Neutrophil elastase ameliorates matrix metalloproteinase-9 to promote lipopolysaccharide-induced acute lung injury in mice 1
Acta cir. bras
;
31(6): 382-388, graf
Article
in English
| LILACS
| ID: lil-785018
ABSTRACT
ABSTRACT PURPOSE:
To investigate the regulatory roles of neutrophil elastase (NE) and matrix metalloproteinase-9 (MMP-9) in lipopolysaccharide (LPS)-induced acute lung injury (ALI) in mice.METHODS:
To construct LPS-induced ALI mouse models, wild-type C57BL/6 mice were administered 5.0 mg/kg of LPS through endotracheal, and/or 1.0 mg/kg of ONO-5046, and/or 20.0 mg/kg of chemically modified tetracycline-3 (CMT-3) by gavage. The levels of MMP-9, tissue inhibitor of metalloprotease-1, interleukin (IL)-6 were detected by real time RT-PCR at 6 h, 24 h and 48 h, and tumor necrosis factor (TNF), lung wet-dry weight ratio, white blood cell (WBC) count and polymorphonuclear (PMN) count in bronchoalveolar lavage fluid (BALF) were tested at 48 h after administration. The 5-day survival analysis of the ALI mice was also performed.RESULTS:
Both ONO-5046 and CMT-3, regardless of being used individually or combined, significantly reduced the levels of MMP-9, IL-6, and TNF in lung tissue as well as in BALF, and the WBC and PMN count in BALF. Combined treatment with ONO-5046 and CMT-3 remarkably improved the survival rate of ALI mice.CONCLUSION:
Neutrophil elastase synergizes with matrix metalloproteinase-9 to promote and regulate the release of inflammatory mediators and the infiltration of inflammatory cells, consequently affecting the survival of lipopolysaccharide-induced acute lung injury mice.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Sulfonamides
/
Tetracyclines
/
Leukocyte Elastase
/
Matrix Metalloproteinase 9
/
Acute Lung Injury
/
Glycine
Type of study:
Prognostic study
Limits:
Animals
Language:
English
Journal:
Acta cir. bras
Journal subject:
General Surgery
/
Procedimentos Cir£rgicos Operat¢rios
Year:
2016
Type:
Article
Affiliation country:
China
Institution/Affiliation country:
General Hospital of PLA/CN
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