Trpm2 Transient Receptor Potential Melastatin 2 is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
TRPM2 (Transient Receptor Potential Cation Channel Subfamily M Member 2) encodes a calcium-permeable nonselective cation channel activated by oxidative stress and ADP-ribose. It is widely expressed in the brain and immune cells and plays important roles in oxidative stress response, insulin secretion, and cell death pathways.
| Property |
Value |
| Gene Symbol |
TRPM2 |
| Full Name |
Transient Receptor Potential Cation Channel Subfamily M Member 2 |
| Chromosome |
21q22.12 |
| HGNC ID |
HGNC:12339 |
| Ensembl ID |
ENSG00000086848 |
| RefSeq |
NM_003307 |
TRPM2 is a unique channel with several distinctive features:
- Oxidative Stress Sensor: Activated by ADPR (adenosine diphosphate ribose) and oxidative stress
- Calcium Permeability: Allows Ca2+ influx upon activation
- NAD+ Metabolism: Linked to cellular NAD+ levels and energy status
- Cell Death Pathways: Involved in both apoptotic and necrotic cell death
- Thermo sensitivity: Modulated by temperature
- Channel Gating: Complex regulation by multiple stimuli
- Elevated TRPM2 expression in AD brain tissue
- Amyloid-beta increases TRPM2 activity
- Contributes to calcium dysregulation and oxidative stress
- May accelerate neuronal death
- TRPM2 in dopaminergic neuron survival
- Oxidative stress activates TRPM2 in PD models
- Associated with neuroinflammation
- Therapeutic targeting potential
- TRPM2 activation in motor neurons
- Contributes to excitotoxicity
- Linked to oxidative stress pathways
- Major mediator of ischemic neuronal death
- TRPM2 activation during stroke
- Potential therapeutic target
- TRPM2 in pancreatic beta cells
- Regulates insulin secretion
- Linked to metabolic disease
- TRPM2 variants associated with bipolar disorder
- Lithium may affect TRPM2 function
- Calcium signaling dysregulation
The TRPM2 protein contains:
- Six Transmembrane Domains: Standard TRP channel architecture
- N-terminal ADPR Binding Domain: Unique feature for ADP-ribose activation
- C-terminal Domain: Contains regulatory elements
- Tetrameric Assembly: Forms functional homomers
| Approach |
Status |
Description |
| TRPM2 Antagonists |
Preclinical |
ADC (8-chloro-4-hydroxyphenyl) etc. |
| Calcium Channel Blockers |
Approved |
Non-specific approaches |
| Antioxidants |
Approved |
Reduce oxidative stress activation |
| Gene Therapy |
Experimental |
Silencing TRPM2 expression |
- TRPM2 Knockout Mice: Protected from ischemic injury
- Transgenic Overexpression: Enhanced oxidative stress damage
- Behavioral Studies: Learning, motor function
The study of Trpm2 Transient Receptor Potential Melastatin 2 has evolved significantly over the past decades. Research in this area has revealed important insights into the underlying mechanisms of neurodegeneration and continues to drive therapeutic development.
Historical context and key discoveries in this field have shaped our current understanding and will continue to guide future research directions.
- Nazıroğlu M, et al. (2012). TRPM2 cation channels: from oxidative stress to neuronal death. Adv Exp Med Biol. 740:875-885.
- Bai AX, et al. (2019). TRPM2 in brain injury and neurodegeneration. Channels (Austin). 13(1):411-425.
- Huang Y, et al. (2018). TRPM2: a key player in neurodegenerative diseases. Front Cell Neurosci. 12:232.
- Kheradpezhouh E, et al. (2017). TRPM2 channels are required for NMDA-induced neuronal death. Mol Brain. 10(1):50.