Effect of sodium captopropane sulfonic on expressions of matrix metalloproteinase-9 mRNA and tissue-inhibitor of metalloproteinase-1 mRNA in lungs of paraquat poisoning rats
10.3867/j.issn.1000-3002.2010.01.005
- VernacularTitle:二巯丙磺钠对百草枯急性中毒大鼠肺组织基质金属蛋白酶-9 mRNA及其金属蛋白酶组织抑制剂-1 mRNA表达的影响
- Author:
Guoqiang HAN
;
Qiaomeng QIU
;
Zhongqiu LU
;
Xiaoyan HE
;
Guangliang HONG
;
Fei HE
;
Huan LIANG
- Publication Type:Journal Article
- Keywords:
sodium dimercaptopropane sulfonate;
paraquat;
matrix metalloproteinase-9;
tissue-inhibitor of metalloproteinase-1;
gene expression
- From:
Chinese Journal of Pharmacology and Toxicology
2010;24(1):25-29
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVE To study the changes in matrix metalloproteinase-9 (MMP-9) mRNA, tissue-inhibitor of metalloproteinase-1 (TIMP-1) mRNA and the ratio of MMP-9 mRNA/TIMP-1 mRNA in the lungs of paraquate poisoning rats, and to investigate the protective effects of sodium dimercaptopropane sulfonate (DMPS, Unithiol). METHODS One hundred and twenty male SD rats were divided into 12 groups (n=10) randomly: normal control, DMPS control, PQ poisoning 1, 3, 7, 14 and 28 d model groups, (DMPS+PQ) 1, 3, 7, 14 and 28 d groups. PQ poisoning model was established by intraperitoneal injecting paraquate. The expression of MMP-9 mRNA and TIMP-1 mRNA in lung tissues was detected by RT-PCR. RESULTS ①By observing the changes of action and observing the lung tissues sections, the rats' PQ poisoning models was successfully established. ②The histopathology of lung showed infiltration of inflammatory cell in acute phase(within 2 weeks), the inflammation decreased gradually after 2 weeks, hyperplasia of collagen and pulmonary fibrosis were instead. Howerer, the pathological changes were alleviated obviously in the (DMPS+PQ) groups. ③Compared with the PQ groups, the expression of MMP-9 mRNA and TIMP-1 mRNA in lungs diminished greatly in the DMPS+PQ groups after rats injected DMPS(P<0.05); the ratio of MMP-9/TIMP-1 mRNA was bigger at 7, 14 and 28 d in the DMPS+PQ groups after rats injected DMPS. CONCLUSION Down-regulation of the expression of MMP-9 mRNA and TIMP-1 mRNA and up-regulation ratio of MMP-9 mRNA/TIMP-1 mRNA by DMPS may be one of mechanisms by which pulmonary injury and pulmonary fibrosis are prevented in the acute paraquate poisoning.
