huwentoxin-iv

Selective NaV1.7 channel blocker. Preferentially inhibits neuronal NaV1.7, 1.2 and 1.3 (IC50 values are 26, 150 and 338 nM respectively), compared to muscle subtypes NaV1.4 and 1.5 (IC50 = >10 μM). Inhibits the channel by binding at the neurotoxin recepto

Huwentoxin-IV TFA is a potent, selective blocker of sodium channels, specifically inhibiting neuronal Nav1.7, Nav1.2, Nav1.3, and Nav1.4 with IC50 values of 26, 150, 338, and 400 nM, respectively. It preferentially targets the peripheral nerve subtype Nav1.7 by interacting with neurotoxin receptor site 4, demonstrating analgesic effects in animal models of inflammatory and neuropathic pain [1] [2].

m3-Huwentoxin IV (m3-HwTx-IV) is a potent inhibitor of sodium channels (NaV), with half-maximal inhibitory concentrations (IC50s) of 3.3 nM for hNaV1.7, 6.8 nM for hNaV1.6, 7.2 nM for hNaV1.3, 8.4 nM for hNaV1.1, 11.9 nM for hNaV1.2, and 369 nM for hNaV1.4 in the QPatch assay. It also alleviates spontaneous pain in a rodent model induced by the NaV1.7 activator OD1 in a dose-dependent manner [1].

mHuwentoxin-IV, a naturally modified form of Huwentoxin-IV, selectively inhibits tetrodotoxin-sensitive (TTX-S) voltage-gated sodium channels in dorsal root ganglion neurons with an IC50 value of 54.16 nM. Notably, the inhibitory effect of mHuwentoxin-IV on these sodium channels is unaffected by strong depolarization voltages [1].