Abstract
Dairy cow neutrophils activate a program leading to cell death and expulsion of neutrophil extracellular traps (NETs). The role of NETs is to capture pathogens, degrade bacterial toxic factors, and kill bacteria, and the effect of trace elements on NETs formation in cows is ambiguous. In this study, we investigated the effect of copper (0.5 mg/L, 0.8 mg/L, and 2.0 mg/L), zinc (0.1 mg/L, 1.0 mg/L, and 2.0 mg/L), and selenium (0.01 mg/L, 0.08 mg/L, and 2.0 mg/L) on NETs formation in dairy cows. Trace element induction of NETs formation was observed by laser confocal microscopy. The percentage of NETs formed was calculated by quantifying the number of neutrophils forming NETs out of the total number of neutrophils observed under 20 high-power (200×) magnification fields. Copper, zinc, and selenium induced the formation of a network of DNA, neutrophil elastase (ELA2), and myeloperoxidase. Copper (0.8 mg/L), zinc (1.0 mg/L), and selenium (0.01 mg/L) significantly induced the formation of NETs (p < 0.05). The study provides an experimental basis for enhancing the immunity of cows before and after delivery by adding copper, zinc, and selenium.
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Abbreviations
- MPO:
-
Myeloperoxidase
- PMN:
-
Polymorphonuclear neutrophils
- NETs:
-
Neutrophil extracellular traps
- ELA2:
-
Neutrophils elastase
- ROS:
-
Reactive oxygen species
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Funding
This work was financially supported by the National Natural Science Foundation of China (31972747, 31772698) and the Natural Science Foundation of Heilongjiang Province (c2018043).
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All procedures used in this study were approved by the Institutional Animal Care and Use Committee of Heilongjiang Bayi Agricultural University.
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Zhou, X., Wang, H., Lian, S. et al. Effect of Copper, Zinc, and Selenium on the Formation of Bovine Neutrophil Extracellular Traps. Biol Trace Elem Res 199, 3312–3318 (2021). https://doi.org/10.1007/s12011-020-02477-1
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DOI: https://doi.org/10.1007/s12011-020-02477-1