Objective To investigate the effects of Wuling Powder on insulin resistance of C57BL/6J mice induced by high lipid diet, and discuss the mechanism. Methods C57BL/6J mice were randomly divided into six groups:normal group, model group, rosiglitazone group, Wuling Powder in low, middle, and high dose groups, 10 mice per group. Besides the normal group, other five groups were fed with high fat and sugar diet, with a purpose to establish insulin resistance model. Normal group and model group were given pure water. Rosiglitazone group received a gavage with rosiglitazone of 0.75 mg/kg. Wuling Power low, middle, and high groups received gavage with Wuling Power of 1.23, 3.69, 11.07 g/kg, respectively, the does volume was 0.2 mL/10 g, once a day. The weight and abdominal girth were detected every week. At the end of the sixth week, mice were given 12-hour fasting, and their eyeball were taken for blood. The body weight, length, and fat in abdomen and both kidneys were detected. Paraffin section was made with HE staining. FPG and FINS of each group were detected. ISI and IRI were calculated, and TC and TG were detected. Results Compared with the model group, Wuling Powder can significantly reduce the body weight and abdominal girth of mice (P<0.01, P<0.001), improve liver fatty degeneration, lower the FPG, FINS, TCH, TG, IRI, and increase the ISI in mice (P<0.05, P<0.01). Conclusions Wuling Powder has the effect of preventing insulin resistance of C57BL/6J mice induced by high lipid diet.%目的：观察五苓散对高脂膳食诱导的小鼠胰岛素抵抗的影响,探讨其作用机制。方法将C57BL/6J小鼠随机分为空白组、模型组、罗格列酮组和五苓散低、中、高剂量组,每组10只。除空白组喂食普通饲料外,其他5组均喂食高脂饲料,造成胰岛素抵抗模型。空白组、模型组给予饮用水灌胃,罗格列酮组给予罗格列酮0.75 mg/kg；五苓散低、中、高剂量组给予五苓散药液1.23、3.69、11.07 g/kg灌胃,给药体积0.2 mL/10 g,每日1次。每周测量体质量、腹围。6周末,禁食12 h,摘眼球取血,测量体质量、体长,称量腹部及双肾部脂肪,HE染色制备石蜡切片；测量空腹血糖(FPG)、空腹胰岛素(FINS),计算胰岛素敏感指数(ISI)和胰岛素抵抗指数(IRI),检测总胆固醇(TC)和三酰甘油(TG)。结果五苓散各剂量组小鼠体质量、腹围均明显降低(P＜0.01,P＜0.001),肝脏脂肪变性改善,脂肪含量、脂肪细胞体积和数目、FPG、FINS、TC、TG、IRI水平明显降低,ISI明显升高(P＜0.05,P＜0.01)。结论五苓散具有改善小鼠胰岛素抵抗的作用。
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