GW791343 HCl

GW791343 HCl是GW791343的盐酸盐形式，是一种非竞争性的人类P₂X₇ receptor变构抑制剂，pIC50为7。In cells expressing human P₂X₇ receptors, GW 791343 inhibits agonist-stimulated ethidium accumulation in both sucrose and NaCl buffer. In NaCl buffer, GW 791343 reduces the maximal response to both ATP and BzATP, but there is little effect on agonist potency except for a decrease in the presence of 300–1000 nM GW 791343. GW 791343 also reduces maximal responses to ATP and BzATP in sucrose buffer, although this effect is more marked when using ATP as agonist. In sucrose buffer, GW 791343 produces a slight decrease in ATP potency at 300 nM. GW 791343 decreases BzATP potency at concentrations of 300 nM to 10 μM. A more marked increase in agonist effect is observed when using ATP as agonist in NaCl buffer with GW791343 increasing the pEC50 and maximal response to ATP at concentrations of 10 and 30 μM. In sucrose buffer, GW791343 also increases responses when using ATP as agonist. GW791343 inhibits responses at the human–rat chimeric receptor in both sucrose and NaCl buffer. GW791343 increases responses to BzATP at the F95L mutant receptor. GW791343 is a non-competitive antagonist and negative allosteric modulator at the human P₂X₇ receptor; however, GW 791343 also acts as a positive allosteric modulator at the rat P₂X₇ receptor. At the dog P2X7 receptor, GW 791343 is an antagonist with similar potency to that determined at the human receptor.