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Related Experiment Videos

Macromolecular absorption and cows' milk allergy.

P Juvonen1, I Jakobsson, T Lindberg

  • 1Department of Paediatrics, University of Lund, Malmö General Hospital, Sweden.

Archives of Disease in Childhood
|March 1, 1991
PubMed
Summary

Children with cow's milk allergy exhibit elevated serum alpha-lactalbumin levels, indicating increased macromolecule absorption. This finding suggests a potential biomarker for diagnosing and managing cow's milk allergy.

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Area of Science:

  • Immunology
  • Gastroenterology
  • Pediatrics

Background:

  • Cow's milk allergy (CMA) is a common condition in infants and children.
  • Assessing macromolecule absorption can provide insights into gastrointestinal permeability in CMA.
  • Human alpha-lactalbumin is a major protein in human milk and can be used to study macromolecule absorption.

Purpose of the Study:

  • To investigate serum concentrations of human alpha-lactalbumin as an indicator of macromolecule absorption in children with and without cow's milk allergy.
  • To correlate serum alpha-lactalbumin levels with clinical symptoms and challenge responses in children with CMA.

Main Methods:

  • Competitive radioimmunoassay was used to measure serum concentrations of human alpha-lactalbumin.
  • Study included a control group fed cow's milk formula and children with diagnosed CMA.
  • Children with CMA were studied before and after dietary interventions and during cow's milk challenges.

Main Results:

  • Children with CMA showed significantly higher serum alpha-lactalbumin concentrations compared to controls.
  • Elevated levels ( > 100 µg/L) were observed in the majority of children with CMA, particularly those experiencing symptoms upon challenge.
  • No correlation was found between serum alpha-lactalbumin and total serum IgE levels in children with CMA.

Conclusions:

  • Elevated serum human alpha-lactalbumin suggests increased intestinal permeability in children with CMA.
  • Serum alpha-lactalbumin may serve as a useful biomarker for diagnosing CMA and assessing its severity.
  • Further research is warranted to explore the diagnostic and prognostic value of serum alpha-lactalbumin in pediatric allergy.

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