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Ahomocysteinemia in molybdenum cofactor deficiency
W D Graf1, O E Oleinik, R M Jack
1Department of Pediatrics, University of Washington School of Medicine, Seattle, USA.
Neurology
|September 25, 1998
Summary
Molybdenum cofactor deficiency (MCD) in an infant presented uniquely with neurological issues and basal ganglia changes. Biochemistry revealed specific metabolic alterations, suggesting sulfite
Area of Science:
- Biochemistry
- Neurology
- Metabolic Disorders
Background:
- Molybdenum cofactor deficiency (MCD) is a rare genetic disorder.
- It affects various metabolic pathways, leading to severe health consequences.
Observation:
- An infant presented with hemiplegia, hypotonia, dystonia, and bilateral basal ganglia abnormalities.
- Biochemical analysis showed absent serum homocysteine, low plasma cystine, and elevated urinary S-sulfocysteine and sulfite.
Findings:
- High levels of oxypurines in serum and urine were detected.
- Sulfite may deplete cysteine and cystine, potentially affecting other thiol-dependent proteins.
- Ahomocysteinemia might be a key factor in MCD's cytotoxicity.
Implications:
- This case highlights a unique clinical presentation of MCD.
- Understanding sulfite's role in thiol depletion could offer new therapeutic targets.
- Ahomocysteinemia may serve as a diagnostic clue for MCD.