WO2013166944A1 - 一种rtn4b相关多肽及其制备与应用 - Google Patents

一种rtn4b相关多肽及其制备与应用 Download PDF

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WO2013166944A1
WO2013166944A1 PCT/CN2013/075186 CN2013075186W WO2013166944A1 WO 2013166944 A1 WO2013166944 A1 WO 2013166944A1 CN 2013075186 W CN2013075186 W CN 2013075186W WO 2013166944 A1 WO2013166944 A1 WO 2013166944A1
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rtn4b
related polypeptide
preparation
tumor
polypeptide
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French (fr)
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余龙
唐丽莎
季国庆
吴燕华
韩丁丁
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复旦大学
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    • 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
    • C07K14/46Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates
    • C07K14/47Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates from mammals
    • 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
    • A61P35/00Antineoplastic agents
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P7/00Drugs for disorders of the blood or the extracellular fluid
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K38/00Medicinal preparations containing peptides

Definitions

  • the invention relates to the field of biotechnology, and particularly relates to an RTN4B related polypeptide and preparation and application thereof. Background technique
  • RTN4B belongs to the reticolon family (RTNs) and is named for its special endoplasmic reticulum site, with a conserved RHD structure (reticulon-homology domain).
  • the family contains four genes, RTN1, RTN2, RTN3 and RTN4, of which there are many reports on RTN4.
  • the RTN4 (also known as Nogo/ASY/RTN-X) gene has multiple alternative splicing vectors, mainly encoding RTN4A (GenBank accession number AF148537), RTN4B (GenBank accession number AF148538) and B RTN4C (GenBank accession number AF087901) three proteins. Other splices are specifically expressed in the testes [Oertle T, Schwab ME. Nogo and its paRTNers. Trends Cell Biol. 2003 Apr; 13(4): 187-94.].
  • RTN4B is widely expressed in all normal tissues except the liver, and previous studies have suggested that RTN4B is involved in the regulation of apoptosis and tumor growth.
  • Tsujimoto et al. found that RTN4B interacts with Bcl-2 and Bcl-xL and recruits Bcl-XL and Bcl-2 to the endoplasmic reticulum, reversing the apoptosis inhibition of Bcl-XL and Bcl-2 [Tagami S, Eguchi Y , Kinoshita M, Takeda M, Tsujimoto Y.
  • RTN-XS A novel protein, RTN-XS, interacts with both Bcl-XL and Bcl-2 on endoplasmic reticulum and reduces their anti-apoptotic activity. Oncogene. 2000 Nov 23; 19(50): 5736-46.]. Yutsudo et al. found that RTN4B showed transcriptional repression in samples of small cell lung cancer, and overexpression of RTN4B significantly promoted apoptosis of tumor cells [Li Q, Qi B, Oka K, Shimakage M, Yoshioka N, Inoue H, Hakura A, Kodama K, Stanbridge EJ, Yutsudo M. Link of a new type of
  • RTN4B is in mammalian vascular endothelium. Both cells and smooth muscle cells are expressed. RTN4B recombinant protein can promote the migration of vascular endothelial cells and inhibit the migration of smooth muscle cells.
  • RTN4A/B knockout mice abnormally thickened blood vessel walls appeared after vascular injury, and the lumen of the blood vessels was shrunk. RTN4B was reintroduced into the mouse by an adenovirus vector, and the abnormally thickened blood vessel wall was restored. Normal form [Acevedo L, Yu J, Erdjument-Bromage H, Miao RQ, Kim JE, Fulton D, Tempst P, Strittmatter SM, Sessa WC.
  • Miao et al. screened the receptor molecule NgBR of RTN4B on the surface of vascular endothelial cells [Miao RQ, Gao Y, Harrison KD, Prendergast J, Acevedo LM, Yu J, Hu F, Strittmatter SM, Sessa WC. Identification of a receptor Necessary for Nogo-B stimulated chemotaxis and
  • the applicant of the present invention first cloned the human R7 W gene, and carried out in-depth functional analysis of RTN4B expressed by tumor cells in the preliminary research work, and has applied for a patent "a human protein and coding sequence, and its preparation method and Use "[Announcement No.: CN 1137383C], which relates to the synthesis of RTN4B protein and its application in a liver cancer diagnostic kit.
  • RTN4B The correlation of RTN4B with tumors has been reported in several studies and confirmed by previous studies by the inventors of the present invention.
  • the expression changes of RTN4B are not only closely related to tumorigenesis, but RTN4B can participate in the regulation of tumor growth: overexpression of RTN4B can promote the growth of tumor cells in vivo, while RTN4B can inhibit the growth of tumor cells in vivo.
  • an RTN4B-related polypeptide comprising the amino acid sequence set forth in SEQ ID NO: 0.1 or a conservative variant polypeptide thereof is disclosed.
  • SEQ ID NO: 1 RRGSS.
  • the RTN4B-related polypeptide of the present invention may be a synthetic polypeptide or a recombinant polypeptide.
  • the RTN4B-related polypeptide of the invention may be a modified or unmodified polypeptide.
  • the modification refers to the modification of the protein at the molecular level, usually without changing the primary structure. That is, in vitro, the side chain group of the protein is covalently linked with some natural or synthetic groups, especially macromolecules with biocompatibility, by artificial methods, thereby changing the properties of the protein, such as improving its antiproteolytic properties. Optimized solubility, increased half-life, or easier purification. Specifically, these modifications may be glycosylation, PEGylation, tag antibodies, and the like.
  • the tag antibody refers to a specific region or group in the antigen molecule that determines the specificity of the antigen, and is a structure or sequence that specifically binds to the antibody. It can be used in DNA recombination technology to construct a fusion protein comprising a gene of interest and an epitope tag, which is then identified and purified by a specific tag antibody to meet the research needs. Commonly used tag antibodies include, but are not limited to: myc, HA, Flag, His, GST, and the like. It has been experimentally confirmed that the RTN4B-related polypeptide of the present invention can inhibit the biological activity of RTN4B in vitro. The RTN4B-related polypeptide can inhibit the biological activity of RTN4B in vitro, which means that the RTN4B-related polypeptide has the ability to inhibit RTN4B regulation of cell adhesion in vitro.
  • amino acid sequence of the RTN4B-related polypeptide is SEQ ID NO.
  • the RTN4B-related polypeptide of the present invention may be a linear polypeptide or a cyclic peptide.
  • a method of producing the RTN4B-related polypeptide comprising obtaining a linear polypeptide of the RTN4B-related polypeptide by chemical synthesis.
  • the linear polypeptide After obtaining the linear polypeptide, the linear polypeptide can be further cyclized end to end to obtain a cyclic peptide.
  • a solid phase resin carrier and an amino acid are used as materials to synthesize a polypeptide chain by a condensation reaction of a peptide bond, which comprises the steps of:
  • cycling step b sequentially links the amino acids in the sequence until it extends to the amino terminus of the peptide chain; (d) cleavage of the peptide chain from the solid support and removal of the side chain protecting group, and purification to obtain a linear polypeptide.
