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Simultaneous macroamylasemia and macrolipasemia

Z Zaman1, A Van Orshoven, G Mariën

  • 1Department of Clinical Chemistry, University Hospitals Leuven, Belgium.

Clinical Chemistry
|June 1, 1994
PubMed
Summary
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This study reports the first simultaneous occurrence of macroamylasemia and macrolipasemia in a patient with celiac disease. These macroenzymes, formed by IgA binding to amylase and lipase, exceeded 300 kDa.

Area of Science:

  • Biochemistry
  • Clinical Chemistry
  • Immunology

Background:

  • Celiac disease is an autoimmune disorder triggered by gluten ingestion.
  • Macroamylasemia and macrolipasemia are rare conditions involving enzyme-macromolecule complexes.
  • Simultaneous occurrence of both macroenzymes is exceptionally uncommon.

Observation:

  • A patient with diagnosed gluten enteropathy presented with both macroamylasemia and macrolipasemia.
  • Immunoglobulin A (IgA) was identified as the binding protein for both amylase and lipase.
  • Gel filtration chromatography indicated molecular masses exceeding 300 kDa for both complexes.

Findings:

  • The study describes the first documented case of co-existing macroamylasemia and macrolipasemia.
  • Both macroenzymes were characterized as complexes of polyclonal IgA with native amylase and lipase.

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  • The molecular weight of these IgA-macroenzyme complexes was determined to be greater than 300 kDa.

    • Implications:

    • This case highlights the potential for complex enzyme abnormalities in celiac disease.
    • Understanding IgA-mediated macroenzyme formation may offer new diagnostic or prognostic insights.
    • Further research is warranted to explore the prevalence and clinical significance of such macroenzyme associations.