Abstract
Selenium (Se) is an essential trace element, but excessive intake of Se could induce Se poisoning, and result in various health problems. NF-κB regulated many molecules of the immune response and the inflammatory response, and Th1/Th2 balance played a key in the regulation of immune response. The aim of this study is to investigate the role of NF-κB pathway and Th1/Th2 imbalance in the adverse influence of Se poisoning on chicken spleens. In the current study, 90 chickens were randomly divided into two groups (n = 45 per group). The chickens were maintained either on a basal diet (the control group) containing 0.2 mg/kg Se or a high supplemented diet (the Se group) containing 15 mg/kg Se for 45 days. Then, we observed the pathohistology of spleen cells and detected NO content, iNOS activity, and the expression of NF-κB, iNOS, COX-2, PTGE, IL-6, TNF-α, Foxp3, IL-4, and IFN-γ in chicken spleens. In chicken spleens of the Se group, the result showed typical characteristics of inflammation: the content of NO and the activity of iNOS were increased, and the expression of NF-κB, iNOS, COX-2, PTGE, IL-6, TNF-α, and IL-4 was enhanced and that of Foxp3 and IFN-γ was decreased. Our study showed that Se toxicity could promote inflammation via NF-κB pathway, impairing the immune function, and changing Th1/Th2 balance in the chicken spleens.
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The authors thank the Elsevier English Language Editing System to correct grammatical, spelling, and other common errors.
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The present work was financially supported by Southwest University of Science and Technology (15zx7121) and National Defense Basic Research Project (16zg6101).
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Yachao Wang, Li Jiang and Jian He should be considered as co-first authors
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Wang, Y., Jiang, L., He, J. et al. The Adverse Effects of Se Toxicity on Inflammatory and Immune Responses in Chicken Spleens. Biol Trace Elem Res 185, 170–176 (2018). https://doi.org/10.1007/s12011-017-1224-7
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DOI: https://doi.org/10.1007/s12011-017-1224-7