Yuzhen Qian, Yixuan Sun, Peishang Shi, Xiuman Zhou, Qiongqiong Zhang, Qingyu Dong, Shengzhe Jin, Lu Qiu, Xiaoshuang Niu, Xiaowen Zhou, Wenshan Zhao, Yahong Wu, Wenjie Zhai, Yanfeng Gao
Aside from antibodies, peptides show great potential as immune checkpoint inhibitors (ICIs) due to several advantages, such as better tumor penetration and lower cost. Lymphocyte-activation gene 3 (LAG-3) is an immune checkpoint which can induce T cell dysfunction through interaction with its soluble ligand fibrinogen like protein-1 (FGL1). Here, we found that LAG-3 expression was higher than programmed cell death protein 1 (PD-1) in multiple human cancers by TCGA databases, and successfully identified a LAG-3 binding peptide LFP-6 by phage display bio-panning, which specifically blocks the interaction of LAG-3/FGL1 but not LAG-3/MHC-II...
March 2024: Acta Pharmaceutica Sinica. B