Astragalus polysaccharide (APS, 100 mg / kg / d) or physiological saline solution (PSS) was administrated by mouth to the rats of the treatment group and control group until they were euthanatized.

• 实验组大鼠每天按100mg/kg体重灌喂黄芪多糖(astragaluspolysaccharide,APS),直至实验结束,而对照组大鼠灌喂相应体积的生理盐水(physiologicalsalinesolution,PSS)。