WO2013044499A1 - 丙型肝炎病毒免疫原性肽或其衍生物在制备预防或治疗结肠炎的药物中的应用 - Google Patents

丙型肝炎病毒免疫原性肽或其衍生物在制备预防或治疗结肠炎的药物中的应用 Download PDF

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WO2013044499A1
WO2013044499A1 PCT/CN2011/080435 CN2011080435W WO2013044499A1 WO 2013044499 A1 WO2013044499 A1 WO 2013044499A1 CN 2011080435 W CN2011080435 W CN 2011080435W WO 2013044499 A1 WO2013044499 A1 WO 2013044499A1
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Prior art keywords
peptide
derivative
colitis
thr
formula
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PCT/CN2011/080435
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English (en)
French (fr)
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程云
虞瑞鹤
赵万洲
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Cheng Yun
Yu Ruihe
Zhao Wanzhou
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Priority to CN201180073655.6A priority Critical patent/CN103987398A/zh
Priority to PCT/CN2011/080435 priority patent/WO2013044499A1/zh
Publication of WO2013044499A1 publication Critical patent/WO2013044499A1/zh

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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K38/00Medicinal preparations containing peptides
    • A61K38/04Peptides having up to 20 amino acids in a fully defined sequence; Derivatives thereof
    • A61K38/08Peptides 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
    • 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
    • A61P1/04Drugs for disorders of the alimentary tract or the digestive system for ulcers, gastritis or reflux esophagitis, e.g. antacids, inhibitors of acid secretion, mucosal protectants
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07KPEPTIDES
    • C07K14/00Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
    • C07K14/005Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from viruses
    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12NMICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N2770/00MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA ssRNA viruses positive-sense
    • C12N2770/00011Details
    • C12N2770/24011Flaviviridae
    • C12N2770/24211Hepacivirus, e.g. hepatitis C virus, hepatitis G virus
    • C12N2770/24222New viral proteins or individual genes, new structural or functional aspects of known viral proteins or genes

