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• W4377093952 abstract "Abstract Pompe disease (PD) is a neuromuscular disorder caused by acid α‐glucosidase (GAA) deficiency. Reduced GAA activity leads to pathological glycogen accumulation in cardiac and skeletal muscles responsible for severe heart impairment, respiratory defects, and muscle weakness. Enzyme replacement therapy with recombinant human GAA (rhGAA) is the standard‐of‐care treatment for PD, however, its efficacy is limited due to poor uptake in muscle and the development of an immune response. Multiple clinical trials are ongoing in PD with adeno‐associated virus (AAV) vectors based on liver‐ and muscle‐targeting. Current gene therapy approaches are limited by liver proliferation, poor muscle targeting, and the potential immune response to the hGAA transgene. To generate a treatment tailored to infantile‐onset PD, we took advantage of a novel AAV capsid able to increase skeletal muscle targeting compared to AAV9 while reducing liver overload. When combined with a liver‐muscle tandem promoter (LiMP), and despite the extensive liver‐detargeting, this vector had a limited immune response to the hGAA transgene. This combination of capsid and promoter with improved muscle expression and specificity allowed for glycogen clearance in cardiac and skeletal muscles of Gaa −/− adult mice. In neonate Gaa −/− , complete rescue of glycogen content and muscle strength was observed 6 months after AAV vector injection. Our work highlights the importance of residual liver expression to control the immune response toward a potentially immunogenic transgene expressed in muscle. In conclusion, the demonstration of the efficacy of a muscle‐specific AAV capsid‐promoter combination for the full rescue of PD manifestation in both neonate and adult Gaa −/− provides a potential therapeutic avenue for the infantile‐onset form of this devastating disease." @default.
• W4377093952 created "2023-05-20" @default.
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• W4377093952 date "2023-05-29" @default.
• W4377093952 modified "2023-09-26" @default.
• W4377093952 title "Muscle‐specific, liver‐detargeted <scp>adeno‐associated virus</scp> gene therapy rescues Pompe phenotype in adult and neonate <scp><i>Gaa</i>^−/−</scp> mice" @default.
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• W4377093952 doi "https://doi.org/10.1002/jimd.12625" @default.
• W4377093952 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/37204237" @default.
• W4377093952 hasPublicationYear "2023" @default.
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