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抗人NRP1单克隆抗体的活性鉴定及初步应用
Authors
倪二茹
吕莎
+5 more
张海鹏
曹畅
曾凡伟
王生育
颜江华
Publication date
1 August 2012
Publisher
Abstract
目的鉴定抗人神经菌毛素1(neuropilin1,NRP1)单克隆抗体的生物活性并利用该抗体检测常见肿瘤细胞株NRP1蛋白的表达情况。方法腹水法制备4株抗NRP1单克隆抗体并用rProtein A亲和柱纯化抗体,间接ELISA检测4株抗体的滴度水平,Western blot分析4株抗体结合NRP1蛋白的特异性,流式细胞术分析4株抗体结合NRP1蛋白的亲和力,共聚焦免疫荧光实验进一步验证抗体结合NRP1蛋白的能力;细胞免疫组织化学染色检测14株肿瘤细胞表达NRP1蛋白的情况。结果 4株抗体均能特异结合NRP1蛋白,其中A6结合NRP1能力最强,能结合在表达NRP1蛋白的细胞膜表面。细胞免疫组织化学染色结果显示NRP1在HepG2、C6、HEK293、BEL-7402、MDA-MB-453呈高水平表达,在U87、MGC803、MCF7、MDA-MB-231中表达水平相对较弱,而在U251、BGC823、H6、HT-29的表达介于两者之间,在SMMC-7721细胞中未检测到表达。结论 4株抗NRP1单克隆抗体均能特异结合NRP1蛋白,多种肿瘤细胞株均不同程度表达NRP1蛋白,为进一步探讨NRP1蛋白与肿瘤发生发展的关系奠定了基础
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Last time updated on 16/06/2016