 50 ( ⁇ 8/1111, and corneal epithelial recovery was observed every day after administration.
  • Corneal epithelial recovery Corneal epithelium was observed to be burned down in the ⁇ 4 group, the Ala- ⁇ 4 group, and the PBS group on the first day of administration (see Figures 9A-C;). However, at the end of the fifth day of the PBS group, some corneal epithelial cells had not grown (see Figure 10A); at the end of the fifth day of the ⁇ 4 group, all damaged corneal epithelial cells returned to normal, and 1-2 layers of epithelial cells were observed (see Figure 10B); at the end of the fifth day of the Ala-TP 4 group, all damaged corneal epithelial cells returned to normal, and 3-4 epithelial cells were observed. (See Figure 10C).
  • the recovery of corneal epithelium in the ⁇ 4 group and the Ala -T ⁇ 4 group was significantly better than that in the ⁇ ⁇ 4 group.
  • the results showed that ⁇ 4 and Ala - ⁇ ⁇ 4 had obvious corneal epithelial recovery to promote membrane alkali burn, and the recovery of corneal epithelium of Ala - ⁇ 4 was better than that of TP 4 .

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Description

胸腺素 β 4衍生物及其应用 技术领域
本发明涉及新的胸腺素 |3 4 ( Τ β 4 )衍生物 Gly-T β 4和 Ala-T β 4。 本发明还涉及含有所述 Τ β 4衍生物的药物组合物。 本发明还 涉及所述 Τ β 4衍生物用于制备治疗皮肤组织损伤、 心脏组织损伤、 角膜损伤和 /或冠心病的药物的用途。 本发明还涉及利用所述 Τ β 4 衍生物治疗皮肤组织损伤、 心脏组织损伤、 角膜损伤和 /或冠心病的 疾病的方法。 发明背景
免疫系统是人体的防御系统。参与免疫反应的主要细胞有 Τ淋巴 细胞、 Β淋巴细胞和巨噬细胞。 而胸腺是 Τ淋巴细胞发育、 分化的免 疫中枢器官。 胸腺分泌的胸腺因子(或激素)是 Τ淋巴细胞发育分化 所需的一系列必需物质, 其中 Τ β 4是现已结构和功能较为明确的一 种主要的胸腺因子。 本领域周知, Τ β 4是 Golds tein等人, (THE JOURNAL OF BIOLOGICAL CHEMISTRY, Vol. 257, No. 2, pp. 1000 - 1006, 1982, Chemical Characterizat ion of Thymos in beta)最 早从小牛胸腺中提取的胸腺素组分 5 ( TF5 )中分离出来的一种多肽, 含 43个數基酸, 如 SEQ ID N0: 1所示, 分子量 4. 963KD, 无二硫键与 糖基化。
τ ρ - 是一种胚胎在心脏发病过程中表达的蛋白, 它能促进心 脏细胞的迁移并影响这些细胞的生死存亡 ( Thymos in beta 4 act ivates integrin-1 inked kinase and promotes cardiac cel l migrat ion, survival and cardiac repair. Nature, Vol. 432, 2004 年 11月 25 日)。上述文献研究表明,这种蛋白能够在实臉诱导的心 脏病发作后防止细胞的死亡并限制疤痕组织形成的程度。 Τ β -4已经 9 被用于临床试验, 以促进皮肤创伤的痊愈。 研究人员相信不久的将 来, Τ β -4蛋白将会进入心脏病治疗的临床试验阶段。
正如上述用 Τ β 4的活性所做的一项研究所表明的那样, Τβ 4增 强组织培养物中胚胎及出生后心肌细胞的存活能力, 在大鼠冠状动 脉结扎后腹膜内注射该蛋白, 能成功刺激心脏修复和激活 Akt存活 激酶。 这些结果说明, Τ-β 4对于急性冠状动脉闭塞是一个可能的治 疗目标。
德克萨斯州大学的研究人员在上述文献中还发现一种在心脏发 育过程中制造的蛋白质(即: Τ β - 4 )在心脏病发作后能够帮助心脏 器官的自我修复。 这些在大鼠实验中获得的发现最终可能导致新的 心脏病疗法的出现并且可能改变医护人员对心脏病的处理方式。
本发明人通过对已知 Τ Ρ -4进行蛋白质三级结构分析, 采用基 因工程方法对所述蛋白质的 Ν -末端加以修饰, 出人意料的获得在皮 肤组织损伤修复、心脏组织损伤修复等方面活性明显高于天然 T p -4 的新 Τ β -4衍生物。 发明内容
本发明的一个方面, 涉及一种新 Τ β 4衍生物, 其分别为 SEQ ID NO: 6所示的 Gly-T β 4 , 和 SEQ ID NO: 5所示的 Ala-T β 4。
本领域普通技术人员知晓, 所述 Gly-T β 以及 Ala - Τ β 4可以 通过基因重组表达的方法或者化学合成的方法制备。 在本发明中, 所述 Gly-T β 4以及 Ala- Τ β 4是通过基因工程重组表达的方法获得 的。
在本发明的一个实施方案中, 通过如下方法获得 Ν -末端修饰 的胸腺素 β 4衍生物: Gly-T 0 4或 Ala-T p 4, 包括如下步驟:
1 )表达载体的构建
