Engineered bacterial voltage-gated sodium channel platform for cardiac gene therapy.

Journal Article (Journal Article)

Therapies for cardiac arrhythmias could greatly benefit from approaches to enhance electrical excitability and action potential conduction in the heart by stably overexpressing mammalian voltage-gated sodium channels. However, the large size of these channels precludes their incorporation into therapeutic viral vectors. Here, we report a platform utilizing small-size, codon-optimized engineered prokaryotic sodium channels (BacNav) driven by muscle-specific promoters that significantly enhance excitability and conduction in rat and human cardiomyocytes in vitro and adult cardiac tissues from multiple species in silico. We also show that the expression of BacNav significantly reduces occurrence of conduction block and reentrant arrhythmias in fibrotic cardiac cultures. Moreover, functional BacNav channels are stably expressed in healthy mouse hearts six weeks following intravenous injection of self-complementary adeno-associated virus (scAAV) without causing any adverse effects on cardiac electrophysiology. The large diversity of prokaryotic sodium channels and experimental-computational platform reported in this study should facilitate the development and evaluation of BacNav-based gene therapies for cardiac conduction disorders.

Full Text

Duke Authors

Cited Authors

  • Nguyen, HX; Wu, T; Needs, D; Zhang, H; Perelli, RM; DeLuca, S; Yang, R; Tian, M; Landstrom, AP; Henriquez, C; Bursac, N

Published Date

  • February 2, 2022

Published In

Volume / Issue

  • 13 / 1

Start / End Page

  • 620 -

PubMed ID

  • 35110560

Pubmed Central ID

  • PMC8810800

Electronic International Standard Serial Number (EISSN)

  • 2041-1723

Digital Object Identifier (DOI)

  • 10.1038/s41467-022-28251-6


  • eng

Conference Location

  • England