摘要目的：探讨Vγ9δ2 T细胞识别的肿瘤相关新蛋白质配体人MutS同源蛋白2（hMSH2）在宫颈癌免疫中的作用与意义。方法通过特异性抗体阻断宫颈癌细胞表面异位表达的hMSH2分子，分析Vγ9δ2 T细胞杀伤功能变化及IFN-γ、TNF-α分泌情况；使用ELISA检测宫颈癌患者血清hMSH2水平；使用肿瘤组织芯片（ TMA）分析hMSH2在宫颈癌组织中的表达情况。结果 anti-hMSH2抗体封闭后，Vγ9δ2 T细胞对宫颈癌细胞的杀伤作用显著降低，分泌IFN-γ减少，TNF-α分泌无明显变化；宫颈癌患者血清hMSH2水平略高于正常人；hMSH2在宫颈癌组织中存在异常的核浆分布。结论 hMSH2可促进Vγ9δ2 T细胞杀伤宫颈癌细胞及分泌IFN-γ，在宫颈癌固有免疫中具有重要意义。

abstractsObjective To explore the role of hMSH2, a novel endogenous tumor-associated pro-tein ligand recognized by Vγ9δ2 T cells, in innate anti-cervix cancer immunity .Methods hMSH2 that ex-pressed on the surface of cervical cancer cell line HeLa cells was blocked by specific antibody .Then the differences in their effects on Vγ9δ2 T cells before and after antibody blockage were evaluated by cytotoxicity of Vγ9δ2 T cells and cytokines secretion .The serum levels of hMSH2 in patients with cervical cancer were detected by ELISA .Distribution of hMSH2 in cervical cancer tissues was analyzed by TMA immunohisto-chemistry .Results Decreased cytotoxicity and IFN-γsecretion were observed in Vγ9δ2 T cells against He-La cells blocked with specific anti-hMSH2 antibody .Serum concentration of hMSH 2 in patients with cervical cancer was slightly higher than that of healthy control .Altered distribution pattern of hMSH 2 was observed in cervical cancer tissues .Conclusion hMSH2 is involved in Vγ9δ2 T cells-mediated innate anti-cervical cancer immunity by enhancing their cytotoxicity and IFN-γsecretion.