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23 September 2008 Correction of glycogenosis type 2 by muscle-specific lentiviral vector
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Abstract

Glycogen storage disease type II (GSDII) or Pompe disease is an inherited disease of glycogen metabolism caused by a lack of functional lysosomal acid α-glucosidase (GAA). Affected individuals store glycogen in lysosomes resulting in fatal hypertrophic cardiomyopathy and respiratory failure in the most severe form. We investigated for the first time the use of lentiviral vectors to correct the GSDII phenotype in human and murine GAA-deficient cells. Fibroblasts from infantile and adult GSDII patients were efficiently transduced by a GAA-expressing lentiviral vector placed under the control of the strong MND promoter, leading to a complete restoration of enzymatic activity. We also developed a muscle-specific lentiviral vector based on the synthetic C5–12 promoter and tested it on deficient myogenic satellite cells derived from a GSDII mouse model. GAA was expressed as a correctly processed protein allowing a complete enzymatic and metabolic correction in myoblasts and differentiated myo-tubes, as well as a significant mannose-6-phosphate (M6P)-dependent secretion reuptake by naive cells. Transduced cells showed lysosomal glycogen clearance, as demonstrated by electron microscopy. These results form the basis for a therapeutic approach of GSDII using lentiviral vector-mediated gene transfer into muscle stem cells.

Emmanuel Richard, Gaëlle Douillard-Guilloux, Lionel Batista, and Catherine Caillaud "Correction of glycogenosis type 2 by muscle-specific lentiviral vector," In Vitro Cellular & Developmental Biology - Animal 44(10), 397-406, (23 September 2008). https://doi.org/10.1007/s11626-008-9138-5
Received: 29 May 2008; Accepted: 18 July 2008; Published: 23 September 2008
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