PMID- 19576173 OWN - NLM STAT- MEDLINE DCOM- 20090820 LR - 20091119 IS - 1090-2104 (Electronic) IS - 0006-291X (Linking) VI - 387 IP - 2 DP - 2009 Sep 18 TI - Pharmacological characterization of INCB3344, a small molecule antagonist of human CCR2. PG - 251-5 LID - 10.1016/j.bbrc.2009.06.135 [doi] AB - The chemokine receptor 2 (CCR2) directs migration of monocytes and has been proposed to be a drug target for chronic inflammatory diseases. INCB3344 was first published as a small molecule nanomolar inhibitor of rodent CCR2. Here, we show that INCB3344 can also bind human CCR2 (hCCR2) with high affinity, having a dissociation constant (K(d)) of approximately 5nM. The binding of the compound to the receptor is rapid and reversible. INCB3344 potently inhibits hCCR2 binding of monocyte chemoattractant protein-1 (MCP-1) and MCP-1-induced signaling and function in hCCR2-expressing cells, including ERK phosphorylation and chemotaxis, and is competitive against MCP-1 in vitro. INCB3344 also blocks MCP-1 binding to monocytes in human whole blood, with potency consistent with in vitro studies. The whole blood binding assay described here can be used for monitoring pharmacodynamic activity of CCR2 antagonists in both preclinical models and in the clinic. FAU - Shin, Niu AU - Shin N AD - Department of In Vitro Biology, Incyte Corporation, Wilmington, DE, United States. FAU - Baribaud, Frederic AU - Baribaud F FAU - Wang, Kathy AU - Wang K FAU - Yang, Genjie AU - Yang G FAU - Wynn, Rich AU - Wynn R FAU - Covington, Maryanne B AU - Covington MB FAU - Feldman, Patricia AU - Feldman P FAU - Gallagher, Karen B AU - Gallagher KB FAU - Leffet, Lynn M AU - Leffet LM FAU - Lo, Yvonne Y AU - Lo YY FAU - Wang, Anlai AU - Wang A FAU - Xue, Chu-Biao AU - Xue CB FAU - Newton, Robert C AU - Newton RC FAU - Scherle, Peggy A AU - Scherle PA LA - eng PT - Journal Article DEP - 20090701 PL - United States TA - Biochem Biophys Res Commun JT - Biochemical and biophysical research communications JID - 0372516 RN - 0 (CCR2 protein, human) RN - 0 (Chemokine CCL2) RN - 0 (INCB3344) RN - 0 (Pyrrolidines) RN - 0 (Receptors, CCR2) RN - EC 2.7.11.24 (Extracellular Signal-Regulated MAP Kinases) SB - IM MH - Biological Assay MH - Cells, Cultured MH - Chemokine CCL2/metabolism MH - Chemotaxis MH - Extracellular Signal-Regulated MAP Kinases/metabolism MH - Flow Cytometry/methods MH - Humans MH - Leukocytes, Mononuclear/drug effects/metabolism MH - Phosphorylation MH - Pyrrolidines/metabolism/*pharmacology MH - Receptors, CCR2/*antagonists & inhibitors EDAT- 2009/07/07 09:00 MHDA- 2009/08/21 09:00 CRDT- 2009/07/07 09:00 PHST- 2009/06/25 00:00 [received] PHST- 2009/06/29 00:00 [accepted] PHST- 2009/07/07 09:00 [entrez] PHST- 2009/07/07 09:00 [pubmed] PHST- 2009/08/21 09:00 [medline] AID - S0006-291X(09)01302-3 [pii] AID - 10.1016/j.bbrc.2009.06.135 [doi] PST - ppublish SO - Biochem Biophys Res Commun. 2009 Sep 18;387(2):251-5. doi: 10.1016/j.bbrc.2009.06.135. Epub 2009 Jul 1.