title: Biotransformed blueberry juice protects neurons from hydrogen peroxide-induced oxidative stress and mitogen-activated protein kinase pathway alterations.
abstract: A growing body of evidence supports the therapeutic effects of blueberry in neurodegenerative disorders. Biotransformation of blueberry juice by Serratia vaccinii bacteria increases its phenolic content and antioxidant activity. In neuronal cell culture, biotransformed blueberry juice (BJ) significantly increased the activity of antioxidant enzymes, namely catalase and superoxide dismutase. Moreover, BJ protected neurons against H2O2-induced cell death in a dose-dependent manner. This associated with the upregulation of mitogen-activated protein kinase (MAPK) family enzymes p38 and c-Jun N-terminal kinase (JNK) activation, as well as with the protection of extracellular signal-regulated kinase (ERK1/2) and MAPK/ERK kinase (MEK1/2) activity loss induced by H2O2. The present studies demonstrate that BJ can protect neurons against oxidative stress possibly by increasing antioxidant enzyme activities and activating p38- and JNK-dependent survival pathways while blocking MEK1/2- and ERK1/2-mediated cell death. Thus, BJ may represent a novel approach to prevent and to treat neurodegenerative disorders, and it may represent a source of novel therapeutic agents against these diseases.
authors.affiliation: Natural Health Products and Metabolic Diseases Laboratory, Department of Pharmacology and Montreal Diabetes Research Center, University of Montreal, PO Box 6128, Downtown Station, Montreal, QC, Canada H3C 3J7.
authors.forename: Tri
authors.initials: T
authors.lastname: Vuong
authors.forename: Chantal
authors.initials: C
authors.lastname: Matar
authors.forename: Charles
authors.initials: C
authors.lastname: Ramassamy
authors.forename: Pierre S
authors.initials: PS
authors.lastname: Haddad
mesh_terms: D000818:Animals; D000975:Antioxidants / Q000378:metabolism / Q000494:pharmacology*; D001711:Biotransformation; D029798:Blueberry Plants / Q000378:metabolism / Q000382:microbiology; D002374:Catalase / Q000378:metabolism; D016923:Cell Death / Q000187:drug effects; D045744:Cell Line, Tumor; D004305:Dose-Response Relationship, Drug; D005285:Fermentation; D006861:Hydrogen Peroxide; D051379:Mice; D020928:Mitogen-Activated Protein Kinases / Q000378:metabolism*; D009474:Neurons / Q000187:drug effects*; D018696:Neuroprotective Agents / Q000494:pharmacology; D018384:Oxidative Stress / Q000187:drug effects*; D028321:Plant Preparations / Q000378:metabolism / Q000494:pharmacology*; D012705:Serratia / Q000378:metabolism*; D015398:Signal Transduction / Q000187:drug effects; D013482:Superoxide Dismutase / Q000378:metabolism; D015854:Up-Regulation
chemical_list: D000975:Antioxidants; D018696:Neuroprotective Agents; D028321:Plant Preparations; D006861:Hydrogen Peroxide; D002374:Catalase; D013482:Superoxide Dismutase; D020928:Mitogen-Activated Protein Kinases