title: Effects of spiramine T on antioxidant enzymatic activities and nitric oxide production in cerebral ischemia-reperfusion gerbils.
abstract: Spiramine T, an atisine-type diterpene alkaloid isolated from the Chinese herbal medicine Spiraea japonica var. acuta (Rosaceae), was shown to have neuroprotective effects on cerebral ischemia-reperfusion injury. In this study, the effects of spiramine T on antioxidant enzymes and nitric oxide production were evaluated in gerbils subjected to global forebrain ischemia (10 min) and reperfusion (5 days). Spiramine T (1.0 and 2.0 mg kg(-1) i.p.) markedly reduced the content of lipid peroxide (LPO), increased the glutathione peroxidase (GSH-PX) activity, and inhibited the increase of nitric oxidase (NOS) activity and nitric oxide production in the cortex during ischemia-reperfusion in gerbils. These results suggested that the neuroprotective effects of spiramine T were related to modulation of endogenous antioxidant enzymatic activities and reduction of the formation of nitric oxide.
authors.affiliation: Laboratory of Phytochemistry, Kunming Institute of Botany, Chinese Academy of Sciences, Heilongtan, Yunnan, PR China.
authors.forename: Ling
authors.initials: L
authors.lastname: Li
authors.forename: Yue-Mao
authors.initials: YM
authors.lastname: Shen
authors.forename: Xiao-Sheng
authors.initials: XS
authors.lastname: Yang
authors.forename: Wan-Ling
authors.initials: WL
authors.lastname: Wu
authors.forename: Bin-Gui
authors.initials: BG
authors.lastname: Wang
authors.forename: Zhi-He
authors.initials: ZH
authors.lastname: Chen
authors.forename: Xiao-Jiang
authors.initials: XJ
authors.lastname: Hao
mesh_terms: D000818:Animals; D000975:Antioxidants / Q000494:pharmacology*; D002545:Brain Ischemia / Q000188:drug therapy* / Q000201:enzymology / Q000503:physiopathology; D002374:Catalase / Q000187:drug effects / Q000378:metabolism; D002540:Cerebral Cortex / Q000187:drug effects* / Q000201:enzymology / Q000503:physiopathology; D004365:Drugs, Chinese Herbal / Q000494:pharmacology; D005260:Female; D016166:Free Radical Scavengers / Q000494:pharmacology; D005849:Gerbillinae; D005978:Glutathione / Q000378:metabolism; D005979:Glutathione Peroxidase / Q000187:drug effects* / Q000378:metabolism; D006576:Heterocyclic Compounds, 4 or More Rings / Q000494:pharmacology*; D008054:Lipid Peroxides / Q000378:metabolism; D008297:Male; D008315:Malondialdehyde / Q000378:metabolism; D009474:Neurons / Q000187:drug effects / Q000201:enzymology; D009569:Nitric Oxide / Q000096:biosynthesis*; D019001:Nitric Oxide Synthase / Q000187:drug effects / Q000378:metabolism; D018384:Oxidative Stress / Q000187:drug effects / Q000502:physiology; D015427:Reperfusion Injury / Q000188:drug therapy* / Q000201:enzymology / Q000503:physiopathology; D013482:Superoxide Dismutase / Q000187:drug effects / Q000378:metabolism
chemical_list: D000975:Antioxidants; D004365:Drugs, Chinese Herbal; D016166:Free Radical Scavengers; D006576:Heterocyclic Compounds, 4 or More Rings; D008054:Lipid Peroxides; C423865:spiramine T; D009569:Nitric Oxide; D008315:Malondialdehyde; D002374:Catalase; D005979:Glutathione Peroxidase; D019001:Nitric Oxide Synthase; D013482:Superoxide Dismutase; D005978:Glutathione