Biomaterial Database

Ornithine transcarbamylase deficiency. 1997

S J Yeh, and W L Hou, and W S Tsai, and T J Wu, and M Tuchman, and T R Wang

Department of Pediatrics, National Taiwan University Hospital, Taipei, ROC.

Two infants, one male and one female, with elevated serum ammonia levels, were shown, based on urine organic acid analysis and DNA studies, to have ornithine transcarbamylase (OTC) deficiency. OTC deficiency is one of the most common urea cycle disorders. Hyperammonemia occurred at 3 days of age in the male infant, and at approximately 7 days of age in the female infant. Administration of sodium benzoate and sodium phenylacetate lowered the serum ammonia level effectively in both cases. Other modalities, including peritoneal dialysis and protein restriction, were also important in the control of the serum ammonia level. The mother of the male infant was shown to be a carrier of the OTC gene mutation by allopurinol loading test. The mutation site of the OTC gene for the female infant was identified, but her mother did not have the mutation. OTC deficiency, an incompletely dominant X-linked disorder, is a severe disease even for females and prompt treatment and precise genetic counseling are mandatory.

UI	MeSH Term	Description	Entries
D007231	Infant, Newborn	An infant during the first 28 days after birth.	Neonate,Newborns,Infants, Newborn,Neonates,Newborn,Newborn Infant,Newborn Infants
D008297	Male		Males
D009954	Ornithine Carbamoyltransferase	A urea cycle enzyme that catalyzes the formation of orthophosphate and L-citrulline (CITRULLINE) from CARBAMOYL PHOSPHATE and L-ornithine (ORNITHINE). Deficiency of this enzyme may be transmitted as an X-linked trait. EC 2.1.3.3.	Ornithine Transcarbamylase,Ornithine Carbamylphosphate Transferase,Carbamoyltransferase, Ornithine,Carbamylphosphate Transferase, Ornithine,Transcarbamylase, Ornithine,Transferase, Ornithine Carbamylphosphate
D005260	Female		Females
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D020163	Ornithine Carbamoyltransferase Deficiency Disease	An inherited urea cycle disorder associated with deficiency of the enzyme ORNITHINE CARBAMOYLTRANSFERASE, transmitted as an X-linked trait and featuring elevations of amino acids and ammonia in the serum. Clinical features, which are more prominent in males, include seizures, behavioral alterations, episodic vomiting, lethargy, and coma. (Menkes, Textbook of Child Neurology, 5th ed, pp49-50)	OTC Deficiency,Ornithine Transcarbamylase Deficiency,Ornithine Transcarbamylase Deficiency Disease,Deficiency Disease, Ornithine Carbamoyltransferase,Deficiency Disease, Ornithine Transcarbamylase,Ornithine Carbamoyltransferase Deficiency,Ornithine Transcarbamylase Deficiency, Hyperammonemia Due To,Deficiencies, OTC,Deficiencies, Ornithine Transcarbamylase,Deficiency, OTC,Deficiency, Ornithine Transcarbamylase,OTC Deficiencies,Ornithine Transcarbamylase Deficiencies