OK432优化的内皮细胞疫苗抗小鼠乳腺癌作用研究

摘要

目的：探讨 OK432优化的人脐静脉内皮细胞( HU-VECs)疫苗对小鼠EAC乳腺癌的生长抑制作用。方法体外培养HUVECs,与佐剂OK432混合,制备HUVECs-OK432疫苗,以小鼠 EAC 乳腺癌皮下移植瘤模型考查 HUVECs-OK432疫苗的抗肿瘤效应,并通过ELISA、脾细胞增殖及细胞毒性T淋巴细胞( CTL)杀伤实验检测疫苗免疫后体液及细胞免疫应答水平。结果在预防性免疫中, HUVECs-OK432疫苗可以明显抑制EAC乳腺癌生长；HUVECs-OK432疫苗诱导小鼠产生了高滴度的特异性 HUVEC 抗体；HU-VECs-OK432疫苗能有效刺激免疫小鼠脾淋巴细胞的增殖；HUVECs-OK432组小鼠脾细胞诱导产生了明显的靶向HU-VEC细胞的CTL杀伤作用。结论 HUVECs-OK432疫苗可以有效诱导机体产生靶向HUVEC的特异性体液及细胞免疫应答,从而有效抑制了小鼠EAC乳腺癌的生长。%Aim To investigate the anti-EAC breast cancer effects of viable human umbilical vein endothe-lial cells ( HUVECs) vaccine. Methods Subconflu-ent HUVECs were mixed with OK432 to prepare HU-VECs-OK432 vaccine, and the anti-tumor efficacy of HUVECs-OK432 was investigated using a subcutaneous tumor model of EAC breast cancer. ELISA, splenic lymphocyte proliferation assay and cytotoxic T lympho-cytes ( CTL ) killing assay were adopted to detect the humoral and cellular immune responses after HUVECs-OK432 immunization. Results HUVECs-OK432 im-munization significantly inhibited the growth of EAC tumor in mice in the prophylactic procedures. High ti-ter of anti-HUVEC antibody was elicited by HUVECs-OK432 immunization. The proliferation activity of splenocytes from mice immunized with HUVECs-OK432 was significantly increased. T lymphocytes iso-lated from HUVECs-OK432-immunized mice were dose dependently killing HUVECs in vitro. Conclusion Strong humoral and cellular immune responses targeting HUVEC are elicited by HUVECs-OK432 immuniza-tion, which results in a significant inhibition on the growth of EAC tumor in mice.