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Updated: Jul 7, 2026
09:28
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Published on: June 25, 2010
Maternal glutaric acidemia, type I identified by newborn screening
Eric A Crombez1, Stephen D Cederbaum, Elaine Spector
1Department of Pediatrics, University of California, Los Angeles, CA 90095-1752, USA.
Molecular Genetics and Metabolism
|February 29, 2008
Summary
Low carnitine levels in newborns unexpectedly revealed glutaric acidemia type I in two mothers. Diagnosis in mothers was confirmed by organic acid analysis, despite normal acylcarnitine profiles.
Area of Science:
- Biochemistry
- Genetics
- Metabolic Disorders
Background:
- Glutaric acidemia type I (GA-I) is an inherited metabolic disorder.
- Early diagnosis and intervention are crucial for managing GA-I.
- Carnitine deficiency can be a marker in certain metabolic disorders.
Observation:
- Two mothers were diagnosed with GA-I after their newborns presented with low carnitine levels.
- Both mothers exhibited low plasma carnitine levels.
- Organic acid analysis in mothers revealed typical GA-I metabolites, despite normal plasma acylcarnitine profiles.
Findings:
- The study identified two cases of unsuspected maternal glutaric acidemia type I.
- Genetic analysis revealed one mother as a compound heterozygote and the other with a mutation in Exon 6 of the glutaric acid dehydrogenase gene.
- The diagnostic challenge highlights the importance of considering maternal metabolic status.
Implications:
- Low newborn carnitine levels can be an indicator of maternal metabolic disorders like GA-I.
- This suggests a need for broader metabolic screening in mothers of affected infants.
- Understanding the genetic basis of GA-I is essential for accurate diagnosis and genetic counseling.
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