Novel Agonists and Antagonists for Human Protease Activated Receptor 2

作者：Barry Grant D; Suen Jacky Y; Le Giang T; Cotterell Adam; Reid Robert C; Fairlie David P^*

来源：Journal of Medicinal Chemistry, 2010, 53(20): 7428-7440.

DOI：10.1021/jm100984y

Human protease activated receptor 2 (PAR2) is a G protein-coupled receptor that is associated with inflammatory diseases and cancers. PAR2 is activated by serine proteases that cleave its N-terminus and by synthetic peptides corresponding to the new N-terminus. Peptide agonists are widely used to characterize physiological roles for PAR2 but typically have low potency (e.g., SLICK V-NH(2), SLIGRL-NH(2)), uncertain target selectivity, and poor bioavailability, limiting their usefulness for specifically interrogating PAR2 in vivo. Structure-activity relationships were used to derive new PAR2 agonists and antagonists containing nonpeptidic moieties. Agonist GB110 (19, EC(50) 0.28 mu M) selectively induced PAR2-, but not PAR1-, mediated intracellular Ca(2+) release in HT29 human colorectal carcinoma cells. Antagonist GB83 (36, IC(50) 2 mu M) is the first compound at micromolar concentrations to reversibly inhibit PAR2 activation by both proteases and other PAR2 agonists (e.g., trypsin, 2f-furoyl-LIGRLO-NH(2), 19). The new compounds are selective for PAR2 over PAR1, serum stable, and suitable for modulating PAR2 in disease models.

• 出版日期2010-10-28