Abstract
Propionic acidaemia (PA) results from propionyl-CoA carboxylase deficiency. During metabolic decompensation, the accumulation of propionyl-CoA causes secondary hyperammonaemia through N-acetylglutamate synthetase inactivation. Carglumic acid, a structural analogue of N-acetylglutamate, was given to patients with PA (n=3) during episodes of metabolic decompensation (n=8; age range: birth to 4years), in addition to high energy/low protein intake and carnitine. Plasma ammonia concentrations normalised within 6–19h. Carglumic acid was well tolerated with no side effects noted.
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