摘要
Antibody-based PD-IIPD-L1 blockade therapies have taken center stage in immunotherapies for cancer, with multiple clinical successes. PD-1 signaling plays pivotal roles in tumor-driven T-cell dysfunction. In contrast to prior approaches to generate or boost tumor-specific T-cell responses, antibody-based PD-1/PD-L1 blockade targets tumor-induced T-cell defects and restores pre- existing T-cell function to modulate antitumor immunity. in this review, the fundamental knowledge on the expression regulations and inhibitory functions of PD-1 and the present understanding of antibody-based PD-1/ PD-L1 blockade therapies are briefly summarized. We then focus on the recent breakthrough work concerning the structural basis of the PD-IIPD-Ls interaction and how therapeutic antibodies, pembrolizumab targeting PD-1 and avelumab targeting PD-L1, compete with the binding of PD-1/PD-L1 to interrupt the PD-1/PD-L1 interaction. We believe that this structural informationwill benefit the design and improvement of therapeutic antibodies targeting PD-1 signaling.
Antibody-based PD-IIPD-L1 blockade therapies have taken center stage in immunotherapies for cancer, with multiple clinical successes. PD-1 signaling plays pivotal roles in tumor-driven T-cell dysfunction. In contrast to prior approaches to generate or boost tumor-specific T-cell responses, antibody-based PD-1/PD-L1 blockade targets tumor-induced T-cell defects and restores pre- existing T-cell function to modulate antitumor immunity. in this review, the fundamental knowledge on the expression regulations and inhibitory functions of PD-1 and the present understanding of antibody-based PD-1/ PD-L1 blockade therapies are briefly summarized. We then focus on the recent breakthrough work concerning the structural basis of the PD-IIPD-Ls interaction and how therapeutic antibodies, pembrolizumab targeting PD-1 and avelumab targeting PD-L1, compete with the binding of PD-1/PD-L1 to interrupt the PD-1/PD-L1 interaction. We believe that this structural informationwill benefit the design and improvement of therapeutic antibodies targeting PD-1 signaling.
基金
This work was supported by the National Basic Research Program （973 Program） （Nos. 2013CB531502 and 2014CB542503）, the National Natural Science Foundation of China （Grant Nos. 31390432 and 31500722）, Grand S＆T project of China Health and Family Planning Commission （2013ZX10004608-002 and 2016ZX10004201-009）, the Strategic Priority Research Program of the Chinese Academy of Sciences （CAS
XDB08020100）. GFG is supported partly as a leading principal investigator of the NSFC Innovative Research Group （81321063）.
