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- W2024695712 endingPage "H445" @default.
- W2024695712 startingPage "H431" @default.
- W2024695712 abstract "The voltage-gated Na channel isoform 1.5 (Na V 1.5) is the pore forming α-subunit of the voltage-gated cardiac Na channel, which is responsible for the initiation and propagation of cardiac action potentials. Mutations in the SCN5A gene encoding Na V 1.5 have been linked to changes in the Na current leading to a variety of arrhythmogenic phenotypes, and alterations in the Na V 1.5 expression level, Na current density, and/or gating have been observed in acquired cardiac disorders, including heart failure. The precise mechanisms underlying these abnormalities have not been fully elucidated. However, several recent studies have made it clear that Na V 1.5 forms a macromolecular complex with a number of proteins that modulate its expression levels, localization, and gating and is the target of extensive post-translational modifications, which may also influence all these properties. We review here the molecular aspects of cardiac Na channel regulation and their functional consequences. In particular, we focus on the molecular and functional aspects of Na channel phosphorylation by the Ca/calmodulin-dependent protein kinase II, which is hyperactive in heart failure and has been causally linked to cardiac arrhythmia. Understanding the mechanisms of altered Na V 1.5 expression and function is crucial for gaining insight into arrhythmogenesis and developing novel therapeutic strategies." @default.
- W2024695712 created "2016-06-24" @default.
- W2024695712 creator A5001770484 @default.
- W2024695712 creator A5020824899 @default.
- W2024695712 creator A5041109959 @default.
- W2024695712 date "2013-08-15" @default.
- W2024695712 modified "2023-10-05" @default.
- W2024695712 title "Post-translational modifications of the cardiac Na channel: contribution of CaMKII-dependent phosphorylation to acquired arrhythmias" @default.
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