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New developments in the treatment of hyperammonemia: emerging use of carglumic acid

DOI: http://dx.doi.org/10.2147/IJGM.S10490

Keywords: hyperammonemia, N-carbamylglutamate, carglumic acid, urea cycle disorder, metabolic disorders

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evelopments in the treatment of hyperammonemia: emerging use of carglumic acid Review (6880) Total Article Views Authors: Marta Daniotti, Giancarlo la Marca, Patrizio Fiorini, et al Published Date January 2011 Volume 2011:4 Pages 21 - 28 DOI: http://dx.doi.org/10.2147/IJGM.S10490 Marta Daniotti1, Giancarlo la Marca2, Patrizio Fiorini1, Luca Filippi1 1Neonatal Intensive Care Unit, Department of Perinatal Medicine, “A. Meyer” University Children’s Hospital, Florence, Italy; 2Mass Spectrometry, Clinical Chemistry and Pharmacology Laboratory, Neuroscience Department, “A. Meyer” University Children’s Hospital, Florence, Italy Abstract: Hyperammonemia is a true neonatal emergency with high toxicity for the central nervous system and developmental delay. The causes of neonatal hyperammonemia are genetic defects of urea cycle enzymes, organic acidemias, lysinuric protein intolerance, hyperammonemia–hyperornithinemia–homocitrullinemia syndrome, transient hyperammonemia of the newborn, and congenital hyperinsulinism with hyperammonemia. In some of these conditions the high blood ammonia levels are due to the reduction of N-acetylglutamate, an essential cofactor necessary for the function of the urea cycle, or to the reduction of carbamoyl-phosphate synthase-I activity. In these cases, N-carbamylglutamate (carglumic acid) can be administered together with the conventional therapy. Carglumic acid is an analog of N-acetylglutamate that has a direct action on carbamoyl-phosphate synthase-I. Its effects are reactivation of the urea cycle and reduction of plasma ammonia levels. As a consequence it improves the traditional treatment, avoiding the need of hemodialysis and peritoneal dialysis. In this review we evaluate the possible field of application of carglumic acid and its effectiveness and safety.

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