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- W2169192103 abstract "Several studies have shown that polymorphonuclear neutrophil leukocyte (PMN) margination is an early and critical event in the pathogenesis of gastric mucosal injury caused by nonsteroidal anti-inflammatory drugs. Tumor necrosis factor (TNF) alpha is a proinflammatory cytokine that causes PMN margination by up-regulating expression of adhesion molecules on both PMN and endothelial cells. This study investigated whether substances that modulate TNF synthesis and release influence PMN margination and indomethacin-induced gastric damage.Rats were treated with several doses of indomethacin alone or in association with substances known to increase (interleukin 2 and lipopolysaccharide) or inhibit (pentoxifylline, dexamethasone, granulocyte colony-stimulating factor [G-CSF]) TNF synthesis and release.Indomethacin administration caused dose-dependent damage and increased PMN margination and plasma TNF concentrations. Pretreatment with interleukin 2 and lipopolysaccharide significantly increased TNF release, PMN margination, and gastric mucosal damage, but administration of dexamethasone, pentoxifylline, and G-CSF provided almost total protection. The administration of G-CSF alone caused a significant increase in gastric PMN margination but protected against the indomethacin-induced gastropathy.Agents that regulate TNF synthesis and release influence gastric susceptibility to indomethacin by modulating PMN margination. G-CSF increased PMN infiltration but protected against the mucosal injury, suggesting that PMN margination alone is not sufficient to induce mucosal damage." @default.
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- W2169192103 date "1995-02-01" @default.
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- W2169192103 title "Role of tumor necrosis factor α release and leukocyte margination in indomethacin-induced gastric injury in rats" @default.
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- W2169192103 doi "https://doi.org/10.1016/0016-5085(95)90065-9" @default.
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