title: Effects of insulin-mimetic vanadyl-poly(gamma-glutamic acid) complex on diabetic rat model.
abstract: Poly-gamma-glutamic acid (gamma-PGA) prepared by fermentation of microbe was used as drug carrier for vanadium sulfate to obtain vanadyl-poly-gamma-glutamic acid (VO-gamma-PGA) complex. The FI-IR spectrum of the complex demonstrated that the expected VO-gamma-PGA complex is formed by the coordination of VO(2+) through the side chain carboxylic groups of the gamma-PGA. Studies of the complex in treating type I diabetes were carried out on alloxan induced diabetes rats. The results of treating the rats in 2 weeks and then stopping administration for 10 days showed that VO-gamma-PGA can effectively lower blood glucose levels of diabetic rats during administration. But after ceasing treatment there were no differences between groups in blood glucose level and water intake. The results of oral glucose tolerance and some serum parameters also demonstrated that VO-gamma-PGA was more effective than vanadium sulfate in treating diabetic rats.
authors.affiliation: Laboratory of Molecular Biology, School of Life Science, East China Normal University, 3663 Zhongshan North Road, Shanghai 200062, PR China.
authors.forename: Rongzhang
authors.initials: R
authors.lastname: Hu
authors.forename: Chengliang
authors.initials: C
authors.lastname: He
authors.forename: Jian
authors.initials: J
authors.lastname: Liu
authors.forename: Yelin
authors.initials: Y
authors.lastname: Wu
authors.forename: Jing
authors.initials: J
authors.lastname: Li
authors.forename: Zhen
authors.initials: Z
authors.lastname: Feng
authors.forename: Jing
authors.initials: J
authors.lastname: Huang
authors.forename: Xu Guang
authors.initials: XG
authors.lastname: Xi
authors.forename: Zirong
authors.initials: Z
authors.lastname: Wu
mesh_terms: D000496:Alloxan; D000818:Animals; D001786:Blood Glucose / Q000187:drug effects; D003920:Diabetes Mellitus / Q000139:chemically induced / Q000188:drug therapy*; D007004:Hypoglycemic Agents / Q000008:administration & dosage / Q000737:chemistry / Q000627:therapeutic use*; D008297:Male; D011099:Polyglutamic Acid / Q000008:administration & dosage / Q000737:chemistry / Q000627:therapeutic use*; D051381:Rats; D014638:Vanadates / Q000008:administration & dosage / Q000737:chemistry / Q000627:therapeutic use*; D014639:Vanadium / Q000627:therapeutic use
chemical_list: D001786:Blood Glucose; D007004:Hypoglycemic Agents; C529536:vanadyl-poly (gamma-glutamic acid); D014639:Vanadium; D011099:Polyglutamic Acid; D014638:Vanadates; D000496:Alloxan