六味地黄丸对OLETF鼠糖尿病发病的干预研究

Effect of Liuweidihuang pills in preventing diabetes mellitus in OLETF rats

目的通过观察六味地黄丸对自发性2型糖尿病OLETF大鼠脂肪组织脂联素的影响,探讨六味地黄丸对2型糖尿病发病的干预作用。方法自发性2型糖尿病大鼠OLETF鼠40只,随机分为六味地黄丸干预组和对照组,LETO鼠10只作为正常对照组。干预组从8周龄起以六味地黄丸2.4mg·kg-1·d-1灌胃给药,其余两组以等量清水灌胃。定期口服葡萄糖耐量试验。于8、32和40周龄时分批宰杀大鼠。采用半定量逆转录PCR方法,检测脂肪组织脂联素mRNA表达水平。结果六味地黄丸能够显著降低OLETF鼠血糖升高程度,延缓高血糖的出现。与对照组相比,干预组脂肪组织脂联素mRNA表达量明显增加。干预组糖尿病的发病率显著低于同时期对照组(P<0.01)。LETO组无IGT或糖尿病发生。结论六味地黄丸能明显增加OLETF鼠脂肪组织脂联素表达水平;六味地黄丸可显著降低2型糖尿病动物模型OLETF鼠糖尿病的发病率,有效预防糖尿病的发生。

Objective To study the effects of Liuweidihuang pills in preventing diabetes in Otsuka Long-Evans Tokushima Fatty （OLETF） rats. Methods Forty male OLETF rats were randomized equally into Liuweidihuang pill group and control group, with 10 male LETO rats as the normal control group. In Liuweidihuang pill group, the rats were given the pills intragastrically at the daily dose of 2.4 mg/kg since 8 weeks of age, and the rats in the other two groups received water instead. Blood glucose of the rats was determined by oral glucose tolerance test （OGTT）, and the body weight and food intake were monitored on a weekly basis. At 8, 32 and 40 weeks, the rats were sacrificed and the expression level of adiponectin mRNA in the adipose tissue was detected using RT-PCR. Results Treatment with Liuweidihuang pills significantly lowered the increment of the blood glucose and postponed the onset of hyperglycemia in the rats. Compared with the control group, the rats in Liuweidihuang pill group showed significantly increased expression of adiponectin mRNA in the adipose tissue. The rats receiving Liuweidihuang pills developed diabetes at 30 weeks of age with an incidence of 28.6% at 40 weeks, significantly lower than that in the control group （P0.01）. Conclusion Liuweidihuang pills can significantly increase the expression of adiponectin mRNA in the adipose tissue and decrease the incidence of type 2 diabetes in OLETF rats.