Definitions

  • the present invention relates to the field of medical technology, and in particular to the use of hepatitis C virus immunogenic peptides and derivatives thereof for the preparation of a medicament for preventing or treating colitis, in particular to the prevention of preparation of the peptide or its derivative Or in the treatment of drugs for ulcerative colitis.
  • Background technique hepatitis C virus immunogenic peptides and derivatives thereof for the preparation of a medicament for preventing or treating colitis, in particular to the prevention of preparation of the peptide or its derivative Or in the treatment of drugs for ulcerative colitis.
  • Colitis is a common intestinal disease.
  • the clinical manifestations of patients are weight loss, fatigue, fever, anemia, etc.
  • a small number of patients in the chronic course of disease the condition will suddenly deteriorate, showing severe diarrhea, 10-30 times a day, discharged Blood, pus, mucus feces, and high fever, vomiting, tachycardia, exhaustion, water loss, electrolyte imbalance, conscious coma and even colon perforation, can not cause timely death.
  • colitis caused by drugs eg, trinitrobenzene sulfonic acid, etc.
  • drugs eg, trinitrobenzene sulfonic acid, etc.
  • the present inventors have disclosed a hepatitis C virus immunogenic peptide or a derivative thereof (abbreviated as 7P peptide or a derivative thereof, the same name in the present invention) in Chinese patents CN1194986C and CN1216075C, which is an initial basis.
  • Cytokines one of the main cytokines of the human immune system against viral infection, are of great significance for the clearance of HCV (hepatitis C virus), so 7P peptide or its derivatives have the prevention and/or treatment of hepatitis C. effect.
  • the 7P polypeptide or a derivative thereof can be synthesized by a solid phase synthesis method or a liquid phase synthesis method well known to those skilled in the art, or can be obtained by genetic engineering fusion expression and purification, and specifically recorded.
  • the present inventors disclose, in the patent application PCT/CN2006/001176, the use of the 7P peptide or a derivative thereof for preventing and treating liver damage, according to the description of the prior application, the 7P peptide or The derivative significantly reduces the levels of aspartate aminotransferase and alanine aminotransferase in serum, and exhibits a significant preventive or therapeutic effect on liver damage caused by immune liver damage and hepatotoxic chemicals. Thereafter, this issue
  • the Chinese patent application CN101559217A further discloses that the 7P peptide or its derivative has a certain therapeutic effect on nephritis, especially through the digestive tract, which can significantly reduce serum protein-induced nephritis and Heymann. 's nephritis.
  • Colitis has completely different pathogenic mechanisms from liver injury and nephritis, and completely different clinical manifestations. It has been unexpectedly found in the study of the present inventors that the peptide or its derivative also has the effect of improving the symptoms of colitis lesions, especially It is an effect of improving the symptoms of ulcerative colitis induced by trinitrobenzenesulfonic acid, and there is no report in the prior art that the peptide or its derivative is applied to the prevention and treatment of colitis. . Summary of the invention
  • the present invention provides the use of the above hepatitis C virus immunogenic peptide or a derivative thereof for preparing a medicament for preventing or treating colitis, and provides a new clinical method for the treatment and prevention of colitis diseases, and broadens the A potential medicinal field of the 7P peptide.
  • the present invention also provides a method for treating colitis by using the hepatitis C virus immunogenic peptide or a derivative thereof, and achieving significant improvement by administering to a patient a drug containing a therapeutically effective amount of the peptide or a derivative thereof The purpose of the pathological symptoms of colitis.
  • the present invention provides the use of a peptide of the formula I or a derivative thereof for the preparation of a medicament for preventing or treating colitis:
  • Xaal is missing, Ala, Gly, Val, Leu or l ie,
  • Xaa2 is Thr or Ser
  • Xaa3 is Tyr, Phe or Trp
  • Xaa4 is missing, Ala, Gly, Val, Leu, l ie or Pro;
  • the derivative includes a pharmaceutically acceptable salt or ester of the peptide.
  • ulcerative colitis is effective for preventing or treating colitis, particularly for preventing or treating ulcerative colitis which can be induced by trinitrobenzenesulfonic acid.
  • ulcerative colitis induced by trinitrobenzenesulfonic acid is mainly characterized by colonic mucosal congestion and edema, epithelial shedding, necrosis, ulceration, and a large amount of inflammatory cell infiltration in the submucosa. Some ulcers can be deep in the muscle layer, fibrous connective tissue and vascular proliferation.
  • the basic structure and composition of the peptide represented by the above formula I or its derivative are the hepatitis C virus immunogenic peptides or derivatives thereof obtained by the inventors in the previous studies, and thus collectively referred to as 7P peptides or derivatives thereof. .
  • ester refers to an ester that is suitable for contact with the tissues of a human or animal without excessive toxicity, irritation or allergic reaction, and the like.
  • esterification can reduce the hydrolysis of peptides by proteases in the body.
  • Modification of the terminal amino, carboxyl or side chain groups of the peptides of the invention can form pharmaceutically acceptable esters. Modifications to amino acid side chain groups include, but are not limited to, threonine, esterification of a serine side chain hydroxyl group with a carboxylic acid.
  • the amino acid terminal group is protected with a protecting group known to those skilled in the art of protein chemistry, such as acetyl, trifluoroacetyl, Fmoc (9-fluorenyl-methoxycarbonyl), Boc (tert-butoxycarbonyl) , Alloc (allyloxycarbonyl), d- 3 fluorenyl, C 6 - 12 aryl fluorenyl and the like.
