Transient receptor potential vanilloid 1, Piezo-type mechanosensitive ion channel component 2, and P2X purinoceptor 3 neuroimmune axis (TRPV1/Piezo2/P2X3)

This target complex comprises three distinct ion channels—Transient receptor potential vanilloid 1 (TRPV1), Piezo-type mechanosensitive ion channel component 2 (Piezo2), and P2X purinoceptor 3 (P2X3)—integrated within local neuroimmune pathways. TRPV1 serves as a polymodal sensor for noxious heat, protons, and vanilloids, playing a central role in thermal hyperalgesia (Caterina et al., 1997; UniProt P35497). Piezo2 is the primary transducer of mechanical stimuli, essential for light touch and proprioception, and is implicated in mechanical allodynia (Coste et al., 2010; UniProt Q9H5I5). P2X3 is an ATP-gated channel expressed on sensory neurons that mediates pain and the urge to cough following tissue injury (Burnstock, 2018; UniProt P56373). The interaction of these channels with local neuroimmune pathways involves the release of neuropeptides and cytokines that sensitize peripheral nociceptors, creating a state of chronic hypersensitivity (Pinho-Ribeiro et al., 2017). Pharmacological targeting of this axis, such as through P2X3 antagonists like Gefapixant or TRPV1 agonists like Capsaicin, aims to modulate sensory input to treat conditions like chronic refractory cough and neuropathic pain.

Other names

Nociceptive ion channel complexSensory neuroimmune pathwayPeripheral pain signaling axisTRPV1-Piezo2-P2X3 triad

Antagonism or desensitization of sensory ion channels to inhibit the transmission of noxious stimuli and disrupt the inflammatory feedback loop between neurons and immune cells.