Abstract
Selenium, in the form of selenoproteins, plays a pivotal role in anti-inflammatory processes and antioxidant defense system. The aim of this study was to examine the effects of selenium on lipopolysaccharide (LPS)-induced inflammatory responses in bovine mammary epithelial cells (bMEC) and to investigate the potential mechanism. bMEC viability was measured by MTT assay. TNF-α, IL-1β, cyclooxygenase-2 (COX-2), and inducible nitric oxide synthase (iNOS) messenger RNA (mRNA) expressions were evaluated by quantitative real-time polymerase chain reaction (qRT-PCR). The activation of nuclear factor-kappa B (NF-κB) was determined by Western blotting. The results showed that the mRNA expressions of these inflammatory factors were significantly inhibited by selenium in a dose-dependent manner. At protein levels, Western blot analysis demonstrated that selenium dose-dependently decreased NF-κB p65 translocating from the cytoplasm to the nucleus. Taken together, these results suggest that the anti-inflammatory property of selenium in LPS-stimulated primary bMEC may be attributed to the downregulation of NF-κB activation.
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This study was supported by China Postdoctoral Science Foundation (2013 M540255).
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Zhengkai Wei and Minjun Yao contributed equally to this work.
The authors hereby retract the article entitled “Inhibition of Lipopolysaccharide (LPS)-Induced Inflammatory Responses by Selenium in Bovine Mammary Epithelial Cells in Primary Culture” (Wei et al. 2014) published in Inflammation, Volume 38 / Issue 1 (February 2015) because of inappropriate statistical analysis and inability to reproduce some of the results.
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Wei, Z., Yao, M., Li, Y. et al. RETRACTED ARTICLE: Inhibition of Lipopolysaccharide (LPS)-Induced Inflammatory Responses by Selenium in Bovine Mammary Epithelial Cells in Primary Culture. Inflammation 38, 152–158 (2015). https://doi.org/10.1007/s10753-014-0017-9
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DOI: https://doi.org/10.1007/s10753-014-0017-9