Bleomycin-induced Pulmonary Fibrosis in the Rat: Inhibition by Indomethacin

Overview

Journal Am J Pathol

Publisher Elsevier

Specialty Pathology

Date 1979 Apr 1

PMID 86304

Citations 66

Authors

R S Thrall

J R McCormick

R M Jack

R A McReynolds

P A Ward

Affiliations

Soon will be listed here.

Abstract

A model for pulmonary fibrosis in the rat has been developed using intratracheal administration of bleomycin. The histopathologic features of the reaction are similar to those reported in the hamster model. Increases in vascular permeability are seen in the lung within 24 hours and persist over a 2-month period. Extractable collagen, as measured by hydroxyproline, increases during this time by a factor greater than 1.5 times the reference control values of normal lung. During this same period, a prominent eosinophilia develops. The continued treatment of bleomycin-injected rats with indomethacin markedly diminishes the amount of extractable lung collagen at 60 days and the histopathologic evidence of pulmonary fibrosis. The eosinophilia over the first 3 weeks is also markedly suppressed. Less dramatic effects were seen with the permeability changes. These findings indicate that the rat is a reliable and useful model for the study of blemoycin-induced pulmonary fibrosis and that treatment with indomethacin ameliorates the lung changes.

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