依据已知 Τ β 4氨基酸序列 ( SEQ ID NO: 1 ), 选用大肠杆菌偏好 密码子全基因合成 Τ β 4 DNA序列, 同时在相应于所编码的氨基酸序 列之 Ν末端和 C末端加上限制性酶切位点,并进行 Ν -末端修饰,得 到编码 Τ β 4衍生物: Gly- Τ β 4或 Ala-T P 4的核酸序列。 依据已知 GST氨基酸序列选用大肠杆菌偏好密码子全基因合成先导肽 DNA序 列且在相应于所编码的氨基酸序列之 N末端和 C末端加上限制性酶 切位点, 得到先导肽核酸序列。
再分别将如上述制备的先导肽序列、 Τ β 4衍生物序列以及筛选 质粒 pBSK用限制性内切酶处理好,经计算各样品浓度后按一定摩尔 比加入 T4连接体系。 经转化、 筛选成功的重组子。
用限制性酶切下融合蛋白基因,再将该基因与用限制性酶处理好 的本公司质粒 pGM (该质粒为卡那霉素抗性筛选标记, 能大量表达 GST类融合蛋白, 为^司构建)连接, 经筛选得到正确地重組子。
2 )重组 Τ β 4衍生物的表达及分离純化
将如上述所得重组子转化到表达宿主菌,经表达筛选出高表达基 因工程菌, 然后经发酵, 得到目的蛋白高表达的工程菌。 高压均质 机破碎细菌并离心得到含目的前体蛋白上清液,将上清液上样到 GST 亲和柱上, 洗脱目的前体蛋白并用凝血酶酶切后, 再将样品通过阴 离子柱进一步纯化, 使得最终蛋白纯度大于 98 %的终产物。
本发明的另一方面, 涉及一种药物组合物,其含有本发明所述的 Τ β 4衍生物: Gly- Τ β 4和 /或 Ala- Τ β 4, 以及任选的药物上可接受 的载体。
在本发明知, 术语 "药物上可接受的" 意味着制药领域公认的 可用于动物, 更特别的是可用于人的。 术语 "载体" 指稀释剂、 佐 剂(例如(完全或不完全)弗氏佐剂)、 赋形剂、 或用于容纳或施用 治疗剂的介盾。
这些药用载体可以是无菌液体, 诸如水和油, 包括源自石油、 动物、 植物、 或合成的油, 诸如花生油、 大豆油、 矿物油、 芝麻油、 诸如此类。 静脉内施用药用组合物时, 7j是优选的载体。 盐水溶液 以及水性右旋糖和甘油溶液也可用作液态载体, 特别是用于可注射 溶液。 合适的药用赋形剂包括淀粉、 葡萄糖、 乳糖、 蔗糖、 明胶、 麦芽、 大米、 面粉、 白垩、 硅胶、 硬脂酸钠、 单硬脂酸甘油、 滑石、 氯化钠、 奶粉、 甘油、 丙烯、 乙二醇、 水、 乙醇、 诸如此类。 如果 需要, 组合物还可以包含较少数量的润湿或乳化剂如透明质酸钠, 或是 pH緩沖剂。这些组合物可以采取溶液、 悬浮液、乳状液、 片剂、 丸剂、 胶嚢粉剂、 緩释配方、 诸如此类的形式。
在本发明的一个实施方案中, 所述药物组合物为冻干注射剂形 式, 其中含有 0. 01%-0. 2%的胸腺素衍生物 Gly-T β 4或 Ala-T β 4, 以及 5%的甘露醇, 以及药物上可接受的载体。
将本发明的药用组合物配制成与其意向施用路径相容。施用路 径的实例包括但不限于肠胃外, 例如静脉内、 皮内、 皮下、 口腔、 鼻内 (例如吸入)、 经皮(例如局部)、 经粘膜、 和直肠施用。 在一 个具体实施方案中, 依照常规流程将组合物配制成适合静脉内、 皮 下、 肌肉内、 口腔、 鼻内、 或局部施用于人类的药用组合物。 通常, 用于静脉内施用的组合物是无菌等渗水性緩沖液中的溶液。 如果需 要, 组合物还可以包含增溶剂和局部麻醉剂诸如麦角胺以减轻注射 部位的疼痛。
本发明的一个实施方案中, 所述组合物为滴眼液, 其中含有 50-50(^g/ml的胸腺素衍生物 Gly-T β 4和 /或 Ala- Τ β 4, 以及选自 氯霉素或氧氟沙星的抗生素, 以及药物上可接受的载体; 在本发明 的又一实施方案中, 所述组合物为滴眼液, 其中含有 50-50(^g/ml 的胸腺素衍生物 Gly- Τ β 4和 /或 Ala-T p 4,适量的透明质酸钠, 以 及药物上可接受的载体; 在本发明的另一实施方案中, 所述组合物 为滴眼液,其中含有 50- 50(^g/ml的胸腺素衍生物 Gly- Τ β 4和 /或 Ala- Τ β 4,适量的透明质酸钠,氯霉素或氧氟沙星, 以及药物上可接 受的载体。
若要局部施用本发明的組合物, 则可以将组合物配制成软膏、 乳骨、 皮肤贴、 洗剂、 凝胶、 洗发剂、 喷雾剂、 气雾剂、 溶液、 乳 液的形式或是本领域技术人员众所周知的其它形式。 参阅例如《雷 明顿氏药物科学和药物剂型导论》(Remington' s Pharmaceut ical Sciences and Introduct ion to Pharmaceut ical Dosage Forms ), 第 19版, Mack出版公司, 伊斯顿, 宾夕法尼亚, 1995年。
对于非可喷雾局部剂量形式, 通常采用包含与局部应用相容的 载体或一种或多种赋形剂且具有优选大于水的动态粘滞度的粘性至 半固体或固体形式。 合适的配方包括但不限于溶液、 悬浮液、 乳状 液、 乳骨、 软骨、 粉剂、 搽剂、 药骨、 诸如此类, 如果需要, 是无 菌的或与辅助试剂 (例如防腐剂、 稳定剂、 润湿剂緩冲剂、 或盐) 混和以改变各种特性, 诸如例如渗透压。 其它合适的局部剂量形式 包括可喷雾气雾剂制剂, 其中优选联合固相或液相惰性载体的活性 成分包装在含有增压挥发物 (例如压缩气体, 诸如氟利昂) 的混合 物或是挤瓶中。 如果需要, 还可以向药物组合物和剂量形式中添加 增湿剂或湿润剂。 这些额外成分的实例在本领域是众所周知的。
在本发明的又一实施方案中, 所述药物組合物为软骨形式, 其 中含有 0. 01°/。- 0. 2%的胸腺素衍生物 Gly-T β 4或 Ala- Τ β 4, 和药物 上可接受的赋形剂如凡士林。
若本发明的方法包括组合物的鼻内施用, 则组合物可以配制成 气雾剂、 喷雾剂、 轻雾剂、 或滴剂的形式。 具体而言, 依照本发明 使用的预防性或治疗性试剂可以使用合适的推进剂 (例如二氯二氟 甲烷、 三氯单氟甲烷、 二氯四氟乙烷、 二氧化碳、 或其它合适其它) 以气雾剂喷雾呈现的形式由增压包装或喷雾器进行方便的投递。 在 增压气雾剂的情况中, 可以通过提供阀门来确定剂量单位, 以投递 计量数量。 吸入器或吹入器中所使用的胶袭和药筒 (由例如明胶构 成)可以配制成含有化合物及合适粉末基质诸如乳糖或淀粉的粉末 混合物。
在本发明的又一实施方案中, 所述药物组合物为喷剂, 其中含 有 5-50(^g/ml的胸腺素衍生物 Gly- Τ β 4或 Ala- Τ β 4 ,以及 0· 003% 的尼泊金乙酯, 和药物上可接受的载体。
