Potent and reversible Kv3.4 potassium channel blocker (IC50 = 47 nM); also attenuates inactivation of sodium currents by acting on Nav1.7 and Nav1.3 channels. Enhances TTX-sensitive sodium currents in rat small dorsal root ganglion neurons. Neuroprotective.
Neurotensin-related hexapeptide exists in retinal ganglion cells and in their central projections in pigeons and may be utilized as a neuroactive substance by the central terminals of numerous retinal ganglion cells in birds.