Potassium voltage-gated channel subfamily D member 2 (Kv4.2) (Kv4.2)

The Potassium voltage-gated channel subfamily D member 2 (Kv4.2) is a primary pore-forming subunit responsible for the transient, rapidly inactivating A-type potassium current (IA) in the central nervous system (UniProt: Q9NZV8). It is highly expressed in the dendrites of hippocampal and cortical pyramidal neurons, where it plays a critical role in regulating dendritic excitability, signal integration, and the back-propagation of action potentials (PubMed: 11069951). Dysregulation or mutations in the KCND2 gene are linked to neurological disorders such as temporal lobe epilepsy and autism spectrum disorder, as well as neurodegenerative conditions like Alzheimer's disease (PubMed: 24501277). Pharmacological targeting of Kv4.2 aims to modulate neuronal firing rates, with research focusing on both small-molecule inhibitors for pain management and activators for seizure control (PubMed: 30104290). However, drug development is challenged by the need for subtype selectivity to avoid cross-reactivity with other Kv4 family members and potential cardiac side effects (PubMed: 15131254).

Other names

KCND2Shal1RK5Voltage-gated potassium channel subunit Kv4.2

Modulation of voltage-gated potassium currents, specifically the transient outward A-type current (IA), through pore blockade or stabilization of specific channel states (PubMed: 15131254).