若本发明的方法包括口服施用, 则组合物可以配制成片剂、 胶 嚢、 药包、 软胶嚢、 溶液、 悬浮液、 诸如此类的形式。 可以通过常 规手段用药用可接受赋形剂诸如粘合剂 (例如预胶凝玉米淀粉、 聚 乙烯吡略烷酮、或羟丙基曱基纤维素); 填料(例如乳糖、微晶纤维 素、 或磷酸氢钩); 润滑剂 (例如硬脂酸镁、 滑石、 或硅石); 分解 质(例如马铃薯淀粉或淀粉乙醇酸钠); 或润湿剂(例如月桂醇硫酸 钠) 片剂或胶嚢。 可以通过本领域众所周知的方法包被片剂。 用于 口腔施用的液体制剂可以采取但不限于溶液、 糖浆、 或悬浮液的形 式, 或者它们可以以干燥产品的形式存在, 使用前用水或其它合适 介盾溶解。可以通过常规手段用药用可接受添加剂,诸如悬浮剂(例 如山梨醇糖浆、 纤维素衍生物、 或氢化食用脂肪); 乳化剂(例如卵 磷脂或阿拉伯树胶); 非水性介质(例如杏仁油、 油性酯、 乙醇、 或 分馏植物油); 以及防腐剂(例如甲基或丙基 -对-羟基苯甲酸酯或山 梨酸)制备这些液体制剂。 制剂还可以适当包含緩沖盐、 芳香剂、 着色剂、 和甜味剂。 可以适当配制用于口腔施用的制剂以緩慢幹放、 受控释放、 或持续幹放预防性或治疗性试剂。
本发明的方法还包括配制用于通过注射(例如通过推注或连续 输液)肠胃外施用的组合物的施用。 用于注射的配方可以以含有额 外防腐剂的单位剂量形式(例如在安瓿中或在多剂量容器中)存在。 组合物可以采取诸如油性或水性介盾中的悬浮液、 溶液、 或乳状液 等形式, 而且可以含有配制剂,诸如悬浮剂、稳定剂、和 /或分散剂。 或者, 活性成分可以是粉末形式, 在使用前用合适介质(例如无菌、 无热原水)溶解。
可用于提供本发明肠胃外剂量形式的合适介质对于本领域技术 人员而言是众所周知的。 在某些实施方案中, 适于肠胃外剂量形式 的介质包括但不限于注射用水 USP;水性介质包括但不限于氯化钠注 射液、 Ringer氏注射液、 葡萄糖注射液、 葡萄糖和氯化钠注射液、 以及乳酸化 Ringer氏注射液; 水易混介质包括但不限于乙醇、 聚乙 二醇、 和聚丙二醇; 以及非水性介质包括但不限于玉米油、 棉籽油、 花生油、 芝麻油、 油酸乙酯、 肉豆蔻酸异丙酯、 和苯甲酸苯甲酯。
本发明的再一方面, 涉及选自 Gly-T P 4 和 Ala- Τ β 4之 Τ β 4 Ν 末端修饰衍生物用于制备治疗心脏組织损伤、 皮肤组织损伤、 角膜 损伤和 /或冠心病的药物的用途。
本发明人出人意料的发现,在通过模式动物实验研究对受损心脏 组织修复、 皮肤組织损伤修复、 角膜损伤修复的活性方面, 本发明 的 Gly-T β 4均具有明显高于天然 Τ β 4的活性。
本发明人首先研究了 Gly- Τ β 4和 Ala-T β 4对心脏组织修复的作 用。 研究人员将 60只成年大鼠的冠状动脉结扎模拟心脏病发作, 从 而得到大鼠冠状动脉左前降支结扎再灌流模型。 连续注射胸腺素衍 生物 Gly-T β 4、 Α1 -Τ β 4或胸腺素 Τ β 4—月的大鼠受损心脏中, 细胞很少死亡, 并在心脏病发后数周改善了心脏功能, 而且 Gly-T β 4或 Ala- Τ β 4的治疗效果比 Τ β 明显。本发明人发现胸腺素衍生 物 Gly- Τ β 4或 Ala- Τ β 4均能够改变细胞的代谢并创造出更强大的 心肌细胞, 这些细胞能够抵抗心脏病发后的低氧状况。
本发明人还研究了 Gly-T β 4和 Ala- Τ β 4对受损表皮组织的作 用。 研究人员将 30只成年大鼠的表皮划伤, 从而得到大鼠表皮损伤 模型。 连续涂抹胸腺素 Gly- Τ 4、 Ala- Τ β 4或 Τ β 4 5天的大鼠的 伤口长度比空白对照小 50%,而且 Gly- Τ β 4或 Ala- Τ β 4的治疗效果 比 Τ β 4明显。 本发明人还研究了 Gly-T P 4对受损角膜组织的作用, 研究人员 将 30只成年大鼠的角膜用 1N烧碱烧伤, 从而得到大鼠角膜损伤模 型。 连续眼部滴胸腺素 Gly- Τ β 4或 Τ β 4 4天的大鼠的受损角膜完 全恢复, 而用生理盐水组的动物角膜不但没恢复, 还出现了严重的 炎症和充血。
上述结果表明 ,本发明的 Τ β 4衍生物 Gly-T β 4和 /或 Ala- Τ β 4 在治疗心脏组织损伤、 表皮组织损伤以及角膜组织损伤等方面具有 明显高于天然 Τ β 4的活性。
本发明的又一方面涉及利用所述 Τ β 4衍生物 Gly- Τ β 4和 /或 Ala- Τ β 4治疗受试对象特别是人的心脏组织损伤、 表皮组织损伤以 及角膜组织损伤的方法。 自本发明的一个实施方案中, 所述治疗心 脏组织损伤、 表皮组织损伤以及角膜組织损伤的方法包括向所述受 试对象施用治疗有效量的本发明所述 Τ β 4衍生物 Gly-T β 4和 /或 Ala-T p 4。
本领域普通技术人员知晓, 施用的方式、 频率和剂量将根据所 治疗的病症、 病况和个体的不同而异。 一般来说, 可以通过注射(例 如皮内、 肌内、 静脉内或皮下)、 局部施用(例如表皮施用)或滴加施 用 (例如滴眼剂)等方式施用。 也可以根据患者个体的不同选择合 理的施用途径和施用方案。 合适的剂量为当施用上述的药物组合物 后能够有效治疗心脏组织损伤、 表皮组织损伤以及角膜组织损伤的 的量。
一般来说, 对于含有本发明所述 Τ β 4衍生物 Gly-T β 4和 /或 Ala-T β 4 的药物组合物, 存在于每一个剂量中的量大约为 lOO g- 5mg。合适的剂量的多少将因患者病症以及给药方式而异,但 一般从大约 0. 1ml- 5ml。 附图说明 图 1是对大鼠模型注射 Τ β 4和 Gly- Τ β 4后对大鼠心脏壁厚度 的影响结果。
图 2是对大鼠模型注射 Τ β 4和 Gly- Τ β 4后对大鼠心脏壁纤维 化程度的影响结果。
图 3是对大鼠模型使用 Τ β 4和 Gly- Τ β 4后对大鼠表皮伤口愈 合程度的影响结果。
图 4是对大鼠模型使用 T P 4和 Gly- Τ β 4后对大鼠的损伤角膜 表皮形成程度的影响结果。
图 5是对大鼠模型注射 Τ β 4和 Ala- Τ β 4后对大鼠心脏壁厚度 的影响结果。
图 6是对大鼠模型注射 Τ β 4和 Ala- Τ β 4后对大鼠心脏壁纤维 化程度的影响结果。
图 7是对大鼠模型使用 Τ Ρ 4和 Ala- Τ β 4后对大鼠表皮伤口愈 合时间的影响结果。
图 8是对大鼠模型使用 Τ β 4和 Ala- Τ β 4后对大鼠表皮伤口瘢 痕程度的影响结果。
图 9是对家兔角膜碱烧伤模型中施用 Τ β 4组(C )、 Ala -T P 4 组( B )和 PBS组( A )第 1天时, 观察到角膜上皮被碱烧毁的结果。