  • the step d is: cutting the peptide chain from the solid phase carrier, removing the side chain protecting group after cyclization, and purifying to obtain the cyclic peptide.
  • the RTN4B-related polypeptides of the invention can also be produced from prokaryotic or eukaryotic hosts using recombinant techniques.
  • an isolated polynucleotide comprising a nucleotide sequence selected from the group consisting of: (a) a polynucleotide encoding the RTN4B-related polypeptide; a polynucleotide that is complementary to the polynucleotide (a).
  • the polynucleotide of the present invention may be in the form of DNA or the form of R A .
  • DNA can be single-stranded or double-stranded.
  • the polynucleotide of the present invention can be used to construct a recombinant expression vector expressing the RNT4B-related polypeptide of the present invention.
  • Recombinant expression vectors refer to bacterial plasmids, phage, yeast plasmids, plant cell viruses, mammalian cell viruses such as adenoviruses, retroviruses or other vectors well known in the art.
  • Vectors suitable for use in the present invention include, but are not limited to, T7-based expression vectors expressed in bacteria (Rosenberg, et al. Gene, 1987, 56.125); pMSXND expression vectors expressed in mammalian cells (Lee and Nathans, J Bio Chem.
  • any plasmid and vector can be used as long as it can replicate and stabilize within the host.
  • An important feature of expression vectors is that they usually contain an origin of replication, a promoter, a marker gene, and a translational control element.
  • the coding sequence of the tag antibody may be further increased at one end of the RTN4B-related polypeptide-encoding gene to facilitate purification when constructing the recombinant expression vector.
  • RTN4B-related polypeptide for the preparation of a medicament or preparation for inhibiting the biological activity of RTN4B is disclosed.
  • the drug or preparation for inhibiting the biological activity of RTN4B is a drug or preparation for inhibiting the ability of RTN4B to regulate cell adhesion.
  • RTN4B Various functions of RTN4B have been reported in the prior art, such as apoptosis of tumor cells, vascular remodeling, angiogenesis, adhesion, migration, and the like.
  • the RTN4B-related polypeptide of the present invention can inhibit the biological activity of RTN4B, which means its potential medicinal value.
  • the use of the RTN4B-related polypeptide for the preparation of a medicament for treating or preventing a tumor is disclosed.
  • the inhibition of the liver cancer by the RTN4B-related polypeptide of the present invention is specifically enumerated.
  • the RTN4B-related polypeptide of the present invention is expected to be an anticancer drug.
  • the method of the examples is to inhibit the growth of axillary tumor cell xenografts by intraperitoneal injection of the polypeptide.
  • a method of treating or preventing a tumor comprises administering the R T4B -related polypeptide to a subject.
  • the tumor is selected from tumors whose growth or proliferation is associated with the expression or activity of the RNT4B protein.
  • the tumor is liver cancer.
  • the use of the RTN4B-related polypeptide for the preparation of a medicament or preparation for inhibiting adhesion of vascular endothelial cells is disclosed.
  • the method inhibits the adhesion of tumor cells to the surface of RTN4B by incubating the polypeptide with the tumor cells, comprising the steps of: (a) incubating the vascular endothelial cells with the polypeptide; (b) RTN4B protein coated cell culture dishes; (c) Inoculate vascular endothelial cells into culture dishes; (d) Detect the proportion of vascular endothelial cells adhering to the surface of RTN4B within 1 hour [Technical Reference: Gonzalez AM, Gonzales M, Herron GS, Nagavarapu U, Hopkinson SB, Tsuruta D, Jones JC. Complex interactions between the laminin alpha 4 subunit and integrins regulate endothelial cell behavior in vitro and angiogenesis in vivo. Proc Natl Acad Sci U SA. 2002 Dec
  • a medicament or formulation is disclosed, the active ingredient of which comprises the RTN4B-related polypeptide.
  • the drug may be a drug or preparation for inhibiting the biological activity of RTN4B; or a drug for treating or preventing a tumor; or a drug or preparation for inhibiting adhesion of vascular endothelial cells.
  • compositions may also include pharmaceutical excipients.
  • the pharmaceutical excipient is added to the prescription in order to solve the formulation-related problems, such as moldability, effectiveness, stability, safety, activity or bioavailability, and acceptable mouthfeel or odor in the case of oral administration.
  • Medicinal materials other than the main drug.
  • Pharmaceutical excipients can be in a variety of carriers, diluents, fillers, binders and other excipients depending upon the mode of administration and the dosage form employed.
  • Various preservatives, lubricants, dispersing agents, flavoring agents, moisturizers, antioxidants, sweeteners, colorants, and stabilizers may also be added.
  • the pharmaceutical excipients may include, but are not limited to, sugars (eg, lactose, glucose, sucrose), starch (such as corn starch and potato starch), cellulose and derivatives thereof (such as sodium methicone sodium, Ethylcellulose, methylcellulose, microcrystalline cellulose), tragacanth powder, malt, gelatin, talc, solid lubricants (such as stearic acid and magnesium stearate), calcium sulfate, vegetable oils (such as peanut oil) , cottonseed oil, sesame oil, olive oil, corn oil and cocoa butter), waxes, fats, alcohols, polyols (such as propylene glycol, glycerol, sorbitol, mannitol and polyethylene glycol), polyvinylpyrrolidone, alginic acid, Emulsifiers (such as T ween ), wetting agents (such as sodium lauryl sulfate), coloring agents, flavoring agents (such as sweeteners), sweet
  • a pharmaceutically acceptable excipient when selected, it should be selected to be compatible with the RTN4B-related polypeptide of the present invention, i.e., an excipient which can be blended therewith without substantially reducing the effect of the pharmaceutical composition under normal circumstances.
  • the medicament or preparation of the present invention may be a tablet, a pill, a powder, a solution, a syrup, a sterile injectable solution or the like.
  • the pharmaceutical composition of the present invention can be prepared in the form of an injection, for example, by a conventional method using physiological saline or an aqueous solution containing glucose and other adjuvants.
  • Pharmaceutical compositions such as tablets and capsules can be prepared by conventional methods.
  • the drug should be manufactured under aseptic conditions.
  • the formulated drug or formulation can be administered by conventional routes including, but not limited to, intramuscular, intraperitoneal, intravenous, subcutaneous, intradermal, or topical administration.
  • a drug is used, a safe and effective amount of the fusion protein of the present invention or an antibody thereof is administered to a subject.
  • about 50 micrograms per kilogram of body weight per day is about 500 milligrams per kilogram of body weight.
  • the polypeptides of the invention may also be used with other therapeutic agents.
  • the present invention designs a short peptide molecule targeting RTN4B based on the biological activity and action pathway of RTN4B. It has been proved by experiments that the RTN4B-related polypeptide of the present invention can inhibit the biological activity of RTN4B, inhibit the adhesion of vascular endothelial cells, inhibit the growth of tumor cells in vivo, thereby realizing the control of tumor growth, and has been developed into an anticancer drug. potential.
