Vitamin C-treated murine bone marrow-derived dendritic cells preferentially drive naïve T cells into Th1 cells by increased IL-12 secretions

Vitamin C has been reported to shift immune responses toward Th1. In this study, we evaluated whether this effect was by way of dendritic cells. Murine dendritic cells (DCs) were prepared from bone marrow precursors. DCs treated with vitamin C secreted an increased amount of IL-12p70 after activatio...

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Bibliographic Details
Published in:Cellular immunology 2011, Vol.266 (2), p.192-199
Main Authors: Jeong, Young-Joo, Hong, Seung-Woo, Kim, Jin-Hee, Jin, Dong-Hoon, Kang, Jae Seung, Lee, Wang Jae, Hwang, Young-il
Format: Article
Language:English
Subjects:
Animals
Ascorbic Acid - pharmacology
Cells, Cultured
Dendritic cell
Dendritic Cells - drug effects
Dendritic Cells - immunology
ERK1/2
IL-12p70
Interferon-gamma - immunology
Interleukin-12 - metabolism
Interleukin-5 - immunology
Lipopolysaccharides - immunology
Lymphocyte Activation - drug effects
Lymphocyte Activation - immunology
Male
Mice
Mice, Inbred BALB C
Mice, Inbred C57BL
Mitogen-Activated Protein Kinases - antagonists & inhibitors
Mitogen-Activated Protein Kinases - immunology
p38
Reactive Oxygen Species - analysis
Sodium-dependent vitamin C transporter
T-Lymphocytes - drug effects
T-Lymphocytes - immunology
Th1 Cells - immunology
Th1-shifting
Vitamin C
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Summary:Vitamin C has been reported to shift immune responses toward Th1. In this study, we evaluated whether this effect was by way of dendritic cells. Murine dendritic cells (DCs) were prepared from bone marrow precursors. DCs treated with vitamin C secreted an increased amount of IL-12p70 after activation with LPS. These cells rendered naïve T cells to secrete more Th1 cytokine, IFN-γ, and less Th2-cytokine, IL-5 in the culture supernatants. Vitamin C-treatment also increased phosphorylation of p38 and ERK1/2 in DCs. p38 inhibitor in culture media suppressed the effect of vitamin C to elevate IL-12p70 secretion. In contrast, ERK inhibitor elevated IL-12p70 secretion. In summary, vitamin C taken up into DCs increased IL-12p70 secretion of these cells by modulating the activation of signal molecules, and thus shifted immune responses toward Th1. These data provide us a new insight on the role of vitamin C in modulating immune responses.
ISSN:0008-8749
1090-2163
DOI:10.1016/j.cellimm.2010.10.005