图 10是对家兔角膜碱烧伤模型中施用 Τ β 4组(B )、 Ala -Τ β 4组(C )和 PBS组(Α )后笫 5天时, 观察到角膜上皮恢复的结果。 依照用于专利程序的布达佩斯条约,发明人于 2006年 7月 5日 分别将通过基因工程重组获得的重组菌株 PGMT β 4-A/BL21和 PGMT β 4-G/BL21保藏于中国微生物菌种保藏管理委员会普通微生物中心 ( CGMCC,北京, 中关村北一条, ) ,保藏号为 CGMCC 1750 和 CGMCC 1751。 以下结合附图和实施例对本发明进一步示例性说明,但不构成对 本发明产生任何限制。 实施例 1. 胸腺素 P 4衍生物 Gly- T P 4的制备
1. 重组质粒 pGMT 4-G的制备
依据已知 Τ β 4氨基酸序列 (SEQ ID NO: 1 ), 如下:
Ser Asp Lys Pro Asp Met Ala Glu l ie Glu Lys Phe Asp Lys Ser Lys Leu Lys Lys Thr Glu Thr Gin Glu Lys Asn Pro Leu Pro Ser Lys Glu Thr l ie Glu Gin Glu Lys Gin Ala Gly Glu Ser
( SEQ ID NO: 1 );
选用大肠杆菌偏好密码子全基因合成 T P 4 DNA序列,得到 Gly-T P 4 核酸序列, 为方便基因重组操作, 同时在相应于所述多肽之 N 末端和 C末端加上限制性酶切位点 BamHI、 Xhol ,在 N末端修饰上甘 氨酸 Gly, 如 SEQ ID NO: 2所示。
GGA TCC GAC AAA CCC GAT ATG GCT GAG ATC GAG AAA TTC GAT AAG TCG
BaraH I
AAA CTG AAG AAG ACA GAG ACG CAA GAG AAA AAT CCA CTG CCT TCC AAA GAA ACG ATT GAA CAG GAG AAG CAA GCA GGC GAA TCG TAA CTC GAG
Xhol ( SEQ ID NO: 2 );
其中限制性酶切位点用下划线标明。
其所对应的氨基酸序列如下:
Gly Ser Asp Lys Pro Asp Met Ala Glu l ie Glu Lys Phe Asp Lys Ser Lys Leu Lys Lys Thr Glu Thr Gin Glu Lys Asn Pro Leu Pro Ser Lys Glu Thr l ie Glu Gin Glu Lys Gin Ala Gly Glu Ser
( SEQ ID NO: 6 );
依据已知 GST氨基酸序列选用大肠杆菌偏好密码子全基因合成 先导肽 DNA序列且在^ C末端加上限制性酶切位点 EcoRI、 BaraH I , 得到先导肽的核酸序列, 如 SEQ ID NO: 3所示:
GAATTCATGTCCCCTATACTAGGTTATTGGAAAATTAAGGGCCTTGTGCAACCCA
EcoRI
Figure imgf000012_0001
ACACAGTCTATGGCCATCATACGTTATATAGCTGACAAGCACAACATGTTGGGTGGTTGTCCAAAAGAGCGTG
Figure imgf000012_0002
ACAAATTGATAAGTACTTGAAATCCAGCAAGTATATAGCATGGCCTTTGCAGGGCTGGCAAGCCACGTTTGGT GGTGGCGACCATCCTCCAAAATCGGATCTGGTTCCGCGTGGATCC
BamHI ( SEQ ID NO: 3 ); 按照本领域常用方法, 参见如《分子克隆(第二版): 实验室指 南》( 1992, 冷泉港实验室), 将如上述制备的先导肽、 Gly- Τ β 4以 及筛选质粒 pBSK ( Stratagene公司 , 货号 212205 )用限制性内切酶 EcoRI , Xhol , BamHI处理, 其中 EcoRI和 BamHI切先导肽, Xhol和 BamHI切 Gly- Τ β 4, EcoRI和 Xhol切筛选质粒 pBSK, 经计算各样品 浓度后, 按摩尔比 1: 1加入 T4连接体系。 经转化、 筛选出得到包 含上述 Gly-T β 4核^^列和先导肽融合蛋白基因的重组质粒,命为 pSK- Τ β 41。
分别用相应的限制性内切酶切下所述融合蛋白基因,再将该融合 蛋白基因片段与经 Xhol和 EcoR I欢酶切后质粒 pGM (该质粒为卡那 霉素抗性筛选标记, 能大量表达 GST类融合蛋白, 为本公司构建) 的回收大片段, 18 °C在 T4连接酶体系中三段目的基因片段进行连接。 经酶切和序列测定对所得重组子筛选鉴别, 得到正确连接的重组质 粒, 命名为 pGMTP4-G。
2. 含有重组质粒 pGMT04-G的基因工程菌的制备
然后用 CaCl2法转化大肠杆菌 BL21,涂布在含有 5(^g/ml卡那霉 素的 LB平板, 挑选阳性菌落, 鉴别含有上述重组质粒 pGMTP4-G的 转化子。
在 LK液体培养基中培养所述转化子至 OD600为 0.6-0.8时, 加 入 IPTG 0. ImM诱导 3-4 小时离心收集菌体, 8M尿素破菌后 15% SDS- PAGE电泳时出现一条 30KD左右的蛋白带, 表达量为 40%。 经 T β 4的单克隆抗体免疫印迹检定,显示阳性反应。获得高效表达胸腺 素衍生物 Gly-TP4蛋白的基因工程菌, 命名为 PGM2Tp4/BL21。
按照上述制备方法, 申请人还获得了高效表达胸腺素衍生物 Gly-TP4 蛋白的基因工程菌, 命名为 PGMTP4-G/BL21 (保藏号: CGMCC No: 1751)。
3. Gly-TP4的表达及纯化
1 )摇瓶表达:将如上述制备的含 Gly-T β 4蛋白基因的基因工程 菌 PGMT β 4-G/BL21, 在含 50 μ g/ml卡那霉素的 LB培养基中摇瓶过 夜培养(37°C, 200rpm), 再按体积比 1: 30接种至含有 50 μ g/ml 卡那霉素的 LB培养基中, 37Ό培养 3小时后, 加入 0. ImM IPTG诱 导 4小时。收集菌体经 SDS- PAGE电泳分析,发现含胸腺素衍生物 Gly- Τ(34 (30KD)以可溶性表达为主, 表达量占菌体总蛋白的 60%。
2 ) 大规模发酵表达:
a.培养基组成:
a)种子液培养基 (LK ):
胰蛋白胨: 10克 /升、 酵母粉: 5克 /升、 氯化钠 : 10克 /升、 卡那霉素: 50微克 /毫升。 b)种养基(15升):
磷酸氢二钠: 315克、 磷酸二氢钾: 100克、 氯化钠: 10. 05克、 氯化铵: 50克、 胰蛋白胨: 90克。
