Abstract
The effect of reticuloendothelial system activation on hepatic regeneration after 70% hepatectomy was investigated. OK-432, a killed streptococcal preparation which increases reticuloendothelial system function, was administered to rats prior to 70% hepatectomy. Hepatic incorporation of 3H-thymidine 24 h after 70% hepatectomy was enhanced by OK-432 pretreatment. DNA synthesis was greater in pretreated than in control rats and correlated highly with reticuloendothelial system phagocytic activity prior to surgery. Methyl palmitate, which decreases reticuloendoethelial system function, was administered to rats prior to 70% hepatectemy. Hepatic incorporation of 3H-thymidine 24 h after 70% hepatoctomy was significantly depressed by methylpalmitate-pretreatment. These data suggest that reticuloendothelial system palys a role in liver regeneration and that hepatocyte proliferation might be enhanced by protection from surgical stress and endotoxins with reticuloendothelial system stimulation by OK-432.
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