人C5a过敏毒素拮抗剂的分子设计及其活性检测 |
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引用本文: | 吕凤林,朱锡华,郑萍,胡承香. 人C5a过敏毒素拮抗剂的分子设计及其活性检测[J]. 中国免疫学杂志, 2001, 17(3): 125-129 |
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作者姓名: | 吕凤林 朱锡华 郑萍 胡承香 |
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作者单位: | 1. 第三军医大学野战外科研究所大坪医院,重庆400042 2. 第三军医大学全军免疫学研究所,重庆 400038 |
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基金项目: | 受国家自然科学基金资助(编号:39770315,39970330) |
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摘 要: | 目的:从蛋白质结构与功能的关系出发,探讨C5aR与其配体的C5a的结合位。方法:按分子设计理论,采用亲水性方案寻找C5aR胞外区高亲水性区域,Fmoc方案人工合成C5aR第9-30位氨基酸基序(P22肽),经高效液相色谱纯化,毛细管电泳鉴定。结果:合成多肽(P22)的纯度为95.19%,每次缩合的平均效率为99.78%;能与anti-C5aR McAb(S5/1,Serotic公司)有效地结合,酶联OD490极显著高于同浓度对照多肽C20;还可被配体rh-C5a(10ng/ml)明显抑制而降低其酶联OD值(P<0.05),此外10ng/mlP22还可抑制rhC5a所致U937细胞胞浆Ca^2 升高(P<0.01)。结论:从C5a分子中寻找C5a结合位基序,可拮抗C5a的过敏毒素作用,为治疗C5a及其相关疾病进行新型的药物设计。
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关 键 词: | 分子设计 C5a C5a受体 CD88 过敏毒素拮抗剂 |
文章编号: | 1000-484X(2001)03-0125-05 |
Molecular design forantagonisting C5a anaphyl atoxin and the activity examination of the peptide |
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Abstract: | Objective:To discover some high hydrophilic profiles of the humanC5a anaphylatoxin based on relationship between the structure and function of the protein and the prot ein molecular design principles.Methods:The peptides were synthesized by 431A automatic pe ptide synthesizer,purified by PHLC an d confirmed by caplilliary electrophoresis.Results:The N- terminus No.9-30 profile of the C5aR(P22) could interacte with anti-C5aR McAb( S5/1,from Serotic Co.),as determined by ELISA.Furthermore,it could be inhibited OD490 values remarkably by 10.0 μg/L rhC5a(P<0.05)as well.In addition,the cytoplasmic Ca2+ concentration was inhibited by P22 in dt2cAMP differentia ted U937 that induced by 10.0 μg/L rhC5a(P<0.01).Conclusion:It is possible that the C5a anaphylatoxin would be removed from the body,and some newtype pharmaceuticals that therapy disease interrelated C5a anaphylatoxin could be manufactured. |
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Keywords: | Molecular design C5a anaphylatoxin C5a receptor(CD88) |
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