  • a protecting group known to those skilled in the art of protein chemistry such as acetyl, trifluoroacetyl, Fmoc (9-fluorenyl-methoxycarbonyl), Boc (tert-butoxycarbonyl) , Alloc (allyloxycarbonyl), d- 3 fluorenyl, C 6 - 12 aryl fluorenyl and the like.
  • a protecting group known to those skilled in the art of protein chemistry such as acetyl, trifluoroacetyl, Fmoc (9-flu
  • the inventors have found that the peptide of the present invention is not modified enough to be treated under physiological conditions, and therefore it is preferred not to have an amino group at the N-terminus of the polypeptide of the formula I and a carboxyl group at the C-terminus and an amino acid side chain group. Modification, the chemical group at the N-terminus of the SP is still the ⁇ -amino group (- ⁇ 2 ⁇ ) on the first amino acid, and the chemical group at the C-terminus is the carboxyl group of the C-terminal amino acid (-C00H).
  • pharmaceutically acceptable salt refers to a salt that is suitable for contact with the tissues of a human or animal without excessive toxicity, irritation or allergic reaction, and the like.
  • Pharmaceutically acceptable salts are well known in the art. Such salts may be prepared during the final isolation and purification of the polypeptides of the invention, or may be prepared separately by reacting the peptide with a suitable organic or inorganic acid or base.
  • Representative acid addition salts include, but are not limited to, acetate, dihexanoate, alginate, citrate, aspartate, benzoate, besylate, hydrogen sulfate, butyrate , camphorate, camphor sulfonate, glycerol phosphate, hemisulfate, heptanoate, hexanoate, fumarate, hydrochloride, hydrobromide, hydroiodide, 2-hydroxyethanesulfonate Acid salt, lactate, maleate, methanesulfonate, nicotinate, 2-naphthalenesulfonate, oxalate, 3-phenylpropionate, propionate, succinate, tartrate , phosphate, glutamate, bicarbonate, p-toluenesulfonate and undecanoate.
  • Preferred acids which can be used to form pharmaceutically acceptable salts are hydrochloric acid, hydrobromic acid, sulfuric acid, phosphoric acid, oxalic acid, maleic acid, succinic acid and citric acid.
  • the cations in the pharmaceutically acceptable base addition salt include, but are not limited to, alkali metal or alkaline earth metal ions such as lithium, sodium, potassium, calcium and magnesium, and the like, quaternary ammonium cations (such as tetramethylammonium, tetraethylammonium, etc.) , and ammonium, methyl a cation of an amine, dimethylamine, trimethylamine, triethylamine, diethylamine, ethylamine, diethylamine, ethanolamine, diethanolamine, piperidine, piperazine or the like.
  • Preferred base addition salts include phosphates, trishydroxymethylaminotrimidine (tris) and acetates. These salts are generally capable of increasing the solubility of the polypeptide, and the salt formed does not substantially alter the activity of the polypeptide.
  • the polypeptide of the present invention may be used singly or in the form of a pharmaceutically acceptable salt.
  • the medicament for preventing and/or treating colitis may be a direct use of the peptide, or a pharmaceutical preparation in the form of a pharmaceutically acceptable salt or a pharmaceutically acceptable ester of the peptide.
  • the peptide or a derivative thereof is a peptide represented by the formula ⁇ or a pharmaceutically acceptable salt or ester thereof: Gly-Gln-Thr-Tyr-Thr-Ser-Gly (formula).
  • the peptide of formula II can also be abbreviated as GQTYTSG according to the manner of amino acid known in the art.
  • the peptide or a derivative thereof may be in a suitable preparation form according to the purpose of prevention and/or treatment, and the administration route, for example, an injection, a lyophilized powder for injection, a spray, an oral solution, Oral suspensions, tablets, capsules, enteric coated tablets, pills, powders, granules, sustained release agents (a dosage form that can control the slow release of the active ingredient of the agent) or a controlled release agent (a dosage form that can control the release of the active ingredient of the agent), etc.
  • Formulations which may contain conventional pharmaceutically acceptable carriers, which refer to non-toxic solid, semi-solid or liquid fillers, diluents, adjuvants, encapsulating materials or other preparations.
  • Excipients for example: physiological saline, isotonic glucose solution, buffered saline, glycerol, ethanol, and combinations of the above.
  • physiological saline isotonic glucose solution
  • buffered saline glycerol
  • ethanol e.g., glycerol
  • a drug made of the peptide or a derivative thereof by injection, SP, and it is preferred to use an injection or a lyophilized powder injection to dissolve using physiological saline as a carrier.
  • the invention provides a method for treating colitis comprising: administering to a patient a medicament comprising a therapeutically effective amount of the peptide of the above formula I or a derivative thereof, the derivative comprising the peptide being pharmaceutically acceptable Salt or ester.
  • the peptide or the derivative thereof as an active ingredient in the therapeutic drug may be the peptide represented by the above formula II or a pharmaceutically acceptable salt or ester thereof.
  • the above-mentioned medicament containing a therapeutically effective amount of a peptide or a derivative thereof can effectively prevent or treat colitis, in particular, prevent or treat ulcerative colitis, and more advantageously, treatment by three Ulcerative colitis induced by nitrobenzenesulfonic acid.
  • the patient is administered a therapeutically effective amount of from 180 to 3000 ⁇ g of said peptide or derivative thereof Biological drugs.
  • the medicament is administered to the patient comprising a therapeutically effective amount of the peptide or derivative thereof of from 240 to 1800.
