title: Cytoprotective effect of polypeptide from Chlamys farreri on neuroblastoma (SH-SY5Y) cells following HO exposure involves scavenging ROS and inhibition JNK phosphorylation.
abstract: Oxidative stress has long been linked to cell death in many neurodegenerative conditions. Treatment with antioxidants is a promising approach for slowing disease progression. In this study, we used the neuroblastoma SH-SY5Y cells as an in vitro model to first assess the effect of polypeptide from Chlamys farreri (PCF), a natural marine antioxidant, on H(2)O(2)-induced neuronal cell death. Pre-treatment of SH-SY5Y cells with PCF inhibited H(2)O(2)-induced cell death in a concentration-dependent manner. In parallel, intracellular reactive oxygen species generation and lipid peroxidation were inhibited by PCF. Under severe H(2)O(2) insult, PCF promoted endogenous antioxidant defense components including glutathione peroxidase, catalase, superoxide dismutase, and glutathione. PCF also protected DNA from oxidative damage and enhanced the removal of 8-oxo-7,8-dihydro-2'-deoxyguanosine from DNA. Further, we found that PCF potentially prevented H(2)O(2)-induced cell apoptosis. When investigated mitogen-activated protein kinase signaling pathway, we found that pre-treatment of cells with PCF significantly blocked H(2)O(2)-induced phosphorylation of c-Jun N-terminal kinase of the mitogen-activated protein kinase family. However, PCF had little inhibitory effect on the H(2)O(2)-induced activation of extracellular signal-regulated kinase. Taken together, these data demonstrate that PCF prevents oxidative stress-induced reactive oxygen species production and c-Jun N-terminal kinase activation and may be useful in the treatment of neurodegenerative diseases.
authors.affiliation: Department of Molecular Biology, School of Medicine and Pharmacy, Ocean University of China, Qingdao, China. yejunli126@126.com
authors.forename: Junli
authors.initials: J
authors.lastname: Ye
authors.forename: Yantao
authors.initials: Y
authors.lastname: Han
authors.forename: Chunbo
authors.initials: C
authors.lastname: Wang
authors.forename: Wengong
authors.initials: W
authors.lastname: Yu
mesh_terms: D000080242:8-Hydroxy-2'-Deoxyguanosine; D000818:Animals; D000975:Antioxidants / Q000494:pharmacology; D017209:Apoptosis / Q000187:drug effects / Q000502:physiology; D045744:Cell Line, Tumor; D002540:Cerebral Cortex / Q000166:cytology; D019610:Cytoprotection; D003849:Deoxyguanosine / Q000031:analogs & derivatives / Q000378:metabolism; D048049:Extracellular Signal-Regulated MAP Kinases / Q000378:metabolism; D006801:Humans; D006861:Hydrogen Peroxide / Q000494:pharmacology; D048031:JNK Mitogen-Activated Protein Kinases / Q000378:metabolism*; D020935:MAP Kinase Signaling System / Q000187:drug effects / Q000502:physiology; D009447:Neuroblastoma; D009474:Neurons / Q000166:cytology / Q000187:drug effects* / Q000378:metabolism; D016877:Oxidants / Q000494:pharmacology; D018384:Oxidative Stress / Q000187:drug effects*; D049897:Pectinidae / Q000737:chemistry*; D010455:Peptides / Q000494:pharmacology*; D010766:Phosphorylation / Q000187:drug effects / Q000502:physiology; D051381:Rats; D017207:Rats, Sprague-Dawley; D017382:Reactive Oxygen Species / Q000378:metabolism
chemical_list: D000975:Antioxidants; D016877:Oxidants; D010455:Peptides; D017382:Reactive Oxygen Species; D000080242:8-Hydroxy-2'-Deoxyguanosine; D006861:Hydrogen Peroxide; D048049:Extracellular Signal-Regulated MAP Kinases; D048031:JNK Mitogen-Activated Protein Kinases; D003849:Deoxyguanosine