期刊
TOXICOLOGY AND APPLIED PHARMACOLOGY
卷 377, 期 -, 页码 -出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.taap.2019.114616
关键词
PM2.5; NF-kappa B; miRNAs; Cell Cycle; Proliferation
资金
- Natural Science Foundations of China [81473011, 81773479, 21777100, 81803267]
- Natural Science Foundation of Jiangsu Province [BK20161585]
- Luzhou Government [2017LZXNYD-J24]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (2018)
- Southwest Medical University [2017LZXNYD-J24]
Air pollution, especially fine particulate matter (PM2.5, particles < 2.5 mu m in size), induces adverse health effects on the respiratory system. Uncontrolled proliferation of bronchial epithelial cells, resulting from deregulated cell cycle progression, contributes to pulmonary homeostatic imbalance. Although dysregulation of miRNAs is involved in a variety of pathophysiologic processes, the role of miRNAs in lung injury caused by PM2.5 is unclear. In the present study, we found that different concentrations of PM2.5 caused a biphasic effect on proliferation of human bronchial epithelial (HBE) cells. PM2.5 induced an aberrant cell cycle and proliferation of HBE cells, and up-regulated miR-155 levels with a concentration-dependent manner. High miR-155 expression, mediated by NF-kappa B activation, produced an accelerated G1/S phase and cell proliferation though the STAT3 pathway, which targeted SOCS1. These findings indicate that NF-kappa B-mediated miR-155 induces an altered cell cycle through epigenetic modulation of the SOCS1/STAT3 signaling pathway and provide a mechanism for the biphasic effect of different concentrations of PM2.5 in inducing respiratory injury.
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