腹腔内注射TNF基因转染的LAK细胞对于腹水型肝癌小鼠的疗效

Therapeutic Effect of TNF Gene-transfected LAK Cells on the Ascitic Liver Carcinoma-bearing Mice

在逆转录病毒介导下将TNF基因转染入鼠LAK细胞中,结果发现,转染TNF基因的LAK细胞比正常LAK细胞和转染对照基因的LAK细胞分泌更高水平的TNF,其体外生长能力和杀伤活性均显著升高,抗TNF单抗可显著抑制其体外杀伤活性,表明其杀伤活性升高是由基因转染后所表达的TNF介导的.将较低数量的TNF基因转染的LAK细胞与IL～2联合腹腔内注射后,对腹水型肝癌小鼠有显著的治疗效果.

TNF gene was transfected into murine LAK cells by retrovirus. Our results showed that TNF gene-transfected LAK cells secreted TNF more than normal LAK cells and control gehe-transfected LAK cells. The in vitro growth ability and cytotoxicity of TNF gene-transfected LAK cells were augmented significantly.The cytotoxicity of ,TNF gene-transfected LAK cells was markedly inhibited by anti - TNF monoclonal antibody, indicating that the, above augmentation was mediated by TNF secreted by transfected LAK cells. Significant therapeutic effect on the ascitic liver carcinoma.-bearing mice was achieved by i.p. injection of low dosage TNF gene transfected LAK cells and IL - 2.