title: Dioscorea opposita reverses dexamethasone induced insulin resistance.
abstract: The effects of Dioscorea opposita (huai shan yao, HSY) on dexamethasone-induced insulin resistance were investigated in vitro and in vivo. D. opposita extract reduced significantly the blood insulin and glucose levels in dexamethasone-induced diabetic rats. In vitro, HSY significantly enhanced insulin-stimulated glucose uptake in 3T3-L1 adipocytes. Moreover, HSY increase the mRNA expression of GLUT4 glucose transporter in 3T3-L1 adipocytes. These data suggest that D. opposita has insulin sensitivity that is associated with the regulation of GLUT4 expression.
authors.affiliation: Institute of Materia Medica, Di-Ao Pharmaceutical Group, Chengdu 610041, China. gxplww2003@yahoo.com.cn
authors.forename: Xiaoping
authors.initials: X
authors.lastname: Gao
authors.forename: Bogang
authors.initials: B
authors.lastname: Li
authors.forename: Hanwen
authors.initials: H
authors.lastname: Jiang
authors.forename: Fenglin
authors.initials: F
authors.lastname: Liu
authors.forename: Dayong
authors.initials: D
authors.lastname: Xu
authors.forename: Zhongrong
authors.initials: Z
authors.lastname: Liu
mesh_terms: D017667:Adipocytes / Q000187:drug effects / Q000378:metabolism; D000284:Administration, Oral; D000818:Animals; D001786:Blood Glucose / Q000378:metabolism; D003907:Dexamethasone; D003921:Diabetes Mellitus, Experimental / Q000139:chemically induced / Q000188:drug therapy; D027742:Dioscorea; D005260:Female; D051275:Glucose Transporter Type 4 / Q000235:genetics / Q000378:metabolism; D007004:Hypoglycemic Agents / Q000008:administration & dosage / Q000494:pharmacology* / Q000627:therapeutic use; D007328:Insulin / Q000097:blood / Q000378:metabolism*; D008297:Male; D008517:Phytotherapy; D010936:Plant Extracts / Q000008:administration & dosage / Q000494:pharmacology* / Q000627:therapeutic use; D012333:RNA, Messenger / Q000032:analysis; D051381:Rats; D017207:Rats, Sprague-Dawley; D020133:Reverse Transcriptase Polymerase Chain Reaction
chemical_list: D001786:Blood Glucose; D051275:Glucose Transporter Type 4; D007004:Hypoglycemic Agents; D007328:Insulin; D010936:Plant Extracts; D012333:RNA, Messenger; D003907:Dexamethasone