A-317491 是选择性和非核苷酸的P2X3和P2X2/3受体的拮抗剂，通过阻断 P2X3和 P2X2/3受体介导的钙通量减轻炎性和神经性疼痛。它对其他 P2 受体和神经递质受体，离子通道以及酶具有高度选择性，IC50大于10 μM。

A-317491 is a non-nucleotide P2X3 ( Ki: 22 nM) and P2X2/3 receptor (Ki: 9 nM) antagonist, which inhibits calcium flux mediated by the receptors.

A-317491 blocks recombinant human and rat P2X3 and P2X2/3 receptor-mediated calcium flux (Ki = 22-92 nM) and is highly selective (IC50 >10 μM) over other P2 receptors and other ion channels, neurotransmitter receptors, and enzymes [1].

A-317491 dose-dependently reduces complete Freund's adjuvant-induced thermal hyperalgesia in the rat (ED50: 30 μmol/kg s.c.). A-317491 is most potent in attenuating both thermal hyperalgesia and mechanical allodynia after chronic nerve constriction injury (ED50: 10-15 μmol/kg s.c.). Although active in chronic pain models, A-317491 is ineffective in reducing nociception in animal models of acute pain, postoperative pain, and visceral pain (ED50 >100 μmol/kg s.c.) [1]. A-317491 is effective in reducing pain associated behavior in several animal models of inflammatory and neuropathic pain when administered systemically [2].

475205-49-3

C33H27NO8

565.57

ABT 202

DMSO:47 mg/mL (83.10 mM)
H2O:< 0.1 mg/mL (insoluble)
Ethanol:90 mg/mL (159.13 mM)
H2O:Insoluble
Powder: -20°C for 3 years
In solvent: -80°C for 2 years