  • the therapeutically effective amount in the context of the present invention is an effective amount for a typical adult body weight, single administration.
  • the medicament containing a therapeutically effective amount of the peptide or derivative thereof is preferably administered by injection.
  • a unit preparation which is a preparation which satisfies the active ingredient required for one administration, and a common unit preparation such as one unit (tablet) tablet, one unit (needle) injection or A powder injection or the like, wherein the content of the active ingredient is the amount required for one administration.
  • the amount of drug required for a single administration of a patient can be conveniently obtained by calculating the product of the patient's body weight and the unit weight dose required for the patient to take the drug once.
  • an adult has a body weight of 50-70 kg, which can be calculated using the body weight value.
  • the unit body weight of the test animal and human can be calculated by the equivalent dose conversion relationship.
  • the equivalent dose conversion relationship between experimental animals and humans known to those skilled in the art see also (Huang Jihan et al., "Intra-animal testing in pharmacological tests. Equivalent dose conversion between animals and human body", Chinese Journal of Clinical Pharmacology and Therapeutics, 2004 Sep; 9 (9): 1069 - 1072)
  • the effective dose of human can be derived from the dose of experimental animals.
  • the dosage of human and rat can be converted according to the body surface area conversion coefficient of human and rat of 0. 018.
  • the peptide or derivative thereof in the unit preparation is 30-300 ⁇ g/
  • the therapeutic effect of the kg rat dose is better when administered to rats, and the therapeutic effect is even more when administered to a rat at a dose of 40-180 g/kg rat, for example, 174, 87, or 43.5 ⁇ g/kg rat.
  • the pharmaceutical manufacturer can obtain the active ingredient content in the unit preparation for human use according to the above conversion method, and apply it to the pharmaceutical process thereof.
  • the unit preparation contains 300-3000 doses of the peptide or a derivative thereof, preferably containing the peptide at a dose of 400-1800 g. Or a derivative thereof, for example, 1740 g, 870 g, or 435 ⁇ g of the peptide or a derivative thereof.
  • the peptide or a derivative thereof is used for preventing or treating colitis, which can effectively improve the symptoms of colitis, in particular, to improve the symptoms of colitis induced by trinitrobenzenesulfonic acid,
  • the group using the peptide or its derivative showed a significantly reduced rat knot compared to the model group.
  • the extent of the pathology of enteritis therefore, the practice of the present invention contributes to the development of a therapeutic drug for colitis or related diseases.
  • SPF grade SD rats weighing 180g ⁇ 220g, male and female, were purchased from the Experimental Animal Center of the Chinese Academy of Military Medical Sciences.
  • the description of Example 1 was dissolved in physiological saline at the time of use.
  • Positive control drug Wicic (sulphur sulfapyridine, SASP), purchased from Shanghai 3D Pharmaceutical Co., Ltd.
  • d SASP peptide A drug high, medium and low dose groups (administration of trinitro Benzenesulfonic acid, and peptide A at a dose of 174 ⁇ g/kg ⁇ d, 87 ⁇ g/kg ⁇ d, 43.
  • peptide A drug high, medium and low dose groups pass The rats were administered by subcutaneous injection.
  • the rats were administered 0.1 ml of the peptide A solution per 100 g of the body weight, and the blank control group was administered with the same amount of physiological saline (the rats were given 0.1 ml of physiological saline per 100 g of body weight).
  • each group of rats was administered as follows. During the administration, each group of rats was normally fed daily unless otherwise specified:
  • the blank control group had a normal diet and no medication was administered; the rats in the other groups except the blank control group were fasted 24 hours a day but could not avoid water;
  • the rats in the other groups except the blank control group were anesthetized by intraperitoneal injection with 0.2 ml of ketamine hydrochloride, gently inserted from the rat anus with a gavage needle, inserted into the intestine about 8 cm, physiologically
  • the intestinal tract was washed with saline, and each rat was filled with 50% (w/w) ethanol solution containing 30 mg of trinitrobenzenesulfonic acid (2.5 ml), and the anus was placed in a flat position for 5 min.
  • the blank control group and the model group were injected subcutaneously with the normal, low-dose, and normal doses of the peptide A drug for 7 times a day; Rats in the high, medium and low dose groups were administered the corresponding doses of peptide A, respectively, followed by subcutaneous or intragastric administration once every other day for 7 times; for the positive drug group, SASP was administered by intragastric administration. Once, for 14 consecutive days.
  • the rats in the model group had increased frequency of bowel movements, such as irritability, mucus pus and bloody stools, indicating inflammatory lesions in the colon.
  • the number of defecations in the high-, medium-, and low-dose groups of the peptide A group and the rats in the positive drug group decreased compared with the model group, and the symptoms of mucus pus and bloody stools were alleviated.
  • the rank sum test method was used to obtain the comprehensive score results of the pathological examination indicators, as shown in the table. It can be seen that the therapeutic effect of the peptide A drug in the middle dose group is comparable to that of the positive drug (SASP) group, while the peptide A low dose group has shown effective intervention or treatment for colitis lesions.
  • Table 1 Results of severity of ulcerative colitis lesions Group Other IJ Number of animals (only) ⁇ Lesion score ( ⁇ SD) Blank control group 10 1. 33 ⁇ 0.65** Model group 10 6.86 ⁇ 1.57

