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Developmental changes of aldehyde oxidase activity in young Japanese children

Y Tayama1, K Miyake, K Sugihara

  • 1Graduate School of Biomedical Sciences, Faculty of Pharmaceutical Science, Hiroshima University, Hiroshima, Japan.

Clinical Pharmacology and Therapeutics
|March 22, 2007
PubMed

Insights

Aldehyde oxidase (AO) activity increases rapidly in children up to one year old. This developmental change is crucial for drug metabolism and may necessitate individualized pediatric dosing adjustments.

Area of Science:

  • Pharmacology
  • Biochemistry
  • Pediatrics

Background:

  • Aldehyde oxidase (AO) is vital for drug metabolism, influencing drug efficacy and toxicity.
  • Individual variations in AO activity can impact patient response and necessitate dose adjustments.
  • Understanding developmental changes in AO activity is critical for pediatric drug therapy.

Purpose of the Study:

  • To investigate the developmental trajectory of aldehyde oxidase (AO) activity in children.
  • To correlate AO activity with various pediatric growth parameters.
  • To inform potential therapeutic drug monitoring and dose adjustments in pediatric populations.

Main Methods:

  • Assessed AO activity using the pyridone formation ratio from N(1)-methylnicotinamide in urine samples from 101 children.
  • Correlated AO activity with age, body weight, body surface area, and liver volume.
  • Analyzed developmental trends of AO activity from birth to approximately one year of age.

Main Results:

  • Significant correlations were observed between AO activity and pediatric growth indices.
  • Age demonstrated a moderate correlation with AO activity (r(2)=0.506).
  • AO activity showed a rapid increase with age, particularly up to one year of life.

Conclusions:

  • Aldehyde oxidase (AO) activity begins increasing shortly after birth in children.
  • Immature AO activity in infants under one year necessitates careful consideration for drug dosing.
  • Individualized AO activity assessment may be beneficial for optimizing drug dosages in young children to prevent toxicity.

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