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A. Tessier

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Open access Sep 2026

Selective activation of tetrodotoxin-sensitive sodium channels by AaH-II drives arrhythmogenic late Na+ current in the heart

Abstract Increased late sodium current (INaL) is a central mechanism underlying both inherited and acquired cardiac arrhythmias. Although Nav1.5 is the dominant cardiac sodium channel, multiple tetrodotoxin-sensitive (TTX-S) Nav isoforms are also expressed in cardiomyocytes, particularly within transverse tubules, wher...

Hugo Millet, M. Choteau-Bodor, T. Stervinou et al. · 0 citations
Open access Oct 2026

Nav1.5 regulates intrinsic cardiac neuronal excitability and expands the cellular basis of SCN5A channelopathies

Background Loss- and gain-of-function variants in SCN5A, encoding the cardiac sodium channel Nav1.5, are major causes of inherited cardiac channelopathies. Their pathophysiology has almost exclusively been attributed to altered cardiomyocyte excitability and cardiac conduction. However, growing evidence indicates that...

A. Jean, H. Rabeony, C. Magaud et al. · 0 citations

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