Selenium Attenuates Staphylococcus aureus Mastitis in Mice by Inhibiting the Activation of the NALP3 Inflammasome and NF-κB/MAPK Pathway
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Mastitis is one of the most important diseases affecting the dairy industry in the world, and it also poses a great threat to human food safety. In this study, we explored whether selenium can inhibit the activation of the NALP3 inflammasome and NF-κB/MAPK pathway to achieve anti-inflammatory effects. Sixty BALB/c female mice were randomly divided into three groups according to diets of different selenium concentrations (high, normal, and low). After 90 days, mice fed the same selenium concentration were randomly divided into two smaller groups, one of which was inoculated with Staphylococcus aureus and the other injected with saline as a control. Through histopathologic examination staining, western blot, qPCR, and ELISA, the results showed that with increasing selenium concentrations, the expression levels of IL-1β, TNF-α, NALP3, caspase-1, and ASC were decreased in mouse mammary tissue. Therefore, this study revealed that selenium can attenuate S. aureus mastitis by inhibiting the activation of the NALP3 inflammasome and NF-κB/MAPK pathway.
KeywordsSelenium Mastitis S. aureus NALP3 inflammasome Inflammation
This work was supported by the National Natural Science Foundation of China (NO.31502130), the Da Bei Nong Group Promoted Project for Young Scholar of HZAU (Grant No. 2017DBN002 the Fundamental Research Funds for the Center Universities (Program NO.2017BC005), and the National Natural Science Foundation of Hubei province (NO. 2016CFB435),
Compliance with Ethical Standards
All experimental procedures were conducted with the approval of the Institutional Animal Care and Use Committee of Huazhong Agricultural University (20170819).
Conflict of Interest
The authors declare that they have no conflict of interest.
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