Doxycycline inhibits paraquat-induced pulmonary fibrosis via TGF-β1/Smad pathway
10.3760/cma.j.issn.1001-9391.2019.05.004
- VernacularTitle: 多西环素通过TGF-β1/Smad通路抑制百草枯诱导的肺纤维化研究
- Author:
Yanru ZHOU
1
;
Chang PANG
2
;
Silu CHEN
1
;
Xiaofang TANG
1
Author Information
1. Shenyang Medical College, Shenyang 110002, China
2. The Sencond Affiliated Hospital of Shenyang Medical College, Shenyang 110001, China
- Publication Type:Journal Article
- Keywords:
Doxycycline;
Paraquat;
Pulmonary fibrosis;
Mechanism study
- From:
Chinese Journal of Industrial Hygiene and Occupational Diseases
2019;37(5):337-341
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To investigate the possible mechanism of doxycycline inhibiting paraquat-induced pulmonary fibrosis and provide a theoretical basis for its clinical application.
Methods:Human lung fibroblast HFL1 cells were selected as the research object in the cell group. Divided into blank group, paraquat group, paraquat+doxycycline group. The expression of TGF-β1, a-SMA, Smad3 and Smad2 protein was detected by ELISA using 40 ml of paraquat 40 umol/L and 3 mg/L of oleic acid 10 mg/L. In the animal group, 120 healthy and clean SD rats were randomly divided into three groups: blank group, paraquat group, paraquat+doxycycline group. The expression of TGF-β1, a-SMA, Smad3 and Smad2 protein in lung tissue of mice at 1 day, 3 days, 7 days, 14 days and 21 days was detected by Elisa method. The expression of TGF-β1, a-SMA, Smad3 and Smad2 protein in lung tissue of 21-day mice was detected by Western Blotting. The pathological changes of lung tissue were observed by HE staining for 1 day, 3 days, 7 days, 14 days and 21 days.
Results:In the cell group experiment, the expression of TGF-β1, a-SMA, Smad3 and Smad2 protein increased gradually with paraquat in the paraquat group, and the expression of TGF-β1, a-SMA, Smad3 and Smad2 protein was significantly higher than that in the blank group. The difference was statistically significant (P<0.05) . The expressions of TGF-β1, a-SMA, Smad3 and Smad2 in the paraquat+doxycycline group were significantly lower than those in the paraquat group, but still higher than the blank group, the difference was statistically significant (P<0.05) .
Conclusion:Doxycycline inhibits paraquat-induced pulmonary fibrosis by inhibiting the expression of TGF-β1, a-SMA and Smad3, Smad2 proteins.
