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Pàgina inicial > Articles > Articles publicats > Treatment of infantile-onset Pompe disease in a rat model with muscle-directed AAV gene therapy |
Data: | 2024 |
Descripció: | 17 pàg. |
Resum: | Objective: Pompe disease (PD) is caused by deficiency of the lysosomal enzyme acid α-glucosidase (GAA), leading to progressive glycogen accumulation and severe myopathy with progressive muscle weakness. In the Infantile-Onset PD (IOPD), death generally occurs <1 year of age. There is no cure for IOPD. Mouse models of PD do not completely reproduce human IOPD severity. Our main objective was to generate the first IOPD rat model to assess an innovative muscle-directed adeno-associated viral (AAV) vector-mediated gene therapy. Methods: PD rats were generated by CRISPR/Cas9 technology. The novel highly myotropic bioengineered capsid AAVMYO3 and an optimized muscle-specific promoter in conjunction with a transcriptional cis-regulatory element were used to achieve robust Gaa expression in the entire muscular system. Several metabolic, molecular, histopathological, and functional parameters were measured. Results: PD rats showed early-onset widespread glycogen accumulation, hepato- and cardiomegaly, decreased body and tissue weight, severe impaired muscle function and decreased survival, closely resembling human IOPD. Treatment with AAVMYO3-Gaa vectors resulted in widespread expression of Gaa in muscle throughout the body, normalizing glycogen storage pathology, restoring muscle mass and strength, counteracting cardiomegaly and normalizing survival rate. Conclusions: This gene therapy holds great potential to treat glycogen metabolism alterations in IOPD. Moreover, the AAV-mediated approach may be exploited for other inherited muscle diseases, which also are limited by the inefficient widespread delivery of therapeutic transgenes throughout the muscular system. |
Ajuts: | European Commission 667751 Agencia Estatal de Investigación PID2020-113864RB-100 Agència de Gestió d'Ajuts Universitaris i de Recerca 2021/SGR-01012 Ministerio de Sanidad y Consumo CB07/08/0037 |
Drets: | Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades. |
Llengua: | Anglès |
Document: | Article ; recerca ; Versió publicada |
Matèria: | AAV ; Gene therapy ; Glycogen metabolism ; Myopathies ; Pompe disease ; Rat model ; Genetic Therapy/methods ; Humans ; Rats ; Muscle, Skeletal/metabolism ; Animals ; Glycogen Storage Disease Type II/genetics ; Mice ; Cardiomegaly/metabolism ; Glycogen/metabolism ; SDG 3 - Good Health and Well-being |
Publicat a: | Molecular metabolism, Vol. 81 (2024) , p. 101899, ISSN 2212-8778 |
17 p, 6.5 MB |