Hydrogen Sulfide Protects against Chemical Hypoxia-Induced Injury via Attenuation of ROS-Mediated Ca 2+ Overload and Mitochondrial Dysfunction in Human Bronchial Epithelial Cells

Oxidative stress induced by hypoxia/ischemia resulted in the excessive reactive oxygen species (ROS) and the relative inadequate antioxidants. As the initial barrier to environmental pollutants and allergic stimuli, airway epithelial cell is vulnerable to oxidative stress. In recent years, the antio...

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Bibliographic Details
Published in:BioMed research international 2018-09, Vol.2018, p.2070971-9
Main Authors: Liu, Cai-Xia, Tan, Yu-Rong, Xiang, Yang, Liu, Chi, Liu, Xiao-Ai, Qin, Xiao-Qun
Format: Article
Language:English
Subjects:
Bronchi - metabolism
Bronchi - pathology
Calcium - metabolism
Cell Hypoxia - drug effects
Cell Line, Transformed
Epithelial Cells - metabolism
Epithelial Cells - pathology
Humans
Hydrogen Sulfide - pharmacology
Membrane Potential, Mitochondrial - drug effects
Mitochondria - metabolism
Mitochondria - pathology
Reactive Oxygen Species - metabolism
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Summary:Oxidative stress induced by hypoxia/ischemia resulted in the excessive reactive oxygen species (ROS) and the relative inadequate antioxidants. As the initial barrier to environmental pollutants and allergic stimuli, airway epithelial cell is vulnerable to oxidative stress. In recent years, the antioxidant effect of hydrogen sulfide (H S) has attracted much attention. Therefore, in this study, we explored the impact of H S on CoCl -induced cell injury in 16HBE14o- cells. The effect of CoCl on the cell viability was detected by Cell Counting Kit (CCK-8) and the level of ROS in 16HBE14o- cells in response to varying doses (100-1000 mol/L) of CoCl (a common chemical mimic of hypoxia) was measured by using fluorescent probe DCFH-DA. It was shown that, in 16HBE14o- cells, CoCl acutely increased the ROS content in a dose-dependent manner, and the increased ROS was inhibited by the NaHS (as a donor of H S). Moreover, the calcium ion fluorescence probe Fura-2/AM and fluorescence dye Rh123 were used to investigate the intracellular calcium concentration ([Ca ] ) and mitochondria membrane potential (MMP) in 16HBE14o- cells, respectively. In addition, we examined apoptosis of 16HBE14o- cells with Hoechst 33342. The results showed that the CoCl effectively elevated the Ca influx, declined the MMP, and aggravated apoptosis, which were abrogated by NaHS. These results demonstrate that H S could attenuate CoCl -induced hypoxia injury via reducing ROS to perform an agonistic role for the Ca influx and MMP dissipation.
ISSN:2314-6133
2314-6141
DOI:10.1155/2018/2070971