ArticleBiotech (Basel (Switzerland))2026
AAV Vector Toolkit for the Delivery and Expression of the Artificial microRNA in the Murine Heart.
Article in Biotech (Basel (Switzerland)), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundAdeno-associated virus (AAV) vector-mediated gene transfer is an emerging treatment strategy for severe cardiac disorders with genetic etiology. We refined the AAV toolkit to achieve efficient and selective expression of the therapeutic transgene in mouse hearts.
methodsUsing vectors with a reporter transgene, we evaluated AAV administration routes, AAV serotype tropism to the myocardium, and cardiospecific promoters.
resultsWe showed that systemic AAV administration provides potent delivery and uniform transduction of cardiac tissue, outperforming localized injection techniques. The MyoAAV 2A capsid variant enabled an improved heart-to-liver transduction ratio compared to the parental AAV9 serotype. Screening a panel of cardiac and pan-muscular promoters in vitro and in vivo verified the superiority of the cardiac troponin T (cTnT) promoter for robust heart-specific transgene expression. Finally, we demonstrated that the cumulative properties of systemic AAV delivery, the MyoAAV 2A serotype, and the cTnT promoter allowed for efficient cardiac synthesis of the therapeutic transgene-an artificial miRNA designed for the gene suppression strategy of FLNC-related cardiomyopathy.
conclusionsOur findings establish an effective AAV approach for transgene transfer into the mouse heart and promote the development of gene therapy for cardiac disorders.
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