期刊
TOXICOLOGY AND APPLIED PHARMACOLOGY
卷 418, 期 -, 页码 -出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.taap.2021.115500
关键词
CuSO4; Lung; TGF-beta 1; MAPKs; EMT; Mouse
资金
- program for Changjiang Scholars
- University Innovative Research Team [IRT 0848]
- Shuangzhi project of Sichuan Agricultural University [03573050, 1921993267]
- Sichuan Science and Technology Program [2020YJ0113]
Copper is an essential trace element for living organisms, but over-exposure can lead to adverse health effects. Research found that copper sulfate treatment induced pulmonary fibrosis in mice, activating multiple signaling pathways and causing epithelial-mesenchymal transition. This study reveals the mechanism of copper-induced pulmonary toxicity through EMT induced by TGF-beta 1/Smad and MAPKs pathways.
Copper (Cu) is considered as an essential trace element for living organisms. However, over-exposure to Cu can lead to adverse health effects on human and animals. There are limited researches on pulmonary toxicity induced by Cu. Here, we found that copper sulfate (CuSO4)-treatment could induce pulmonary fibrosis with Masson staining and up-regulated protein and mRNA expression of Collagen I and alpha-Smooth Muscle Actin (alpha-SMA) in mice. Next, the mechanism underlying Cu-induced pulmonary fibrosis was explored, including transforming growth factor-beta 1 (TGF-beta 1)-mediated Smad pathway, mitogen-activated protein kinases (MAPKs) pathway and epithelial-mesenchymal transition (EMT). CuSO4 triggered pulmonary fibrosis by activation of the TGF-beta 1/Smad pathway, which was accomplished by increasing TGF-beta 1, p-Smad2 and p-Smad3 protein and mRNA expression levels. Also, up-regulated protein and mRNA expression of p-JNK, p-ERK, and p-p38 demonstrated that CuSO4 activated MAPKs pathways. Concurrently, EMT was activated by increasing vimentin and N-cadherin while decreasing E-cadherin protein and mRNA expression levels. Altogether, the abovementioned findings indicate that CuSO4 treatment may induce pulmonary fibrosis through the activation of EMT induced by TGF-beta 1/Smad pathway and MAPKs pathways, revealing the mechanism Cu-caused pulmonary toxicity.
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