Vitamin D Regulates Immune Responses in Cattle
Author Information
Author(s): Nelson Corwin D., Nonnecke Brian J., Reinhardt Timothy A., Waters W. Ray, Beitz Donald C., Lippolis John D.
Primary Institution: National Animal Disease Center, Agricultural Research Service, United States Department of Agriculture
Hypothesis
Activated monocytes and B cells synthesize 1,25(OH)2D3, which down-regulates antigen-specific expression of IFN-γ and IL-17F in T cells in a paracrine fashion.
Conclusion
The study found that vitamin D regulates immune responses by enhancing certain immune functions while suppressing others, particularly in T cells.
Supporting Evidence
- Vitamin D enhances the expression of immune-related genes in monocytes and B cells.
- 1,25(OH)2D3 produced in monocytes and B cells acts to regulate immune responses.
- Treatment with 25(OH)D3 suppressed IFN-γ and IL-17F production in T cells.
Takeaway
Vitamin D helps our immune system work better by making some immune cells stronger and telling other cells to calm down.
Methodology
The study used peripheral blood mononuclear cells from calves, which were stimulated with Mycobacterium bovis PPD and treated with vitamin D metabolites to assess immune responses.
Potential Biases
Potential bias may arise from the specific animal model used, which may not fully represent human immune responses.
Limitations
The study was conducted on a small sample size of calves, which may limit the generalizability of the findings to other populations.
Participant Demographics
Twelve male Holstein calves aged approximately 5 to 12 months.
Statistical Information
P-Value
p<0.001
Statistical Significance
p<0.001
Digital Object Identifier (DOI)
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