title: In vivo protective effect of Porphyra yezoensis polysaccharide against carbon tetrachloride induced hepatotoxicity in mice.
abstract: To study the protective effect and possible mechanism of Porphyra yezoensis polysaccharide (PYP) in hepatotoxicity mice, acute liver injury was successfully induced by injecting 0.2% carbon tetrachloride (CCl(4)) intraperitoneally. Levels of alanine aminotransferase (ALT) and aspartate aminotransferase (AST) in serum and liver homogenate, content of malondialdehyde (MDA), activities of total superoxide dismutase (T-SOD) in liver were measured by biochemical methods. Liver index was calculated and pathological changes of the liver tissue were observed microscopically. PYP was found to significantly decrease the activities of ALT and AST (P<0.05), to remarkably lower the liver indexes and MDA level in hepatical tissues in mice (P<0.05), and to upregulated the lower T-SOD level in liver homogenate (P<0.01). Furthermore, histologic examination showed that PYP could attenuate and the extent of necrosis, reduce the immigration of inflammatory cells. PYP plays a protective action against hepatotoxicity induced by CCl(4) in mice, and its mechanisms may be related to free radical scavenging, increasing SOD activities and anti-lipid peroxide.
authors.affiliation: Department of Aqua-Life Science and Technology, Shanghai Fisheries University, Shanghai 200090, China. ttguo@shfu.edu.cn
authors.forename: Ting-ting
authors.initials: TT
authors.lastname: Guo
authors.forename: Hong-li
authors.initials: HL
authors.lastname: Xu
authors.forename: Lu-xi
authors.initials: LX
authors.lastname: Zhang
authors.forename: Jian-peng
authors.initials: JP
authors.lastname: Zhang
authors.forename: Yi-feng
authors.initials: YF
authors.lastname: Guo
authors.forename: Jia-wen
authors.initials: JW
authors.lastname: Gu
authors.forename: Pei-min
authors.initials: PM
authors.lastname: He
mesh_terms: D000410:Alanine Transaminase / Q000097:blood; D000818:Animals; D000975:Antioxidants / Q000494:pharmacology*; D001219:Aspartate Aminotransferases / Q000097:blood; D002251:Carbon Tetrachloride / Q000633:toxicity*; D056486:Chemical and Drug Induced Liver Injury / Q000209:etiology / Q000378:metabolism / Q000473:pathology / Q000517:prevention & control*; D018890:Chemoprevention; D004305:Dose-Response Relationship, Drug; D008099:Liver / Q000187:drug effects / Q000201:enzymology / Q000473:pathology; D008297:Male; D008315:Malondialdehyde / Q000378:metabolism; D051379:Mice; D008815:Mice, Inbred Strains; D009336:Necrosis / Q000139:chemically induced / Q000517:prevention & control; D018384:Oxidative Stress / Q000187:drug effects; D010936:Plant Extracts / Q000494:pharmacology; D011134:Polysaccharides / Q000494:pharmacology*; D044664:Porphyra / Q000737:chemistry*; D013482:Superoxide Dismutase / Q000378:metabolism
chemical_list: D000975:Antioxidants; D010936:Plant Extracts; D011134:Polysaccharides; D008315:Malondialdehyde; D002251:Carbon Tetrachloride; D013482:Superoxide Dismutase; D001219:Aspartate Aminotransferases; D000410:Alanine Transaminase