GAA enzyme

A new gene therapy for Pompe disease showed promise in a mouse model, researchers say, fully clearing in muscles the buildup of glycogen that characterizes the genetic disorder and also reducing it nearly completely in the brain. Glycogen is the stored form of glucose, or sugar — the body’s…

The investigational gene therapy ACT-101 overall was well-tolerated among three people with late-onset Pompe disease (LOPD) who were treated in a Phase 1/2 clinical trial. Moreover, the trial results also showed that treatment markedly increased levels of the GAA enzyme — deficient in Pompe disease — in the patients’ muscle…

Most children with Pompe disease in a small study developed antibodies against the enzyme replacement therapy Myozyme (alglucosidase alfa) — marketed in the U.S. as Lumizyme — but their presence did not limit treatment efficacy, its researchers reported. Children with the highest levels of antibodies also experienced most of…

The prevalence of late-onset Pompe disease (LOPD) in people across the U.S. and in Montreal, Canada, who lack an official diagnosis but have its characteristic neuromuscular symptoms — including neck and proximal muscle weakness or elevated creatine kinase levels (a marker of muscle damage)…

A better understanding of Pompe disease-causing genetic mutations may help with early treatment intervention, even if symptoms are subtle, a small Hungarian study suggests. Researchers found that the precise localization of a mutation determines the impact on GAA enzyme activity, which in turn has been associated with disease onset.

AVR-RD-03, Avrobio‘s investigational gene therapy for classic infantile-onset Pompe disease, was found to reduce toxic glycogen accumulations to healthy levels in a mouse model of Pompe. These results, presented during an Avrobio Virtual R&D Day…

Transplanting blood stem cells modified to carry the GAA gene raised glycogen levels almost to normal across a range of organs, including the brain, and improved locomotion in a mouse model of Pompe disease, a study reported. These findings suggest that blood stem cell gene therapy, in which a patient’s…

Two novel mutations in the GAA gene were linked with cerebral stroke in two siblings with late-onset Pompe disease (PD), a study from China reports. The study, “GAA compound heterozygous mutations associated with autophagic impairment cause cerebral infarction in Pompe disease,” was published in the journal…

Amicus Therapeutics announced positive preclinical data showing that its investigational gene therapy for Pompe disease is effectively delivered and leads to significant glycogen reduction at key tissues in mice, including the brain and spinal cord.

Gene therapy, using an improved version of a virus as a delivery vehicle, greatly improved muscle and respiratory function in a mouse model of Pompe disease. The study, “Systemic delivery of AAVB1-GAA clears glycogen and prolongs survival in a mouse model of Pompe disease,” was published in…