Latent cytomegalovirus infection exacerbates experimental pulmonary fibrosis by activating TGF-β1.

Abstract:

:The aim of the present study was to investigate the hypotheses that cytomegalovirus (CMV) may trigger idiopathic pulmonary fibrosis (IPF) in a susceptible host and/or that the presence of CMV may alter IPF in response to a well-defined trigger of pulmonary fibrosis. A mouse model of murine CMV (MCMV) infection was established, and the mice were divided into a control group, bleomycin group and an MCMV+bleomycin group. Changes in the weights of the mice were determined in the three groups. Pulmonary fibrosis was detected using a histopathological method. The activity of transforming growth factor (TGF)‑β1 was measured, and the levels of E‑cadherin, Vimentin and phosphorylated (phospho)‑small mothers against decapentaplegic (SMAD)2 were determined using western blot analysis. MCMV was found to invade the lungs, however, it did not cause pulmonary fibrosis. The progression of fibrosis in the mice treated with MCMV+bleomycin was more rapid, compared with that in the control mice. The protein levels of Vimentin and phospho-SMAD2 were upregulated, whereas the level of E‑cadherin was downregulated in the MCMV+bleomycin group,. The results suggested that latent MCMV infection aggravated pulmonary fibrosis in the mouse model, possibly through the activation of TGF-β1.

journal_name

Mol Med Rep

authors

Li Y,Gao J,Wang G,Fei G

doi

10.3892/mmr.2016.5366

subject

Has Abstract

pub_date

2016-08-01 00:00:00

pages

1297-301

issue

2

eissn

1791-2997

issn

1791-3004

journal_volume

14

pub_type

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