Calcium-permeable ion channels (Ca2+ channels)

Calcium-permeable ion channels, which include both voltage-gated calcium channels (VGCCs) and ligand-gated ion channels (LGICs) such as NMDA receptors, are essential mediators of cellular signaling by allowing the influx of Ca2+ ions into the cytoplasm. These channels are found in various tissues, where they regulate critical functions including neurotransmitter release, muscle contraction, and gene transcription (Catterall, 2011, Cold Spring Harbor Perspectives in Biology). In the nervous system, VGCCs like Cav2.2 are vital for synaptic transmission, while ligand-gated channels like NMDA receptors are central to synaptic plasticity and memory (Traynelis et al., 2010, Pharmacological Reviews). Dysfunction in these channels is associated with a wide array of diseases, such as hypertension, cardiac arrhythmias, chronic pain, and neurodegenerative disorders like Alzheimer's disease (Zamponi et al., 2015, Pharmacological Reviews). Pharmacological agents targeting these channels are diverse, ranging from dihydropyridine calcium channel blockers for cardiovascular health to NMDA receptor antagonists for neurological conditions (Alexander et al., 2021, British Journal of Pharmacology). However, the broad expression and fundamental role of calcium signaling necessitate high drug selectivity to minimize adverse effects like hypotension or cognitive dysfunction.

Other names

Voltage-gated calcium channelsLigand-gated calcium channelsVGCCLGCCCalcium-conducting ion channelsVoltage-dependent calcium channels

Inhibition of ion conductance through the channel pore or allosteric modulation of channel gating to reduce calcium influx into the cytoplasm (Alexander et al., 2021, British Journal of Pharmacology).