Transient receptor potential vanilloid type channel (TRPV channel)

Transient receptor potential vanilloid type channels (TRPV channels) are a subfamily of non-selective cation channels comprising six members (TRPV1–TRPV6). They exist as tetramers, with each subunit containing six transmembrane domains and large cytoplasmic N- and C-termini, often with ankyrin repeat domains[2][5]. These channels are primarily located on the plasma membrane and are structurally similar to voltage-gated potassium channels, forming a central ion conduction pore[2][4]. TRPV1–4 are polyselective cation channels preferring calcium over sodium ions and are heat-sensitive, mediating responses such as noxious heat and inflammatory pain. In contrast, TRPV5 and TRPV6 are highly selective for calcium and mainly facilitate epithelial calcium transport, crucial for calcium homeostasis[5]. TRPV channels are regulated by various endogenous and exogenous ligands (e.g., vanilloids like capsaicin for TRPV1), second messengers, phosphorylation events, and interacting proteins such as calmodulin[5]. Therapeutically, TRPV channels are critical drug targets for pain, inflammation, and disorders of calcium metabolism. However, targeting can lead to adverse effects like impaired temperature sensation or disrupted calcium balance. Their functional and expression profiles are increasingly used as biomarkers in translational research[5].

Other names

TRPV channelsVanilloid receptor channelsTRPV1-6 (members include TRPV1, TRPV2, TRPV3, TRPV4, TRPV5, TRPV6)VR1 (for TRPV1)VRL1 (for TRPV2)OLMS/VRL3 (for TRPV3)TRp12/VROAC/OTRPC4 (for TRPV4)ECaC1/CaT2 (for TRPV5)ECaC2/CaT1 (for TRPV6)

Modulation of channel opening (activation and/or inhibition) Blockage of ion permeation Desensitization leading to reduced neuronal excitability