Antidiabetic potential of Rhodiola sachalinensis root extract in streptozotocin-induced diabetic rats.
In this study, we examined the antidiabetic effect and probable mechanisms of Rhodiola sachalinensis root extract (RS). The extract was examined by thin-layer chromatographic analysis, and the main compound was determined to be a polysaccharide. In streptozotocininduced diabetic rats, RS showed significant hypoglycemic activity by lowering blood glucose (at doses of 200 and 400 mg/kg for 40 days). The levels of serum total cholesterol and triglycerides in RS-treated diabetic rats were lower than in control diabetic rats. A significant increase in the serum insulin levels of diabetic rats following RS treatment was also observed. Furthermore, RS treatment decreased malondialdehyde levels, while increasing superoxide dismutase, catalase and glutathione peroxidase activities of the liver and kidney of diabetic rats. At the same time, RS did not show any significant toxicity in LD(50) and single-cell gel electrophoresis assays. These results indicate that RS has hypoglycemic and hypolipidemic activities and is an effective scavenger of free radicals that inhibits lipid peroxidation. The antioxidant and pancreatic beta-cell-protective activities of RS may be the main mechanisms of the observed antidiabetic effect of RS.
Gao
Dawei
D
Department of Biological Engineering, College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao, China.
Li
Qingwang
Q
Liu
Zhiwei
Z
Feng
Jianhua
J
Li
Jian
J
Han
Zengsheng
Z
Duan
Yanfen
Y
D000818:Animals; D001786:Blood Glucose / Q000187:drug effects; D002855:Chromatography, Thin Layer; D003921:Diabetes Mellitus, Experimental / Q000188:drug therapy*; D004305:Dose-Response Relationship, Drug; D016166:Free Radical Scavengers / Q000008:administration & dosage / Q000494:pharmacology / Q000633:toxicity; D007004:Hypoglycemic Agents / Q000008:administration & dosage / Q000494:pharmacology* / Q000633:toxicity; D007328:Insulin / Q000097:blood; D015227:Lipid Peroxidation / Q000187:drug effects; D008297:Male; D010936:Plant Extracts / Q000008:administration & dosage / Q000494:pharmacology* / Q000633:toxicity; D018517:Plant Roots; D051381:Rats; D017208:Rats, Wistar; D029771:Rhodiola / Q000737:chemistry*; D013311:Streptozocin; D023382:Toxicity Tests, Acute
D001786:Blood Glucose; D016166:Free Radical Scavengers; D007004:Hypoglycemic Agents; D007328:Insulin; D010936:Plant Extracts; D013311:Streptozocin