Key result
(R)-L3 activates Kv7.1 channels via two independent mechanisms: allosteric modulation of the pore domain to increase current amplitude and electro-mechanical uncoupling to alter gating kinetics.
Why the study?
The benzodiazepine (R)-L3 potently activates Kv7.1 channels, but the molecular mechanisms underlying modulation by (R)-L3 were unknown.
The study provides structural and functional evidence that (R)-L3 activates Kv7.1 channels via two independent mechanisms, offering insights for drug development in long QT syndrome.
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May inform Kv7.1-targeted therapies for long QT syndrome; leaves open translation from animal models to clinical use.
A 2021 study studied Long QT syndrome (preclinical model). (R)-L3 vs. Vehicle/Control was evaluated on Kv7.1 channel current amplitude and gating kinetics. (R)-L3 activates Kv7.1 channels via two independent mechanisms: allosteric modulation of the pore domain to increase current amplitude and electro-mechanical uncoupling to alter gating kinetics.