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Liver transplantation for citrullinaemia improves intellectual function.
J M Fletcher1, R Couper, D Moore
1Department of Chemical Pathology, Women's and Children's Hospital, North Adelaide, Australia. jmfletch@medicine.adelaide.edu.au
Journal of Inherited Metabolic Disease
|July 10, 1999
Summary
Liver transplantation significantly improved cognitive function and well-being in a boy with citrullinaemia, a rare urea cycle disorder. Early liver transplant is recommended for children with citrullinaemia to prevent brain damage.
Area of Science:
- Biochemistry
- Genetics
- Pediatric Medicine
Background:
- Citrullinaemia, caused by argininosuccinic acid synthetase (ASA) deficiency, leads to neonatal hyperammonaemic coma and poor intellectual outcomes.
- Despite medical management, patients often experience severe neurological deficits.
Purpose of the Study:
- To evaluate the impact of liver transplantation on a patient with citrullinaemia.
- To assess neurocognitive and overall well-being improvements post-transplantation.
Main Methods:
- A 12-year-old boy with citrullinaemia underwent two cadaveric liver transplants due to uncontrolled hyperammonaemia and hepatic failure.
- Comprehensive psychometric assessments were conducted before and after transplantation.
Main Results:
- Liver transplantation normalized plasma ammonium levels, leading to significant improvements in mental functioning and quality of life.
- Psychometric testing revealed enhanced perceptual organization and visuospatial abilities post-transplant, though not fully normalized.
- Family reported reduced stress due to fewer hyperammonaemic crises and hospitalizations.
Conclusions:
- Liver transplantation should be considered an early therapeutic strategy for children with citrullinaemia.
- Early intervention can prevent further cerebral damage associated with chronic hyperammonaemia.