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Bronchial mucosal structure after histamine inhalation

M Söderberg1, R Lundgren, S Hellström

  • 1Department of Lung Medicine, University Hospital, Umeå, Sweden.

Allergy
|January 1, 1993
PubMed
Summary
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Histamine inhalation may slightly affect bronchial mucosal cilia, but does not significantly alter overall structure. Bronchial biopsies are suitable for examination within 24 hours post-histamine testing.

Area of Science:

  • Pulmonology
  • Histamine Research
  • Respiratory Mucosa

Background:

  • Previous studies noted increased inflammatory cells and hyaluronan in bronchoalveolar lavage (BAL) fluid 24 hours after histamine inhalation.
  • Histamine's impact on bronchial mucosal structure requires further investigation.

Purpose of the Study:

  • To investigate the influence of histamine inhalation on bronchial mucosal structure.
  • To determine if histamine inhalation affects the suitability of bronchial biopsies for morphological examination.

Main Methods:

  • Studied 20 subjects undergoing histamine inhalation.
  • Utilized scanning electron microscopy (SEM) for mucosal surface analysis.
  • Employed light and transmission electron microscopy for epithelial and subepithelial morphology.

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Main Results:

  • SEM showed minor alterations and cilia loss in small mucosal areas 24 hours post-histamine.
  • Light and transmission electron microscopy indicated no significant epithelial damage or subepithelial changes.
  • Histamine inhalation did not cause significant structural alterations in the bronchial mucosa.

Conclusions:

  • Histamine inhalation does not significantly alter bronchial mucosal structure.
  • Bronchial biopsies can be collected for routine morphological examination within 24 hours after a histamine test.
  • Researchers should consider potential histamine test influence when using biopsies for studies.