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Rapid pulmonary fibrosis induced by acute lung injury via a lipopolysaccharide three-hit regimen.

Identifieur interne : 002A42 ( Main/Exploration ); précédent : 002A41; suivant : 002A43

Rapid pulmonary fibrosis induced by acute lung injury via a lipopolysaccharide three-hit regimen.

Auteurs : Hui Li [République populaire de Chine] ; Shaohui Du ; Lina Yang ; Yangyan Chen ; Wei Huang ; Rong Zhang ; Yinghai Cui ; Jun Yang ; Dongfeng Chen ; Yiwei Li ; Saixia Zhang ; Jianhong Zhou ; Zhijun Wei ; Zhibin Yao

Source :

RBID : pubmed:19474208

Descripteurs français

English descriptors

Abstract

Based on the common characteristic of severe acute respiratory syndrome (SARS) and highly pathogenic avian influenza and the mechanism of inflammation and fibrosis, it is speculated that there should exist a fundamental pathological rule that severe acute lung injury (ALI)-induced rapid pulmonary fibrosis is caused by various etiological factors, such as SARS coronavirus, H5N1-virus, or other unknown factors, and also by lipopolysaccharide (LPS), the most common etiological factor. The investigation employed intratracheally, and intraperitoneally and intratracheally applied LPS three-hit regimen, compared with bleomycin-induced chronic pulmonary fibrosis. Inflammatory damage and fibrosis were evaluated, and the molecular mechanism was analyzed according to Th1/Th2 balance, Sma- and MAD-related proteins (Smads) and signal transducer and activator of transcriptions (STATs) expression. The results suggested that rapid pulmonary fibrosis could be induced by ALI via LPS three-hits. The period from 3-7 days in the LPS group was the first rapid pulmonary fibrosis stage, whereas the second fast fibrosis stage occurred on days 14-21. Th2 cell polarization, Smad4 and Smad7 should be the crucial molecular mechanism of ALI-induced rapid fibrosis. The investigation was not only performed to establish a new rapid pulmonary fibrosis model, but also to provide the elicitation for mechanism of ALI changed into the rapid pulmonary fibrosis.

DOI: 10.1177/1753425908101509
PubMed: 19474208


Affiliations:


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<term>Acute Lung Injury (immunology)</term>
<term>Acute Lung Injury (pathology)</term>
<term>Animals</term>
<term>Anti-Inflammatory Agents (pharmacology)</term>
<term>Antibiotics, Antineoplastic (pharmacology)</term>
<term>Bleomycin (toxicity)</term>
<term>Bronchoalveolar Lavage Fluid (immunology)</term>
<term>Cytokines (blood)</term>
<term>Cytokines (drug effects)</term>
<term>Cytokines (metabolism)</term>
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<term>Bléomycine (toxicité)</term>
<term>Cytokines ()</term>
<term>Cytokines (métabolisme)</term>
<term>Cytokines (sang)</term>
<term>Dexaméthasone (pharmacologie)</term>
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<front>
<div type="abstract" xml:lang="en">Based on the common characteristic of severe acute respiratory syndrome (SARS) and highly pathogenic avian influenza and the mechanism of inflammation and fibrosis, it is speculated that there should exist a fundamental pathological rule that severe acute lung injury (ALI)-induced rapid pulmonary fibrosis is caused by various etiological factors, such as SARS coronavirus, H5N1-virus, or other unknown factors, and also by lipopolysaccharide (LPS), the most common etiological factor. The investigation employed intratracheally, and intraperitoneally and intratracheally applied LPS three-hit regimen, compared with bleomycin-induced chronic pulmonary fibrosis. Inflammatory damage and fibrosis were evaluated, and the molecular mechanism was analyzed according to Th1/Th2 balance, Sma- and MAD-related proteins (Smads) and signal transducer and activator of transcriptions (STATs) expression. The results suggested that rapid pulmonary fibrosis could be induced by ALI via LPS three-hits. The period from 3-7 days in the LPS group was the first rapid pulmonary fibrosis stage, whereas the second fast fibrosis stage occurred on days 14-21. Th2 cell polarization, Smad4 and Smad7 should be the crucial molecular mechanism of ALI-induced rapid fibrosis. The investigation was not only performed to establish a new rapid pulmonary fibrosis model, but also to provide the elicitation for mechanism of ALI changed into the rapid pulmonary fibrosis.</div>
</front>
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