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ID: ALA3585308

Journal: J Med Chem

Title: Discovery and Modification of in Vivo Active Nrf2 Activators with 1,2,4-Oxadiazole Core: Hits Identification and Structure-Activity Relationship Study.

Authors: Xu LL, Zhu JF, Xu XL, Zhu J, Li L, Xi MY, Jiang ZY, Zhang MY, Liu F, Lu MC, Bao QC, Li Q, Zhang C, Wei JL, Zhang XJ, Zhang LS, You QD, Sun HP.

Abstract: Induction of phase II antioxidant enzymes by activation of Nrf2/ARE pathway has been recognized as a promising strategy for the regulation of oxidative stress-related diseases. Herein we report our effort on the discovery and optimization of Nrf2 activators with 1,2,4-oxadiazole core. Screening of an in-house collection containing 7500 compounds by ARE-luciferase reporter assay revealed a moderate Nrf2 activator, 1. Aimed at obtaining more derivatives efficiently, molecular similarity search by the combination of 2D fingerprint-based and 3D shape-based search was applied to virtually screening the Chemdiv collection. Three derivatives with the same core were identified to have better inductivity of Nrf2 than 1. The best hit 4 was selected as starting point for structurally optimization, leading to a much more potent derivative 32. It in vitro upregulated gene and protein level of Nrf2 as well as its downstream markers such as NQO1, GCLM, and HO-1. It remarkably suppressed inflammation in the in vivo LPS-challenged mouse model. Our results provide a new chemotype as Nrf2-ARE activators which deserve further optimization with the aim to obtain active anti-inflammatory agents through Nrf2-ARE pathway.

CiteXplore: 26111355

DOI: 10.1021/acs.jmedchem.5b00170