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- W1769897129 abstract "Tumor necrosis factor-alpha (TNF-alpha) and blood neutrophils (polymorphonuclear leukocytes; PMNs) have been implicated in the pathogenesis of endotoxin (lipopolysaccharide, LPS) hepatotoxicity. However, the mechanism by which these factors mediate liver injury during LPS exposure is uncertain. The objective of this study was to test the hypothesis that TNF-alpha contributes to LPS hepatotoxicity by an indirect, PMN-dependent mechanism. Pretreatment of rats with an antiserum to TNF-alpha afforded protection against liver injury 6 h after LPS exposure. Pretreatment with pentoxifylline (100 mg/kg i.v.), which attenuated the increase in circulating TNF-alpha concentration 1.5 h after administration of LPS, also afforded protection against liver injury. Neither antiserum to TNF-alpha nor pentoxifylline affected hepatic PMN accumulation 1.5 h after LPS exposure. Depletion of circulating PMNs, which protects against LPS hepatotoxicity, enhanced circulating TNF-alpha concentration compared with control rats 1.5 h after LPS exposure. These results suggest that TNF-alpha contributes to liver injury after LPS exposure, but in the absence of circulating PMNs it is insufficient for full manifestation of liver injury. TNF-alpha apparently contributes to the pathogenesis of LPS-induced liver injury by an indirect, PMN-dependent mechanism." @default.
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- W1769897129 date "1993-12-01" @default.
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- W1769897129 title "Relationship between tumor necrosis factor-alpha and neutrophils in endotoxin-induced liver injury" @default.
- W1769897129 doi "https://doi.org/10.1152/ajpgi.1993.265.6.g1011" @default.
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