A-784168，25MG，SML3922-25MG，Sigma

Biochem/physiol Actions

Brain-penetrant, orally active, potent and selective transient receptor potential cation channel TRPV1 antagonist with in vivo analgesia efficacy.

A-784168 is a brain-penetrant, orally active, potent and selective transient receptor potential (TRP) cation channel TRPV1 antagonist (IC50 = 25/14/33.7/35.1 nM against TRPV1 activation by 50 nM capsaicin/pH 5.5/3 µM NADA/10 µM anandamide in human TRPV1 tranfectants) with little activity or affinity toward other TRP channels and a panel of 74 neurotransmitter receptors. A-784168 reduces capsaicin-induced acute pain (ED50 = 10 µmol/kg p.o. 1h before capsaicin intraplantar injection) and CFA paw injection-induced chronic inflammatory thermal hyperalgesia (EC50 = 54 nmol) in rats in vivo.