A phenylthio-nicotinamide that acts as a high affinity P2X7 antagonist (pKi = 8.7 and 7.9, respectively, against 30nM A-804598 for rat and human P2X7 binding) and potently inhibits P2X7-dependent cellular Ca2+ mobilization (pIC50 = 8.3, 7.5, and 7.2, respectively, using 1321N1 expressing human, mouse, or rat P2X7; drug added 0.5 h prior to 3 min 0.25 mM BzATP stimulation), while exhibiting much reduced or little potency toward a panel of 50 ion channels, transporters, and receptors. Although not suitable for oral dosing due to high hepatic extraction ratios, effective delivery and brain P2X7 occupancy can be achieved via s.c. dosing in rats (30mg/kg) in vivo.
Formula:C28H32N4O2S
Primary Target:P2X7
Solubility:DMSO (100mg/ml)
Storage and Stability:May be stored at 4°C for short-term only. Aliquot to avoid repeated freezing and thawing. Store at -20°C. Aliquots are stable for 12 months. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.
