Transient Receptor Potential Channel Physiology and Pharmacology

Transient receptor potential (TRP) channels constitute a large superfamily of non-selective cation channels that detect a wide array of physical and chemical stimuli. Mammalian genomes encode seven principal TRP subfamilies—TRPA, TRPC, TRPM, TRPML, TRPN, TRPP and TRPV—each with distinct domain architectures and activation profiles. These channels are permeable to Ca2+, Na+ and other cations, and their opening underlies fundamental processes such as thermosensation, mechanosensation, nociception and osmoregulation. Structural biology has revealed conserved pore domains coupled to regulatory ankyrin or TRP helices, which transduce ligand binding, voltage and temperature changes into conformational shifts. Endogenous lipids, metabolites and reactive oxygen species modulate TRP gating, while exogenous agonists or antagonists allow precise pharmacological control. Aberrant TRP channel function contributes to pain syndromes, inflammatory disorders, metabolic diseases and cancer. Advances in cryo-electron microscopy, optogenetic lipid probes and selective small-molecule modulators have transformed our understanding of TRP physiology and opened new avenues for therapeutic intervention. The interplay between channel structure, lipid environment and downstream signalling continues to define TRP channels as versatile transducers and promising drug targets with global biomedical impact.

Research from Nature Portfolio

Recent studies have elucidated high-resolution structures of full-length TRPV2, revealing dual gating constrictions in upper and lower pore regions and highlighting isoform-specific features that distinguish TRPV2 from its vanilloid-sensitive relatives. These structural insights clarify how intrinsic pore dimensions and peripheral helices confer unique activation thresholds and pharmacological profiles. Parallel work has shown that TRPV1 expressed on cortical microglia serves as a detector of neuroinflammatory cues, controlling cytokine release and microvesicle shedding to modulate synaptic transmission. In models of neuropathic pain, neuronal TRPV1 further alters excitability and synaptic strength, positioning it as both sensor and mediator of central pain states. Additional research has identified a Schwann cell population in injured peripheral nerves where TRPA1 activation drives NADPH oxidase-dependent hydrogen peroxide release, sustaining macrophage infiltration and mechanical allodynia. These findings establish non-neuronal TRP channels as active participants in neuroimmune cross-talk and pain maintenance.

Transient Receptor Potential Channel Physiology and Pharmacology publication trend

The graph below shows the total number of articles in transient receptor potential channel physiology and pharmacology across all publications each year (not limited to Nature Index journals).

Technical terms

Transient receptor potential (TRP) channel: A superfamily of ion channels that permit passage of cations in response to diverse stimuli such as temperature, mechanical force, ligands or voltage changes.

Agonist: A molecule that binds to and stabilises the open or active conformation of an ion channel, promoting ion flux.

Antagonist: A compound that binds to a channel without activating it, preventing agonist-induced opening.

Cryo-electron microscopy (cryo-EM): A technique in which flash-frozen samples are imaged at cryogenic temperatures to resolve macromolecular structures at near-atomic resolution.

Allodynia: A pain response elicited by normally innocuous stimuli, often arising from aberrant sensory channel activity.

Neuroinflammation: Immune and glial responses within the nervous system that can modulate neuronal function and contribute to disease.

References

1. TRP (transient receptor potential) ion channel family: structures, biological functions and therapeutic interventions for diseases. Signal Transduction and Targeted Therapy (2023).
2. Structure of the full-length TRPV2 channel by cryo-EM. Nature Communications (2016).
3. TRPV1 channels are critical brain inflammation detectors and neuropathic pain biomarkers in mice. Nature Communications (2017).
4. Schwann cell TRPA1 mediates neuroinflammation that sustains macrophage-dependent neuropathic pain in mice. Nature Communications (2017).
5. TRPV1 and TRPA1 in cutaneous neurogenic and chronic inflammation: pro-inflammatory response induced by their activation and their sensitization. Protein & Cell (2017).
6. Identification of ML204, a Novel Potent Antagonist That Selectively Modulates Native TRPC4/C5 Ion Channels. Journal of Biological Chemistry (2011).