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- W2015502202 abstract "Our purpose was to determine the ability of an ovarian epithelial carcinoma cell line, Caov-3, to alter the bioactivity of exogenously added tumor necrosis factor-alpha.Caov-3 cells were cultured for up to 6 days in Dulbecco's modified Eagle's medium containing 10% fetal calf serum. The control and tumor necrosis factor-alpha-treated cells were analyzed for proliferation, distribution throughout the cell cycle by flow cytometry, their ability to release bioactive tumor necrosis factor-alpha by L929 bioassay, and their ability to release immunoreactive tumor necrosis factor-alpha by a specific double sandwich enzyme-linked immunosorbent assay.Tumor necrosis factor-alpha induced a dose- and time-dependent inhibition of cell proliferation accompanied by accumulation of cells in late S and G2/M phases of the cell cycle. Tumor necrosis factor-alpha bioactivity was undetectable in the media of control Caov-3 cell cultures, but these cells exhibited TNF-alpha messenger ribonucleic acid. After culture of the cells for 2 days in the presence of various doses of TNF-alpha (0.1, 1.0, 10, or 100 ng/ml), a significant decline (p < 0.01) in bioactivity was observed in all groups with the exception of 100 ng of TNF-alpha. Further declines in bioactivity were observed 2 and 4 days later. Addition of TNF-alpha to Caov-3 cells did not affect its immunoactivity, and Western blots of media revealed major bands of immunoactivity at approximately 17 kd, the expected molecular size of TNF-alpha.These results indicate that Caov-3 ovarian carcinoma cells reduce the bioactivity of TNF-alpha, an important growth regulator, by a novel yet unknown mechanism to escape the modulatory effects of the normal immune response during cancer cell growth." @default.
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- W2015502202 date "1995-11-01" @default.
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- W2015502202 title "Reduction of tumor necrosis factor-α bioactivity by a human ovarian epithelial cancer cell line in vitro" @default.
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- W2015502202 doi "https://doi.org/10.1016/0002-9378(95)90635-5" @default.
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