MRS2179 (ammonium salt)

MRS2179 is a competitive purinergic P2Y1 receptor antagonist (Kb = 102 nM).[1] It is selective for P2Y1 over P2Y2, P2Y4, P2Y6, P2Y12, and P2Y13, as well as P2X1-4, receptors at 10 µM.2,3 MRS2179 reduces phospholipase C (PLC) activity induced by the P2Y receptor agonist 2-methylthioadenosine diphosphate with an IC50 value of 331 nM in turkey erythrocyte membranes that endogenously express high levels of the P2Y1 receptor.[1] It inhibits platelet shape change and aggregation induced by ADP in washed isolated human platelets when used at a concentration of 10 µM.[4] MRS2179 (50 mg/kg, i.v.) prolongs the length of tail bleeding time in mice, as well as decreases platelet thrombus formation in a mouse model of iron chloride-induced arterial thrombosis.[4],[5]

Reference:
[1]. Nandanan, E., Camaioni, E., Jang, S.-Y., et al. Structure-activity relationships of bisphosphate nucleotide derivatives as P2Y1 receptor antagonists and partial agonists. J. Med. Chem. 42(9), 1625-1638 (1999).
[2]. von Kügelgen, I. Pharmacological profiles of cloned mammalian P2Y-receptor subtypes. Pharmacol. Ther. 110(3), 415-432 (2006).
[3]. Brown, S.G., King, B.F., Kim, Y.-C., et al. Activity of novel adenine nucleotide derivatives as agonists and antagonists at recombinant rat P2X receptors. Drug Dev. Res. 49(4), 253-259 (2000).
[4]. Tovar, C., Higgins, B., Deo, D.D., et al. Small-molecule inducer of cancer cell polyploidy promotes apoptosis or senescence: Implications for therapy. Cell Cycle 9(16), 3364-3375 (2010).
[5]. Lenain, N., Freund, M., Léon, C., et al. Inhibition of localized thrombosis in P2Y1-deficient mice and rodents treated with MRS2179, a P2Y1 receptor antagonist. J. Thromb. Haemost. 1(6), 1144-1149 (2003).