双特异性单链抗体介导的CIK细胞对结肠癌的体内杀伤作用

目的 观察双特异性单链抗体介导的细胞因子诱导的杀伤细胞(CIK)细胞在体内杀伤结肠癌细胞的作用.方法 将SW1116细胞种植裸鼠后,建立裸鼠结肠癌模型,分为3组分别经尾静脉注入生理盐水、CIK细胞及CIK细胞+双特异性抗体,每周治疗1次,共4周,取出肿瘤组织称重,并计算出各组的抑瘤率.结果 在体内,CIK组和CIK+双抗组均可抑制肿瘤生长,抑瘤率分别为29.70%和65.02%,与对照组比较差异均有统计学意义(P＜0.05).CIK组和CIK+双抗组的瘤体积、瘤重、抑瘤率比较,差异均有统计学意义(P＜0.05).结论 CIK细胞本身可以抑制肿瘤细胞的生长,在加入抗CD3抗癌胚抗原(CEA)双特异性单链抗体后抑瘤作用明显增强.

Abstract：

Objective To investigate the killing effect of cytokine-induced killer cell (CIK) mediated by bispecific single-chain antibody in vivo on colon cancer cells. Methods The colon cancer model in nude mice was established with SW1116 cells. The mice were divided into 3 groups, which were injected with normal saline, CIK cells and CIK cells + bispecific antibody, respectively, once a week for 4 weeks. The tumors were removed and weighed, and the tumore inhibition rate in each group was calculated. Results The CIK cells and CIK cells with bispecific single-chain antibody could both inhibit tumor growth in vivowith the tumor inhibition rate being 29. 70% and 65.02% respectively ( P ＜ 0. 05 ). There was significant difference in tumor inhibition rate between CIK cells and CIK cells with bispecific single-chain antibody ( P ＜ 0. 05 ). Conclusion CIK cells alone can inhibit tumor cell growth, CIK cells in combination with bispecific single-chain antibody can exert more significant antitumor effect.

Killing effect of CIK cell mediated by bispecific single-chain antibody in vivo on colon cancer

Objective To investigate the killing effect of cytokine-induced killer cell (CIK) mediated by bispecific single-chain antibody in vivo on colon cancer cells. Methods The colon cancer model in nude mice was established with SW1116 cells. The mice were divided into 3 groups, which were injected with normal saline, CIK cells and CIK cells + bispecific antibody, respectively, once a week for 4 weeks. The tumors were removed and weighed, and the tumore inhibition rate in each group was calculated. Results The CIK cells and CIK cells with bispecific single-chain antibody could both inhibit tumor growth in vivowith the tumor inhibition rate being 29. 70% and 65.02% respectively ( P ＜ 0. 05 ). There was significant difference in tumor inhibition rate between CIK cells and CIK cells with bispecific single-chain antibody ( P ＜ 0. 05 ). Conclusion CIK cells alone can inhibit tumor cell growth, CIK cells in combination with bispecific single-chain antibody can exert more significant antitumor effect.