title: Characterization and protection on acute liver injury of a polysaccharide MP-I from Mytilus coruscus.
abstract: In this study, we analyzed a water-soluble polysaccharide MP-I isolated from Mytilus coruscus. MP-I was obtained by hot-water extraction, anion-exchange and gel-permeation chromatography. Complete hydrolysis, periodate oxidation, methylation analysis, as well as Fourier transform infrared spectroscopy (FTIR) and nuclear magnetic resonance (NMR) spectroscopy were conducted to elucidate its structure. MP-I was subjected to investigate the protective effect on carbon tetrachloride (CCl(4)) induced liver damage in male Kunming mice. Based on the data obtained, MP-I was found to be an alpha-(1-->4)-D-glucan, branched with a single alpha-D-glucose at the C-6 position every eight residue, on average, along the main chain. Based on the calibration with Dextran, the glucan had a molecular weight of about 1.35 x 10(6) Da. Pharmacological studies revealed that MP-I could decrease serum alanine aminotransferase (ALT), serum aspartate aminotransferase (AST), and hepatic malondialdehyde aldehydes (MDA) levels, increase the hepatic total superoxide dismutase (T-SOD) activity, and improve hepatic damage in the CCl(4) induced liver injury in mice in a dose-dependent manner. The results suggest that the possible mechanism is due to its antioxidant activity of MP-I.
authors.affiliation: Department of Biochemistry and Molecular Biology, College of Basic Medical Sciences, Second Military Medical University, Shanghai 200433.
authors.forename: Hongli
authors.initials: H
authors.lastname: Xu
authors.forename: Tingting
authors.initials: T
authors.lastname: Guo
authors.forename: Yi-feng
authors.initials: YF
authors.lastname: Guo
authors.forename: Jianp eng
authors.initials: Je
authors.lastname: Zhang
authors.forename: Yang
authors.initials: Y
authors.lastname: Li
authors.forename: Weihua
authors.initials: W
authors.lastname: Feng
authors.forename: Binghua
authors.initials: B
authors.lastname: Jiao
mesh_terms: D000818:Animals; D000975:Antioxidants / Q000737:chemistry* / Q000302:isolation & purification / Q000627:therapeutic use*; D002251:Carbon Tetrachloride; D056486:Chemical and Drug Induced Liver Injury; D005936:Glucans / Q000737:chemistry* / Q000302:isolation & purification / Q000627:therapeutic use*; D008099:Liver / Q000187:drug effects* / Q000201:enzymology / Q000378:metabolism; D008107:Liver Diseases / Q000378:metabolism / Q000517:prevention & control*; D008297:Male; D051379:Mice; D008815:Mice, Inbred Strains; D049878:Mytilus / Q000378:metabolism*; D011134:Polysaccharides / Q000737:chemistry* / Q000302:isolation & purification / Q000627:therapeutic use*
chemical_list: D000975:Antioxidants; D005936:Glucans; C527667:MP-I polysaccharide, Mytilus coruscus; D011134:Polysaccharides; D002251:Carbon Tetrachloride