am1241

AM1241 是一种选择性大麻素 CB2 受体激动剂，Ki 为 3.4 nM，比 CB1 受体选择性高 82 倍。

(R)-AM1241 binds to cannabinoid (CB) receptors and has greater than 100-fold selectivity for the CB2 over the CB1 receptor (Kis = 15 and 5,000 nM, respectively, in a membrane assay using human receptors). (R)-AM1241 acts as an agonist at human CB2 receptors (EC50 = 118 nM) but an inverse agonist at rat and mouse CB2 receptors (EC50s = 315 and 341 nM, respectively). Similar to the racemate AM1241 , (R)-AM1241 produces antinociception to thermal, but not mechanical, pain in rats. The pain-reducing effect of (R)-AM1241 is blocked by the CB2-specific inhibitor SR 144528 but not by either the CB1-selective inhibitor rimonabant or the opioid receptor blocker naloxone .

(S)-AM1241 binds to cannabinoid (CB) receptors and is selective for the CB2 over the CB1 receptor (Kis = 658 and >10,000 nM, respectively, in a membrane assay using human receptors). (S)-1241 acts as an agonist at human, rat, and mouse CB2 receptors but shows greater activity at human CB2 (EC50 = 131 nM) than at rat and mouse CB2 receptors (EC50 = 785 and 2,000 nM, respectively). Similar to the racemate AM1241 , (S)-AM1241 produces antinociception to thermal, but not mechanical, pain in rats. The pain-reducing effect of (S)-AM1241 is blocked by the CB2-specific inhibitor SR 144528 but not by either the CB1-selective inhibitor rimonabant or the opioid receptor blocker naloxone .

CB2R激动剂, 其化学式为C25H28N6O3S，分子量为508.6 g mol。作为一种高效且具有选择性的CB2R激动剂，该化合物表现出在医疗研究中应用的潜力。其结构包含吡咯并[2,3-b]吡啶-3-胺环，与CB2受体的结合力强。在体外试验中，这种化合物的EC50值为22 nM，体现了其高度选择性。