Effect of compound preparation of common yam rhizome and balsampear fruit on blood glucose and lipid in rats with type 2 diabetes mellitus
- VernacularTitle:山药苦瓜复方制剂降低2型糖尿病大鼠血糖和血脂的实
- Author:
Zhiping ZHANG
;
Liyi ZOU
;
Tie WU
;
Tingting YOU
;
Yi WU
- Publication Type:Journal Article
- From:
Chinese Journal of Tissue Engineering Research
2006;10(35):180-182
- CountryChina
- Language:Chinese
-
Abstract:
BACKGROUND: Chinese herbs of common yam rhizome, balsampear fruit and bagasse fiber have good effects on decreasing blood glucose and lipid, but its mechanism is unclear.OBJECTIVE: To observe the effect of compound preparation of common yam rhizome and balsampear fruit on blood glucose, lipid, blood insulin and anti-infection of rats with type 2 diabetes mellitus (DM).DESIGN: Randomized controlled animal study.SETTING: Technological Developing Center, Pharmacological Department, Experimental Animal Center, and Central Laboratory of Guangdong Medical College.MATERIALS: A total of 80 female SD rats with 4 months old and of SPF grade were selected in this study. Flumamine (Jilin Dongbeiya Pharmaceutical Co., Ltd., batch number: 040126); total cholesterol (TC), high density lipoprotein cholesterol (HDL-C) and triacylglycerol (TG) (Beijing Zhongsheng Biotechnological Co. Ltd.); Surestep Life scan blood glucose meter and test paper (Johnson Company, USA); insulin radio-immunity kit (Shanghai Navy Medical Institute); UV-3010 ultraviolet spectrophotometer (Japan Shimadzu); compound preparation of common yam rhizome and balsampear fruit (Technological Developing Center of Guangdong Medical College, batch number: 040321); suspension was extracted from common yam rhizome, balsampear fruit and dietary fiber of bagasse through water with 1 kg/L raw materials.METHODS: Animal breeding and samples collecting were carried out in the Experimental Animal Center and Technological Developing Central Laboratory of Guangdong Medical College from June 2004 to December 2005; meanwhile, detection of marker was carried out in the Pharmacological Department and Central Laboratory of Guangdong Medical College. ①Twenty rats were randomly selected as normal control group and perfused with 5 mL/kg saline every day. Other 60 rats were perfused with 5 mL/kg fat emulsion once a day for 4 weeks, and then, rats were fasted for 12hours and peritoneally injected with 2 g/L streptozotocin (30 mg/kg). Rats in normal control group were peritoneally injected with the same volume of citromalic acid buffer. Three days later, blood glucose was measured ranomly and measured again after 2 weeks. If level of blood glucose was igher than 13.5 mmol/L or urinal glucose was ＞ ++ for two weeks, the models were successful (n=48). ② According to random lot method, 48 rats were divided into three groups: model group, flumamine group and comound preparation group with 16 in each group. Rats in model group were perfused with 5 mL/kg fat emulsion; moreover, rats in flumamine groupr and compound preparation group were perfused with 5 mL/kg fat emulsion and then with 1 mg/kg flumamine and 5 mL/kg compound preparation including 1 kg/L raw drug, respectively. Rats in normal control group were perfused with 5 mL/kg saline. All rats in each group were perfused once a day for 6 weeks in total. ③ Value of blood glucose was measured at one day before the experiment finished. Twelve hours after fasting, level of plasma insulin was measured with radio-immunity method; levels of plasma total protein and albumin were measured with spectrophotography; levels of TG, TC and HDL-C were measured with the related kits. ④ Measurement data were compared with analysis of variance (ANOVA). Levene's test was firstly used to evaluate regularity of variance. Bonferroni test was used for regular variance; however, Tamhane's T2 was used.MAIN OUTCOME MEASURES: Effect of compound preparation on levels of blood glucose, insulin, lipid and plasma protein of rats with type 2 DM.RESULTS: Twelve rats were lost because of failure in modeling, and 4rats in model group and 2 in flumamine group died during the experiment,respectively. Therefore, 62 rats were involved in the final analysis. ①Measurement of fasting blood glucose and plasma insulin: Value of fasting blood glucose in normal control group was lower than that in other three groups (t=2.673-4.224, P ＜ 0.05-0.01), but level of plasma insulin was higher than that in other three groups (t=3.780-5.824, P ＜ 0.05-0.01).Fasting insulin in model group was lower than that in compound prepara tion group (t=2.825, P ＜ 0.05); fasting blood glucose was higher than that in flumamine group and compound preparation group (t=3.906, 3.056, P ＜ 0.05); * level of insulin in flumamine group was lower than that in compound preparation group (t=3.014, P ＜ 0.05); level of fasting blood glucose in flumamine group was close to that in compound preparation group (P ＞ 0.05). ② Measurement of lipid: Levels of TC and TG in normal control group were lower than those in other three groups, but level of HDL-C was higher than that in other three groups (t=2.521-4.892, P ＜ 0.05-0.01).Plasma TC in model group was higher than that in flumamine group and compound preparation group (t=2.466-2.512, P ＜ 0.05), value of TG was higher than that in compound preparation group (t=2.612, P ＜ 0.05), and level of HDL-C was lower than that in compound preparation group (t =3.688, P ＜ 0.05). Plasma TG in flumamine group was higher than that in compound preparation group (t=2.620, P ＜ 0.05). ③ Measurement of plasma protein: Levels of plasma total protein were close to each other (P ＞ 0.05). Plasma albumin in normal control group was higher than that in model group and flumamine group (t=3.773, 3.104, P ＜ 0.05), but that was close to that in compound preparation group (P ＞ 0.05). Ratio between albumin and globulin in normal oln that in other groups (t=2.830-3.056, P ＜ 0.05). Level of plasma albumin and ratio between albumin and globulin were lower in model group than those in compound preparation group (t=2.604, 3.808, P ＜ 0.05).CONCLUSION: Compound preparation can decrease levels of blood glucose and lipid, increase content of insulin, and improve anti-infection ability of rats with type 2 DM.