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Abstract

本发明提供了如式I所示的丙型肝炎病毒免疫原性肽或其衍生物在制备预防或治疗结肠炎特别是由三硝基苯磺酸诱导产生的溃疡性结肠炎的药物中的应用。Xaal-Gln-Xaa2-Xaa3-Thr-Ser-Gly-Xaa4 (式I),Xaal为缺失、Ala、Gly、Val、Leu或Ile,Xaa2为Thr或Ser,Xaa3为Tyr、Phe或Trp,并且Xaa4为缺失、Ala、Gly、Val、Leu、Ile或Pro。

Description

丙型肝炎病毒免疫原性肽或其衍生物在制备预防或治疗结肠炎的药物中 的应用
技术领域
本发明属于医药技术领域, 具体而言, 本发明涉及丙型肝炎病毒免疫 原性肽及其衍生物的在制备预防或治疗结肠炎的药物中的应用, 尤其涉及 该肽或其衍生物制备预防或治疗溃疡性结肠炎的药物中的应用。 背景技术
结肠炎是一种常见的肠道疾病, 患者临床表现为消瘦、 乏力、 发热、 贫血等, 少部分病人在慢性的病程中, 病情会突然恶化, 表现严重腹泻, 每日 10-30 次, 排出含血、 脓, 粘液的粪便, 并有高热、 呕吐、 心动过速、 衰竭、 失水、 电解质紊乱、 神志昏迷甚至结肠穿孔, 不及时治疗可以造成 死亡。 近年来, 由药物 (如, 三硝基苯磺酸等) 引起的结肠炎越来越引起 人们的关注, 所以针对这类结肠炎疾病的有效药物的研究也成为本领域的 主要研究课题之一。
本发明人在中国专利 CN1194986C和 CN1216075C中披露了一种丙型肝 炎病毒免疫原性肽或其衍生物 (简称 7P肽或其衍生物, 本发明中也采用相 同的名称), 是一种最初根据丙型肝炎病毒而设计的免疫原性肽, 并证明所 述 7P肽或其衍生物具有诱导细胞因子 r-IFN, IL-4, IL-10和抗体产生的功 能, r-IFN是 Thl分泌的细胞因子, 是人体免疫系统抵抗病毒感染的主要细 胞因子之一, 针对 HCV (丙型肝炎病毒)的清除具有相当重要的意义, 因此 7P肽或其衍生物具有预防和 /或治疗丙型肝炎的作用。根据该在先专利的记 载, 所述 7P多肽或其衍生物可通过本领域技术人员熟知的固相合成法或液 相合成法合成, 也可通过基因工程融合表达并提纯获得, 并具体记载了序 列为 GQTYTSG的肽及其衍生物在预防和 /或治疗丙型肝炎的作用。进一歩的, 本发明人在专利申请 PCT/CN2006/001176中公开了所述 7P肽或其衍生物在 预防和治疗肝损伤中的用途, 根据该在先申请的记载, 所述 7P肽或其衍生 物显著降低了血清中谷草转氨酶以及谷丙转氨酶的水平, 表现对免疫性肝 损伤和肝毒性化学物质引起的肝损伤显著的预防或治疗作用。 此后, 本发 明人在中国专利申请 CN101559217A中, 进一歩披露了所述 7P肽或其衍生 物对于肾炎也有一定的治疗作用, 尤其是通过消化道的方式进行施用, 能 显著降低由血清蛋白诱导的肾炎以及 Heymann' s肾炎。
结肠炎与肝损伤和肾炎有着完全不同的致病机理, 和完全不同的临床 表现, 在本发明人的研究中意外发现, 所述肽或其衍生物还具有改善结肠 炎病变症状的作用, 特别是具有改善对由三硝基苯磺酸诱导产生的溃疡性 结肠炎的病变症状的作用, 而现有技术中还没有将所述肽或其衍生物应用 到结肠炎的预防和治疗中的报道。 发明内容
本发明提供了上述丙型肝炎病毒免疫原性肽或其衍生物在制备预防或 治疗结肠炎的药物中的应用, 为结肠炎类疾病的治疗和预防提供了新的临 床方法, 也拓宽了该 7P肽的潜在药用领域。
本发明还提供了一种利用所述丙型肝炎病毒免疫原性肽或其衍生物治 疗结肠炎的方法, 通过向患者施用含有治疗有效量的所述肽或其衍生物的 药物, 达到显著改善结肠炎的病变症状的目的。
本发明提供了如式 I所示的肽或其衍生物在制备预防或治疗结肠炎的药 物中的应用:
Xaa 1 -G 1 n-Xaa2-Xaa3-Thr-S er~G 1 y-Xaa4 (式 I ) 其中,
Xaal为缺失、 Ala、 Gly、 Val、 Leu或 l ie,
Xaa2为 Thr或 Ser,
Xaa3为 Tyr、 Phe或 Trp, 而且
Xaa4为缺失、 Ala、 Gly、 Val、 Leu、 l ie或 Pro;
所述衍生物包括所述肽在药学上可接受的盐或酯。
施用有效剂量的所述肽或其衍生物能够有效预防或治疗结肠炎, 尤其能 预防或治疗溃疡性结肠炎, 所述溃疡性结肠炎可由三硝基苯磺酸诱导产生。 临床上, 由三硝基苯磺酸诱导产生的溃疡性结肠炎主要表现为结肠黏膜充 血水肿、 上皮脱落、 坏死、 溃疡形成、 黏膜下层有大量的炎性细胞浸润, 某些溃疡可深达肌层、 纤维结缔组织和血管增生明显。 上述式 I所示的肽或 其衍生物的基本结构和组成即为发明人在之前的研究中所得到的丙型肝炎 病毒免疫原性肽或其衍生物, 因此统称为 7P肽或其衍生物。
在本文中, 所述 "药学上可接受的酯"指适于与人或动物的组织接触而 且无过多的毒性、 刺激或变态反应等的酯。 通常, 酯化修饰后能降低机体 中的蛋白酶对肽的水解。 对本发明的肽的末端氨基、 羧基或侧链基团进行 修饰可以形成药学上可接受的酯。 对氨基酸侧链基团的修饰包括但不限于 苏氨酸、 丝氨酸侧链羟基与羧酸发生的酯化反应。 优选氨基酸末端基团用 蛋白质化学领域的技术人员已知的保护性基团保护起来, 如乙酰基、 三氟 乙酰基、 Fmoc (9-芴基 -甲氧羰基) 、 Boc (叔丁氧羰基) 、 Alloc (烯丙氧 羰基)、 d—3垸基、 C612芳垸基等。有关该 7P肽的药用酯在 PCT/CN2006/001176 中有详细说明, 因此将该相关内容并入本案作为参考。 在本发明的具体实 施方式中, 发明人发现, 本发明的肽不经修饰也足以在生理条件下进行治 疗, 因此优选不对式 I 多肽 N末端的氨基和 C末端的羧基以及氨基酸侧链基 团进行修饰, SP N末端的化学基团仍旧为第一个氨基酸上的 α -氨基 (-ΝΗΒ) , C末端的化学基团是 C末端氨基酸的羧基 (-C00H) 。
