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Target intelligence / Profile preview
P2X Ligand-Gated Ion Channel 3 (P2X3 receptor)
- Target
- P2X3 receptor
- Molecular classification
- Ion channel, Ligand-gated ion channel
01
Overview
The human P2X ligand-gated ion channel 3 is a trimeric non-selective cation channel activated by extracellular ATP. It plays essential roles in nociceptive signaling within sensory neurons and represents an important therapeutic target for conditions involving chronic pain or hypersensitivity due to its unique structure-function properties—including rapid desensitization kinetics, divalent cation regulation of activation/desensitization cycles, and druggable allosteric sites amenable to small molecule inhibition.
- Other names
- P2X3P2X3 receptorP2RX3
02
Mechanism of action
Antagonism or allosteric modulation of P2X3 receptor, inhibiting ATP-mediated channel opening and reducing neuronal excitability
03
Biological functions
NociceptionSensory transductionPain signalingInflammationSensory neuron excitability
04
Disease associations
Chronic painNeuropathic painChronic coughInflammationSensory hypersensitization
05
Safety considerations
Potential for off-target effects due to structural similarities with other P2X receptorsDesensitization of the receptor upon prolonged agonist exposurePossible side effects related to modulating sensory neuron function
06
Interacting drugs
ATP
4 more in the full profile.
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