抗第二线粒体凋亡蛋白SmacDiablo单克隆抗体的筛选
时间:2019-08-02 22:08 来源:毕业论文 作者:毕业论文 点击:次
摘要:第二线粒体凋亡蛋白 Smac/ Diablo 是近年来新发现的一种线粒体蛋白,Smac/Diablo 可以有效抑制细胞的增值,促进细胞的凋亡,对于治疗肿瘤有显著效果,因此,抗 Smac/Diablo 单克隆抗体的筛选对 Smac/Diablo 蛋白的检测具有重要意义。本实验用 Western Blot 方法对抗 Smac/Diablo 兔单克隆抗体进行初筛和复筛,从众多单克隆抗体中筛选出与蛋白 Smac/Diablo 结合效果最好的一株。在实验中,我们筛选出了 Diablo-R006,用 Diablo-R006 抗体对抗原检测限进行鉴定,结果显示,Smac/Diablo 蛋白含量在 0.0005ug/ul 时即可被检测出来,灵敏度比较高,说明该株抗体与蛋白Smac/Diablo 特异性结合效果比较好,可以用于后续的医药研究及开发。37736 毕业论文关键词:Smac/Diablo;单克隆抗体;Western Blot;凋亡 The Selection of Anti-Smac/Diablo Monoclonal Antibodies Abstract:The cysteine proteinase activator ( Smac/Diablo) ,which is derived from thesecond mitochondria, is a new mitochondrial protein discovered in recent years.Smac/Diablo has a significant effect in treating tumors as it can inhibit theproliferation and promote the apoptosis of the cell, so the screening of smac/Diablomonoclonal antibodies is is very important for detecting cellular Smac/Diablo protein.This experiment will use Western Blot method to screen and re-screen anti-Smac/Diablo rabbit monoclonal antibodies, to selected from several monoclonal antibodyand protein Smac/Diablo combining effect is the best one. In the experiments, finallywe selected the Diablo-R006,Diablo-R006 combines with Smac/Diablo protein is thebest. Furthermore, we used the Diablo-R006 to identify the Smac/Diablo antigendetection limit and found that the protein can be detected when its concentration was0.005ug/ul and the sensitivity was high. It is concluded that the strain of Smac/Diablospecificity of antibody and protein combined effect is the best, so it can be used forsubsequent pharmaceutical research and development. Key words: Smac/Diablo; Monoclonal Antibody; Western Blot;Apoptosis 目 录 摘要 1 引言 2 1材料与方法.3 1.1材料.3 1.2抗 Diablo 兔单克隆抗体的初筛4 1.3抗 Diablo 兔单克隆抗体的复筛6 1.4抗 Diablo 兔单克隆抗体的抗原检测限7 2结果与分析.8 2.1抗 Diablo 兔单克隆抗体的初筛8 2.2抗 Diablo 兔单克隆抗体的复筛8 2.3抗 Diablo 兔单克隆抗体的抗原检测限9 2.4抗 Diablo 单克隆抗体的细胞裂解实验10 3讨论与结论. 11 参考文献. 12 致谢 13 引言细胞凋亡是主动的由基因决定的自主性细胞有序死亡, 对保持机体的自身稳定和正常生长有十分重要的意义[1]。细胞凋亡受抑,将导致细胞生存期延长,使突变的细胞快速繁殖,最终可致肿瘤和多种疾病的产生。例如:增生性瘢痕、胃癌、肾癌、胰腺癌等癌症[2]。细胞凋亡存在内源和外源两条通路,分别称为死亡受体通路和线粒体通路。这两条凋亡途径的起始和终止都需要细胞凋亡蛋白酶(caspase)家族的参与[3]。在细胞受到各种凋亡刺激(包括抗癌药物、紫外线照射、化学信号、DNA 损伤)时,第二线粒体凋亡蛋白 Smac/Diablo(The second mitochondrial activator ofcaspase/direct IAP binding protein with low PI)的线粒体定位信号肽被切除, 形成有活性的 Smac/Diablo 蛋白释放到细胞质中,这时的 Smac/Diablo 蛋白可以特异结合细胞凋亡抑制因子(IAP)[4],解除凋亡因子 IAP 对于 caspase3、caspase9 等的抑制作用,从而促进细胞凋亡。凋亡的线粒体通路是经典的内源性通路,不同的促凋亡信号聚集在线粒体内,诱导线粒体膜通透性的改变,此时线粒体释放可溶的、可促进凋亡的蛋白(intermem branespaces,IMP)[5]。经典的膜间蛋白有细胞色素 C(cytoC)、凋亡诱导因子 (Apoptosis Iducing Factor,AIF)等, Smac/Diablo 是新发现的线粒体膜间蛋白,是 cytoC、AIF 一样,是最新发现的线粒体膜间促凋亡蛋白,其促凋亡活性与细胞定位有关[6]。 (责任编辑:qin) |