Effect of Chinese herb for benefiting qi, nourishing yin, activating blood circulation and resolving stasis on lipid metabolic disturbance and protein nonenzyme glycosylation in diabetic rats
- VernacularTitle:益气养阴、活血化瘀中药对糖尿病大鼠脂代谢紊乱及蛋白质非酶糖基化的影响
- Author:
Hong DAI
- Publication Type:Journal Article
- From:
Chinese Journal of Tissue Engineering Research
2005;9(47):174-176
- CountryChina
- Language:Chinese
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Abstract:
BACKGROUND: It has been testified that it is hard for strict individualized insulin treatment to block or reverse the incidence and development of diabetic complications. The best therapeutic effect is obtained by early intervention of Chinese herb for benefiting qi, nourishing yin, activating blood circulation and resolving stasis at the same time of controlling blood glucose.OBJECTIVE: To observe the effect of huaxiaoyin (HXY), the Chinese herb for reinforcing qi, nourishing yin, promoting blood circulation and re solving stasis on blood lipid, collagen content and fluorescence degree of collagen-protein advanced glycation end products(AGEs) in thoracic aorta in diabetic rats.DESIGN: Complete randomized group division and control experiment were designed.SETTING: Traditional Chinese Medicine Department of Diagnostics,Hubei College of Traditional Chinese Medicine MATERIALS: The experiment was performed in Center Experimental Room of Hubei College of Traditional Chinese Medicine from May 2001 to August 2002, in which, 90 Wistar pedigree rats of clean grade were employed.METHODS: ① 12 rats were randomized in normal control. For the rest 78 rats, after 12-hour fasting, streptozotocin (STZ) was intravenously injected from tail at 50 mg/kg for one time. 72 hours later, it was assayed that 16.65 mmoL/L ＜ fasting blood sugar ＜ 33.3 mmol/L indicated successful modeling. Totally 76 rats had been modeled successfully. Diabetic rats were randomized into 5 groups, named model group (n=16), insulin group (n=15), HXY low-dose group (n=15), HXY middle-dose group (n=15) and HXY high-dose group (n=15). ② In normal control group and model group, gastric perfusion was prescribed with normal saline 4 mL. In insulin group, protamine zinc insulin 1-2U was injected subcutaneously. In HXY low, middle and high-dose groups, besides, subcutaneous injection of protamine zinc insulin 1.0-2.0U, HXY was administered [composed of shanyao (Rhizoma Dioscoreae), shengdi (Radix Rehanniae), huafen (Radix Trichosanthis), danshen (Radix Salviae Miltiorrhizae), huangqi (Radix Astragali), zhimu (Rhizoma Anemarrhenae), totally 12 herbs, the content of raw herbs was 2 g/mL] at 0.75, 1.5, 2.0 kg/L, 4 mL for each respectively. Gastric perfusion was administered once every day in above 6 groups,and the treating course was 8 weeks. ③ Before treatment, on the 3rd, 6th and 8th weeks after treatment, fasting blood sugar was tested with One Touch Ⅱ tester. 8 weeks later, automatic biochemistry analyzer was used to assay triglyceride (TG), total cholesterol (TC), low-density lipoprotein cholesterol (LDLC) and high-density lipoprotein cholesterol (HDLC). Thoracic aorta was collected swiftly and chloramine-T method was used to assay hydroxyproline content in the extract from aorta. Hydroxyproline content ×7.14=collagen content. Fluorescence spectrometer was used to assay the fluorescence degree of AGEs in collagen extract. ④ t test was applied for difference comparison of measurement data.MAIN OUTCOME MEASURES: ① Comparison of fasting blood sugar before and after treatment in each group. ② Comparison of blood lipid,collagen content and fluorescence degree of collagen-protein AGEs in thoracic aorta in 8 weeks after treatment in each group.RESULTS: At the end of experiment, 8, 4, 2, 2 and 3 rats were died in model group, insulin group, HXY low, middle and high-dose groups respectively, due to which, 12, 8, 11, 13, 13 and 12 rats entered result analysis in various groups respectively. ① Fasting blood sugar: Before treatment, it was higher remarkably in model and various treating groups compared with normal control (P ＜ 0.01) and 8 weeks after treatment, it was lower remarkably in insulin group and various HXY groups compared with model group and before treatment (P ＜ 0.01). ② Levels of TC, TG, LDLC in serum: Those in insulin and model groups were higher remarkably than normal control (P ＜ 0.05-0.01). Those in insulin group and various HXY groups were lower remarkably than normal group (P ＜ 0.05-0.01). ③ Level of HDLC: It was lower remarkably in insulin group and model group compared with normal control (P ＜ 0.05-0.01), it was higher remarkably in HXY low and middle-dose groups compared with model group (P ＜ 0.01),it was higher remarkably in HXY low-dose group than insulin group (P ＜ 0.05).④ Levels of TC and TG in serum: Those in various HXY groups were lower remarkably than insulin group (P ＜ 0.05). ⑤ Collagen content in thoracic aorta: It was lower remarkably in various HXY group than insulin group (P ＜ 0.05), it was higher remarkably in model, insulin and HXY high-dose groups than normal control group (P ＜ 0.05-0.01) and it was lower remarkably in insulin group and various HXY group than model group (P ＜ 0.05-0.01). ⑥ Fluorescence degree of AGEs: It was lower remarkably in HXY low-dose group compared with insulin group (P ＜ 0.05),it was higher in model group compared with normal control (P ＜ 0.01) and it was lower remarkably in HXY low and middle-dose groups compared with model group (P ＜ 0.01).CONCLUSION: ①HXY, herbal formula for reinforcing qi, nourishing yin, clearing away and promoting blood circulation, increases HDLC and decreases TG, TC and LDLC to different degrees so as to improve lipid metabolic disturbance in diabetic rats, which is especially advantageous at low dose (0.75 kg/L, 4 mL). ② By reducing collagen content of thoracic aorta and decreasing fluorescence degree of collagen-protein AGEs, HXY inhibits collagen nonenzymatic glycosylation in thoracic aorta in diabetic rats.