  • P4+PBS Timing port RTN4B-P4 and control PBS ⁇ L
  • P4+138 Addition of RTN4B-P4 and the pore of the polypeptide of the present invention.
  • cR GSS the cyclic peptide group of the present invention
  • the short peptide is obtained by the solid phase synthesis method of the present invention, it is purified by HPLC technique, and its purity is analyzed by mass spectrometry to obtain a short peptide of high purity.
  • the present invention has applied a short peptide in an in vitro vascular endothelial cell adhesion test, and found that the short peptide can well inhibit the adhesion of vascular endothelial cells.
  • RTN4B research reports and our work have found that RTN4B can promote the adhesion of vascular endothelial cells (such as HUVEC), and it is likely to regulate the activity of vascular endothelial cells in the tumor microenvironment by mediating adhesion, and promote tumor angiogenesis (Fig. 1 ).
  • the short peptide of the present invention was incubated with vascular endothelial cells, the regulation of the adhesion ability of RTN4B to vascular endothelial cells was significantly inhibited (Fig. 2).
  • the experimental methods, detection methods, and preparation methods disclosed in the present invention employ conventional molecular biology, biochemistry, chromatin structure and analysis, analytical chemistry, cell culture, recombinant DNA technology, and related fields. Conventional technology. These techniques are well described in the prior literature. For details, see Sambrook et al. MOLECULAR CLONING: A LABORATORY MANUAL, Second edition, Cold Spring Harbor Laboratory Press, 1989 and Third edition, 2001; Ausubel et al, CURRENT PROTOCOLS IN MOLECULAR BIOLOGY, John Wiley & Sons, New York, 1987 and periodic updates ; the series METHODS IN
  • SHIMADZU high performance liquid chromatograph (Model: preparative, analytical, software: Class- VP. Sevial System, manufacturer: SHIMADZU);
  • Fmoc-L-Cys(Trt)-OH amino acid was further added with a 10-fold molar excess of DIEA, finally dissolved in DMF and shaken for 30 min.
  • Cutting and removing the side chain protecting group from the resin Preparation of cutting solution (10 mL/g) TFA 94.5%; water 2.5%; EDT 2.5%; TIS 1%, cutting time 120 min. (11) Drying and washing: The lysate was dried as much as possible with nitrogen, washed with diethyl ether six times, and then evaporated at room temperature.
  • Raw materials and related reagents phosphate buffer, trypsin (invitagen), M200 medium and LSGS serum (cascade biologies), bovine serum albumin (Shanghai Shenggong Bioengineering Technology Service Co., Ltd.), MTS/PMS kit ( Promega), human HUVEC cells (ScienCell).
  • RTN4B-P4 protein partial extracellular segment of RTN4B protein disclosed in ZL00111791.2, which has cell-adhesive activity, can be synthesized by peptide), coated with 96-well plate, per well ⁇ 4°C overnight. After washing the PBS for the next day, 1% BSA was added for blocking, 150 ⁇ per well. After being placed at 37 °C for 1 h, it can be used for cell inoculation after washing once with pre-warmed serum-free medium.
  • RTN4B-P4 protein amino acid sequence (SEQ ID NO: 2):
  • the RTN4B-P4 protein was prepared by peptide synthesis.
  • Blocking binding The diluted cell suspension was incubated with the linear polypeptide prepared in Example 1 at 37 ° C for 30 min at a working concentration of 20 mM, and then the cell suspension was inoculated into a 96-well plate at 100 L per well. .
  • the control group was added with the same volume of PBS.
  • Example 3 Application of the polypeptide of the present invention in cell growth in vivo
  • Raw materials and related reagents phosphate buffer, trypsin (invitragen), DMEM medium and fetal bovine serum (Gibco), 3-4 weeks old nude mice (Shanghai Slack), tumor cell line SMMC-7721, etc.
  • Equipment Cell culture incubator (Heraeus), inverted microscope (Leica), horizontal centrifuge (Eppendorf centrifuge), SPF animal room.
  • the cyclic peptide was diluted with PBS, and configured to mother liquor 5m g mL / value was adjusted to 7.4.
  • the cell suspension was inoculated subcutaneously into nude mice, 200 uL per mouse, for a total of 40 mice.
  • mice were equally divided into 4 groups, and intratumoral polypeptide injection was performed, and each mouse was continuously injected for 13 days at 200 uL o.
  • Blank control equal volume of PBS.
  • Control loop peptide group cRDfV, prepared by polypeptide synthesis and prepared by referring to the cyclization method of Example 1.
  • Test Cyclic Peptide Group The cyclic peptide prepared in Example 1 was used.
