TRPC4 (Transient Receptor Potential Cation Channel Subfamily C Member 4) is a non-selective calcium-permeable cation channel belonging to the TRPC (Transient Receptor Potential Canonical) family. It plays important roles in neuronal signaling, neuroprotection, and various brain functions.
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| Symbol | TRPC4 |
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| Full Name | Transient Receptor Potential Cation Channel Subfamily C Member 4 |
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| Chromosomal Location | Chromosome 13q13.3 |
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| NCBI Gene ID | [7224](https://www.ncbi.nlm.nih.gov/gene/7224) |
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| OMIM | [603299](https://www.omim.org/entry/603299) |
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| Ensembl ID | ENSG00000133189 |
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| UniProt ID | [Q9H9N0](https://www.uniprot.org/uniprot/Q9H9N0) |
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| Associated Diseases | Neurodevelopmental disorders, Epilepsy, Anxiety disorders |
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TRPC4 forms non-selective cation channels that are primarily activated by G-protein-coupled receptor (GPCR) signaling through phospholipase C (PLC). The channel conducts Ca²⁺ and Na⁺ ions, leading to membrane depolarization and activation of downstream signaling cascades 1.
Key functional characteristics:
- Gating Mechanism: Activated by diacylglycerol (DAG) and mechanical stretch 2
- Expression Pattern: Widely expressed in the brain, particularly in hippocampal neurons, cortical pyramidal cells, and cerebellar granule cells 3
- Physiological Roles: Regulation of neuronal excitability, neurotransmitter release, synaptic plasticity, and neuroprotection 4
- Interaction Partners: Associates with TRPC5 to form heteromeric channels, interacts with calmodulin and PLC isoforms 5
- Epilepsy: TRPC4 variants have been linked to idiopathic generalized epilepsy 6
- Anxiety Disorders: Reduced TRPC4 expression associated with anxiety-like behaviors in mouse models 7
- Neurodevelopmental Disorders: De novo mutations identified in patients with intellectual disability 8
- Ischemic Stroke: TRPC4 activation mediates neuroprotective signaling in cerebral ischemia 9
- Parkinson's Disease: Altered TRPC4 expression in dopaminergic neurons may affect neuronal survival 10
TRPC4 shows high expression in:
- Hippocampus: CA1-CA3 pyramidal neurons, dentate gyrus granule cells
- Cerebral Cortex: Layer II-IV pyramidal neurons
- Cerebellum: Granule cells and Purkinje cells
- Thalamus: Relay neurons
The channel is predominantly localized to dendritic membranes and contributes to synaptic integration and plasticity 11.
TRPC4 represents a potential therapeutic target for:
- Anxiety and Depression: TRPC4 agonists may have anxiolytic effects 12
- Epilepsy: Modulation of TRPC4 activity may reduce seizure frequency 13
- Ischemic Neuroprotection: TRPC4 activators could protect neurons during stroke 14