Requirement of Cytokines for Augmentation of the Antigen-Specific Antibody Responses by Ascorbate in Cultured Murine T-Cell-Depleted Splenocytes
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概要
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To gain a better understanding of the possible mechanisms by which a stable form of ascorbate, ascorbic acid 2-glucoside (AA-2G), as an ascorbate source, augments antibody responses, we examined whether AA-2G enhances the anti-sheep-red-blood-cell (SRBC) plaque-forming cell (PFC) responses elicited with distinct interleukins that provide signals for B-cell proliferation and differentiation in cultured murine T-cell-depleted splenocytes. The anti-SRBC PFC responses were markedly reduced by T-cell depletion; and additions of the concanavalin A-stimulated murine splenocytes supernatant (CAS) or interleukin (IL)-1β, IL-2, IL-5, IL-4 or IL-6 to the culture limitedly restored the immune responses. AA-2G synergistically stimulated the anti-SRBC PFC responses in the presence of IL-1β-, IL-2, IL-5 or CAS, IL-1β among these cytokines being most highly affected. However, it failed to enhance the PFC responses elicited by IL-4 or IL-6. Repeated additions of ascorbic acid (AsA) during experimental periods could also produced the enhancing effect, but a single addition of the vitamin did not, because of its instability in the medium. It was shown that exposure to IL-1β, IL-2 or IL-5 must be done at early times after antigen stimulation of the cells to support their optimal responses and that AsA exerted its effect on day 2 and day 3 after the start of culture. These results suggest that AsA may up-regulate the in vitro IgM antibody responses in a cytokine-dependent manner.
- 社団法人 日本薬理学会の論文
- 1998-10-01
著者
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Mitsuzumi Hitoshi
Department of Agricultural, Biological, and Environmental Sciences, Faculty of Agriculture, Tottori
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YAMAMOTO Itaru
Department of Radiology, Kanazawa Medical University
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Yamamoto Itaru
Department Of Immunochemistry Faculty Of Pharmaceutical Sciences Okayama University
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Mitsuzumi Hitoshi
Department Of Immunochemistry Faculty Of Pharmaceutical Sciences Okayama University
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Yamamoto Itaru
Department Of Immunochemistry Faculty Of Pharmaceutical Science Okayama University
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KUSAMIYA Makoto
Department of Immunochemistry, Faculty of Pharmaceutical Sciences, Okayama University
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KURIMOTO Takafumi
Department of Immunochemistry, Faculty of Pharmaceutical Sciences, Okayama University
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Kusamiya Makoto
Department Of Immunochemistry Faculty Of Pharmaceutical Sciences Okayama University
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Mitsuzumi Hitoshi
Department Of Agricultural Biological And Environmental Sciences Faculty Of Agriculture Tottori Univ
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Kurimoto Takafumi
Department Of Immunochemistry Faculty Of Pharmaceutical Sciences Okayama University
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