在本文中, "药学上可接受的盐"指适于与人或动物的组织接触而且无 过多的毒性、 刺激或变态反应等的盐。 药学上可接受的盐是本领域熟知的。 这种盐可以在本发明多肽的最终分离和纯化的过程中制备, 也可以将肽与 适当的有机或无机酸或碱反应单独制备。 代表性酸加成盐包括但不限于乙 酸盐、 二己酸盐、 藻酸盐、 柠檬酸盐、 天冬氨酸盐、 苯甲酸盐、 苯磺酸盐、 硫酸氢盐、 丁酸盐、 樟脑酸盐、 樟脑磺酸盐、 甘油磷酸盐、 半硫酸盐、 庚 酸盐、 己酸盐、 富马酸盐、 盐酸盐、 氢溴酸盐、 氢碘酸盐、 2-羟基乙磺酸 盐、 乳酸盐、 马来酸盐、 甲磺酸盐、 烟酸盐、 2-萘磺酸盐、 草酸盐、 3-苯 基丙酸盐、 丙酸盐、 琥珀酸盐、 酒石酸盐、 磷酸盐、 谷氨酸盐、 碳酸氢盐、 对甲苯磺酸盐和十一垸酸盐。 能用于形成药学上可接受盐的优选的酸是盐 酸、 氢溴酸、 硫酸、 磷酸、 草酸、 马来酸、 琥珀酸和柠檬酸。 药学上可接 受的碱加成盐中的阳离子包括但不限于碱金属或碱土金属离子如锂、 钠、 钾、 钙和镁等, 季铵阳离子 (如四甲基铵、 四乙基铵等) , 以及铵、 甲基 胺、 二甲基胺、 三甲基胺、 三乙基胺、 二乙基胺、 乙基胺、 二乙胺、 乙醇 胺、 二乙醇胺、 哌啶、 哌嗪等的阳离子。 优选的碱加成盐包括磷酸盐、 三 羟甲基氨基甲垸 (tris ) 和乙酸盐。 这些盐一般能够增加多肽的溶解性, 而且所形成的盐基本上不改变多肽的活性。 本发明的多肽可以单独使用, 也可以以药学上可接受的盐形式使用。
总之, 根据本发明的方案, 所述预防和 /或治疗结肠炎的药物可以是直 接采用所述肽, 也可以是采用所述肽的药用盐或药用酯形式的药物制剂。
进一歩的, 所述肽或其衍生物为式 Π所示的肽或其药学上可接受的盐或 酯: Gly-Gln-Thr-Tyr-Thr-Ser-Gly (式 Π ) 。 根据本领域公知的氨基酸表 示方式, 式 II所示的肽还可以缩写为 GQTYTSG。
在本发明的方案中, 所述肽或其衍生物可根据预防和 /或治疗目的, 以 及施用途径采用适当的制剂形式, 例如: 注射剂、 (注射用) 冻干粉、 喷 雾剂、 口服溶液、 口服混悬液、 片剂、 胶囊、 肠溶片、 丸剂、 粉剂、 颗粒 剂、 缓释剂 (可控制药剂有效成分缓慢释放的剂型) 或控释剂 (可控制药 剂有效成分释放的剂型) 等制剂, 所述制剂中可包含常规的药学上可接受 的载体, 所述 "药学上可接受的载体"指无毒固态、 半固态或液态填充剂、 稀释剂、 佐剂、 包裹材料或其他制剂辅料, 例如: 生理盐水、 等渗葡萄糖 溶液、 缓冲盐水、 甘油、 乙醇及上述溶液的组合。 本发明的方案中优选以 注射方式施用由所述肽或其衍生物制成的药物, SP, 使用注射针剂或冻干 粉针剂是优选的, 以使用生理盐水作为载体溶解即可。
本发明提供的一种治疗结肠炎的方法, 包括, 向患者施用含有治疗有效 量的上述式 I所示的肽或其衍生物的药物, 所述衍生物包括所述肽在药学上 可接受的盐或酯。
根据本发明的优选方案, 所述治疗用药中作为有效成分的肽或其衍生物 可以为上述式 II所示的肽或其药学上可接受的盐或酯。
上述含有治疗有效量的肽或其衍生物的药物(所述肽或其衍生物作为有 效成分) 能够有效预防或治疗结肠炎, 尤其能预防或治疗溃疡性结肠炎, 更有利地是治疗由三硝基苯磺酸诱导产生的溃疡性结肠炎。 在本发明的一 个实施方式中, 向患者施用含有治疗有效量为 180-3000 μ g的所述肽或其衍 生物的药物。 进一歩优选的, 向患者施用含有治疗有效量为 240-1800 的 所述肽或其衍生物的药物。 本发明方案中的治疗有效量是针对一般成人体 重、 单次施用的有效量。
在本发明的一个实施方式中, 优选以注射方式施用含有治疗有效量的 所述肽或其衍生物的药物。 进一歩的, 优选对患者以单位制剂的剂量给药, 所述单位制剂为满足一次给药所需有效成分的制剂, 常见的单位制剂如一 单位 (片) 片剂、 一单位 (针) 针剂或粉针剂等, 其中有效成分的含量为 一次给药所需的量。 患者一次施用所需的药物的量可以方便地通过计算患 者的体重和该患者一次用药所需单位体重剂量的乘积得到。 例如, 在制备 药物的过程中, 一般认为成人体重为 50-70kg, 可以用该体重值来计算。 实 验动物与人的单位体重剂量可以通过等效剂量换算关系来计算。 例如, 根 据的本领域普通技术人员所公知的实验动物与人的等效剂量换算关系 (可 参见 FDA、 SFDA等药品管理机构的指导意见, 也可参见 (黄继汉等, "药理 试验中动物间和动物与人体间的等效剂量换算" , 中国临床药理学与治疗 学, 2004 Sep ; 9 (9) : 1069 - 1072 ) 可从实验动物的剂量推导出人的有效 剂量。 在本发明的实施方式中, 可以按照人和大鼠的体表面积折算系数 0. 018来换算人和大鼠的剂量。 根据本发明实施方式, 所述单位制剂中所述 肽或其衍生物以 30-300 μ g/kg大鼠剂量施用至大鼠时治疗效果较好, 当以 40-180 g/kg大鼠剂量, 例如 174、 87、 或 43. 5 μ g/kg大鼠剂量施用至大鼠 时治疗效果更佳。 制药商可以根据上述换算方法得到用于人的单位制剂中 的有效成分含量, 用以应用于其制药过程中。 在本发明的技术方案中, 根 据等效剂量换算关系以及人的常规体重, 并且综合用药安全、 成本和药效, 优选的, 所述单位制剂中含有 300-3000 剂量的所述肽或其衍生物, 优选 含有 400-1800 g剂量的所述肽或其衍生物, 例如 1740 g、 870 g , 或 435 μ g的所述肽或其衍生物。
