Bringing home the bacon? The next step in cardiac sodium channelopathies

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Abstract

Mutations in SCN5A, which encodes the α subunit of the major cardiac sodium channel Na_V1.5, are associated with multiple cardiac arrhythmias, including Brugada syndrome. It is not clear why mutations in SCN5A result in such a variety of cardiac phenotypes, and introduction of analogous Scn5a mutations into small-animal models has not recapitulated alterations in cardiac physiology associated with human disease. In this issue of the JCI, Park and colleagues present a pig model of cardiac sodium channelopathy that was generated by introducing a human Brugada syndrome–associated SCN5A allele. This large-animal model exhibits many phenotypes seen in patients with SCN5A loss-of-function mutations and has the potential to provide important insight into sodium channelopathies.

Authors

Arthur A.M. Wilde, Pieter G. Postema