Arthavan Selvanathan, Kalliope Demetriou, Matthew Lynch, Michelle Lipke, Carolyn Bursle, Aoife Elliott, Anita Inwood, Leanne Foyn, Brett McWhinney, David Coman, Jim McGill
N-acetylglutamate synthase (NAGS) deficiency is a rare autosomal recessive disorder, which results in the inability to activate the key urea cycle enzyme, carbamoylphosphate synthetase 1 (CPS1). Patients often suffer life-threatening episodes of hyperammonaemia, both in the neonatal period and also at subsequent times of catabolic stress. Because NAGS generates the cofactor for CPS1, these two disorders are difficult to distinguish biochemically. However, there have now been numerous case reports of 3-methylglutaconic aciduria (3-MGA), a marker seen in mitochondrial disorders, occurring in CPS1 deficiency...
September 2022: JIMD Reports