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Updated: Jul 3, 2026
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Published on: March 17, 2015
TRPC5 as a modulator of TRPV1 signalling in pathological pain states
Christian Müller1, Gerd Geisslinger2, Marco Sisignano2
1Goethe University Frankfurt, Faculty of Medicine, Institute of Clinical Pharmacology, Theodor Stern-Kai 7, Frankfurt am Main, 60590, Germany.
Neuropharmacology
|July 1, 2026
Summary
Transient Receptor Potential C5 (TRPC5) channels modulate Transient Receptor Potential V1 (TRPV1) activity, offering a new target for neuropathic pain. TRPC5 inhibition may reduce TRPV1-driven pain signaling.
Area of Science:
- Neuroscience
- Molecular Biology
- Pain Research
Background:
- Neuropathic pain is a debilitating condition with limited treatment options.
- Transient Receptor Potential (TRP) channels, including TRPC5 and TRPV1, are crucial in sensory perception and pain signaling.
- TRPV1 is known for its role in pain, while TRPC5 is emerging as a potential therapeutic target.
Purpose of the Study:
- To investigate the interaction between TRPC5 and TRPV1 in neuropathic pain.
- To explore the role of TRPC5 in modulating TRPV1 activity in sensory neurons.
Main Methods:
- Quantitative PCR (qPCR) to assess TRPC5 mRNA expression in dorsal root ganglia (DRG).
- Calcium imaging to observe the effects of TRPC5 modulators and inhibitors on TRPV1 activity.
- Förster Resonance Energy Transfer (FLIM-FRET) to confirm physical interaction between TRPC5 and TRPV1.
Main Results:
- TRPC5 mRNA expression was significantly upregulated in oxaliplatin-induced peripheral neuropathic pain (OIPN) models.
- Lysophosphatidylcholines (LPCs) and Hydroxyeicosatetraenoicacids (HETEs) were identified as endogenous TRPC5 modulators.
- TRPC5 inhibition reduced TRPV1-mediated calcium responses and prevented TRPV1 sensitization.
Conclusions:
- TRPC5 physically interacts with TRPV1 and acts as a key modulator of its activity.
- TRPC5 plays a significant role in nociceptive signaling in pathological pain states.
- Targeting TRPC5 offers a promising strategy for managing neuropathic pain by indirectly reducing TRPV1 hyperactivity.
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