根据本发明的研究, 将所述肽或其衍生物用于预防或治疗结肠炎, 可 有效改善结肠炎病变症状, 特别是改善由三硝基苯磺酸诱导产生的结肠炎 的病变症状, 从以下实施例的数据可以看出, 应用所述肽或其衍生物的组 (包括高、 中、 低剂量组) , 相比于模型组, 均表现出显著减轻的大鼠结 肠炎的病变程度。 因此本发明的实施, 有助于对结肠炎或相关疾病治疗用 药的开发。
为了便于理解, 以下将通过具体的实施例对本发明进行详细地描述。 需要特别指出的是, 具体实例仅是为了说明, 并不构成对本发明范围的限 制。 显然本领域的普通技术人员可以根据本文说明, 在本发明的范围内对 本发明做出各种各样的修正和改变, 这些修正和改变也纳入本发明的范围 内。 另外, 本发明引用了公开文献, 这些文献也是为了更清楚地描述本发 明, 它们的全文内容均纳入本发明而作为本发明说明书的一部分。 具体实施方式
实施例 1 肽 A对大鼠结肠炎的保护作用
1. 实验材料
1. 1 动物:
SPF级 SD大鼠, 体重 180g〜220g, 雌雄各半, 购自中国军事医学科学 院实验动物中心。
1. 2药物:
使用通过固相肽合成方法,由 413A型自动肽合成仪 (购自 Perkin Elmer 公司)合成的以下序列的肽: GQTYTSG (以下称为肽 A),具体的合成歩骤请 参加 PCT/CN2006/001176中实施例 1的记载,使用时用生理盐水溶解。
阳性对照药: 维柳芬 (柳氮磺胺吡啶, SASP) , 购自上海三维制药有限 公司。
1. 3分组及药物剂量
SD大鼠, 雌雄各半, 随机分为 6组, 大鼠每组 10只, 分组情况为: 模 型组 (施用生理盐水和三硝基苯磺酸); 空白对照组 (施用与模型组等量的 生理盐水), 阳性药物组 (施用与模型组等量的生理盐水、 三硝基苯磺酸、 以及 50mg/kg. d SASP) , 肽 A药物高、 中、 低剂量组 (施用三硝基苯磺酸、 以及剂量分别为 174 μ g/kg · d, 87 μ g/kg · d, 43. 5 μ g/kg · d的肽 A用 生理盐水配置成需要浓度的肽 A溶液), 肽 A药物高、 中、 低剂量组均通 过皮下注射方式进行给药, 大鼠每 100g体重给药 0. 1 ml的肽 A溶液, 空 白对照组使用等量的生理盐水 (大鼠每 100g体重给予 0. 1 ml生理盐水)。
2.试验方法
2. 1 实验方案:
按照以下方式对各组大鼠进行给药, 给药期间, 如无特别说明, 每天 向各组大鼠正常喂食:
第 1 日, 空白对照组正常饮食, 不施用任何药物; 除空白对照组外的 其余各组大鼠, 全天 24小时禁食但不禁水;
在第 2 日当天, 对除空白对照组外的其余各组大鼠, 用 0. 2ml盐酸氯 胺酮经腹腔注射麻醉, 用灌胃针头轻轻从大鼠肛门插入, 插入肠道约 8cm, 以生理盐水清洗肠道, 每只大鼠灌入含 30mg三硝基苯磺酸的 50 % (w/w) 乙醇溶液 2. 5ml, 捏紧肛门平放 5 min即可, 术后常规饲养;
从第 2日开始 (包括第 2日), 对空白对照组和模型组每间隔一天皮下 注射与肽 A药物高、 中、 低剂量组等量的生理盐水, 共注射 7次; 对肽 A 药物高、 中、 低剂量组的大鼠分别施用相应剂量的肽 A, 之后隔天皮下注射 或者灌胃给药一次,共给药 7次;对阳性药物组通过灌胃给药途径施用 SASP, 每天一次, 连续 14天。
在第 4 日观察到, 模型组大鼠相继出现排便次数增多, 烦躁、 黏液脓 血便等症状, 表明结肠发生炎症病变。 与模型组相比, 肽 A高、 中、 低剂 量组、 阳性药物组大鼠分别出现排便次数较模型组模型减少, 黏液脓血便 症状减轻。
各组最后一次给药 24 h后, 处死大鼠, 选择结肠病变最严重的部位剪 取 2cm结肠组织, 放入 10%中性缓冲福尔马林溶液中固定, 常规石蜡包埋, 制片, HE染色, 观察大鼠结肠粘膜损伤情况。 根据结肠粘膜损伤轻重程度, 依次定量为 " 1分(少量或轻度) " , "2分(中等量或中度) " , " 3分(大 量或重度) " , "4分 (极重度) " , 极轻度病变计为 "0. 5分" , 无病变 组织计为 "0分" 。 累加所有分数, 得出总分, 计算出每组每只动物的均分 ( ±SD), 分值越低提示病变程度越轻。 2.2数据处理:
对所有数据进行数据处理, 对病理学评分采用秩和检验, 并统计分析结 果。
3.结果
对大鼠三硝基苯磺酸诱导型结肠炎的病理组织学研究表明, 其结肠黏 膜充血水肿、 上皮脱落、 坏死、 溃疡形成、 黏膜下层有大量的炎性细胞浸 润, 某些溃疡可深达肌层、 纤维结缔组织和血管增生明显, 肽 A药物应用后 结肠炎的病变均有不同程度的减轻。 可以看出, 治疗效果由高到低的顺序 依次为肽 A高剂量组, 肽 A中剂量组, 肽 A低剂量组, 与模型组相比均有显著 性差异 〈 0.05或 ** < 0.01)。 按照本实施例记载的病变轻重程度评 分规则, 使用秩和检验方法获得各病理学检查指标的综合评分结果, 如表 所示。 可以看出, 肽 A药物中剂量组的治疗效果与阳性药物 (SASP) 组的效 果相当, 而肽 A低剂量组已经显示出对结肠炎病变的有效干预或治疗。
表 1: 溃疡性结肠炎病变轻重程度评分结果 组 另 IJ 动物数 (只) ~~病变评分 ( ± SD ) 空白对照组 10 1. 33±0.65** 模型组 10 6.86±1.57
阳性药 SASP组 10 4.15±1.68*
肽 A药物低剂量 10 4.37±1.76*
肽 A药物中剂量 10 4.10±1.15*
肽 A药物高剂量 10 3.43 ±1.66**
与模型组比较: * < 0.05, ** < 0.01

