2-(1,3-DIMETHYL-2,6-DIOXO-1,2,3,6-TETRAHYDRO-7H-PURIN-7-YL)-N-(4-ISOPROPYLPHENYL)ACETAMIDE

Description

Transient receptor potential cation channel A₁ (TRPA1) is an ankyrin-like ion channel which acts as a sensor for chemical irritants, pain, and cold. It is activated by allyl isothiocyanate (AITC), formalin, hydrogen peroxide, tear gas, and other compounds. HC-030031 is a selective TRPA1 blocker, antagonizing TRPA1-mediated calcium influx induced by AITC and formalin (IC₅₀s = 6.2 and 5.3 μM, respectively). It does not block currents mediated by TRPV1, TRPV3, TRPV4 hERG, or Na_V1.2 channels. HC-030031 can be used in cells or delivered to animals orally, by inhalation, or by injection. Oral administration (100 mg/kg) of HC-030031 significantly reversed mechanical hypersensitivity in rat models of chronic inflammatory or neuropathic pain, while local injection (100 μg) into inflamed mouse hind paws attenuated mechanical, but not heat, hypersensitivity.

Chemical Properties

White Solid

Uses

A TRPA1 (transient receptor potential) selective antagonist, attenuates inflammatory- and neuropathy-induced mechanical hypersensitivity.

Biological Activity

Selective TRPA1 channel blocker that antagonizes AITC- and formalin-evoked calcium influx (IC 50 values are 6.2 and 5.3 μ M respectively). Does not block currents mediated by TRPV1, TRPV3, TRPV4, hERG or Na V 1.2 channels. Inhibits AITC- and formalin-induced flinching in vivo .

Biochem/physiol Actions

HC-030031 is a selective TRPA1 channel blocker, antagonizing formalin-evoked calcium influx and formalin-induced pain. IC50 is 5 μM. TRPA1 antagonism is a promising therapeutic target for chronic inflammatory or neurogenic pain.

storage

Room temperature

References

1) McNamara et al. (2007), TRPA1 mediates formalin-induced pain; Proc. Natl. Acad. Sci., 104 13525