  • Tumor recording The tumor size was measured every two days, and the tumor size was calculated according to axb 2 .

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Abstract

本发明涉及一种RTN4B相关多肽及其制备与应用。本发明的RTN4B相关多肽,含有SEQ ID NO.1所示的氨基酸序列。本发明还进一步公开了所述RTN4B相关多肽基于化学合成法的制备方法及所述RTN4B相关多肽的用途。本发明的RTN4B相关多肽能够在体外抑制RTN4B的生物学活性,在体内抑制肿瘤细胞的生长。

Description

一种 RTN4B相关多肽及其制备与应用
技术领域
本发明涉及生物技术领域, 具体涉及一种 RTN4B相关多肽及其制备与应用。 背景技术
RTN4B属于 reticolon家族 (RTNs), 因含有特殊的内质网定位而得名, 具有 保守的 RHD结构框 (reticulon-homology domain )。 该家族含有四个基因, RTN1、 RTN2、 RTN3和 RTN4, 其中关于 RTN4的研究报道较多。 RTN4 (又名 Nogo/ ASY/RTN-X) 基因有多个可变剪接本, 主要编码 RTN4A ( GenBank登录号 AF148537 ) , RTN4B ( GenBank登录号 AF148538 )禾 B RTN4C ( GenBank登录号 AF087901 )三种蛋白,其它一些剪接本多在睾丸中特异性表达 [Oertle T, Schwab ME. Nogo and its paRTNers. Trends Cell Biol. 2003 Apr; 13(4): 187-94.]。
RTN4B在除了肝脏以外的其他所有正常组织中广谱表达, 前人的研究工作提 示 RTN4B参与调控细胞凋亡和肿瘤生长。 Tsujimoto等人发现 RTN4B能够和 Bcl-2, Bcl-xL相互作用并将 Bcl-XL及 Bcl-2招募到内质网上, 逆转 Bcl-XL及 Bcl-2的凋 亡抑制作用 [Tagami S, Eguchi Y, Kinoshita M, Takeda M, Tsujimoto Y. A novel protein, RTN-XS, interacts with both Bcl-XL and Bcl-2 on endoplasmic reticulum and reduces their anti-apoptotic activity. Oncogene. 2000 Nov 23; 19(50):5736-46.]。 Yutsudo 等人发现 RTN4B在小细胞肺癌的样本中出现转录抑制, 而过量表达 RTN4B可以 显著促进肿瘤细胞的凋亡 [Li Q, Qi B, Oka K, Shimakage M, Yoshioka N, Inoue H, Hakura A, Kodama K, Stanbridge EJ, Yutsudo M. Link of a new type of
apoptosis-inducing gene ASY/Nogo-B to human cancer. Oncogene. 2001 Jul
5;20(30):3929-36 但是, Schwab小组指出 RTN4B的表达在很多肿瘤组织来源的 EST数据库中都有支持, 而且 RTN4B在 SaOS-2或 CHO细胞中没有促进细胞凋亡 的迹象 [Oertle T, Merkler D, Schwab ME. Do cancer cells die because of Nogo-B? Oncogene. 2003 Mar 6;22(9): 1390-9.] 因此, RTN4B调控肿瘤生长的机制是否与细 胞凋亡有关还尚无定论。 但是, 近年来的研究进一步发现 RTN4B很可能与血管重 建、 甚至血管新生有关。 2004年, Acevedo等人发现 RTN4B在哺乳动物血管内皮 细胞和平滑肌细胞中都有表达。 RTN4B重组蛋白可以促进血管内皮细胞的迁移并 抑制平滑肌细胞的迁移。 RTN4A/B基因敲除小鼠在血管损伤后出现了异常加厚的 血管壁, 血管内腔縮小, 通过腺病毒载体将 RTN4B重新导入到小鼠体内, 这种异 常增厚的血管壁又能够恢复正常的形态 [Acevedo L, Yu J, Erdjument-Bromage H, Miao RQ, Kim JE, Fulton D, Tempst P, Strittmatter SM, Sessa WC. A new role for Nogo as a regulator of vascular remodeling. Nat Med. 2004 Apr; 10(4) :382-8.]。 随后, Miao 等人筛选到了 RTN4B在血管内皮细胞表面的受体分子 NgBR [Miao RQ, Gao Y, Harrison KD, Prendergast J, Acevedo LM, Yu J, Hu F, Strittmatter SM, Sessa WC. Identification of a receptor necessary for Nogo-B stimulated chemotaxis and
morphogenesis of endothelial cells. Proc Natl Acad Sci U SA. 2006 Jul
18; 103(29): 10997-1002 敲减实验证明 RTN4B和 NgBR之间的相互作用是 VEGF 血管源性分子诱导血管新生所必需的。 在斑马鱼模式生物中发现, RTN4B-NgBR 的相互作用能够通过激活细胞内的 Akt通路调控血管新生 [Zhao B, Chun C, Liu Z, Horswill MA, Pramanik K, Wilkinson GA, Ramchandran R, Miao RQ. Nogo-B receptor is essential for angiogenesis in zebrafish via Akt pathway. Blood. 2010 Dec
9; 116(24):5423-33.]。
本发明的申请人最早克隆了人 R7 W基因,并在前期的研究工作中对肿瘤细胞 表达的 RTN4B进行了深入的功能分析, 已经申请专利 "一种人蛋白和编码序列、 及其制法和用途" [授权公告号: CN 1137383C] , 其中涉及到了 RTN4B蛋白的合成 及其在肝癌诊断试剂盒中的应用。
RTN4B与肿瘤的相关性已在多篇研究中报道, 并为本发明的发明人的前期研 究工作所证实。 RTN4B的表达变化不仅与肿瘤发生发展密切相关, 且 RTN4B可以 参与调节肿瘤生长:过量表达 RTN4B可以促进肿瘤细胞在体内生长,而消减 RTN4B 可以抑制肿瘤细胞在体内的生长。
但是, 关于 RTN4B如何调节肿瘤生长, 利用 R T4B作为分子靶标如何实现 肿瘤生长抑制的作用仍是亟待解决的科学问题。 本领域迫切需要在深入阐述 RTN4B调节肿瘤生长的机制的基础上, 以 RTN4B为分子靶标, 探索新颖有效的抗 肿瘤药物。 发明内容 本发明的目的是公开一种 RTN4B相关多肽及其制备与应用。
本发明第一方面, 公开了一种 RTN4B相关多肽, 其含有 SEQ ID N0.1所示的 氨基酸序列或其保守性变异多肽。
SEQ ID NO:l : RRGSS。
本发明的 RTN4B相关多肽可以是合成多肽或重组多肽。
本发明的 RTN4B相关多肽可以是经修饰的或未经修饰的多肽。 所述修饰是指在分子水平上对蛋白质进行改造, 通常不改变一级结构。 即在体 外将蛋白质的侧链基团通过人工方法,与一些天然或合成的基团特别是具有生物相 容性的大分子进行共价连接, 从而改变蛋白质的性质如提高了其抗蛋白水解性能、 优化了溶解性能、 增加半衰期、 或更易于纯化等等。 具体的, 这些修饰可以是糖基 化、 PEG化、 标签抗体等。 所述标签抗体是指是抗原分子中决定抗原特异性的特殊区域或基团,是与抗体 特异性结合的结构或序列。 可用于 DNA重组技术构建包含目的基因以及表位标记 的融合蛋白, 进而通过特异性标签抗体对其鉴定与纯化, 以达到研究的需求。 常用 的标签抗体包括但不限于: myc、 HA、 Flag、 His、 GST等。 经试验证实, 本发明的 RTN4B相关多肽能体外抑制 RTN4B的生物学活性。 所述 RTN4B相关多肽能体外抑制 RTN4B的生物学活性是指 RTN4B相关多肽 具有体外抑制 RTN4B调节细胞黏附能力。
较优的, 所述 RTN4B相关多肽的氨基酸序列为 SEQ ID NO.l。
本发明的 RTN4B相关多肽可以为线性多肽或环肽。
本发明第二方面, 公开了所述 RTN4B相关多肽的制备方法, 包括采用化学合 成法获得所述 RTN4B相关多肽的线性多肽。
获得线性多肽后, 还可进一步将所述线性多肽首尾环化获得环肽。
在本发明的一个实施案例中, 是以固相树脂载体、 氨基酸为材料, 利用肽键的 縮合反应人工合成多肽链, 它包括步骤:
(a)将肽链的羧基端氨基酸首先共价连接到固相载体上;
(b)经过脱氨基保护基,与过量的活化羧基的下一个氨基酸縮合反应,从而延长 肽链;
(c)循环步骤 b依次连接序列中的氨基酸直至延长到肽链氨基末端; (d) 从固相载体上切割肽链并脱去侧链保护基, 经纯化获得线性多肽。
上述各步骤所采用的条件和试剂均为多肽合成中的常规。
进一步的, 在制备环肽时, 所述步骤 d为: 从固相载体上切割肽链, 环化后脱 去侧链保护基, 经纯化获得环肽。
本发明的 RTN4B相关多肽也可以采用重组技术从原核或真核宿主中产生。 本发明第三方面, 公开了一种分离的多核苷酸, 它包含一核苷酸序列, 该核苷 酸序列选自下组: (a)编码所述 RTN4B相关多肽的多核苷酸; (b )与多核苷酸(a) 互补的多核苷酸。
本发明的多核苷酸可以是 DNA形式或 R A形式。 DNA可以是单链的或是双 链的。
本发明的多核苷酸可用于构建表达本发明的 RNT4B相关多肽的重组表达载体。 重组表达载体指本领域熟知的细菌质粒、 噬菌体、 酵母质粒、 植物细胞病毒、 哺乳 动物细胞病毒如腺病毒、逆转录病毒或其他载体。在本发明中适用的载体包括但不 限于:在细菌中表达的基于 T7的表达载体 (Rosenberg, et al. Gene, 1987,56.125);在哺 乳动物细胞中表达的 pMSXND表达载体 (Lee and Nathans, J Bio Chem.
