Calcium channel, voltage-dependent, T-type, subunit alpha-1H (Cav3.2)

The Cav3.2 T-type calcium channel (encoded by the CACNA1H gene) is a member of the voltage-gated calcium channel family characterized by low-voltage activation and transient kinetics[1][2]. It consists of a single pore-forming alpha-1H subunit that permits the influx of calcium ions in response to membrane depolarization, regulating neuronal excitability and secretory functions. Cav3.2 channels are found throughout the nervous system, heart, endocrine glands, and other excitable tissues[1][2][3]. They play pivotal roles in synaptic transmission, pacemaking activities, pain pathways, and hormone release[1][3][6]. Cav3.2 upregulation is associated with various disease states, particularly neuropathic pain, epilepsy, and hormone-related disorders. Selective pharmacological inhibition of Cav3.2 is a key therapeutic strategy under investigation for chronic pain and other indications, although safety and selectivity considerations remain critical challenges[3][6].

Other names

Cav3.2alpha-1H subunitCACNA1HT-type calcium channel α1H

Inhibition/blockade of Cav3.2 reduces pain signaling and neuronal excitability[3]. Drugs can block calcium entry by binding pore-forming subunit or modulating channel gating[3].