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Aberrant epithelial remodeling with impairment of cilia architecture in non-cystic fibrosis bronchiectasis.

Abstract：

Background:Aberrant epithelial remodeling and/or abnormalities in mucociliary apparatus in airway epithelium contribute to infection and inflammation. It is uncertain if these changes occur in both large and small airways in non-cystic fibrosis bronchiectasis (non-CF bronchiectasis). In this study, we aim to investigate the histopathology and inflammatory profile in the epithelium of bronchi and bronchioles in bronchiectasis. Methods:Excised lung tissue sections from 52 patients with non-CF bronchiectasis were stained with specific cellular markers and analyzed by immunohistochemistry and immunofluorescence to assess the epithelial structures, including ciliated cells and goblet cells morphology. Inflammatory cell counts and ciliary proteins expression levels of centrosomal protein 110 (CP110) and dynein heavy chain 5, axonemal (DNAH5) were assessed. Results:Epithelial hyperplasia is found in both bronchi and bronchioles in all specimens, including hyperplasia and/or hypertrophy of goblet cells. The median cilia length is longer in hyperplastic epithelium [bronchi: 8.16 (7.03-9.14) µm, P<0.0001; bronchioles: 7.46 (6.41-8.48) µm, P<0.0001] as compared to non-hyperplastic epithelium (bronchi: 5.60 µm; bronchioles: 4.89 µm). Hyperplastic epithelium is associated with overexpression of CP110 and decreased intensity of DNAH5 expression in both bronchial and bronchiolar epithelium. Though infiltration of neutrophils is predominant (63.0% in bronchi and 76.7% in bronchioles), eosinophilic infiltration is also present in the mucosa of bronchi (30.8%) and bronchioles (54.8%). Conclusions:Aberrant epithelial remodeling with impaired mucociliary architecture is present in both large and small airways in patients with refractory non-CF bronchiectasis. Future studies should evaluate the interplay between these individual components in driving chronic inflammation and lung damage in patients.

journal_name

J Thorac Dis

journal_title

Journal of thoracic disease

authors

Chen ZG,Li YY,Wang ZN,Li M,Lim HF,Zhou YQ,Cai LM,Li YT,Yang LF,Zhang TT,Wang DY

doi

10.21037/jtd.2018.02.13

subject

Has Abstract

pub_date

2018-03-01 00:00:00

pages

1753-1764

issue

3

eissn

2072-1439

issn

2077-6624

pii

jtd-10-03-1753

journal_volume

10

pub_type

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