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- W2013170987 abstract "Abstract The present study was done to evaluate glucocorticosteroid modulation of the individual cells contributing to tumor-induced dualistic (macrophage and suppressor T-cell) suppression in mitogen-induced lymphocyte proliferation. Steroid-sensitive T cells from normal mice showed a characteristic decrease in phytohemagglutinin responsiveness in the in vitro presence of 0.1 μg hydrocortisone sodium-21 succinate (HC), while tumor-bearing host (TBH) T cells demonstrated little or no decrease. This correlates well with kinetic study results demonstrating decreased HC-mediated suppression of mitogen-induced TBH T-cell DNA synthesis at 8 to 10 days posttumor cell inoculation. Hydrocortisone-treated cells from mice with advanced tumors had significantly higher degrees of blastogenesis than untreated TBH cells. In the optimal presence of both macrophages (Mφ) and HC, TBH cells had significantly greater blastogenesis than their normal counterparts. Alone, Mφ or HC depressed normal host PHA responsiveness. Experiments were carried out to determine if the increased blastogenesis was due to the additional Mφ presence in TBH. In vivo administration of methylprednisolone acetate demonstrated that steroids can inhibit tumor growth. A significant delay in tumor appearance occurred when the steroid was administered 4 to 7 days after tumor transplant perhaps due to the measurable lack of suppressor T cells. These studies indicated that steroid suppression was directed against a sensitive suppressor T cell and possibly acts by preventing its differentiation. The role of the Mφ in the afferent limb of the cell-mediated immune response seems less clear, but the results suggest nonspecific inhibition of TBH T-cell response to blastogenic stimulus." @default.
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- W2013170987 date "1980-10-01" @default.
- W2013170987 modified "2023-09-27" @default.
- W2013170987 title "Glucocorticosteroid modification of lymphocyte blastogenesis in tumor-bearing hosts" @default.
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- W2013170987 doi "https://doi.org/10.1016/0008-8749(80)90167-7" @default.
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