Why the study?
Myocardial infarction-related arrhythmias are an essential risk factor in sudden cardiac death, and aberrant cardiac Nav1.5 channels are important in their development through complex mechanisms.
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Design
Review
Understanding the complex molecular and genetic regulatory mechanisms of the Nav1.5 sodium channel is crucial for developing targeted therapies for post-myocardial infarction arrhythmias.
Myocardial infarction (MI)-related arrhythmias are an essential risk factor in sudden cardiac death. Aberrant cardiac the cardiac voltage-gated sodium channel (Nav1.5) is important in the development of ventricular arrhythmias after an MI. These mechanisms are profoundly complex and involve sodium voltage-gated channel α subunit 5 (SCN5A) and sodium voltage-gated channel α subunit 10 (SCN10A) single nucleotide polymorphisms, aberrant splicing of SCN5A mRNAs, transcriptional and post-transcriptional regulation, translation, post-translational transport, and modification, along with protein degradation. These mechanisms ultimately promote a decrease in peak sodium currents, an increase in late sodium currents, and changes in sodium channel kinetics. This review aimed to explore the specific mechanisms of Nav1.5 in post-MI arrhythmias and summarize the potential of therapeutic drugs. An in-depth study of the effect of Nav1.5 on arrhythmias after myocardial ischemia is of crucial clinical significance.
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Liu et al. (2025) studied this question.
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