以上成分一起在罐中灭菌; 下面的成分单独灭菌后加入发酵罐。 硫酸镁: 15克、 葡萄糖: 450克、 补料( 500克 /升): 葡萄糖。 b.发酵及诱导表达:
i)种子培养:
从已鉴定的平皿上划取菌种, 接种到 50毫升( 250亳升的三角 瓶) LK中, 36 、 200转 /分、 8小时后将这 50亳升种子液转接到 700亳升 LK中, 36 °C、 200转 /分, 培养过夜。
i i)发酵及诱导表达过程:
将培养好的种子液(OD600=3-4 )加入罐中, 调好各参数, 36° (:、 150转、 溶氧 100%, 开始发酵; 5小时后开始以 2. 5速流加 2小时, 约加入 800亳升补料, 加入 1克 IPTG诱导(三小时)。
3) .层析:
(i)亲和层析
采用 GSH-Agrose层析介质(Pharmacia公司), 平衡液采用 25raM Tr is-HCl , pH8 , 上样平衡后, 裂菌的离心上清上 Glutathione Sepharose层析柱(Pharmacia公司),平衡后用含 10mM还原型谷胱 甘肽(GSH ) 的洗脱液洗下融合蛋白。
(i i)酶解
上一步的洗脱液加入凝血酶(5 NIHU/mL ) 37Ό酶切 2小时。 ( i)阴离子交换层析
釆用 Source30Q层析(Pharmacia公司)介质,平衡液为 20raM PB (磷酸氢二钠 -磷酸二氢钠溶液), H7, 将步骤 ( 2 )酶解得到的样 品用水稀释 1倍进行上样, 平衡后采用 20mM PB, pH7, 0-1M NaCl 的梯度洗脱, 收集目的蛋白洗脱峰。 4) .检测
将经过上述纯化步綠得到的 Gly- Τ β 4通过 SDS-PAGE纯度检测和 反相 HPLC检测, 纯度大于 98 %。 实施例 2 胸腺素 Ρ 4衍生物 Ala- Τ β 4的制备
1. 重组质粒 pGMT p 4- Α的制备
依据已知 Τ β 4氨基酸序列 ( SEQ ID NO: 1 ), 选用大肠杆菌偏好 密码子全基因合成 Τ β 4 DNA序列, 得到 Ala- Τ β 4核酸序列, 为方 便基因重组操作, 同时在相应于所述多肽之 Ν末端和 C末端加上限 制性酶切位点 BamHI、 Xhol ,在 N末端修饰上丙氨酸 Ala,如 SEQ ID NO: 4所示:
GGA TCC CCT CGA GCT TCT GAC AAA CCC GAT ATG GCT GAG ATC GAG AAA
BamH I
TTC GAT AAG TCG AAA CTG AAG AAG ACA GAG ACG CAA GAG AAA AAT CCA CTG CCT TCC AAA GAA ACG ATT GAA CAG GAG AAG CAA GCA GGC GAA TCG TAA CTC GAG
Xhol
( SEQ ID NO: 4 );
其中限制性酶切位点用下划线标明。
其所对应当氨基^^列如下:
Ala Ser Asp Lys Pro Asp Met Ala Glu l ie Glu Lys Phe Asp Lys Ser Lys Leu Lys Lys Thr Glu Thr Gin Glu Lys Asn Pro Leu Pro Ser Lys Glu Thr l ie Glu Gin Glu Lys Gin Ala Gly Glu Ser
( SEQ ID NO: 5 ); 依据已知 GST氨基酸序列选用大肠杆菌偏好密码子全基因合成 先导肽 DNA序列且在在相应于所述多肽之 N末端和 C末端加上限制 性酶切位点 EcoRI、 BamH I , 得到先导肽核酸序列(如 SEQ ID NO: 3 所示)
按照本领域常用方法, 参见如《分子克隆(笫二版): 实验室指 南》( 1992,冷泉港实验室),将如上述制备的先导肽核酸序列、 Ala-T β 4核酸序列以及筛选质粒 pBSK用限制性内切酶 EcoR I、 Xho I、 BamH I 处理, 其中 EcoRI和 BamHI切先导肽, Xhol和 BamHI切 Ala- Τ β 4, EcoRI和 Xhol切筛选质粒 pBSK,经计算各样品浓度后,按摩尔比 1: 1加入 T4连接体系。经转化、筛选出得到包含上述 Ala-T β 4核 列和先导肽融合蛋白基因的重组质粒, 命为 pSK- T p 42。
用限制性内切酶切下所述融合蛋白基因,再将该融合蛋白基因片 段与经 Xhol和 EcoR I双酶切后质粒 PGM (该盾粒为卡那霉素抗性筛 选标记, 能大量表达 GST类融合蛋白, 为本公司构建) 的回收大片 段, 18°C在 T4连接酶体系中三段目的基因片断进行连接。 经酶切和 序列测定对所得重组子筛选鉴别, 得到正确连接的重组质粒, 命名 为 pGMT β 4-Α。
2. 含有所述重组质粒的基因工程菌的制备
然后用 CaCl2法转化大肠杆菌 BL21 ,涂布在含有 50μδ/ιη1卡那霉 素的 LB平板, 挑选阳性菌落, 鉴别含有上述重组质粒 pGMT β 4-Α的 转化子。
在 LK液体培养基中培养所述转化子至 OD600为 0. 6-0. 8时, 加 入 IPTG 0. lrnM诱导 3-4 小时离心收集菌体, 8M尿素破菌后 15% SDS- PAGE电泳时出现一条 30KD左右的蛋白带, 表达量为 40%。 经胸 腺素 β 4的单克隆抗体免疫印迹检定,显示阳性反应。获得高效表达 胸腺素衍生物 Ala-T β 4蛋白的基因工程菌, 命名为 PGMTp4/BL21 按照上述制备方法, 申请人还获得了高效表达胸腺素衍生物 Gly-T P 4 蛋白的基因工程菌, 命名为 PGMT β 4-A/BL21 (保藏号: CGMCC No: 1750 )。 3. Α1&-Τ β 4的表达及纯化
1 )摇瓶表达:将如上述制备的含 Ala- Τ β 4蛋白基因的基因工程 菌 pGMT β 4-A/BL21 , 在含 50 μ g/ml卡那霉素的 LB培养基中摇瓶过 夜培养(37°C, 200rpm ), 再按 1 : 30接种含有 50 μ g/ml卡那霉素 的 LB培养基中, 37 °C培养 3小时后, 加入 0. ImM IPTG倚导 4小时。 收集菌体经 SDS- PAGE 电泳分析, 发现含胸腺素衍生物 Ala- Τ β 4 (30KD)以可溶性表达为主, 表达量占菌体总蛋白的 60%。
2 ) 大规模发酵表达:
a.培养基组成:
a)种子液培养基 ( LK ):
胰蛋白胨: 10克 /升、 酵母粉: 5克 /升、 氯化钠 : 10克 /升、 卡那霉素: 50微克 /亳升。
b)种养基(15升):
