MRS2578, an effective P2Y6 receptor antagonist with IC50 of 37 nM, shows insignificant inhibition at P2Y1, P2Y2, P2Y4, and P2Y11 receptors.

P2Y6:37 nM

MRS2578 selectively blocks P2Y6 receptor activity versus activity at P2Y1, P2Y2, P2Y4 or P2Y11 receptors. MRS2578 (1 μM) completely blocks the protection by UDP undergoing TNFalpha-induced apoptosis in 1321N1 astrocytoma cells. [1] MRS 2578 inhibits basal NF-κB activity in time and dose dependent manner in HMEC-1 cells transfected with 0.25 μg NF-κB promoter reporter. MRS 2578 (10 μM) completely abolishes TNF-α induced NF-κB reporter activity in HMEC-1 cells. MRS 2578 (10 μM) significant reduces TNF-α–induced proinflammatory gene expression in HMEC-1 cells. [2] MRS 2578 potentiates ATPγS and UDP response at concentrations below 316 nM whereas above this concentration, MRS 2578 inhibits ATPS- and UDP-induced IP accumulation in neonatal rat cardiac myofibroblasts. [3] MRS2578-treated mice shows reduced bronchial hyperresponsiveness toward methacholine in OVA-sensitized mice. MRS2578 completely blocks UDP-induced the release of IL-6, KC, and IL-8 in lung epithelial cells. [4]

MRS 2578 (10 μM) attenuates Keratinocyte-derived chemokine serum protein levels in LPS-induced vascular inflammation in C57BL/6 mice. [2] MRS2578 (10 μM, intratracheally) reduces BALF eosinophilia and the levels of IL-5 and IL-13 in the BALF in OVA-sensitized mice and leads to a markedly attenuated change in methacholine responsiveness after OVA challenge. MRS2578 (10 μM, intratracheally) inhibits house dust mite–induced allergic airway inflammation in OVA-sensitized mice. MRS2578 (10 μM, intratracheally) reduces of IL-6 and KC levels in BALF in OVA-sensitized mice. [4]