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Related Experiment Videos

B-cell isotype control in atopy and asthma assessed with cDNA array technology.

M H Brutsche1, I C Brutsche, P Wood

  • 1Pulmonology, University Hospital of Basel, Petersgraben 4, CH-4031 Basel, Switzerland. mbrutsche@uhbs.ch

American Journal of Physiology. Lung Cellular and Molecular Physiology
|March 10, 2001
PubMed
Summary

This study investigated gene expression in atopic asthma. Key IgE-related genes showed altered expression, revealing activated inflammatory pathways in atopic individuals.

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Area of Science:

  • Immunology
  • Molecular Biology

Background:

  • B-cell isotype switching and immunoglobulin E (IgE) production are complex processes regulated by multiple gene products.
  • Understanding these regulatory mechanisms is crucial for identifying disease markers and potential therapeutic targets in allergic conditions.

Purpose of the Study:

  • To investigate human B-cell isotype control and IgE production in atopy and asthma using cDNA array technology.
  • To identify differentially expressed genes associated with atopy and asthma.

Main Methods:

  • Peripheral blood mononuclear cells were isolated from 18 atopic asthmatic, 8 atopic nonasthmatic, and 14 healthy control subjects.
  • Messenger RNA (mRNA) was purified, reverse-transcribed, and hybridized to cDNA membranes for gene expression analysis.
  • Group differences in gene expression were assessed using the Mann-Whitney U-test.

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Main Results:

  • Significant alterations in the expression of 23 out of 78 tested IgE-related genes were observed in atopic and asthmatic individuals compared to healthy controls.
  • Differentially expressed genes encompassed surface molecules, cytokines, intracellular signaling molecules, and transcription factors involved in T- and B-cell interactions.
  • Both atopic nonasthmatic and atopic asthmatic subjects exhibited activated proinflammatory pathways and a pro-IgE cytokine environment.

Conclusions:

  • Atopy and asthma are associated with significant changes in IgE-related gene expression.
  • Activated proinflammatory pathways and a pro-IgE cytokine milieu are characteristic of atopic individuals, including those with asthma.
  • These findings highlight potential molecular targets for managing allergic diseases.