LplA-mediated rescue of lethal myopathy and cardiomyopathy in mitochondrial lipoylation-deficient mammalian caused by Lipt1

AAV-delivered bacterial LplA plus lipoic acid rescues premature lethality and reverses hypertrophic cardiomyopathy in muscle-specific Lipt1-deficient mice.

• Why it matters: Mitochondrial lipoylation defects can be lethal, yet there is no effective treatment, and an in vivo preclinical model is needed to test rescue strategies.
• What they did: The authors created a viable mouse model with muscle-specific Lipt1 deficiency, then delivered AAV-LplA with lipoic acid to bypass the endogenous lipoylation pathway.
• The result: LplA reconstitutes mitochondrial protein lipoylation and oxidative phosphorylation in situ, suppressing PI3K-Akt hyperactivation and restoring autophagic clearance, improving motor function and cardiac pathology.

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