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ID: ALA4014340
Journal: J Med Chem
Title: Identification of a Potent, Selective, and Efficacious Phosphatidylinositol 3-Kinase δ (PI3Kδ) Inhibitor for the Treatment of Immunological Disorders.
Authors: Liu Q, Shi Q, Marcoux D, Batt DG, Cornelius L, Qin LY, Ruan Z, Neels J, Beaudoin-Bertrand M, Srivastava AS, Li L, Cherney RJ, Gong H, Watterson SH, Weigelt C, Gillooly KM, McIntyre KW, Xie JH, Obermeier MT, Fura A, Sleczka B, Stefanski K, Fancher RM, Padmanabhan S, Rp T, Kundu I, Rajareddy K, Smith R, Hennan JK, Xing D, Fan J, Levesque PC, Ruan Q, Pitt S, Zhang R, Pedicord D, Pan J, Yarde M, Lu H, Lippy J, Goldstine C, Skala S, Rampulla RA, Mathur A, Gupta A, Arunachalam PN, Sack JS, Muckelbauer JK, Cvijic ME, Salter-Cid LM, Bhide RS, Poss MA, Hynes J, Carter PH, Macor JE, Ruepp S, Schieven GL, Tino JA.
Abstract: PI3Kδ plays an important role controlling immune cell function and has therefore been identified as a potential target for the treatment of immunological disorders. This article highlights our work toward the identification of a potent, selective, and efficacious PI3Kδ inhibitor. Through careful SAR, the successful replacement of a polar pyrazole group by a simple chloro or trifluoromethyl group led to improved Caco-2 permeability, reduced Caco-2 efflux, reduced hERG PC activity, and increased selectivity profile while maintaining potency in the CD69 hWB assay. The optimization of the aryl substitution then identified a 4'-CN group that improved the human/rodent correlation in microsomal metabolic stability. Our lead molecule is very potent in PK/PD assays and highly efficacious in a mouse collagen-induced arthritis model.
CiteXplore: 28541707