title: Eucommia ulmoides Oliver leaf extract increases endogenous antioxidant activity in type 2 diabetic mice.
abstract: Eucommia ulmoides Oliver (Du-zhong) leaf extract was investigated for its antioxidant effects in type 2 diabetic animals, C57BL/KsJ-db/db mice. Du-zhong extract equivalent to 1% dried whole Du-zhong leaf (0.187 g of extract/100 g of diet) was added to the experimental diets for 6 weeks. The Du-zhong extract supplement significantly lowered blood glucose concentrations and elevated plasma paraoxonase activity compared with the control group. The activities of erythrocyte superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GSH-Px) were significantly higher in the Du-zhong group compared with the control group, while glutathione reductase (GR) activity was not different between groups. The activities of SOD, GSH-Px, and GR in liver and kidney were not affected by Du-zhong extract supplementation, whereas the CAT activity was significantly higher in the Du-zhong group than in the control group. Du-zhong extract supplementation resulted in lower levels of hydrogen peroxide and lipid peroxide in erythrocytes, liver, and kidney. These results suggest that the antioxidant activity of Du-zhong extract is potentially beneficial for the prevention and management of complications of type 2 diabetes.
authors.affiliation: Department of Food and Nutrition, Yeungnam University, Gyeongsan, Republic of Korea.
authors.forename: Sun Ae
authors.initials: SA
authors.lastname: Park
authors.forename: Myung-Sook
authors.initials: MS
authors.lastname: Choi
authors.forename: Un Ju
authors.initials: UJ
authors.lastname: Jung
authors.forename: Myung-Joo
authors.initials: MJ
authors.lastname: Kim
authors.forename: Dong Ju
authors.initials: DJ
authors.lastname: Kim
authors.forename: Hae-Mo
authors.initials: HM
authors.lastname: Park
authors.forename: Yong Bok
authors.initials: YB
authors.lastname: Park
authors.forename: Mi-Kyung
authors.initials: MK
authors.lastname: Lee
mesh_terms: D000818:Animals; D000975:Antioxidants / Q000378:metabolism*; D043303:Aryldialkylphosphatase / Q000097:blood; D001786:Blood Glucose / Q000032:analysis; D002374:Catalase / Q000097:blood; D003924:Diabetes Mellitus, Type 2 / Q000097:blood / Q000188:drug therapy* / Q000201:enzymology; D004032:Diet; D004912:Erythrocytes / Q000737:chemistry / Q000201:enzymology; D031283:Eucommiaceae / Q000737:chemistry*; D005979:Glutathione Peroxidase / Q000097:blood / Q000378:metabolism; D005980:Glutathione Reductase / Q000097:blood / Q000378:metabolism; D006861:Hydrogen Peroxide / Q000032:analysis / Q000097:blood; D007668:Kidney / Q000737:chemistry / Q000201:enzymology; D008054:Lipid Peroxides / Q000032:analysis / Q000097:blood; D008099:Liver / Q000737:chemistry / Q000201:enzymology; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D008517:Phytotherapy; D010936:Plant Extracts / Q000627:therapeutic use*; D018515:Plant Leaves / Q000737:chemistry*; D011897:Random Allocation; D013482:Superoxide Dismutase / Q000097:blood / Q000378:metabolism
chemical_list: D000975:Antioxidants; D001786:Blood Glucose; D008054:Lipid Peroxides; D010936:Plant Extracts; D006861:Hydrogen Peroxide; D002374:Catalase; D005979:Glutathione Peroxidase; D013482:Superoxide Dismutase; D005980:Glutathione Reductase; D043303:Aryldialkylphosphatase