磷酸氢二钠: 315克、 磷酸二氢钾: 100克、 氯化钠: 10. 05克、 氯化铵: 50克、 胰蛋白胨: 90克。
以上成分一起在罐中灭菌; 下面的成分单独灭菌后加入发酵罐。 硫酸镁: 15克、 葡萄糖: 450克、 补料( 500克 /升): 葡萄糖。 c发酵及诱导表达:
i )种子培养:
从已鉴定的平亚上划取菌种, 接种到 50亳升( 250亳升的三角 瓶) LK中 36 °C、 200转 /分培养, 8小时后将这 50亳升种子液转接 到 700亳升 LK中, 36 °C、 200转 /分, 培养过夜。
i i)发酵及诱导表达过程:
将培养好的种子液(OD600=3-4 )加入罐中, 调好各参数, 36 °C、 150转、 溶氧 100%, 开始发酵; 5小时后开始以 2. 5速流加 2小时, 约加入 800亳升补料, 加入 1克 IPTG诱导(三小时)。 3)层析:
(i)亲和层析
采用 GSH-Agrose层析介质(Pharmacia公司), 平衡液采用 25mM Tris-HCl , pH8 , 上样平衡后, 裂菌的离心上清上 Glutathione Sepharose层析柱(Pharmacia公司),平衡后用含 l OmM还原型谷胱 甘肽(GSH ) 的洗脱液洗下融合蛋白。
(i i)酶解
上一步的洗脱液加入凝血酶(5 NIHU/raL ) 37°C酶切 2小时。 (i i i)阴离子交换层析
采用 Sour ce 30Q层析(Pharmacia公司)介质,平衡液为 20mM PB, PH7, 将步骤(2 )酶解得到的样品用水稀释 1倍进行上样, 平衡后 采用 20raM PB, pH7, 0 - 1M NaCl的梯度洗脱, 收集目的蛋白洗脱峰。
4)检测
得到的 Ala- Τ β 4通过 SDS- PAGE纯度检测和反相 HPLC检测, 纯 度大于 98 %。 实施例 3 胸腺素 β 4衍生物 Gly- Τ β 4和 Ala- Τ β 4与天然胸腺素 Τ β 4对大鼠心脏缺血模型的治疗效果评价
1. 病态动物模型的制作与试验方法
为了评价和比较 Gly- Τ β 4与 Τ β 4减少心脏组织损伤和减少心肌 纤维化的生物学活性,建立了急性心肌梗塞的病态动物模型 -一大鼠 冠状动脉左前降支再灌流模型。
肌肉注射曱苯噻嗪 5mg/kg; 氯胺酮 50mg/kg麻醉, 用碘酒、 酒 精消毒大鼠前胸壁; 完全干燥后铺无菌手术巾, 暴露手术部位, 在 完全无菌状态下进行手术。 切开大鼠前胸壁皮肤, 切断第 3到第 6 肋骨, 露出胸腔, 将肺推向一侧, 打开心囊, 露出心脏。 从冠状动 脉左前降支起点到 3腿处, 用 6-0聚丙烯结扎丝与 NELATON结扎血 管, 1小时后再灌注。 确认无出血后, 将切断的肋骨与胸骨缝合, 再 缝合皮肤。手术后肌肉注射庆大霉素 3mg/kg/天,共 3天,防止感染。
2. 利用超声心动图比较左心室前壁厚度
1) Gly-TP4与 Τβ4的比较
依步骤 1)建立大鼠心脏缺血模型后, 分别向阴性对照组(每 组 20只, 注射生理盐水 200μ1/只 /天), 阳性对照组(每组 20只, 腹腔注射天然胸腺素 Τβ4 10μ8/只 /天), 试验组(每组 20只, 腹 腔注射胸腺素衍生物 Gly-TP4 10μ8/只 /天)给药。
给药后第 14、28、56天利用心脏超声心动图(Live 3D Echo 7500 ) 与探针(probe 15- 16L),测定各组动物左心室前壁厚度。结果如下: 基础值(笫 0天, 给药前), 阴性对照组 0.2682 ±0.01, 阳性对 照组 0.2513 ± 0.032, Gly-T β 4组 0.2499 ± 0.0225, 各组之间无显 著性差异。 给药 14 天, 阴性对照组 0.1365 ±0.0125, 阳性对照组 0.1919士 0.012,与阴性对照组相比,有显著性差异( ρ=0.048<0.05 )。
Gly-T β 4 组 0.2162 ± 0.0078, 与阴性对照组相比, 有显著性差异 (ρ=0.003<0.05)。 与阳性对照组相比, 有差异(ρ=0.086<0.1)。
这些结果显示, Gly-T β 4与 Τ β 4均能有效恢复心肌梗塞引起的 左心室壁厚度的减少(见图 1)。其中,所述 Gly-T β 4引起心脏左心 室前壁厚度增加的效果出人意料的大大高于 Τ β 4的效果。
2) Α1&-Τβ4与 Τβ4的比较
依步骤 1)建立大鼠心脏缺血模型后, 分别向阴性对照组(每 组 20只, 注射生理盐水 200μ1/只 /天), 阳性对照组(每组 20只, 腹腔注射天然胸腺素 Τβ4 10μ8/只 /天), 试验组(每组 20只, 腹 腔注射胸腺素衍生物 Ala- TP 4 10μ8/只 /天)给药。 给药后第 14、 28、 56天利用心脏超声心动图( Live 3D Echo 7500 ) 与探针(probe 15-16L),测定各组动物左心室前壁厚度。结果如下: 基础值(笫 0天, 给药前), 阴性对照组 0.2594 ± 0.0225, 阳 性对照组 0.2378 ±0.018, Ala-T β 4组 0.2432 ± 0.01, 各组之间无 显箸性差异。
给药第 14天阴性对照组 0.1306 ± 0.0128, 阳性对照組 0.1215 ±0.013, Ala-TP4组 0.1299 ±0.011, 各组之间无显著性差异。
给药第 28天,阴性对照组 0.1207 ± 0.0151, 阳性对照组 0.1233 ± 0.0071, 人1&-1^4组0.1288 ±0.012, 各组之间无显著性差异。
给药 56天, 阴性对照组 0.1265 ±0.0125, 阳性对照组 0.1232 ± 0.0057, Ala-Τβ 4组 0.1672 ± 0.0078, Ala-T β 4组心脏左心室 前壁厚度增加 (ρ<0.05)。
这些结果显示, Ala- Τβ4 能有效恢复心肌梗塞引起的左心室壁 厚度的减少(见图 5)。其中,所述 Ala-T β 4引起心脏左心室前壁厚 度增加的效果出人意料的大大高于 Τ β 4的效果。
3。 利用组织学图片比较心室纤维化程度
依步骤 1)建立大鼠心脏缺血模型后, 分别向阴性对照组(每 组 20只, 注射生理盐水 200μ1/只 /天), 阳性对照组(每组 20只, 腹腔注射胸腺素 Τβ4 10μ8/只 /天), 试验组(每组 20只, 腹腔注 射胸腺素 Gly- Τβ4 10μ8/只 /天)给药。 结果如下:
在给药后第 56天, 取心脏, 以乳头状肌肉为准, 横切心脏, 做 成切片。 用 1%福尔马林浸泡 24小时, 制造石腊组织切片及玻片, 进 Mas son' trichrom染色。 各组之间比较采用了 Image- pro® PLUS ver.4.1 (Media Cybernetics)方法。
