基础医学与临床 ›› 2007, Vol. 27 ›› Issue (8): 849-852.

• 研究论文 • 上一篇    下一篇

RKIP蛋白在多个人肺癌细胞系中的表达下调

韩海勃 张志谦 赵威   

  1. 北京大学临床肿瘤学院 北京市肿瘤防治研究所 北京肿瘤医院 北京大学临床肿瘤学院 北京市肿瘤防治研究所 北京肿瘤医院 北京大学临床肿瘤学院 北京市肿瘤防治研究所 北京肿瘤医院
  • 收稿日期:2007-01-16 修回日期:2007-01-30 出版日期:2007-08-25 发布日期:2007-08-25
  • 通讯作者: 张志谦

Downregulation of Raf kinase inhibitory protein in human lung carcinoma cell lines

Hai-bo Han Zhi-qian Zhang Wei Zhao   

  • Received:2007-01-16 Revised:2007-01-30 Online:2007-08-25 Published:2007-08-25
  • Contact: Zhi-qian Zhang

摘要: 目的 检测肺癌细胞系中RKIP的表达情况,探讨其与肺癌细胞侵袭、转移的关系。方法 RT-PCR法检测多个人肺癌细胞系中RKIP的表达情况,构建表达人RKIP的融合蛋白,纯化后免疫新西兰白兔制备多克隆抗体。ELISA鉴定血清特异抗体效价,免疫印迹法鉴定血清特异抗体并检测肺癌细胞系中RKIP表达。结果 成功构建表达人RKIP的融合蛋白,制备的多抗效价达到106,可特异检测细胞内RKIP表达;有转移性的3个肺癌细胞系中RKIP表达明显下调,且在转移性较高的A549细胞中下调更明显。结论 获得了效价和特异性都良好的RKIP多抗,适合应用于RKIP的检测。RKIP表达下调与肺癌细胞侵袭、转移有关,有可能成为肺癌治疗的靶点。

关键词: RKIP, 多克隆抗体, 肺癌

Abstract: ABSTRACT:Objective To detect the expression level of RKIP in human lung carcinoma cell lines and investigate the relationships between RKIP and cell metastasis. Methods The expression level of RKIP in human lung carcinoma cell lines was analyzed by RT-PCR. Construct and express human RKIP fusion protein and immunize New Zealand rabbit with the purified fusion protein to prepare polyclonal antiserum.The antiserum titer was identified by ELISA. The specifcity of antiserum and expression level of RKIP in human lung carcinoma cell lines was analyzed by western blotting. Results The fusion protein was expressed successfully. The prepared polyclonal antibody reacted specifically with RKIP in human cells. Downregulation of RKIP was detected in three lung carcinoma cell lines with metastasis, and it is more significant in A549 with higher metastasis. Conclusion The RKIP antiserum with high titer and good specificity could satisfy the requirement for studying on RKIP. Downregulation of RKIP has correlation with human lung carcinoma cell metastasis.

Key words: RKIP, Polyclonal antibody, Lung carcinoma