| TRPV2 — Transient Receptor Potential Cation Channel Subfamily V Member 2 | |
|---|---|
| Symbol | TRPV2 |
| Full Name | Transient Receptor Potential Cation Channel Subfamily V Member 2 |
| Chromosome | 17p11.2 |
| NCBI Gene | 12404 |
| Ensembl | ENSG00000173372 |
| OMIM | 607949 |
| UniProt | Q9Y5S2 |
| Diseases | Alzheimer's Disease, Parkinson's Disease, Amyotrophic Lateral Sclerosis |
| Expression | Cerebral cortex, Hippocampus, Basal ganglia, Spinal cord, Peripheral sensory neurons |
TRPV2 (Transient Receptor Potential Cation Channel Subfamily V Member 2) is a non-selective calcium channel encoded by the TRPV2 gene located on chromosome 17p11.2. This channel belongs to the TRP (Transient Receptor Potential) superfamily of cation channels and plays important roles in calcium homeostasis, cellular signaling, and neurodegeneration [1][2].
TRPV2 is widely expressed in the central and peripheral nervous systems, where it participates in various physiological and pathological processes. Research has implicated TRPV2 in the pathogenesis of several neurodegenerative diseases, including Alzheimer's disease (AD), Parkinson's disease (PD), and amyotrophic lateral sclerosis (ALS) [3][4].
The TRPV2 gene spans approximately 39 kb and consists of 18 exons. The gene encodes a protein of 761 amino acids with a molecular weight of approximately 84 kDa. TRPV2 shares structural homology with other TRPV family members, featuring six transmembrane domains (S1-S6), a pore loop between S5 and S6, and intracellular N- and C-termini [5].
TRPV2 is highly expressed in:
The channel localizes primarily to the plasma membrane, where it functions as a calcium-permeable non-selective cation channel activated by various stimuli including mechanical stretch, heat, and endogenous ligands [6].
TRPV2 functions as a calcium-permeable channel that contributes to intracellular calcium signaling. Unlike TRPV1, which is activated by capsaicin and noxious heat (>43°C), TRPV2 is considered a thermosensitive channel activated by noxious heat (>52°C) and mechanical stimuli [7].
In healthy neurons, TRPV2 plays a dual role:
TRPV2 is also expressed in glial cells including astrocytes and microglia, where it participates in calcium signaling associated with neuroinflammation and glial-neuronal communication [8].
In Alzheimer's disease, TRPV2 expression is altered in brain regions affected by neurodegeneration:
Studies have shown that TRPV2-mediated calcium influx can:
TRPV2 may play a role in PD pathogenesis through:
In ALS, TRPV2 is implicated in:
TRPV2 represents a potential therapeutic target for neurodegenerative diseases:
Current research focuses on: