Capsazepine

Описание

Transient receptor potential vanilloid type 1 (TRPV1) is a member of the transient receptor potential (TRP) family that is activated or sensitized by a variety of endogenous stimuli as a result of tissue injury and inflammation. TRPV1 is upregulated during inflammation and plays a role in the perception of pain. Capsazepine is a competitive antagonist of transient receptor potential vanilloid type 1 (TRPV1) which blocks the capsaicin-induced uptake of Ca²⁺ in neonatal rat dorsal root ganglia with an IC₅₀ of 0.42 μM and Chinese hamster ovary cells with an IC₅₀ of 17 nM. It does not block acid- or heat-induced activation of TRPV1 and may block receptors other than TRPV1.

Химические свойства

Light Yellow Solid

Использование

Capsazepine is shown to inhibit the development of mechanical hyperalgesia induced by intraplanar capsaicin injection. Capsazepine is described to block Resiniferatoxin (sc-24015)- and Capsaicin-induced contractions of guinea pig treacheal smooth muscle. Studies investigating the function of the VR1 (TRPV1 receptor) have employed Capsazepine as a tool for perturbing systemic neuronal response to Capsaicin.

Определение

ChEBI: A benzazepine that is 2,3,4,5-tetrahydro-1H-2-benzazepine which is substituted by hydroxy groups at positions 7 and 8 and on the nitrogen atom by a 2-(p-chlorophenyl)ethylaminothiocarbonyl group. A synthetic analogue of caps icin, it was the first reported capsaicin receptor antagonist.

Опасность

A poison.

Биологическая активность

Selective vanilloid receptor antagonist (K i = 3.2 μ M). Inhibits carrageenan inflammation-induced hyperalgesic responses in the rat. Also activates amiloride-sensitive epithelial Na + channel ENaC δ . Also available as part of the Vanilloid TRPV1 Receptor Tocriset™ .