Abstract
Selenium (Se), an antioxidant agent, provides significant protection from reactive oxygen species (ROS)-induced cell damage in vivo and in vitro. However, it is unclear whether Se can protect against zearalenone (ZEN)-induced apoptosis in chicken spleen lymphocyte. In this study, we investigated the underlying mechanism of the apoptosis induced by ZEN in chicken spleen lymphocyte and further evaluated the protective mechanism of Se on ZEN-induced apoptosis. The results show that ZEN induced an increase in ROS generation and lipid peroxidation, and a decrease in levels of superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GSH-Px), and glutathione (GSH). The results of apoptosis morphologically from acridine orange/ethidium bromide (AO/EB) fluorescent staining and flow cytometry analysis show apparent apoptosis in the ZEN-treated group, and was confirmed by the upregulation of caspase-3, -12 and downregulation of Bcl-2. Meanwhile, ZEN activated the endoplasmic reticulum (ER) stress by upregulating ER stress-related molecular sensors (GRP78, ATF6, ATF4, IRE). However, co-treatment with Se effectively blocked ROS generation, improved antioxdative capacity, and reversed apoptosis and ER stress-related genes and protein expression. Taken together, these data suggest that oxidative stress and ER stress play a vital role in ZEN-induced apoptosis, and Se had a significant preventive effect on ZEN-induced apoptosis in chicken spleen lymphocyte via ameliorating the ER stress signaling pathway.
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Abbreviations
- ZEN:
-
Zearalenone
- ROS:
-
Reactive oxygen species
- ER:
-
Endoplasmic reticulum
- IRE:
-
Inositol requiring enzyme
- PERK:
-
Protein kinase RNA (PKR)-like ER kinase
- ATF 6:
-
Activating transcription factor 6
- GRP78:
-
Glucose-regulated protein 78
- ATF4:
-
Activating transcription factor 4
- Se:
-
Selenium
- SOD:
-
Superoxide dismutase
- GSH-Px:
-
Glutathione peroxidase
- GSH:
-
Glutathione
- MDA:
-
Malondialdehyde
- CAT:
-
Catalase
- AO/EB:
-
Acridine orange/Ethidium bromide
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This work received financial support from the National Key Research and Development Program of China (No. 2017YFD0502200).
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Xiao, Y., Xu, S., Zhao, S. et al. Protective effects of selenium against zearalenone-induced apoptosis in chicken spleen lymphocyte via an endoplasmic reticulum stress signaling pathway. Cell Stress and Chaperones 24, 77–89 (2019). https://doi.org/10.1007/s12192-018-0943-9
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DOI: https://doi.org/10.1007/s12192-018-0943-9