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Organic acids in urine from human newborns
Clinical Chemistry
|January 1, 1976
Summary
Newborn infant urine contains high levels of specific organic acids like succinic acid, differing significantly from adult urine profiles. These findings highlight developmental changes in metabolic pathways and organic acid excretion during early life.
Area of Science:
- Biochemistry
- Metabolomics
- Pediatrics
Background:
- Understanding the metabolic profile of newborns is crucial for assessing health and development.
- Organic acids in urine serve as biomarkers for various metabolic processes and physiological states.
Purpose of the Study:
- To investigate and characterize the distinct urinary organic acid profile of normal newborn infants.
- To compare the organic acid composition in newborns with that of adults.
Main Methods:
- Urine samples from 15 healthy newborn infants were analyzed.
- Gas chromatography/mass spectrometry (GC/MS) was employed after derivatization with trimethylsilyl groups.
Main Results:
- Newborn urine showed significantly higher concentrations of succinic, fumaric, 2-ketoglutaric, and 3-hydroxy-3-methylglutaric acids compared to adults.
- Hippuric acid was found in lower amounts in newborns than in adults.
- Several previously unidentified aliphatic dicarboxylic acids were detected in newborn urine.
Conclusions:
- The urinary organic acid profile of newborns differs substantially from that of adults, indicating developmental variations in metabolic pathways.
- These differences may reflect unique metabolic adaptations or immature enzymatic functions in early life.
- Further research into these specific organic acids could provide insights into neonatal metabolic health.