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

Transient receptor potential cation channel subfamily A member 1 (TRPA1) is a non-selective cation channel expressed predominantly in the plasma membrane of sensory neurons within the dorsal root, trigeminal, and nodose ganglia (UniProt Q6RI71). It serves as a key sensor for a wide array of noxious stimuli, including environmental irritants like allyl isothiocyanate, endogenous inflammatory mediators, and extreme cold (PubMed: 24337128). In the rat model, TRPA1 is extensively studied for its role in mediating inflammatory and neuropathic pain, as well as respiratory conditions like asthma and chronic cough (PubMed: 21247481). Activation of TRPA1 leads to the influx of calcium and sodium ions, resulting in neuronal depolarization and the release of neuropeptides such as substance P and calcitonin gene-related peptide (CGRP) (NCBI Gene: 312896). Pharmacological inhibition of TRPA1 has shown significant therapeutic potential in preclinical models for treating chronic pain and airway hyperreactivity (PubMed: 21646445). Understanding the rat-specific pharmacology is crucial for translating findings from rodent studies to human clinical applications, as species differences in sensitivity to certain antagonists have been documented (PubMed: 19052198).

Other names

ANKTM1Transient receptor potential ankyrin 1Wasabi receptorTrpa1_rat

TRPA1 modulators primarily act as antagonists to inhibit the influx of cations (Ca2+ and Na+), thereby reducing the activation of sensory neurons and alleviating pain and inflammation (IUPHAR/BPS Guide to Pharmacology). Some agonists, such as cinnamaldehyde, are used to induce desensitization or as pharmacological tools in research (PubMed: 24337128).