263 :3521 ,1988)和在昆虫细胞中表达的来源于杆状病毒的载体。 总之, 只要能在宿 主体内复制和稳定, 任何质粒和载体都可以用。表达载体的一个重要特征是通常含 有复制起点、 启动子、 标记基因和翻译控制元件。 为了方便重组表达载体的纯化, 还可以进一步在构建重组表达载体时, 在 RTN4B相关多肽编码基因的一端增加标 签抗体的编码序列以方便纯化。
本发明第四方面,公开了所述 RTN4B相关多肽在制备抑制 RTN4B的生物学活 性的药物或制剂中的用途。
进一步的,所述抑制 RTN4B的生物学活性的药物或制剂为抑制 RTN4B调节细 胞黏附能力的药物或制剂。
现有技术已报道了 RTN4B的多种功能, 如与肿瘤细胞的凋亡、 血管重建、 血 管新生、 黏附、 迁移等相关。 本发明所述的 RTN4B相关多肽可以抑制 RTN4B的 生物学活性, 意味着其潜在的药用价值。
本发明第五方面, 公开了所述 RTN4B相关多肽在制备治疗或预防肿瘤的药物 中的用途。
在本发明的一个实施例中, 具体列举了本发明的 RTN4B相关多肽对肝癌的抑 制作用, 这意味着本发明的 RTN4B相关多肽有望成为抗癌药物。 实施例的方法是 通过腹腔注射多肽, 抑制腋下肿瘤细胞移植瘤的生长。它包括步骤: (a)将肿瘤细胞 移植到裸鼠腋下; (b)通过腹腔给药的方式将多肽注入裸鼠体内; (c)记录裸鼠移植 瘤的生长速率并通过免疫组化分析瘤体内的细胞生长和血管生长状况 [技术参考: Yamada S, Bu XY, K ankaldyyan V, Gonzales-Gomez I, McComb JG, Laug WE. Effect of the angiogenesis inhibitor Cilengitide (EMD 121974) on glioblastoma growth in nude mice. Neurosurgery. 2006 Dec;59(6): 1304-12]。 结果证实本发明的 RTN4B相关多肽 能够通过抑制血管内皮细胞黏附的能力实现肿瘤生长抑制。
本发明第五方面, 还公开了一种治疗或预防肿瘤的方法, 为向对象施用所述 R T4B相关多肽。
所述肿瘤选自其生长或增殖与 RNT4B蛋白的表达或活性相关的肿瘤。
进一步的, 所述肿瘤为肝癌。
本发明第六方面, 公开了所述 RTN4B相关多肽在制备抑制血管内皮细胞黏附 的药物或制剂中的应用。
在本发明的一个实施例中, 该方法是通过将多肽与肿瘤细胞孵育后, 抑制肿瘤 细胞在 RTN4B表面的黏附能力, 它包括步骤: (a)将血管内皮细胞与多肽孵育; (b) 用 RTN4B蛋白包被细胞培养皿; (c)将血管内皮细胞接种到培养皿中; (d)检测 1小 时内血管内皮细胞在 RTN4B表面黏附的比例 [技术参考: Gonzalez AM, Gonzales M, Herron GS, Nagavarapu U, Hopkinson SB, Tsuruta D, Jones JC. Complex interactions between the laminin alpha 4 subunit and integrins regulate endothelial cell behavior in vitro and angiogenesis in vivo. Proc Natl Acad Sci U SA. 2002 Dec
10;99(25): 16075-80.]
本发明第七方面, 公开了一种药物或制剂, 其活性成分含有所述 RTN4B相关 多肽。
所述药物可为用于抑制 RTN4B的生物学活性作用的药物或制剂; 或者为, 用 于治疗或预防肿瘤的药物; 或者为, 用于抑制血管内皮细胞黏附的药物或制剂。
所述药物或制剂中, 还可包括药用辅料。
所述药用辅料是为解决制剂的成型性、 有效性、 稳定性、 安全性、 提高活性或 生物有效性、在口服的情况下产生可接受的口感或气味等制剂相关问题而加入处方 中除主药以外的药用物料。 药用辅料可以是各种载体、 稀释剂、 填充剂、 结合剂及其它赋形剂, 这依赖于 给药方式及所设计的剂量形式。 各种防腐剂、 润滑剂、 分散剂、 矫味剂、 保湿剂、 抗氧化剂、 甜味剂、 着色剂、 稳定剂也可加入其中。 具体的, 所述药用辅料可包括 但不限于糖类(如: 乳糖、 葡萄糖、 蔗糖)、 淀粉(如玉米淀粉和土豆淀)、 纤维素 及其衍生物 (如狡甲基纤维素钠、 乙基纤维素、 甲基纤维素、 微晶纤维素)、 西黄 蓍胶粉末、 麦芽、 明胶、 滑石、 固体润滑剂 (如硬脂酸和硬脂酸镁)、 硫酸钙、 植 物油 (如花生油、 棉籽油、 芝麻油、 橄榄油、 玉米油和可可油)、 蜡、 脂肪、 乙醇、 多元醇 (如丙二醇、 甘油、 山梨糖醇、 甘露糖醇和聚乙二醇)、 聚乙烯吡咯烷酮、 海藻酸、 乳化剂 (如 Tween)、 润湿剂 (如月桂基硫酸钠)、 着色剂、 调味剂 (如甜 味剂)、压片剂、稳定剂、抗氧化剂、防腐剂 (如羟基苯甲酸甲酯和丙酯)、无热原水、 等渗盐溶液、 缓冲液 (如磷酸盐缓冲液) 中的一种或多种的组合。
选用药用辅料时, 应当选择与本发明的 RTN4B相关多肽相容, 即能与其共混 而不会在通常情况下大幅度降低药物组合物的效果的辅料。
本发明的药物或制剂可以是片剂、 丸剂、 粉剂、 溶液剂、 糖浆剂、 灭菌注射溶 液等。本发明的药物组合物可以被制成针剂形式, 例如用生理盐水或含有葡萄糖和 其他辅剂的水溶液通过常规方法进行制备。诸如片剂和胶囊之类的药物组合物, 可 通过常规方法进行制备。 药物宜在无菌条件下制造。
配制好的药物或制剂可以通过常规途径进行给药, 其中包括 (但并不限于): 肌 内、 腹膜内、 静脉内、 皮下、 皮内、 或局部给药。 使用药物时, 是将安全有效量的 本发明融合蛋白或其抗体施用于对象。例如每天约 50微克 /千克体重一约 500毫克 /千克体重。 此外, 本发明的多肽还可与其他治疗剂一起使用。
本发明根据 RTN4B的生物学活性及作用途径设计了靶向 RTN4B的短肽分子。 经试验证明, 本发明的 RTN4B相关多肽能够在体外抑制 RTN4B的生物学活性、 抑制血管内皮细胞黏附,在体内抑制肿瘤细胞的生长,从而实现对肿瘤生长的控制, 具有被开发成抗癌药物的潜力。 附图说明
图 1 多肽对 RTN4B调节细胞黏附能力的抑制作用试验。
纵坐标: 相对细胞黏附率
横坐标: NT: BSA对照孔
P4+PBS: 添力口 RTN4B-P4及对照 PBS的孑 L
P4+138: 添加 RTN4B-P4及本发明多肽的孔 图 2 多肽对肿瘤细胞生长抑制作用试验。
横坐标:
cRDfV: 对照环肽 cRDfV组
cRGDfV: 阳性对照 cRGDfV组
