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Discovery of Novel 1,2,3-triazole Derivatives as IDO1 Inhibitors. 2022

Xixi Hou, and Xiaoqing Gong, and Longfei Mao, and Jie Zhao, and Jianxue Yang
The First Affiliated Hospital and College of Clinical Medicine of Henan University of Science and Technology, Luoyang 471003, China.

Indoleamine 2,3-dioxygenase 1 (IDO1) has received much attention as an immunomodulatory enzyme in the field of cancer immunotherapy. While several IDO1 inhibitors have entered clinical trials, there are currently no IDO1 inhibitor drugs on the market. To explore potential IDO1 inhibitors, we designed a series of compounds with urea and 1,2,3-triazole structures. Organic synthesis and IDO1 enzymatic activity experiments verified the molecular-level activities of the designed compounds, and the IC50 value of compound 3a was 0.75 μM. Molecular docking and quantum mechanical studies further explained the binding mode and reaction potential of compound 3a with IDO1. Our research has resulted in a series of novel IDO1 inhibitors, which is beneficial to the development of drugs targeting IDO1 in numerous cancer diseases.

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