protx ii

Selective NaV1.7 channel blocker. Shifts activation gating positively and decreases current magnitude. Displays 100-fold selectivity over other sodium channel subtypes.

ProTx-II TFA is a potent and highly selective Nav1.7 sodium channel blocker, exhibiting an IC50 of 0.3 nM and demonstrating at least 100-fold selectivity over other sodium channel subtypes. It decreases channel conductance, shifts activation towards more positive potentials, and inhibits action potential propagation in nociceptors [1] [2].

Potent Nav1.7 blocker (IC50 = 2.5 nM). Also inhibits Nav1.1, Nav1.2, Nav1.3 and Nav1.6 in the nanomolar range. Exhibits no effects on Cav channels or nAChR at 5 μM. Demonstrates analgesic activity in vivo; antagonizes effects of scorpion-venom toxin OD1 a

ProTx-III, a spider venom peptide derived from the Peruvian green velvet tarantula, functions as a selective and potent inhibitor of the voltage-gated sodium channel Na v 1.7, exhibiting an IC 50 of 2.1 nM. Characterized by its inhibitor cystine knot motif (ICK), ProTx-III can attenuate the pain response and is applicable in research on chronic pain, epilepsy, and arrhythmia [1].