cR GSS: 本发明环肽组
具体实施方式
本发明通过固相合成的方法获得所述短肽时, 利用 HPLC技术进行纯化, 并利 用质谱分析其纯度, 获得了高纯度的短肽。
本发明在体外血管内皮细胞黏附实验中进行了短肽应用,发现了该短肽能够很 好地抑制血管内皮细胞的黏附。 RTN4B的研究报道和我们的工作均发现 RTN4B能 够促进血管内皮细胞 (如 HUVEC) 的黏附, 并很可能通过介导黏附这一事件调节 肿瘤微环境中血管内皮细胞的活性, 促进肿瘤血管新生 (图 1 )。 利用本发明的短 肽与血管内皮细胞孵育后, RTN4B对血管内皮细胞的黏附能力的调节作用被显著 抑制 (图 2)。 在进一步描述本发明具体实施方式之前, 应理解, 本发明的保护范围不局限于 下述特定的具体实施方案; 还应当理解, 本发明实施例中使用的术语是为了描述特 定的具体实施方案, 而不是为了限制本发明的保护范围。
当实施例给出数值范围时, 应理解, 除非本发明另有说明, 每个数值范围的两 个端点以及两个端点之间任何一个数值均可选用。 除非另外定义, 本发明中使用的 所有技术和科学术语与本技术领域技术人员通常理解的意义相同。除实施例中使用 的具体方法、 设备、 材料外, 根据本技术领域的技术人员对现有技术的掌握及本发 明的记载, 还可以使用与本发明实施例中所述的方法、 设备、材料相似或等同的现 有技术的任何方法、设备和材料来实现本发明。试验中未说明的百分比均为重量百 分比。
除非另外说明, 本发明中所公开的实验方法、 检测方法、 制备方法均采用本 技术领域常规的分子生物学、生物化学、染色质结构和分析、分析化学、细胞培养、 重组 DNA技术及相关领域的常规技术。这些技术在现有文献中已有完善说明,具体 可参见 Sambrook等 MOLECULAR CLONING : A LABORATORY MANUAL, Second edition, Cold Spring Harbor Laboratory Press, 1989 and Third edition, 2001 ; Ausubel等, CURRENT PROTOCOLS IN MOLECULAR BIOLOGY, John Wiley & Sons, New York, 1987 and periodic updates ; the series METHODS IN
ENZYMOLOGY, Academic Press, San Diego ; Wolffe, CHROMATIN STRUCTURE AND FUNCTION, Third edition, Academic Press, San Diego, 1998 ; METHODS IN ENZYMOLOGY, Vol.304, Chromatin (P.M.Wassarman and A.P.Wolffe, eds.), Academic Press, San Diego, 1999 ; 和 METHODS IN MOLECULAR BIOLOGY, Vol.119, Chromatin Protocols(P. B.Becker, ed.)Humana Press, Totowa, 1999等。 实施例 1 本发明多肽的固相合成
合成原料及相关试剂:
(1)保护氨基酸原料: Fmoc-L-Cys(Trt)-OH等 (芴甲氧羰基 -S-三苯甲基 -L-半胱氨 酸) (苏州天马医药集团精细化学品有限公司);
(2)縮合试剂和荧光, 生物素原料: HBTU (苯并三氮唑 -N, N, Ν', Ν' -四甲基脲六 氟磷酸盐) (苏州天马医药集团精细化学品有限公司), ΗΟΒΤ ( 1-羟基苯并三氮 唑) (苏州天马医药集团精细化学品有限公司), DIEA (Ν,Ν-二异丙基乙胺) (国药 集团上海化学试剂公司), FITC (异硫氰酸荧光素) (SIGMA), D-BIOTIN (D-生 物素) (SIGMA);
(3)溶剂: DMF (二甲基甲酰胺) (Dikma), DCM (二氯甲烷) (Dikma), 乙腈 (Fisher);
(4)树脂: 2-chlorotrityl chloride resin(2-氯三苯甲基氯树脂) (天津市南开合成科 技有限公司)
(5)脱保护试剂: 哌啶 (国药集团上海化学试剂公司);
(6)切割试齐 [J: TFA (三氟乙酸)(J.T.Baker), TIS (三异丙基硅烷) (ALDRICH), EDT(1,2-乙二硫醇); (7)氮气 (上海比欧气体工业公司);
(8)无水乙醚(上海试一化学试剂有限公司); (9)精密电子天平 (北京赛多利斯 天平有限公司)。
仪器设备:
(1) SYMPHONY型 12通道多肽合成仪 (型号: SYMPHONY,软件: Version.201 厂家: Protein Techno logies.Inc);
(2) SHIMADZU高效液相色谱仪 (型号:制备型,分析型,软件: Class- VP. Sevial System, 厂商: SHIMADZU);
(3) LABCONCO冻干机 (型号: Freezone. Plus. 6, 厂商: LABCONCO;
(4) 离心机 (上海安亭科学仪器厂 型号: TDL-40B)。
合成过程:
线性多肽的制备:
( 1 )树脂溶涨: 将 2-chlorotrityl chloride resin放入反应管中, 加 DMF(15ml/g), 振 荡 30min。
(2) 接第一个氨基酸: 通过沙芯抽滤掉溶剂, 加入 3倍摩尔过量的
Fmoc-L-Cys(Trt)-OH氨基酸,再加入 10倍摩尔过量的 DIEA,最后加入 DMF溶解, 振荡 30min。
( 3 ) 脱保护: 去掉 DMF, 加 20%哌啶 DMF溶液 (15ml/g), 5min, 去掉再加 20% 哌啶 DMF溶液(15ml/g), 15min。
(4) 检测: 抽掉哌啶溶液, 取十几粒树脂, 用乙醇洗三次, 加入茚三酮, KCN, 苯酚溶液各一滴, 105 °C— 110°C加热 5min, 变深蓝色为阳性反应。
( 5 ) 洗涤: DMF(10ml/g)两次, 甲醇 (10ml/g)两次, DMF(10ml/g)两次。
( 6)縮合: 保护氨基酸 (Fmoc-L-Cys(Trt)-OH)三倍过量, HBTU三倍过量, 均用尽 量少 DMF溶解,加入反应管,立刻加入 NMM(N-甲基吗啉)十倍过量,反应 30min。
( 7) 洗涤: DMF(10ml/g)—次, 甲醇 (10ml/g)两次, DMF(10ml/g)两次。
( 8 ) 重复 2-7步操作, 从右到左依次连接序列中的氨基酸。
