Alglucosidase alfa for Pompe Disease: What is it? How does it work? How is it consumed? Is it safe? Side effects? Studies? Research?
Pompe disease, also known as glycogen storage disease type II, is a rare genetic disorder characterized by its name. People with Pompe disease have cells with excess accumulation of glycogen, which leads to progressive muscle weakness and problems with breathing (respiratory issues.) Alglucosidase alfa therapy is a recombinant enzyme replacement therapy, which basically means that it replaces the enzyme that patients are deficient in. This therapy works to replace alpha-glucosidase, the enzyme acid which breaks down excess glycogen.
In people with Pompe disease, symptoms manifest in two ways: loss of muscular strength and inability to breath efficiently. This is because, the deficiency of alpha-glucosidase leads to buildup of the glycogen in lysosomes, which are crucial organelles for muscle cells. However, when alglucosidase alfa therapy is administered and the enzyme is taken up by the patient's body, they receive enough of the enzyme for the cells to take it in using receptors on their cells (specifically called mannose-6-phosphate receptors.)
Alglucosidase alfa therapy is administered mostly on a biweekly basis intravenously (using an IV drip.) The specific dosage depends on the weight of the patient. Usually, a standard formula of 20mg/kg is given every two weeks. They are also continuously monitored to prevent infusion-related reactions like swelling, tenderness, itchiness, etc.
People who shouldn't take this therapy include people who have hypersensitivity to any of the components of the enzyme OR people who have ever experienced severe reactions to IV fluids; but these things are usually ruled out right when your doctor discusses the disease and possible treatment plans with you.
The efficacy of Alglucosidase alfa therapy is very widely accepted, especially due to the numerous studies which support it. For example, this specific study from 2006 in the New England Journal of Medicine titled, "Enzyme replacement therapy for infantile-onset Pompe disease" found that Alglucosidase alfa resulted in significant improvement in cardiac function of patients, motor skills in infants, and even things as large as survival rates.
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