Abstract
Synthetic CB2 receptor agonists exhibit great potential in the treatment of neurodegenerative diseases, chronic and neuropathic pain, cancer, and inflammation-associated pathologies while avoiding adverse psychoactive effects caused by interactions with CB1 receptors. Herein, a class of 5-aryl-pyrazole-3-carboxamide derivatives was thus designed, synthesized, and biologically evaluated. Among the compounds tested, compound 33, one of the most potent leads, showed a remarkably high potency and selectivity at the CB2 receptor (EC50, CB2 = 16.2 nM, EC50, CB1 > 105 nM). Furthermore, 33 treatment significantly attenuate colon inflammation in a dextran sodium sulfate (DSS)-induced mouse model of colitis, supporting that CB2 receptor agonists might serve as potential therapeutics for treating colitis.
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