Zheng Peilin, Zhou Zhiguang
Institute of Metabolism and Endocrinology, The Second Xiangya Hospital, Key Laboratory of Diabetes Immunology, Ministry of Education, Central South University, National Clinical Research Center for Metabolic Diseases, Changsha, Hunan, China.
Biomark Cancer. 2015 Sep 20;7(Suppl 2):15-8. doi: 10.4137/BIC.S29325. eCollection 2015.
The ligation of programmed cell death-1 (PD-1) to its ligands PD-L1 and PD-L2 counteracts T-cell activation, which is critical in immune tolerance. The persistent high expression of PD-1 and PD-L1 are also observed on tumor-infiltrating lymphocytes and various tumor cells, maintaining the highly suppressive microenvironment in tumor sites and promoting tumor malignancies. The blockade of PD-1 axis with PD-L2 fusion protein or monoclonal antibodies against either PD-1 or PD-L1 has been clinically evaluated in various tumor types. This short review summarizes the progress of PD-1 axis blockade in clinical trials to evaluate its effectiveness in the antitumor immunotherapy.
程序性细胞死亡蛋白1(PD-1)与其配体PD-L1和PD-L2的结合会抵消T细胞的激活,这在免疫耐受中至关重要。在肿瘤浸润淋巴细胞和各种肿瘤细胞上也观察到PD-1和PD-L1持续高表达,维持肿瘤部位高度抑制性的微环境并促进肿瘤恶性进展。用PD-L2融合蛋白或抗PD-1或PD-L1的单克隆抗体阻断PD-1轴已在多种肿瘤类型中进行了临床评估。这篇简短的综述总结了PD-1轴阻断在临床试验中的进展,以评估其在抗肿瘤免疫治疗中的有效性。