( 9)抽干,按照下列方法洗树脂。 DMF(10ml/g)两次,甲醇 (10ml/g)两次, DMF(10ml/g) 两次, DCM(10ml/g)两次, 抽干 10min。
( 10) 从树脂上切割并脱去侧链保护基: 配制切割液 (lOmL/g) TFA 94.5%; 水 2.5%; EDT 2.5%; TIS 1%, 切割时间 120min。 ( 11 ) 吹干洗涤: 将裂解液用氮气尽量吹干, 用乙醚洗六次, 然后常温挥干。
( 12)用 HPLC纯化多肽:将粗肽用纯水或者加少量乙腈溶解,按照下列条件纯化: 泵 A: 0.1%三氟乙酸纯水溶液; 泵 B: 0.1%三氟乙酸纯乙腈溶液; 总流量: l.Oml/min; 体积: 30ul; 波长: 220nm;
梯度: : Time (单位: 分钟) A B
05.00 90% 10% 30.00 20% 80% 30.10 停止
<检测器 A>
柱: Venusi MRC-ODS C18 30x250mm
( 13 ) 最后将纯化后的溶液冻干, 既得到序列为 R GSS的线性多肽成品。 环肽的制备:
步骤 (1 ) - (9), ( 11 ) - ( 14) 与线性多肽制备一致获得序列为 R GSS的环肽成 品, 其中步骤 10采用以下三个步骤替代:
( 101 )从树脂上切割多肽: 配制切割液: TFA 1%; DCM 99%。 切割液用量是每 1 克树脂肽加 10ml的切割液, 反应时间是 2h, 室温密封切割。
( 102) 环化: 切割液用氮气吹干, 加入 HBTU三倍过量, 用尽量少 DMF溶解, 加入反应管, 立刻加入 NMM十倍过量, 反应 30min。
( 103 )脱去侧链保护基: 配制切割液(lOmL/g) TFA 94.5%; 水 2.5%; EDT 2.5%; TIS 1%, 切割时间 120min。
鉴定: 分别取少量的线性多肽及环肽成品, 做 MS的分子量鉴定符合预期, 测序鉴 定, 序列符合预期, HPLC分析纯度为 95%, MS方法鉴定结构符合预期。 实施例 2本发明多肽在体外细胞黏附中的应用
原料及相关试剂: 磷酸缓冲液, 胰酶(invitragen公司), M200培养基及 LSGS 血清 (cascade biologies公司), 牛血清白蛋白 (上海生工生物工程技术服务有限公 司), MTS/PMS试剂盒 (Promega公司), 人 HUVEC细胞 (ScienCell公司)。
仪器设备: 细胞培养箱(Heraeus公司), 倒置显微镜 (Leica公司), 水平离心 机 (Eppendorf离心机), 酶标仪 (Bio-Rad公司)。 实验过程:
( 1 ) 孔板准备: PBS稀释 RTN4B-P4蛋白 (为 ZL00111791.2公开的 RTN4B蛋白 的部分胞外区段, 具有促进细胞黏附的活性, 可经多肽合成), 包被 96孔板, 每孔 ΙΟΟμΙ^ 4°C过夜。 次日 PBS洗涤一遍后, 加入 1%BSA进行封闭, 每孔 150μ 。 37 °C放置 lh, 再用预热的无血清培养基洗涤一遍后可用于细胞接种。
RTN4B-P4蛋白氨基酸序列 (SEQ ID NO :2):
RTN4B-P4蛋白采用多肽合成的方法制备获得。
(2) 细胞接种: 当细胞在培养瓶中增殖至 90%的汇合度时更换成无血清培养基继 续培养 16h后可进行消化收获。 弃去细胞原培养基, 先用数毫升 lxPBS洗涤细胞 一遍, 然后加入 l-2mL胰蛋白酶消化液, 摇晃均匀后弃去消化液, 仅留 0.5 mL左 右于瓶内, 将培养瓶置 37°C培养箱中消化 l-2min左右, 待细胞变圆, 可从瓶壁脱 离时,加入含血清的培养基终止胰酶消化,吹散细胞,转入无菌离心管内, 1000 rpm 离心 5 min。 弃去离心上清后, 用含 0.1% BSA的无血清培养基将细胞调整至 5 l05/mL的密度。
(3 )封阻结合:将稀释后的细胞悬液与实施例 1制备的线性多肽在 37°C孵育 30min, 工作浓度为 20mM, 然后将细胞悬液接种到 96孔板中, 每孔 100 L。 对照组加入 相同体积的 PBS。
(4) 洗板和显色: 细胞接种后 lh, 吸去培养基。 保留三个平行孔作为全细胞孔。 其余各孔用预热的无血清培养剂或 PBS洗涤, 重复洗涤三次直至未黏附细胞被完 全洗去。 剩余细胞用 MTS试剂盒显色计算细胞数。 相对细胞黏附率的计算方法是 实验孔的 OD值除以全细胞孔的 OD值后的商。
试验结果: 如图 1所示, 与对照 NT组相比, RTN4B-P4 (P4+PBS组) 能够促进细 胞黏附。 但是, 当内皮细胞与本发明制备的多肽孵育之后, 内皮细胞在 P4表面的 黏附能力显著下降 (P4+138组)。
结果显示,多肽能够抑制 RTN4B调节细胞黏附能力。由于线性环肽能够抑制 RTN4B 调节细胞黏附能力, 环肽与之序列一致, 因此认为也具有抑制 RTN4B调节细胞黏 附能力。 实施例 3本发明多肽在体内细胞生长中的应用 原料及相关试剂: 磷酸缓冲液, 胰酶(invitragen公司), DMEM培养基和胎牛 血清 (Gibco公司), 3-4周龄的裸鼠 (上海斯莱克公司), 肿瘤细胞株 SMMC-7721 等。 仪器设备: 细胞培养箱(Heraeus公司), 倒置显微镜 (Leica公司), 水平离心 机 (Eppendorf离心机), SPF动物室。
实验过程:
1 . 将环肽用 PBS稀释, 配置成 5mg/mL的母液, 值调整至 7. 4。
2. 伺养裸鼠 (3-4周龄)。
3. 培养 SMMC7721肝癌细胞, 收集细胞, 用无血清培养基重悬至 2*107/mL。
4. 将细胞悬液接种到裸鼠皮下, 每只小鼠 200 uL, 共 40只小鼠。
5. 细胞注射 4天后, 将 40只小鼠等分为 4组, 进行瘤内多肽注射, 每只小鼠 200 uL o 连续注射 13天。
6. 停药后第 3天取瘤。
7. 进行瘤体重量分析, 每组去掉最大及最小值。
空白对照: 等体积的 PBS。
对照环肽组: cRDfV, 采用多肽合成并参考实施例 1的环化方法制备获得。 阳性对照组: cRGDfV (已经进入临床 III期的 RGD环肽, 采用多肽合成并参 考实施例 1的环化方法制备获得。
试验环肽组: 采用实施例 1制备的环肽。
(4) 瘤体记录: 每两天测量一次瘤体大小, 并按照 axb2计算瘤体大小。
(5 ) 最后一次注射后两天取瘤, 瘤体称重并拍照。
结果: 如图 2所示, 和对照环肽相比, cRRGSS (试验环肽组) 禾 B cRGDfV (阳性 对照组)都有抑制瘤体生长的作用, 结果表明, 本发明的环肽能够抑制肿瘤细胞的 生长。 由于本发明的线性肽与之序列一致, 因此认为线性肽也具有抑制肿瘤细胞的 生长的作用。

