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Transient receptor potential cation channel subfamily A member 1 (TRPA1)

Target: TRPA1
Molecular classification: Ion channel, TRP channel family

Overview

TRPA1 is a non-selective cation channel that functions as a sensor for pain, cold temperature, itch, and environmental irritants. It plays a central role in pain signaling pathways triggered by inflammation or reactive chemicals and is implicated in chronic pain, cough hypersensitivity syndromes, asthma exacerbations, itch disorders, and potentially hearing/balance dysfunctions. TRPA1 is considered a promising therapeutic target for analgesics or anti-inflammatory drugs.

Other names: Transient receptor potential ankyrin 1The Mustard and Wasabi Receptor

Mechanism of action

Electrophilic irritants covalently modify cysteine residues within an intracellular "allosteric nexus" domain, inducing conformational changes that open the pore for cation influx. Calcium ions modulate potentiation/desensitization.

Biological functions

Pain (nociception)Cold temperature sensingItch sensationEnvironmental irritant sensingOxygen concentration perceptionCough reflexesMechanosensationBalance

Disease associations

Chronic painCough hypersensitivity syndromesAsthma exacerbationsItch disordersHearing/balance dysfunctionsInflammation

Safety considerations

Incompletely characterized binding sites for antagonists/blockersPotential off-target effects due to broad expression and function as an irritant detector

Interacting drugs

Allyl isothiocyanate (mustard oil)

3 more in the full profile.

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