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Comparison of the Effects of a Synthetic Polyribonucleotide with the Effects of Endotoxin on Selected Host Responses

机译:合成多核糖核苷酸与内毒素对某些宿主反应的作用比较

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An injection of a small dose (1 to 50 μg) of synthetic polyriboinosinic acid complexed with polyribocytidylic acid (poly I:poly C) inhibited the induction of tryptophan oxygenase by cortisone acetate; it induced tyrosine amino transferase, and it accelerated the loss of liver glycogen reserves. It also resulted in first a suppression followed by an activation of the reticuloendothelial system as judged by the rates of carbon clearance from blood. All of these responses are elicited by comparable doses of endotoxin. Pretreatment of mice with poly I:poly C did not, or only marginally, increased their nonspecific resistance to infection with several bacterial pathogens, and it failed to result in the development of tolerance to endotoxin, effects known to be produced by endotoxin when given under similar conditions.
机译:少量(1至50μg)的合成聚核糖肌酸与聚核糖苷酸(poly I:poly C)复合,可抑制醋酸可的松对色氨酸加氧酶的诱导。它诱导酪氨酸氨基转移酶,并加速肝糖原储备的损失。根据从血液中碳清除率的判断,这也首先导致抑制,然后激活网状内皮系统。所有这些反应都是由相当剂量的内毒素引起的。用poly I:poly C预处理小鼠并未或仅略微提高了它们对几种细菌病原体感染的非特异性抗性,并且未能导致对内毒素的耐受性的发展,已知内毒素会在以下条件下产生这种作用类似的条件。

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