The present study aimed to evaluate the anti-diabetic property of peanut shell polyphenol extracts （PSPEs）. Diabetic rats were oral-administrated with PSPE at doses of 50, 100, and 200 mg/kg body weight （BW） per d...The present study aimed to evaluate the anti-diabetic property of peanut shell polyphenol extracts （PSPEs）. Diabetic rats were oral-administrated with PSPE at doses of 50, 100, and 200 mg/kg body weight （BW） per day for 28 consecutive days, with metformin （Met） as a positive control. The results showed that, similar to the Met treatment, administration of PSPE caused significant decreases in food intake, water intake, fasting blood glucose, total cholesterol, triglyceride, low-density lipoprotein cholesterol, and methane dicarboxylic aldehyde in serum, and significant increases in BW, insulin level, high-density lipoprotein cholesterol, superoxide dismutase, glutathione, and liver gly- cogen. Further, glucose tolerance was markedly improved in the PSPE-treated diabetic groups. Histopathological results showed that PSPE improved cellular structural and pathological changes in liver, kidney, and pancreatic islets. Collectively, the results indicated that the hypoglycemic effects of PSPE on high-fat diet/streptozotocin （HFD/STZ）induced diabetes are comparable to Met, though their exact mechanism actions are still under investigation. Therefore, the current study suggests that PSPE could be a potential health-care food supplement in the management of diabetes.展开更多
文摘目的:探究紫甘薯提取物(Purple sweet potato extract,PSPE)对高脂膳食饲喂果蝇寿命的影响及其作用机制。方法:2天龄雌性果蝇随机分为5组,正常组培养于普通培养基中,高脂组于添加10%猪油的高脂培养基中培养,实验组分别在添加PSPE 0.5、1.0、2.0 mg/m L的高脂培养基中培养,每3天更换新鲜培养基,统计果蝇存活率,并计算果蝇平均寿命及最高寿命。测定果蝇体内相关抗氧化酶活力及其基因表达水平。结果:PSPE可以明显延长果蝇的平均寿命及最高寿命。1.0mg/m L PSPE能够显著升高果蝇体内铜锌超氧化物歧化酶(Cu-Zn-superoxide dismutase,Cu-Zn-SOD)、过氧化氢酶(catalase,CAT)活力(P<0.05),降低丙二醛(malonaldehyde,MDA)及蛋白质羰基(Protein carbonyls,PCO)含量(P<0.01);0.5 mg/m L PSPE显著升高果蝇Cu-Zn-SOD、Mn-SOD以及CAT m RNA表达水平(P<0.05),2.0 mg/m L剂量组显著升高果蝇Cu-Zn-SOD及Nrf2 m RNA(P<0.05)表达水平。结论:PSPE能够有效增强果蝇体内的抗氧化能力,延长果蝇寿命,其作用机制可能与升高内源性抗氧化基因的表达有关。
基金Project supported by the China Scholarship Council(No.201306175110)the Major Scientific and Technological Research Project of Jilin Province(No.20140204048NY),China
文摘The present study aimed to evaluate the anti-diabetic property of peanut shell polyphenol extracts （PSPEs）. Diabetic rats were oral-administrated with PSPE at doses of 50, 100, and 200 mg/kg body weight （BW） per day for 28 consecutive days, with metformin （Met） as a positive control. The results showed that, similar to the Met treatment, administration of PSPE caused significant decreases in food intake, water intake, fasting blood glucose, total cholesterol, triglyceride, low-density lipoprotein cholesterol, and methane dicarboxylic aldehyde in serum, and significant increases in BW, insulin level, high-density lipoprotein cholesterol, superoxide dismutase, glutathione, and liver gly- cogen. Further, glucose tolerance was markedly improved in the PSPE-treated diabetic groups. Histopathological results showed that PSPE improved cellular structural and pathological changes in liver, kidney, and pancreatic islets. Collectively, the results indicated that the hypoglycemic effects of PSPE on high-fat diet/streptozotocin （HFD/STZ）induced diabetes are comparable to Met, though their exact mechanism actions are still under investigation. Therefore, the current study suggests that PSPE could be a potential health-care food supplement in the management of diabetes.
