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flag Gene therapy restoring connexin-43 improved heart function and survival in mice with a rare, deadly heart condition.

flag A UC San Diego-led study shows gene therapy restoring connexin-43 improves heart function and survival in mice with arrhythmogenic cardiomyopathy (ACM), a rare genetic heart condition linked to sudden cardiac death in young athletes. flag The treatment, delivered via viral vector, enhanced electrical signaling, reduced arrhythmias, and repaired heart structure, even in advanced cases. flag Researchers found connexin-43 may also influence gene activity in the cell nucleus, suggesting broader therapeutic potential. flag While human trials are not yet planned, the approach could one day treat multiple ACM types regardless of specific genetic mutation. flag The findings were published January 26, 2026.

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