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Epithelial apoptosis and loss in airways of children with asthma

Chunju Zhou1, Genquan Yin, Jinrong Liu

  • 1Department of Pathology, Beijing Children's Hospital Affiliated to Capital Medical University, Beijing, PR China.

The Journal of Asthma : Official Journal of the Association for the Care of Asthma
|April 21, 2011
PubMed

Insights

Childhood asthma is linked to increased bronchial epithelial cell loss and apoptosis. This cell death may explain the observed epithelial loss in young asthma patients.

Area of Science:

  • Pulmonary Medicine
  • Cell Biology
  • Pediatrics

Background:

  • Childhood asthma involves airway inflammation and remodeling.
  • Epithelial cell integrity is crucial for airway health.

Purpose of the Study:

  • To investigate bronchial epithelial cell loss and apoptosis in children with asthma.
  • To correlate these findings with asthma pathology.

Main Methods:

  • Analysis of endobronchial biopsies from asthmatic children, non-asthmatic controls, and postmortem samples.
  • Morphological assessment of epithelial shedding.
  • Immunohistochemical staining for caspase-3 and TUNEL assay for apoptosis.

Main Results:

  • Increased epithelial loss and apoptosis (caspase-3 and TUNEL positive cells) in asthmatic children compared to controls.
  • Thicker basement membranes observed in childhood asthmatics.
  • Submucosal lymphocyte infiltration noted, with absence of eosinophilia in most cases.

Conclusions:

  • Childhood asthma exhibits elevated bronchial epithelial cell apoptosis and loss.
  • Increased apoptosis is a potential mechanism contributing to epithelial loss in pediatric asthma.
Abstract

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