Prostaglandin H synthase 2 expression in airway cells from patients with asthma and chronic obstructive pulmonary disease.

Abstract:

:Products of the prostaglandin H synthase (PGHS) metabolic pathway are thought to play a role in the pathogenesis of asthma. We determined the level of expression of the constitutive (PGHS-1) and inducible (PGHS-2) isoforms of the enzyme in induced sputum and bronchial biopsies of patients with asthma, patients with chronic obstructive pulmonary disease (COPD), and unaffected control subjects by immunocyto- and immunohistochemistry. Immunoreactivity for PGHS-2 was significantly greater in the induced sputum of patients with asthma and patients with COPD compared with unaffected control subjects. The level of PGHS-2 was greater in asthma than in COPD. Immunoreactivity for PGHS-1 increased in cells in the induced sputum of patients with asthma and patients with COPD compared with that of unaffected control subjects. Immunostained cells included macrophages, eosinophils, and neutrophils. Greater PGHS-2 immunoreactivity was seen in the submucosal inflammatory infiltrate and in the airway epithelium of patients with asthma compared with unaffected control subjects. In summary, we demonstrate an induction of PGHS-2 in asthma, suggesting increased formation of prostanoids, which may contribute to the inflammatory process.

authors

Taha R,Olivenstein R,Utsumi T,Ernst P,Barnes PJ,Rodger IW,Giaid A

doi

10.1164/ajrccm.161.2.9811063

keywords:

subject

Has Abstract

pub_date

2000-02-01 00:00:00

pages

636-40

issue

2 Pt 1

eissn

1073-449X

issn

1535-4970

journal_volume

161

pub_type

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