The invention relates to methods for gene therapy in a subject suffering from Pompe disease, comprising gene-editing of a glucosidase, acid, alpha gene (GAA) in said subject. The invention further relates to a cell culture of genetically changed, differentiated myogenic progenitor cells derived from a donor subject suffering from Pompe disease, to a vector for use in a method for gene-editing a eukaryotie cell, and to a myotube prepared from myogenic progenitor cells that have been genetically changed by gene-editing.