Claims

权 利 要 求
1、 如式 I所示的肽或其衍生物在制备预防或治疗结肠炎的药物中的应用:
Xaa 1 -G 1 n-Xaa2-Xaa3-Thr-S er~G 1 y-Xaa4 (式 I ) 其中,
Xaal为缺失、 Ala、 Gly、 Val、 Leu或 l ie,
Xaa2为 Thr或 Ser,
Xaa3为 Tyr、 Phe或 Trp, 而且
Xaa4为缺失、 Ala、 Gly、 Val、 Leu、 l ie或 Pro;
所述衍生物包括所述肽在药学上可接受的盐或酯。
2、 根据权利要求 1所述的应用, 其中所述肽或其衍生物为式 II所示的肽或 其药学上可接受的盐或酯:
G 1 y-Gl n-Thr-Ty r-Thr-S er~G 1 y (式 。
3、 根据权利要求 1或 2所述的应用, 其中所述药物为单位制剂。
4、 根据权利要求 1或 3所述的应用, 所述药物为注射制剂。
5、 根据权利要求 1或 2所述的应用, 其中所述结肠炎是溃疡性结肠炎。
6、 根据权利要求 5所述的应用, 所述溃疡性结肠炎为由三硝基苯磺酸诱导 产生的结肠炎。
7、 一种治疗结肠炎的方法, 包括, 向患者施用含有治疗有效量的式 I所示 的肽或其衍生物的药物:
Xaa 1 -G 1 n-Xaa2-Xaa3-Thr-S er-G 1 y-Xaa4 (式 I ) 其中,
Xaal为缺失、 Ala、 Gly、 Val、 Leu或 l ie,
Xaa2为 Thr或 Ser,
Xaa3为 Tyr、 Phe或 Trp, 而且
Xaa4为缺失、 Ala、 Gly、 Val、 Leu、 l ie或 Pro;
所述衍生物包括所述肽在药学上可接受的盐或酯。
8、 根据权利要求 7所述的方法, 所述肽或其衍生物为下式 II所示的肽或其 药学上可接受的盐或酯:
G 1 y-Gl n-Thr-Ty r-Thr-S er~G 1 y (式 。
9、 根据权利要求 7或 8所述的方法, 包括, 向患者施用含有治疗有效量为 180-3000 μ g的所述肽或其衍生物的药物。
10、 根据权利要求 9所述的方法, 包括, 向患者施用含有治疗有效量为 240-1800 μ g的所述肽或其衍生物的药物。
11、 根据权利要求 7-10任一项所述的方法, 其中, 对患者以单位制剂的剂 量给药。
12、根据权利要求 11所述的方法,其中所述单位制剂中含有 300-3000 所 述肽或其衍生物。
13、根据权利要求 12所述的方法,其中所述单位制剂中含有 400-1800 所 述肽或其衍生物。
14、 根据权利要求 7-13任一项所述的方法, 其包括以注射方式给药。
15、 根据权利要求 7或 8所述的方法, 其中所述结肠炎是溃疡性结肠炎。
16、 根据权利要求 15所述的应用, 所述溃疡性结肠炎为由三硝基苯磺酸诱 导产生的结肠炎。
PCT/CN2011/080435 2011-09-30 2011-09-30 丙型肝炎病毒免疫原性肽或其衍生物在制备预防或治疗结肠炎的药物中的应用 WO2013044499A1 (zh)

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PCT/CN2011/080435 WO2013044499A1 (zh) 2011-09-30 2011-09-30 丙型肝炎病毒免疫原性肽或其衍生物在制备预防或治疗结肠炎的药物中的应用

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Citations (3)

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Publication number Priority date Publication date Assignee Title
WO2007137456A1 (fr) * 2006-06-01 2007-12-06 Yun Cheng Peptide pour la prévention ou le traitement d'atteinte hépatique et son dérivé ainsi que son utilisation
WO2009127140A1 (zh) * 2008-04-18 2009-10-22 Cheng Yun 7p及其衍生肽和其应用
CN101822816A (zh) * 2010-05-27 2010-09-08 程云 7p肽在预防或治疗肺炎中的应用

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WO2007137456A1 (fr) * 2006-06-01 2007-12-06 Yun Cheng Peptide pour la prévention ou le traitement d'atteinte hépatique et son dérivé ainsi que son utilisation
WO2009127140A1 (zh) * 2008-04-18 2009-10-22 Cheng Yun 7p及其衍生肽和其应用
CN101822816A (zh) * 2010-05-27 2010-09-08 程云 7p肽在预防或治疗肺炎中的应用

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