Transient receptor potential canonical 4 ion channel (TRPC4)

The **transient receptor potential canonical 4 ion channel (TRPC4)** is a non-selective, receptor-operated cation channel belonging to the TRP superfamily, specifically the canonical (TRPC) subfamily[1][4]. TRPC4 is activated downstream of phospholipase C-coupled G protein-coupled receptors (GPCRs) and receptor tyrosine kinases (RTKs), mediating Ca²⁺ and Na⁺ influx required for diverse cellular signaling processes[1][4]. It forms homo- or heterotetrameric complexes with other TRPCs and is directly regulated by both Gα_q/11_- and Gα_i/o_-linked pathways, as well as lipid signaling and nitric oxide[4]. Physiologically, TRPC4 plays key roles in endothelial function, regulation of vascular tone, neuronal excitability, and smooth muscle contractility[1][3][4]. Abnormal TRPC4 function has been associated with cardiovascular disease, barrier leakage, and cancer cell proliferation, making it a target for pharmacological modulation[1][3]. Experimentally, the channel can be modulated by small molecules such as Englerin A (agonist/activator) and ML204/2-APB (blockers)[2][3]. Its broad tissue expression and central roles in signaling impose significant therapeutic and safety considerations for clinical targeting[1][3][4].

Other names

Canonical transient receptor potential 4Transient receptor potential canonical channel 4TRPC4TrpC4TRP canonical 4

Inhibitors block cation entry by closing or occluding the channel pore. Activators such as Englerin A increase non-selective cation (Ca²⁺/Na⁺) influx by promoting channel opening. Channel activity is regulated by GPCR-initiated pathways (mainly Gα_q/11_-PLC and Gα_i/o_ direct activation), and receptor tyrosine kinase-initiated PLCγ signaling.