Potassium voltage-gated channel subfamily C member 2 and member 4 (Kv3.2 and Kv3.4)

Voltage-gated potassium channels Kv3.2 (KCNC2) and Kv3.4 (KCNC4) are members of the Shaw-related subfamily, distinguished by their high activation thresholds and ultra-fast gating kinetics. These unique biophysical properties allow them to mediate rapid repolarization of action potentials, which is essential for the high-frequency firing (fast-spiking) phenotype of specific neuronal populations, such as parvalbumin-positive GABAergic interneurons in the cortex and hippocampus. Kv3.2 is primarily localized in the central nervous system and plays a critical role in maintaining the balance between excitation and inhibition; its dysfunction is linked to schizophrenia, epilepsy, and hearing disorders. Kv3.4 is expressed in both the brain and peripheral sensory neurons, such as dorsal root ganglion (DRG) cells, where it regulates nociceptive signaling and has been implicated in the pathogenesis of Alzheimer's and Parkinson's diseases. Therapeutic development focuses on positive allosteric modulators (PAMs), such as the AUT series of compounds, which aim to restore neuronal firing patterns in neuropsychiatric conditions. Conversely, Kv3.4 inhibition is explored as a strategy for managing chronic pain and neurodegeneration.

Other names

KCNC2KCNC4Voltage-gated potassium channel Kv3.2Voltage-gated potassium channel Kv3.4Shaw-related subfamily member 2Shaw-related subfamily member 4Raw3hKCNC2hKCNC4

Positive allosteric modulation (PAM) of Kv3.1/3.2 channels; Voltage-gated channel blocking; Gating modification