A-740003 是一种选择性和竞争性的P2X7 受体拮抗剂，抑制大鼠和人的 P2X7 受体，IC50值分别为 18 和 40 nM。

A 740003 is an effective and specific P2X7 receptor antagonist (IC50: 18/40 nM, for rat/human). It can reduce nociception in animal models of persistent neuropathic and inflammatory pain, and also reduce neuroblastoma tumor growth in mice.

A 438079 or A 740003 (10 μM) significantly blocks the sustained phase of the BzATP-induced response[1]. A-740003 infusion reduces SE-induced TNF-α expression in dentate granule cells. A-740003 infusions increases SE-induced neuronal death[2]. A-740003 and A-438079 show significantly greater potency in blocking P2X7 receptor activation across all species compared with other antagonists. A-740003 and A-438079 show greater activity at rat and human, as compared with mouse P2X7 receptors[3]. A-740003 potently blocks agonist-evoked IL-1β release with (IC50=156 nM) and pore formation (IC50=92 nM) in differentiated human THP-1 cells[4].

Systemic administration of A-740003 produces dose-dependent antinociception in a spinal nerve ligation model (ED50=19 mg/kg i.p.) in the rat. A-740003 also attenuates tactile allodynia in two other models of neuropathic pain, chronic constriction injury of the sciatic nerve and vincristine-induced neuropathy. In addition, A-740003 effectively reduces thermal hyperalgesia observed following intraplantar administration of carrageenan or complete Freund's adjuvant (ED50=38-54 mg/kg i.p.). A-740003 is ineffective in attenuating acute thermal nociception in normal rats and does not alter motor performance at analgesic doses[4].

861393-28-4

C26H30N6O3

474.565

A 740003

DMSO:9.5 mg/mL(20 mM)
Powder: -20°C for 3 years
In solvent: -80°C for 2 years