TRPV4 channels reveal brain’s stop-scratching signal
Researchers show that TRPV4 channels in touch‑sensitive neurons participate in a negative feedback signal telling the brain scratching has provided enough relief, effectively acting as a neural “stop scratching” switch. In mice engineered to lack TRPV4 in sensory neurons, scratching episodes were fewer but lasted longer, implying that targeted neuronal pathways—not blanket TRPV4 blockade—could be key for treating chronic itch.
