Enzyme Replacement Therapy Can Reverse Pathogenic Cascade in Pompe Disease

Molecular Therapy. Methods & Clinical Development
Naresh K MeenaRosa Puertollano

Abstract

Pompe disease, a deficiency of glycogen-degrading lysosomal acid alpha-glucosidase (GAA), is a disabling multisystemic illness that invariably affects skeletal muscle in all patients. The patients still carry a heavy burden of the disease, despite the currently available enzyme replacement therapy. We have previously shown that progressive entrapment of glycogen in the lysosome in muscle sets in motion a whole series of "extra-lysosomal" events including defective autophagy and disruption of a variety of signaling pathways. Here, we report that metabolic abnormalities and energy deficit also contribute to the complexity of the pathogenic cascade. A decrease in the metabolites of the glycolytic pathway and a shift to lipids as the energy source are observed in the diseased muscle. We now demonstrate in a pre-clinical study that a recently developed replacement enzyme (recombinant human GAA; AT-GAA; Amicus Therapeutics) with much improved lysosome-targeting properties reversed or significantly improved all aspects of the disease pathogenesis, an outcome not observed with the current standard of care. The therapy was initiated in GAA-deficient mice with fully developed muscle pathology but without obvious clinical symptoms; this p...Continue Reading

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Citations

Sep 24, 2020·Biomolecules·Naresh K Meena, Nina Raben
Dec 21, 2020·EBioMedicine·Rachel MyerowitzNina Raben
Apr 4, 2021·International Journal of Molecular Sciences·Manuela MoriggiCecilia Gelfi
Oct 5, 2021·EMBO Molecular Medicine·Antonietta TaralloGiancarlo Parenti

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Methods Mentioned

BETA
biopsies
Confocal microscopy
ELISA
electrophoresis
biopsy
Assay

Software Mentioned

GraphPad Prism
SUnSET )
Zeiss Efficient Navigation ( ZEN )

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