Pyruvate Metabolism in Lafora Disease

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Abstract
Lafora disease is an autosomal recessive and progressive degenerative disorder of the central nervous system (CNS). The pathogenic mechanism has been presumed to be an inborn error of carbohydrate metabolism, although this has never been proved. In a case of proven Lafora disease, pyruvate metabolism, which has a central position in carbohydrate metabolism, was studied in body fluids under various conditions and in brain biopsy material. No abnormalities in this metabolic pathway were found. This finding plus earlier reports in the literature exclude a defect in glycolysis; thus, a disturbance of carbohydrate metabolism as the pathogenic mechanism of Lafora disease is unlikely.

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