The effects of A-317567 on three distinct types of native ASIC currents evoked in acutely dissociated adult rat dorsal root ganglion (DRG) neurons are studied. A-317567 equipotently blocks the sustained phase of ASIC3-like current, a biphasic current akin to cloned ASIC3, which is predominant in DRG[2]. A-317567 produces concentration-dependent inhibition of all pH 4.5-evoked ASIC currents with an IC50 ranging between 2 and 30 μM, depending upon the type of ASIC current activated.

A-317567 is fully analgesic effects in the CFA model (ED50 of 17 μmol/kg, i.p., adult male Sprague-Dawley rats) and it has no significant effect on the withdrawal latency of the contralateral paw under these conditions[2].