在过去的 20 年里,抑癌基因 PTEN 已被证明参与重要的生理过程,然而它的缺失与突变常与肿瘤的形成相关。肿瘤的发生发展主要是由于原癌基因的激活和抑癌基因的 失活所致。恶性肿瘤的免疫逃逸以及肿瘤微环境中肿瘤浸润淋巴细胞上程序性细胞死亡 1(PD-1) 受体的高表达可能是导致免疫监视失效的原因。负性协同刺激分子 B7-Hl 是 PD-1 的配体,在肿瘤的免疫逃逸中发挥着重要作用。现就 PTEN 与 B7-H1 分子的在肿瘤微环境中关系综述如下。In the past 20 years, the tumor suppressor gene PTEN has been shown to be involved in physiological processes importantly, but its absence and mutation is often related to tumor formation. The occurrence and development of tumor is mainly due to the activation of oncogene and inactivation of tumor suppressor genes. Tumor immune evasion and overexpression of PD-1 in the tumor-infiltrating lymphocytes may result in the failture of immune sunveillance.B7-Hl,which is one of the negative costimulatory molecules,is aligand of PD-1,playing an important role in tumor immune evasion. Here is to make a review on the relationship between PTEN and B7-H1 molecules in the tumor microenvironment. .