热限及热限加致热原负荷时发热效应的研究

为研究内毒素(ET)和内生致热原(EP)热限的形成机制,观察家兔静脉注射不同剂量ET和EP的发热效应。确定ET及EP的热限剂量后对ET与EP热限的发热水平以及热限加不同致热原负荷时发热水平的变化进行观察比较。实验表明:1.ET热限水平明显高于EP热限水平,提示ET性发热及热限的形成机制与EP性发热及热限形成机制有所不同。2.EP热限加ET负荷使发热高度突破了EP热限,而ET热限加EP负荷则未能使发热高度超过ET热限的水平。表明ET热限包含了EP热限,即EP热限是构成ET热限的重要成因,但不是全部。ET性发热及热限的机制中还有EP以外的因素参与。

Study on the fever reaction during hyperthermic ceiling and hyperthermic ceiling plus pyrogen load

In order to study mechanisms of endotoxin (ET) and endogenous pyrogen (EP) byperthermic ceilings, the febrile responses induced in rabbits by intravenous injection of varying doses of EP were observed, and the doses in which the febrile reactions of rabbits to ET and EP are limited by hyperthermic ceiling were identified. Furthermore, the febrile reactions of typerttermic ceiling plus different pyrogen load were observed. T, e experiment stowed: 1. The level of ET hypert ermic ceiling is notably higher in comparison to that of EP hypertiermic ceiling. The findings indicated that the mechanisms of ET fever and ET Lyperthermic ceiling are different from those of EP fever and EP hyperthermic ceiling. 2. After EP hyperthermic ceiling was added the load of ET. the altitude of fever exceeded the EP hyperthermic ceiling; but after ET hypertthermic ceiling was added the load of EP, the altitude couldn't exceed ET hyperthermic ceiling. The results suggested that ET hyperthermic ceiling contained EP hyperttermic ceiling. The latter was an important component of ET hyperttermic ceiling, but there are other factors participating in the mechanisms of ET fever and ET hyperthermic ceiling except EP.