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Yam storage protein dioscorins modulate cytokine gene expression in BALB/c and C57BL/6 lymphocytes

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This study aimed to evaluate the effects of dioscorins isolated from 2 yam species, Dioscorea alata (Da-dioscorins) and Dioscorea japonica (Dj-dioscorins), on mouse immune activities. Results from cytokine array indicated that Dj-dioscorins increased the production of tumor necrosis factor (TNF)-α, interleukin (IL)-2, IL-3, IL-6, IL-10, IL-12p40, IL-13, monocyte chemoattractant protein (MCP)-1, regulated on activation, normal T cell expressed and secreted (RANTES), and granulocyte colony-stimulating factor (GCSF) in the spleen cells of BALB/c mice. In RAW264.7 macrophage, Da-dioscorins upregulated the expression of TNF-α, IL-1β, IL-6, IL-10, RANTES, MCP-1, and GCSF genes to a greater extent than Dj-dioscorins did. TNF-α, IL-1β, IL-6, IL-10, and RANTES gene expression was higher in spleen cells than in bone marrow and thymus cells in Da-dioscorin- or Dj-dioscorin-treated BALB/c and C57BL/6. Overall, our results suggest that dioscorins exert distinct immunomodulatory effects on mouse immune cells, and that different mouse strains respond differently to dioscorins.
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Keywords: cytokine array; dioscorin; polymyxin B; traditional herbal medicine

Document Type: Research Article

Affiliations: Department of Life Science and Institute of Biotechnology, National Dong Hwa University, Hualien County 974, Taiwan

Publication date: November 2, 2015

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