Synergistic damage of burns combined with endotoxemia on the intestinal mucosa / 重庆医学

ABSTRACT

Objective　An animal model in which rats were subjected to 20% TBSA Ⅲ degree burns combined with injection of LPS(1mg/kg B.M.)was used for this experiment.Dynamic changes of platelet-activating factor(PAF),tumor necrosis factor(TNF),xanthine oxidase(XO) and melondialdehyde(MDA) in the intestinal tissue were measured to investigate mechanism and characteristics of the intestinal mucosal damage. The results showed a series of early pathogenic changes in the intestinl mucosa were founded,level of intestinal tissue PAF, XO and MDA level in BCEG was higher than that of any other groups at most times, XO and MDA was more positively correlated with PAF respecively after burns combined with endotoxin injection (P<0.005,P<0.001)，during the peak phase of PAF, intestinal mucosal damage was more evident. It suggests there is synergistic effect on the early intestinal mucosal damage due to activation of mucosal cells,release of PAF and TNF, activation of intestinal epithelial XO, production of free radicals and strengthenment of lipoperoxidation after burns combined with endotoxemia