丹参肠内营养防护兔多脏器损伤的研究

目的:探讨丹参(DS)肠内营养对内毒素所致大白兔多脏器损伤的防护作用。方法:将近交系纯种大耳白幼兔44只,按体重随机分为正常对照组(N)、内毒素攻击组(LPS)、内毒素攻击+能全力组(LPS+EN)和肉毒素攻击+DS肠内营养组(LPS+DS),除正常对照组8只外,其余三组均为12只。内毒素攻击前3d始,LPS+DS组每日给予DS肠内营养液80ml/kgbw(其中每100ml营养液含丹参15g)灌胃,LPS+EN组按每日给予能全力营养液80ml/kgbw灌胃,N组灌胃等量生理盐水,至试验结束。同时观察:动物血清超氧化物歧化酶(SOD)、丙二醛(MDA)、内毒素、小肠粘液SIgA含量。整个实验期为10d。动物处死后,取心脏、肝脏、肾脏、小肠、肺进行组织形态学检查。结果:病理检查显示,LPS组小肠绒毛损伤、坏死、绒毛变短;肝脏可致汇管区出血、胞浆气球样变等;肺和肾脏也有变化。而LPS+DS组可见小肠绒毛损伤较轻,间隙致密。绒毛高度有轻微减少。其他脏器损伤较轻。内毒素攻击后,LPS+DS组血清MDA水平显著低于LPS组,内毒素水平亦低于LPS组,小肠粘液SIgA含量LPS+DS组高于LPS组。结论:DS肠内营养可以减少氧化损伤,维持肠道粘膜细胞的结构和功能,提高小肠免疫球蛋白的释放,对多脏器损伤防护有一定作用。

STUDY ON THE PROTECTIVE EFFECT OF ENTERAL NUTRITION WITH SALVIA MILTIORRHIZA AGAINST MULTIPLE ORGANS INJURIES IN RABBITS

Objective: To study the protective effect of enteral nutrition with Salvia miltiorrhiza on injuries multiple organs in rabbits. Method: Forty-four rabbits were randomly divided into four groups: Normal control group (N) 8 rabbits, Endotoxin group (LPS), Enteral nutrition group (LPS+EN) and Enteral nutrition with Salvia miltiorrhiza group (LPS+DS),each 12 rabbits. Three days before given endotoxin, LPS+DS group was fed enteral nutrition fluid with Sallvia miltiorrhiza 80 ml/kg bw (15g salvia per 100 ml fluid) and LPS+ EN group was fed enteral nutrition only.N group was fed the same quantity of normal saline. At the end of 10 d, the rabbits were killed and serum SOD, MDA, endotoxin and intestinal mucus SIgA contents were determined. Small intestine, liver, lung, kidney and heart were taken for pathological examination. Results: Serum MDA of LPS+DS group was much lower than LPS group, endotoxin level also lower , but intestinal SIgA content higher LPS group . The pathological examination showed that the intestinal villi were shortend, injured , and necrotic in LPS group; liver was hemorrhagic at portal area with cytoplasmic vacuolization, lung and kidney were also injuried pathologically. These pathological features were comparatively mild in LPS+EN group and much better in LPS+ DS group. Conclusion: Enteral nutrition with Salvia miltiorrhiza may reduce the oxidative damages of multiple organs induced by endotoxin as shown by increased SIgA of small intestine, maintenance of intestinal mucosa integrity and alleviation of pathological changes of multiply organs in rabbits.