【摘要】 应用抗CD3单抗和人rIL-2共同诱导人外周血单个核细胞制备人CD3AK细胞(CDAK).采用LDH释放法、ABC-CELISA法、流式细胞术等方法观察了CD3AK杀伤癌细胞的机理及人rIFN-α、rIFN-γ、rTNF细胞因子、化疗药顺氨氯铂(CDDP)和阿霉素(ADM)对CD3AK杀伤活性的调控效应.结果表明,①粘附分子ICAM-1/LFA-1参与CD3AK的杀瘤过程,并且rIFN-α、rTNF的促CD3AK杀伤效应亦是通过上述途径实现的.③CD3AK通过分泌可溶性杀伤因子间接杀伤癌细胞.③CD3AK通过膜相关TNF参与杀伤效应.④CD3AK介导癌细胞凋亡.⑤化疗药CDDP和ADM处理癌细胞后,提高其对CD3AK杀伤活性的敏感性,CDDP促杀伤效应与其上调癌细胞表面ICAM-1、HLA-ABC抗原表达有关.更多还原

【Abstract】 Human CD3AK cells were prepared from peripheral blood mononuclear cells by culturing with recombinant IL-2 and antiCD3AK McAb. The mechanism and regulation of CD3AK cytotoxic activity with cytokines (rhIFN-α, rhIFN-γ, TNF) and chernotherapeutic agents (CDDP or ADM) were observed by LDH-release assay, ABC-CELISA and the flow cytometric assay. The results showed: (1) Adhesion molecules ICAM-l/LFA-1 participated in CD3AK-mediated killing of tumor cells, hrlFN-α and TNF enhanced cytotoxicity of CD3AK through this pathway. (2) CD3AK could indirectly kill tumor cells by releasing soluable cytotoxic factors. (3) The membrane-associated TNF may be involved in CD3AK-mediated cytotoxicity. (4) CD3AK cells could induce the apoptosis of tumor cells. (5) Pretreatment of tumor cells with CDDP or ADM resulted in the increased vulnerability of tumor cells to CD3AK-mediated killing, the enhancement of CD3AK-mediated cytotoxicity by CDDP was relative to the increased expression of ICAM-1, HLA-ABC on tumor cell membrane.更多还原