1) Gly-TP4与 Τβ4的比较
心肌纤维化部分占全左心室心肌的比率为, 阴性对照组 30.02士 5.1%, 阳性对照組 23.15 ±2.9% ( P<0.05 ), Gly-TP4组 15.36 ±2·7%( Ρ< 0.0005)。
由上述结果显示, 阴性对照组与阳性对照组、 Gly- Τβ4 组之间 有显著性差异, 尤其 Gly- Τβ4组有非常显箸性差异。 所述结果表明 Gly-TP4和 Τβ4 均能有效减少心肌梗塞引起的心肌纤维化(见图 2)。其中,所述 Gly-T 4引起所述心肌纤维化的减少效果出人意料 的大大高于 TP 4的效果。
2) Ala-TP4与 Τβ4的比较
心肌纤维化部分占全左心室心肌的比率为, 阴性对照组 28.13土 2.1%, 阳性对照组 22.91土 2.3% (Ρ < 0.05) , Ala-T β 4组 16.86土 1.8% (Ρ< 0.0005); 阴性对照组与阳性对照组、 Α1 -Τβ4组之间有 显著性差异, 尤其 Ala-T β 4 组有非常显著性差异。 这些结果表明 Ala-T β 4和 Τβ4均能有效减少心肌梗塞引起的心肌纤维化(见图 6)。其中,所述 Ala- TP 4引起所述心肌纤维化的减少效果出人意料 的大大高于 Τβ 4的效果。 实施例 4 Gly-T β 4、 Ala-T β 4与 Τ β 4对大鼠表皮损伤模型的治疗 效果评价
1. 病态动物模型的制作与试验方法
为了评价和比较 Gly- Τ β 4与 Τ β 4修复表皮组织损伤的活性性, 建立了表皮损伤的病态动物模型: 大鼠表皮损伤模型。
肌肉注射甲苯噻嗪 5mg/kg; 氯胺酮 50mg/kg麻醉, 用碘酒、 酒 精消毒大鼠后背皮肤; 完全干燥后铺无菌手术巾, 暴露手术部位, 在完全无菌状态下进行手术。 切开大鼠后背皮肤 3cm。
2. 利用电脑图像分析系统测量伤口长度 1) Gly-TP4与 Τβ4的比较
如上述步骤 1)建立大鼠表皮损伤模型后, 分别向阴性对照組 (每组 10只, 生理盐水 50μ1/只), 阳性对照組(每组 10只, 天然 胸腺素 5μ /50μ1/只), 试验组(每组 20只, 胸腺素衍生物 Gly-T β4 5μ§/50μ1/只)表皮涂抹给药, 每天 4次。
给药 5天后, 利用电脑图像分析系统测量伤口长度。 结果如下: 基础值(第 Q天, 给药前), 阴性对照组 3.15 ±0.21, 阳性对 照组 3.07土 0.18, Gly-T β 4组 3.13 ± 0, 11,各组之间无显箸性差异。
给药第 5天阴性对照组 2· 37土 0.18, 阳性对照组 1.62士 0.13, Gly-T β 4组 1· 14 ± 0.12各组之间有显著性差异。
这些结果显示, Gly- Τβ4能有效促进表皮伤口愈合(见图 3)。 其中, G 1 y-T Ρ 4促进表皮伤口愈合的活性出人意料的明显强于 Τ β 4。
2) Ala-TP4与 Τβ4的比较
如步骤 1)建立大鼠表皮损伤模型后, 用喷雾器局部喷射给予 阴性对照物 (PBS)、 阳性对照物(Τβ4)、 试验物质 (Ala - Τ β 4 ), 每天喷 4次。 TP 4、 Ala - Τβ4的药物浓度为 lOO g/ml,
用药后每天观察伤口愈合情况。
试验结果
① 伤口炎症反应: PBS组伤口的红肿、渗出等炎症反应较明显, 持续约 2- 3天; Τβ 4组和 Ala -T β 4组的炎症反应较轻微, 持续约 1-2天。
② 伤口愈合时间: 伤口愈合时间 PBS组为 7.3 ±1.02天, Τβ4 组为 5.8 ±0.91天, Ala - Τ β 4组为 4.7 ± 0.83天。 各组之间比较, Τ β 4组和 Ala - Τ β 4组伤口愈合时间明显短于 PBS组(Ρ<0.05) , 结 果见图 7。
结果表明 Τβ4和 Ala - Τβ4均具有明显的促进伤口愈合的作 用。 其中, 施用 Ala -Τβ 4的伤口愈合时间明显比施用 Τβ 4的短 ③瘢痕大小: 给药 2周后, 比较各组的瘢痕大小, 其结果为: 阴性对照组为 2.3 ± 0.31cm, Τ β 4组为 1· 9 ± 0.23cra, Ala - T β 4组 为 1.7±0. 30cm; 而且 Τβ 4組和 Ala -Τβ 4组的瘢痕为较细的线 状瘢痕、 表面比较平整, 而阴性对照组瘢痕为较粗、 表面不平。
各组之间比较, Τ β 4组和 Ala - Τ β 4组伤口瘢痕明显小于 PBS组 (Ρ<0.05), 结果见图 8。
结果表明, Τ β 4和 Ala - Τ β 4均具有明显的抗瘢痕形成作用。 其中, 施用 Ala-TP4的伤口瘢痕明显比施用 Τβ4的小 实施例 5 Gly-T β 4、 Ala- Τ β 4与 Τ β 4对大鼠角膜损伤模型的治疗 效果评价
1. Gly-T&4与 Τβ4的比较
1)、 病态动物模型的制作与试猃方法
为了评价 Gly- Τ β 4与 Τ β 4修复角膜组织损伤的活性性, 建立 了急性角膜损伤的病态动物模型: 大鼠角膜碱烧伤模型。
把直径 2亳米的滤纸片浸泡到 1 Ν的烧碱中, 然后将浸泡好的 滤纸片放到大鼠角膜正中央, 30 秒以后用 PBS 充分沖洗。 立刻用 Gly-TP4与 Τβ4治疗, 4天后挖出眼球, 10%甲醛固定后用石蜡包 埋, 沿着瞳孔视神经平面连续切片, 切好的片用图像分析系统釆集、 分析角膜上皮恢复情况。
2 ) .利用电脑图像分析系统测量角膜上皮恢复情况
如上述步骤 1)建立大鼠角膜损伤模型后, 分别向阴性对照组 (每组 10只, 用滴眼液局部给予生理盐水 30μ1/只, 4次 /天), 阳 性对照组(每组 10只,天然胸腺素 30μ1/只, 4次 /天),试验組 (每 组 10只, 胸腺素 Gly- Τβ 4 30μ1/只, 4次 /天) 眼部给药。 给药 4天后挖出眼球, 10%甲醛固定后用石蜡包埋, 沿着瞳孔视 神经平面连续切片, 切好的片用图像分析系统釆集、 分析角膜上皮 恢复情况。 结果如下:
基石出值(第 0天, 给药前), 阴性对照组 4·82±0·12, Τβ4组 4.76 ±0.18, 017-丁04组4.85±0.16, 各组之间无显箸性差异。
给药笫 4天阴性对照组 4· 89 ±0.12, Τβ4组 7.03 ±0.13,Gly-T β 4组 7.62士 0.11, 阴性对照組与 Τ β 4组、 Gly-T β 4组之间有显著 性差异, 尤其 Gly-T β 4组有非常显著性差异。
