MRS2279

MRS2279 is a selective and high affinity P2Y1 receptor antagonist, with a Ki of 2.5 nM and an IC50 of 51.6 nM. MRS2279 competitively inhibits ADP-promoted platelet aggregation with an apparent affnity (pKB=8.05)[1][2].

Signaling Pathways >> GPCR/G Protein >> P2Y Receptor

Research Areas >> Neurological Disease

MRS2279 antagonized 2MeSADP-stimulated inositol phosphate formation in turkey erythrocyte membranes with competitive kinetics (pKB=7.75). High affinity competitive antagonism by MRS2279 was also observed at the human P2Y1 receptor (pKB=8.10) stably expressed in 1321N1 human astrocytoma cells. Antagonism was specific for the P2Y1 receptor since MRS2279 had no effect on activation of the human P2Y2, P2Y4, P2Y6, or P2Y11 receptors by their cognate agonists. MRS2279 also did not block the capacity of ADP to act through the Gi/adenylyl cyclase linked P2Y receptor of platelets to inhibit cyclic AMP accumulation[2].

[1]. Nandanan E, et al. Synthesis, biological activity, and molecular modeling of ribose-modified deoxyadenosine bisphosphate analogues as P2Y(1) receptor ligands. J Med Chem. 2000;43(5):829-842.

[2]. Boyer JL, et al, Ravi RG, Jacobson KA, Harden TK. 2-Chloro N(6)-methyl-(N)-methanocarba-2'-deoxyadenosine-3',5'-bisphosphate is a selective high affinity P2Y(1) receptor antagonist. Br J Pharmacol. 2002;135(8):2004-2010.