title: Alpinia protocatechuic acid protects against oxidative damage in vitro and reduces oxidative stress in vivo.
abstract: In this study, the neuroprotective effects of Alpinia protocatechuic acid (PCA), a phenolic compound isolated from the dried fruits of Alpinia Oxyphylla Miq. was found. The protective effect of Alpinia PCA against H2O2-induced oxidative damage on PC12 cells was investigated by measuring cell viability via 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) and lactate dehydrogenase (LDH) assays. Rats were injected intraperitoneally with Alpinia PCA at a dose of 5mg/kg per day for 7 days, behavioral testing was performed in Y-maze. In order to make clear the neuroprotective mechanism of Alpinia PCA, the activities of endogenous antioxidants and the content of lipid peroxide in brain were assayed. The results proved that Alpinia PCA significantly prevented the H2O2-induced reduction in cell survival, improved the cognition of aged rats, reduced the content of lipid peroxide, increased the activity of glutathione peroxidase and superoxide dismutase. All these suggested that Alpinia PCA was a potential neuroprotective agent and its neuroprotective effects were achieved at least partly by promoting endogenous antioxidant enzymatic activities and inhibiting free radical generation.
authors.affiliation: Department of Bioscience and Biotechnology, Dalian University of Technology, Dalian, Liaoning 116023, PR China.
authors.forename: Gui-Fang
authors.initials: GF
authors.lastname: Shi
authors.forename: Li-Jia
authors.initials: LJ
authors.lastname: An
authors.forename: Bo
authors.initials: B
authors.lastname: Jiang
authors.forename: Shui
authors.initials: S
authors.lastname: Guan
authors.forename: Yong-Ming
authors.initials: YM
authors.lastname: Bao
mesh_terms: D032429:Alpinia / Q000737:chemistry*; D000818:Animals; D000975:Antioxidants / Q000378:metabolism / Q000494:pharmacology*; D001362:Avoidance Learning / Q000187:drug effects; D001921:Brain / Q000378:metabolism; D002470:Cell Survival / Q000187:drug effects; D004365:Drugs, Chinese Herbal / Q000494:pharmacology; D005979:Glutathione Peroxidase / Q000378:metabolism; D006861:Hydrogen Peroxide / Q000633:toxicity; D062385:Hydroxybenzoates / Q000494:pharmacology*; D008054:Lipid Peroxides / Q000378:metabolism; D008297:Male; D018782:Maze Learning / Q000187:drug effects; D018696:Neuroprotective Agents / Q000494:pharmacology*; D010084:Oxidation-Reduction; D018384:Oxidative Stress / Q000187:drug effects*; D016716:PC12 Cells; D051381:Rats; D017207:Rats, Sprague-Dawley; D013482:Superoxide Dismutase / Q000378:metabolism
chemical_list: D000975:Antioxidants; D004365:Drugs, Chinese Herbal; D062385:Hydroxybenzoates; D008054:Lipid Peroxides; D018696:Neuroprotective Agents; C009091:protocatechuic acid; D006861:Hydrogen Peroxide; D005979:Glutathione Peroxidase; D013482:Superoxide Dismutase