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One-step Metabolomics: Carbohydrates, Organic and Amino Acids Quantified in a Single Procedure
Published on: June 25, 2010
Glutaric aciduria type I: outcome following detection by newborn screening
S Bijarnia1, V Wiley, K Carpenter
1Genetic Metabolic Disorders Service, The Children's Hospital at Westmead, Sydney, NSW, Australia.
Journal of Inherited Metabolic Disease
|August 7, 2008
Summary
Early detection of glutaric aciduria type I (GA I) through newborn screening significantly reduces neurological damage. However, even with prompt diagnosis and management, severe complications can still occur in some infants.
Area of Science:
- Biochemistry
- Genetics
- Neurology
Background:
- Glutaric aciduria type I (GA I) is a serious organic acidaemia affecting the brain.
- Tandem mass spectrometry allows for newborn screening of GA I.
- Early intervention may prevent neurological damage.
Purpose of the Study:
- To assess the outcomes of GA I patients in New South Wales over a decade.
- To evaluate the effectiveness of newborn screening and management strategies for GA I.
Main Methods:
- Retrospective analysis of 10 GA I patients (3 clinical, 7 newborn screening).
- Diagnosis confirmed via urinary organic acids, plasma acylcarnitines, clinical/MRI findings, and genetic/enzyme analysis.
- Treatment included carnitine supplementation and specialized diet.
- Disability assessed using Kyllerman scale.
Main Results:
- Birth frequency of GA I was 1:90,000.
- Newborn screening identified 7 patients, 6 of whom remain asymptomatic.
- Clinically diagnosed patients were all symptomatic with varying severity.
- One screened patient experienced severe decompensation and died despite treatment.
Conclusions:
- Early diagnosis of GA I via newborn screening improves outcomes and reduces neurological complications.
- Despite early detection and management, severe complications and mortality remain a risk in some GA I cases.
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