Enzyme replacement therapy in severe adult-onset glycogen storage disease type II |
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Authors: | Sabrina Ravaglia Cesare Danesino Anna Pichiecchio Alessandra Repetto Guy Umberto Poloni Miriam Rossi Pietro Fratino Arrigo Moglia Alfredo Costa |
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Institution: | Institute of Neurology IRCCS "C. Mondino", University of Pavia, Pavia, Italy, sabrina.ravaglia@mondino.it. |
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Abstract: | Glycogen storage disease type II (GSDII) is an autosomal recessive myopathy caused by a deficiency of the lysosomal enzyme acid alpha-glucosidase (GAA). Enzyme replacement therapy (ERT) with recombinant GAA (rh-GAA) has become available for GSDII, although its effectiveness in adults remains unknown. We present a case of ERT with rhGAA in a 49-year-old male with GSDII in a severe stage of the disease. Quantitative magnetic resonance imaging showed an increase in muscle mass of the inferior limb, especially evident on the quadriceps femoris and the patient's body weight increased up to 30%, although his reported dietary habits were the same as before ERT. Beyond improvement in muscle strength and respiratory function, we observed a dramatic increase in body mass index from 12.7 to 16.6 kg/m(2). This may reflect a change from a catabolic state to a more balanced metabolic state during ERT. |
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Keywords: | enzyme replacement therapy glycogen storage disease type II quantitative muscle MRI recombinant GAA |
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