title: The content of mucin MUC-2, -3 and -4 antigens in the bronchial mucosa membrane of chronic obstructive pulmonary disease patients during acute exacerbation - initial report.
abstract: Changes in mucin production and dyscrinia are common features of inflammation in chronic obstructive pulmonary disease (COPD). Immunohistochemical assessment of MUC-2, MUC-3, MUC-4 expression in the integumentary epithelium, goblet cells, the epithelium of mucous glands and stroma fusiform cells of the bronchial mucosa of COPD patients during an infectious and noninfectious exacerbation was performed.
  
  
  
  30 patients with stage III COPD were enrolled to the study. Patients were divided into 2 groups: group A - 14 patients with non-infectious acute exacerbation of COPD (AECOPD) and group B - 16 patients with infectious AECOPD. Fiberoptic bronchoscopy (FBS) and in vivo bronchial biopsy of bronchial mucosa were implemented to determine the extent and nature of bronchial inflammation. The optical density of specific color in bronchial structures was assessed using immunohistochemical staining to MUC-2, -3 and -4 antigens by means of primary monoclonal antibodies to these proteins, and visualization system Dako EnVision + System, Peroxidase (AEC).
  
  
  
  We detected that in different types of bronchial mucosa epithelial cells, during acute infectious exacerbation, a decrease of antigens MUC-2 and MUC-3 expression of a various degree may occur. This phenomenon in the stroma fusiform cells in AECOPD may be a sign of epithelial-mesenchymal transition, that may play a role in the development of an inflammatory process and progression of fibrosis in COPD.
authors.affiliation: cvetko@ukr.net.
authors.forename: Svetlana
authors.initials: S
authors.lastname: Kovalenko
authors.forename: Andrey
authors.initials: A
authors.lastname: Dorofieiev
mesh_terms: D001980:Bronchi / Q000473:pathology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D055262:Mucin-2 / Q000378:metabolism*; D055263:Mucin-3 / Q000378:metabolism*; D055264:Mucin-4 / Q000378:metabolism*; D029424:Pulmonary Disease, Chronic Obstructive / Q000378:metabolism* / Q000473:pathology* / Q000503:physiopathology; D012129:Respiratory Function Tests; D020545:Respiratory Mucosa / Q000378:metabolism* / Q000473:pathology / Q000503:physiopathology
chemical_list: C524625:MUC2 protein, human; C524658:MUC4 protein, human; D055262:Mucin-2; D055263:Mucin-3; D055264:Mucin-4
keywords: bronchial mucosa; inflammation; mucins