Research Article | OPEN ACCESS
Effect of Escherichia coli and Staphylococcus aureus on the In vitro Response of Peripheral Blood Mononuclear Cells Isolated from Holstein Dairy Cows had Ketosis or Milk Fever of Field Cases
1H. Ohtsuka, 1N. Kanikawa, 2K. Kudo, 2F. Kyutoku, 3S. Kakinuma, 4M. Kohno, 1Y. Maeda and 1T. Tanabe
1School of Veterinary Medicine, Kitasato University, Towada, Aomori 034-8628, Japan
2Ishikari Agricultural Mutual Relief Association, Ebetsu, Hokkaido 067-0055, Japan
3Kakinuma Veterinary Hospital, 200-1 Kodama, Kodama-Chou, Honjou, Saitama 367-0212, Japan
4Miyagi Prefectural Federated Agricultural Mutual Aid Association, Shiroishi, Miyagi, 989-0731, Japan
International Journal Animal and Veterinary Advances 2014 4:116-121
Received: May 01, 2013 | Accepted: May 31, 2013 | Published: August 20, 2014
Abstract
The expression of cytokines mRNA, including Interleukin (IL)-2, IL-4 and Interferon (IFN)-γ and lymphocyte proliferation stimulated in vitro with either Escherichia coli (E. coli) or Staphylococcus aureus (S.A.) by Peripheral Blood Mononuclear Cells (PBMC) obtained from Holstein dairy cows were examined after the onset of ketosis or milk fever of field cases during the lactation period. The cows were used 50 to 150 days after calving in this study and divided into three groups; seventeen cows with milk fever (MF Group, 94.9±8.6 days after calving), ten cows with ketosis (Ketosis Group, 96.3±10.2 days after calving) and twenty-seven cows with no clinical diseases (Control Group, 89.4±5.4 days after calving). PBMC were stimulated in vitro by soluble antigen of E. coli or S.A. together with recombinant IL-2. The numbers of the peripheral blood T cells and monocyte were lower in the Ketosis Group in comparison with those in the Control Group and a significant difference was found in the number of $CD3^+TcR1-N12^+T$ cells. There was a significantly lower lymphocyte proliferation stimulated with E. coli and S.A. in the Ketosis Group compared to that in the Control Group. Expression of IL-2, IL-4 and IFN-γ mRNA in PBMC stimulated with S.A. in the Ketosis Group was significantly lower than that in the Control Group, but these cytokine expression showed no group differences when PBMC were stimulated with E. coli. The present study demonstrated the onset of ketosis during the lactation period decreases reactivity of PBMC at least when they were stimulated with S.A in vitro.
Keywords:
Cytokine, dairy cows, immune function, ketosis, milk fever,
Competing interests
The authors have no competing interests.
Open Access Policy
This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Copyright
The authors have no competing interests.
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ISSN (Online): 2041-2908
ISSN (Print): 2041-2894 |
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