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February 13, 2023EBioMedicineOpen Access

ARA-S reversed the E4031-prolonged action potential duration and QT interval in ex-vivo guinea pig hearts.

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Why the study?

LQTS patients display a spectrum of phenotypes with often unknown causes, prompting investigation into whether the endocannabinoid system modulates the cardiac KV7.1/KCNE1 channel.

Population

Ex-vivo guinea pig hearts and molecular models of KV7.1/KCNE1 channels

Comparison

Endocannabinoid exposure vs baseline or control conditions

Design

Preclinical laboratory study using two-electrode voltage clamp, molecular dynamics simulations, and ex-vivo heart models

Authors

IHIrene Hiniesto‐IñigoLCLaura M. Castro-GonzálezVCValentina Corradi

Discussion

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Overview

Endocannabinoids may modify LQTS phenotype; hypothesis-generating and requires prospective validation before clinical consideration.

Structured PICO

P
Population
Ex-vivo guinea pig hearts (E4031 drug-induced LQT2 model) and molecular models for hKV7.1/KCNE1 channels
I
Intervention
Endocannabinoids (specifically ARA-S)
O
Outcome
Channel activation (voltage-dependence, current amplitude, conductance), action potential duration, and QT intervalsurrogate

Endocannabinoids like ARA-S enhance hKV7.1/KCNE1 channel function and can reverse drug-induced QT prolongation in preclinical models, suggesting a potential therapeutic avenue for Long QT Syndrome.

Cite This Study

Hiniesto‐Iñigo et al. (2023) studied this question.

synapsesocial.com/papers/6a7e29ad9094135e0b3c367ahttps://doi.org/10.1016/j.ebiom.2023.104459
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Rescue of loss‐of‐function long QT syndrome‐associated mutations in K<sub>V</sub>7.1/KCNE1 by the endocannabinoid N‐arachidonoyl‐L‐serine (ARA‐S)2025 · 3 citations
  2. 2The endocannabinoid ARA-S acts as an endogenous rescuing factor of Kv7.1/KCNE1 carrying Long QT syndrome mutations and paves the way for drug development strategies2024
  3. 3A Possible Explanation for the Low Penetrance of Pathogenic KCNE1 Variants in Long QT Syndrome Type 52022 · 2 citations
  4. 4The endocannabinoid ARA-S facilitates the activation of cardiac Kv7.1/KCNE1 channels from different species2024 · 2 citations
  5. 5Modulation of hERG potassium channel gating normalizes action potential duration prolonged by dysfunctional KCNQ1 potassium channel2012 · 58 citations