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One-step Metabolomics: Carbohydrates, Organic and Amino Acids Quantified in a Single Procedure
09:28

One-step Metabolomics: Carbohydrates, Organic and Amino Acids Quantified in a Single Procedure

Published on: June 25, 2010

Urinary organic acid excretion by babies born before 33 weeks of gestation

V Walker1, G A Mills

  • 1Clinical Biochemistry, University of Southampton, Southampton General Hospital, U.K.

Clinical Chemistry
|July 1, 1989
PubMed

Insights

This study analyzed urinary organic acids in premature infants to help diagnose metabolic disorders. New methods identified novel metabolites, aiding in understanding infant metabolic health.

Area of Science:

  • Biochemistry
  • Neonatal Medicine
  • Metabolic Disorders

Background:

  • Premature neonates require careful monitoring for metabolic health.
  • Diagnosing inherited organic acid defects is crucial for early intervention.
  • Standard analytical methods are available for metabolic disorder investigations.

Purpose of the Study:

  • To establish a diagnostic basis for inherited organic acid defects in premature neonates.
  • To characterize urinary organic acid profiles in this vulnerable population.
  • To identify novel urinary metabolites in normal neonates.

Main Methods:

  • Analysis of 127 random urine samples from 22 premature infants (25-32 weeks gestation).
  • Sample preparation involved oximation, extraction, and derivatization to trimethylsilyl forms.
  • Gas-liquid chromatography with mass spectrometry (GC-MS) was used for metabolite identification.

Main Results:

  • A wide range of organic acids was detected, with significant individual variability.
  • No significant ketonuria was observed.
  • Three metabolites, 2,3-butanediol, 3-hydroxy-2-butanone (acetoin), and 4-hydroxy-3-methoxyphenyllactic acid, were identified in normal neonate urine for the first time.
  • Increased excretion of 4-hydroxyphenyllactic acid and other phenolic acids was noted during parenteral feeding.

Conclusions:

  • Urinary organic acid profiling is a valuable tool for assessing metabolic status in premature infants.
  • The identified novel metabolites expand the understanding of neonatal metabolism.
  • Variations in metabolite profiles highlight the influence of clinical care and gut microbiome on neonates.

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