Weimin Sun, Guowei Wu, Xinyu Tian, Chunting Qi, Jingli Liu, Yilun Tong, Mengmeng Zhang, Jiayang Gao, Ze Cao, Yuchao Zhang, Zhijun Liu, Xiaoxu Tian, Ping Wu, Chao Peng, Jingwen Li, Li Tan, Bing Shan, Jianping Liu, Ying Li, Junying Yuan
TAK1 is a key modulator of both NF-κB signaling and RIPK1. In TNF signaling pathway, activation of TAK1 directly mediates the phosphorylation of IKK complex and RIPK1. In a search for small molecule activators of RIPK1-mediated necroptosis, we found R406/R788, two small molecule analogs that could promote sustained activation of TAK1. Treatment with R406 sensitized cells to TNF-mediated necroptosis and RIPK1-dependent apoptosis by promoting sustained RIPK1 activation. Using click chemistry and multiple biochemical binding assays, we showed that treatment with R406 promotes the activation of TAK1 by directly binding to TAK1, independent of its original target Syk kinase...
September 26, 2023: Proceedings of the National Academy of Sciences of the United States of America