Voltage-gated and receptor-operated calcium channels (VGCC/ROCC)

Voltage-gated and receptor-operated calcium channels are essential membrane proteins that facilitate the entry of calcium ions (Ca2+) into cells, acting as key transducers of electrical and chemical signals. Voltage-gated calcium channels (VGCCs) respond to membrane depolarization and are classified into several subtypes (L, T, N, P/Q, and R) that mediate functions such as muscle contraction, neurotransmitter release, and pacemaking (Catterall, 2011). Receptor-operated calcium channels (ROCCs) are activated by the binding of extracellular ligands or through intracellular signaling cascades, playing vital roles in synaptic transmission and cellular homeostasis (Putney, 1990). These channels are critical in the pathophysiology of various conditions, including hypertension, cardiac arrhythmias, chronic pain, and neurodegenerative disorders (StatPearls, 2023). Pharmacological agents targeting VGCCs, such as dihydropyridines, are widely used to manage cardiovascular diseases by inducing vasodilation and reducing cardiac workload. Meanwhile, modulators of ROCCs, such as NMDA receptor antagonists, are employed in treating neurological conditions and as anesthetic agents (IUPHAR/BPS Guide to Pharmacology).

Other names

VOCCROCCVoltage-dependent calcium channelsLigand-gated calcium channelsCalcium channels

Inhibition of calcium ion influx through the channel pore or modulation of channel gating to decrease intracellular calcium levels and attenuate downstream physiological responses.