Claims

权利要求书
1. 一种 RTN4B相关多肽, 含有 SEQ ID NO. 1所示的氨基酸序列或其保守性变 异多肽。
2. 如权利要求 1所述 RTN4B相关多肽,所述 RTN4B相关多肽为环肽或线性多 肽。
3. 如权利要求 1所述 RTN4B相关多肽,其特征在于,所述 RTN4B相关多肽能 体外抑制 RTN4B的生物学活性。
4. 如权利要求 3所述 RTN4B相关多肽,其特征在于,所述 RTN4B相关多肽能 体外抑制 RTN4B的生物学活性是指 RTN4B相关多肽能体外抑制 RTN4B调节 细胞黏附能力。
5. 如权利要求 1-4任一所述 RTN4B相关多肽的制备方法, 包括采用化学合成 法获得所述 RTN4B相关多肽的线性多肽。
6. 如权利要求 5所述 RTN4B相关多肽的制备方法, 其特征在于, 还包括将所 述线性多肽首尾环化获得环肽。
7. 如权利要求 5所述 RTN4B相关多肽的制备方法, 其特征在于, 包括下列步 骤:
(a)将肽链的羧基端氨基酸首先共价连接到固相载体上;
(b)经过脱氨基保护基, 与过量的活化羧基的下一个氨基酸縮合反应, 从而 延长肽链;
(c)循环步骤 b依次连接序列中的氨基酸直至延长到肽链氨基末端;
(d) 从固相载体上切割肽链并脱去侧链保护基, 经纯化获得线性多肽。
8. 如权利要求 7所述 RTN4B相关多肽的制备方法, 其特征在于, 步骤 d为: 从固相载体上切割肽链, 环化后脱去侧链保护基, 经纯化获得环肽。
9. 一种分离的多核苷酸, 它包含一核苷酸序列, 该核苷酸序列选自下组: (a) 编码权利要求 1-4任一权利要求所述 RTN4B相关多肽的多核苷酸; (b ) 与 多核苷酸 (a)互补的多核苷酸。
10. 如权利要求 1-4任一权利要求所述 RTN4B相关多肽在制备抑制 RTN4B的生物 学活性的药物或制剂中的用途。
11. 如权利要求 1-4任一权利要求所述的用途, 其特征在于, 所述抑制 RTN4B的 生物学活性的药物或制剂为抑制 RTN4B调节细胞黏附能力的药物或制剂。
12. 如权利要求 1-4任一权利要求所述 RTN4B相关多肽在制备治疗或预防肿瘤的 药物中的用途。
13. 如权利要求 12所述 RTN4B相关多肽的用途, 其特征在于, 所述肿瘤选自其 生长或增殖与 RNT4B蛋白的表达或活性相关的肿瘤。
14. 如权利要求 12所述 RTN4B相关多肽的用途, 其特征在于, 所述肿瘤为肝癌。
15. 权利要求 1-4任一权利要求所述 RTN4B相关多肽在制备抑制血管内皮细胞黏 附的药物或制剂中的应用。
16. 一种药物或制剂, 其活性成分含有权利要求 1-4任一所述 RTN4B相关多肽。
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1311439A (zh) * 2000-03-02 2001-09-05 复旦大学 人rtn4b蛋白和编码序列,及其制法和用途
CN1745094A (zh) * 2002-12-06 2006-03-08 新加坡综合医院有限公司 肽,其抗体,以及它们在中枢神经系统损伤的治疗中的用途
CN101015683A (zh) * 2007-01-18 2007-08-15 复旦大学 人rtn4b蛋白在制备创伤愈合药物中的应用

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2007222991A1 (en) * 2006-03-09 2007-09-13 The Board Of Regents Of The University Of Texas System Compositions and methods based on peptide binding profiling

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1311439A (zh) * 2000-03-02 2001-09-05 复旦大学 人rtn4b蛋白和编码序列,及其制法和用途
CN1745094A (zh) * 2002-12-06 2006-03-08 新加坡综合医院有限公司 肽,其抗体,以及它们在中枢神经系统损伤的治疗中的用途
CN101015683A (zh) * 2007-01-18 2007-08-15 复旦大学 人rtn4b蛋白在制备创伤愈合药物中的应用

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
DATABASE GENBANK 9 September 2000 (2000-09-09), ZHOU, Y. ET AL.: "reticulon 4b [Homo sapiens]", retrieved from http://www.ncbi.nlm.nih.gov/protein/AAG12177 accession no. AG12177.1 *
GLASS, D.B. ET AL.: "Synthetic peptides corresponding to the site phosphorylated in 6-phosphofructo-2-kinase/fructose-2,6-bisphosphatase as substrates of cyclic nucleotide-dependent protein kinases.", J. BIOL. CHEM., vol. 261, no. 6, 25 February 1986 (1986-02-25), pages 2987 - 2993 *
LI, Q. ET AL.: "Link of a new type of apoptosis-inducing gene ASY/Nogo-B to human cancer", ONCOGENE, vol. 20, no. 30, 5 July 2001 (2001-07-05), pages 3929 - 3936 *
NAM, M.H. ET AL.: "Comparative proteomic analysis of early salt stress-responsive proteins in roots of SnRK2 transgenic rice", PROTEOME SCIENCE, vol. 10, 31 March 2012 (2012-03-31), pages 1 - 19 *

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