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Related Experiment Videos

Inhaled corticosteroids decrease vascularity of the bronchial mucosa in patients with asthma.

M Hoshino1, M Takahashi, Y Takai

  • 1Second Department of Internal Medicine, Toho University School of Medicine, 6-11-1, Omori-nishi, Ota-ku, Tokyo, Japan. hoshino@dn.catv.ne.jp

Clinical and Experimental Allergy : Journal of the British Society for Allergy and Clinical Immunology
|June 26, 2001
PubMed
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Inhaled corticosteroids, like beclomethasone dipropionate (BDP), significantly reduce airway vascularity in asthma patients. This treatment also improves lung function and airway responsiveness, indicating a reversal of airway remodeling.

Area of Science:

  • Pulmonary Medicine
  • Respiratory Research
  • Asthma Pathophysiology

Background:

  • Airway remodeling in asthma is characterized by increased vascularity in the airway mucosa.
  • The effect of inhaled corticosteroids on this vascularity has been understudied.

Purpose of the Study:

  • To investigate the impact of inhaled corticosteroids on airway vascularity in asthmatic patients.
  • To assess changes in bronchial biopsy specimens before and after treatment.

Main Methods:

  • A double-blind, placebo-controlled study involving 28 asthmatic patients over 6 months.
  • Treatment with inhaled beclomethasone dipropionate (BDP) 800 microg/daily or placebo.
  • Computerized image analysis of bronchial biopsies stained for type IV collagen and assessment of collagen III in the subepithelial basement membrane.

Related Experiment Videos

Main Results:

  • Asthmatic patients showed significantly increased airway submucosal vascularity compared to controls.
  • BDP treatment led to significant improvements in FEV1, FEV1%, and airway responsiveness.
  • BDP treatment significantly decreased airway vessel number and vascularity, correlating with reduced collagen III thickness.

Conclusions:

  • Inhaled corticosteroid treatment effectively reduces airway wall vascularity in asthma.
  • This reduction in vascularity is linked to improvements in lung function and airway remodeling markers.