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- W2071065215 abstract "This study was designed to investigate the in vivo effect of nickel sulfate on the pulmonary non-specific immune defences. Groups of four male Wistar rats were treated with a single intratracheal instillation of NiSO(4) at different doses: 1, 2, 4 and 8 micromol of NiSO(4) per rat. Control rats received a corresponding instillation of the saline vehicle. The effect of NiSO(4) on the cytotoxic activity of the pulmonary natural killer (NK) cells and alveolar macrophages (AM), as well as the pulmonary production of cytokines such as alpha-tumor necrosis factor (TNF-alpha) and gamma-interferon (IFN-gamma), were examined 1, 2 and 7 days later. Spontaneous NK-cytotoxicity towards mouse-derived tumor cell line, Yac-1 was suppressed 1 day after treatment at doses of 2 micromol/rat and above with only one result significant (P<0.05); 2 days after treatment the suppression was increased with all results significant at the same doses; 1 week after treatment NK activity restoration was observed except for the highest dose, 8 micromol/rat. AM-mediated cytotoxicity towards mouse-derived tumor cell line, 3T12, did not show any significant difference in treated and untreated animals. In contrast, whereas moderate levels of TNF-alpha were detected in the broncho-alveolar lavage (BAL) fluid supernatants of controls, the NiSO(4) treatment highly suppressed TNF-alpha production with a maximum observed after 2 days. TNF-alpha suppression was found to be transient, at least with the lowest NiSO(4) dose, with levels returning to normal after 7 days. A non-significant increase in IFN-gamma was observed in the BAL fluids of treated animals at each time of examination. Taken together, these results indicate that NK cell activity and TNF-alpha secretion are sensitive targets for instilled NiSO(4) in Wistar rats." @default.
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- W2071065215 date "2000-04-01" @default.
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- W2071065215 title "Effects of nickel sulfate on pulmonary natural immunity in Wistar rats" @default.
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- W2071065215 doi "https://doi.org/10.1016/s0300-483x(99)00216-4" @default.
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