Distinct functional open states of the polymodal nociceptor TRPV1.

TRPV1 channels stabilize functionally distinct open states with different conductance levels, driven by diverse stimuli, revealing a multistate gating process.

• Why it matters: Understanding how TRPV1 integrates various stimuli is crucial for developing targeted pain therapies, as its activation mechanisms influence nociceptive signaling and modulation.
• What they did: The study used single-channel recordings, anomalous mole fraction effect measurements, site-directed fluorescence, and structural modeling to identify multiple open states and their conformations in TRPV1.
• The result: Findings suggest that stimulus-specific pore conformations enable selective modulation of TRPV1, offering new opportunities for pain management by targeting distinct gating states.