这些结果表明 Gly-T β 4和 T P 4均能有效促进角膜碱烧伤后的 恢复(见图 4)。其中, Gly-T Ρ 4促进角膜损伤修复的活性出人意料 的明显强于 Τβ 4。
2. Ala-TP4与 Τβ4的比较
1)、 病态动物模型的制作与试驗方法
为了评价 Ala-T Ρ 4与 Τ Ρ 4的药物有效性,建立了急性角膜损伤 的病态动物模型: 家兔角膜碱烧伤模型。
把直径 8亳米的滤纸片浸泡到 1 N的烧碱中, 然后将浸泡好的滤 纸片放到家兔角膜正中央, 30秒以后用生理盐水充分冲洗。 立刻用 Ala-TP4与 Τβ4治疗。 分别于 1, 5天后挖出眼球, 10%甲酪固定 后用石蜡包埋, 沿着瞳孔视神经平面连续切片, 切好的片经染色后 用图像分析系统釆集、 分析角膜上皮恢复情况。
2)、 给药方法
建立家兔角膜碱烧伤模型后, 用滴眼液局部给予阴性对照物 ( PBS )、 阳性对照物( Τ β 4 )、试验物质 ( Ala - Τ β 4 ),每天滴 4次。 TP 4、 人1&- 4的药物浓度为 50(^ 8/1111, 用药后每天观察角膜上 皮恢复情况。
3)、 试验结果 角膜上皮恢复情况: Τβ4组、 Ala -Τ β 4组和 PBS组在给药第 一天时, 均观察到角膜上皮被减烧毁(参见图 9A-C;)。 然而, PBS 组在第五天试验结束时,有部分角膜上皮细胞还未长出(见图 10A); Τ β 4组在第五天试验结束时,所有损伤的角膜上皮细胞均恢复正常, 且可以观察到 1-2层上皮细胞出现(见图 10B); Ala- TP 4组在第 五天试验结束时, 所有损伤的角膜上皮细胞均恢复正常, 且可以观 察到 3-4层上皮细胞出现(见图 10C )。各组之间比较, Τ β 4组和 Ala -T β 4组角膜上皮恢复情况明显优于 PBS组, Ala -T β 4组角膜上皮 恢复情况明显优于 Τ β 4组。 结果表明 , Τ β 4和 Ala - Τ Ρ 4具有明显 的促进膜碱烧伤的角膜上皮恢复作用, 其中 Ala -Τβ 4的角膜上皮 恢复作用优于 TP 4。

Claims

权利要求
1. 胸腺素 β 4衍生物, 其选自具有 SEQ ID NO: 6所示氨基酸序列 的 Gly-T β 4和具有 SEQ ID NO: 5所示氨基酸序列的 Ala- Τ β 4。
2. —种多核苷^列,其编码权利要求 1所述的胸腺素 β 4衍生 物。
3. 一种药物组合物 , 其含有权利要求 1所述的胸腺素 β 4衍生 物, 以及任选的药物上可接受的载体。
4. 权利要求 1的胸腺素 Ρ 4衍生物用于制备治疗皮肤组织损伤、 心脏组织损伤、 角膜损伤和 /或冠心病的药物的用途。
5. —种治疗受试对象中皮肤组织损伤、 心脏组织损伤、 角膜损 伤和 /或冠心病的方法, 包括向所述受试对象施用治疗有效量的权利 要求 1中所述的胸腺素 β 4衍生物。
6. 权利要求 5的方法, 其中所述受试对象是人。
PCT/CN2006/001679 2005-07-15 2006-07-14 Derives de thymosine beta 4 et utilisation WO2007009359A1 (fr)

Priority Applications (5)

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EP06761426A EP1908779B1 (en) 2005-07-15 2006-07-14 Thymosin beta 4 derivatives and use thereof
US11/995,817 US7816321B2 (en) 2005-07-15 2006-07-14 Thymosin β4 derivatives and use thereof
JP2008520699A JP5180074B2 (ja) 2005-07-15 2006-07-14 サイモシンβ4誘導体及びその使用方法
PL06761426T PL1908779T3 (pl) 2005-07-15 2006-07-14 Pochodne tymozyny beta 4 i ich zastosowanie
CN200680025339A CN100582121C (zh) 2005-07-15 2006-07-14 胸腺素β4衍生物及其应用

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CN200510083894.6 2005-07-15
CN 200510083894 CN1896096A (zh) 2005-07-15 2005-07-15 基因工程方法生产的高活性胸腺素β4衍生物
CNB2005101032937A CN100484957C (zh) 2005-09-23 2005-09-23 胸腺素β4衍生物及其应用
CN200510103293.7 2005-09-23

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CN109865127A (zh) * 2018-11-22 2019-06-11 北京诺思兰德生物技术股份有限公司 经修饰的胸腺素β4在治疗糖尿病周围神经病变方面的用途

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CN109865127A (zh) * 2018-11-22 2019-06-11 北京诺思兰德生物技术股份有限公司 经修饰的胸腺素β4在治疗糖尿病周围神经病变方面的用途

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KR100984635B1 (ko) 2010-10-01
CN101218249A (zh) 2008-07-09
US7816321B2 (en) 2010-10-19
JP5180074B2 (ja) 2013-04-10
PL1908779T3 (pl) 2013-06-28
EP1908779B1 (en) 2013-01-09
EP1908779A1 (en) 2008-04-09
JP2009500045A (ja) 2009-01-08
KR20080040708A (ko) 2008-05-08
CN100582121C (zh) 2010-01-20
US20090298758A1 (en) 2009-12-03

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