CIK细胞对Lewis肺癌细胞凋亡影响的实验研究

目的 观察CIK细胞对Lewis肺癌细胞增殖的抑制作用,探讨其抑瘤机制.方法 常规方法培养CIK细胞,以CIK细胞为效应细胞,Lewis肺癌细胞为靶细胞,以不同效靶比共同培养,MTT法检测细胞增殖情况,同时电镜观察Lewis肺癌细胞形态特征改变;流式细胞仪检测Lewis肺癌细胞的凋亡;免疫细胞化学法检测并比较FasL在单个核细胞和CIK细胞表面的表达;用MTF法检测抗FasL单克隆抗体对CIK细胞杀伤Lewis肺癌细胞的影响.结果 电镜观察:CIK细胞能促进Lewis肺癌细胞凋亡超微结构的改变;流式细胞仪检测:CIK细胞组凋亡率明显高于对照组;FasL在CIK细胞表达增加;抗Fas单抗可抑制CIK杀伤Lewis肺癌细胞的活性.结论 CIK细胞可在体内及体外抑制Lewis肺癌细胞增殖,诱导肿瘤细胞凋亡,Fas/FasL途径在其中发挥一定作用.

The empirical study on the effect of CIK cell on apoptosis of Lewis lung cancer cell

Objective To investigate the inhibitory effects of CIK on the proliferation of Lewis lung carcinoma cell line and the growth of transplanted Lewis lung carcinoma in C57BL/6N mice in vivo.Methods CIK cells were induced by culturing PBMC with regular method.The proliferation of Lewis lung carcinoma cells was measured by MTT assay.Uhramicrostrueture of Lewis lung carcinoma cells was observed under a transmission electron microscope.Flowcytometric analysis was used to detect cell apoptosis.Ultrastructural observation expressions of FasL were individually determined by MTT and immunocytochemistry(ICC) analysis.Results Electron microscopic observations sbowed that CIK cells could induce the hepatoma cells to apoptosis.Flow cytometric analysis demonstrated that apoptosis cells of Lewis lung carcinoma were increased in CIK group compared with those in the control group.FasL expression on CIK increased.Cytotoxieity was blocked after addition of anti-FasmAb.Conclusion CIK has inhibitory effect on Lewis lung carcinoma cells both in vitro and in vivo.CIK cells can induce the apoptosis of Lewis lung carcinoraa cells.and Fas/FasL pathway plays an important role in apoptosis of Lewis lung carcinoma cells by CIK.