title: Protective effect of magnolol against hydrogen peroxide-induced oxidative stress in human lens epithelial cells.
abstract: Oxidative stress plays a significant role in the progression of cataract. We aimed to investigate the protective effect of magnolol, a compound extracted from the Chinese herb Magnolia officinalis, against oxidative stress in human lens epithelial (HLE) cells as well as the possible molecular mechanism involved. In this study, magnolol was observed to protect against H2O2-induced cytotoxicity in HLE B-3 cells. Magnolol inhibited the generation of reactive oxygen species (ROS), loss of mitochondrial membrane potential (Delta psi m) and release of cytochrome c from mitochondria caused by H2O2 into cytosol in HLE B-3 cells. Magnolol also inhibited H2O2-induced expressions of caspase-9 and caspase-3 and reduction of Bcl-2/Bax ratio. Moreover, magnolol attenuated the deactivation of ERK/MAPK (extracellular signal-regulated kinase/mitogen activated protein kinase) and the enhanced activation of p38, JNK (c-Jun N-terminal kinase) induced by H2O2. Magnolol could be useful in protecting against oxidative stress in HLE cells, suggesting a potential protective effect against cataractogenesis effect against cataractogenesis.
authors: Eye Center, Affiliated Second Hospital, College of Medicine, Zhejiang University, Hangzhou, China. xlren@zju.edu.cn
authors: Ke
authors: K
authors: Yao
authors: Li
authors: L
authors: Zhang
authors: Pan-Pan
authors: PP
authors: Ye
authors: Xia-Jing
authors: XJ
authors: Tang
authors: Yi-Dong
authors: YD
authors: Zhang
mesh_terms: D001713:Biphenyl Compounds / Q000494:pharmacology*; D015153:Blotting, Western; D053148:Caspase 3 / Q000378:metabolism; D053453:Caspase 9 / Q000378:metabolism; D002460:Cell Line; D002470:Cell Survival / Q000187:drug effects; D045304:Cytochromes c / Q000378:metabolism; D004305:Dose-Response Relationship, Drug; D004789:Enzyme Activation / Q000187:drug effects; D004847:Epithelial Cells / Q000166:cytology / Q000187:drug effects* / Q000378:metabolism; D005434:Flow Cytometry; D006801:Humans; D006861:Hydrogen Peroxide / Q000494:pharmacology*; D007908:Lens, Crystalline / Q000166:cytology; D017705:Lignans / Q000494:pharmacology*; D020935:MAP Kinase Signaling System / Q000187:drug effects; D031566:Magnolia / Q000737:chemistry; D053078:Membrane Potential, Mitochondrial / Q000187:drug effects; D016877:Oxidants / Q000494:pharmacology; D018384:Oxidative Stress / Q000187:drug effects*; D020011:Protective Agents / Q000494:pharmacology; D019253:Proto-Oncogene Proteins c-bcl-2 / Q000378:metabolism; D017382:Reactive Oxygen Species / Q000378:metabolism; D051028:bcl-2-Associated X Protein / Q000378:metabolism
chemical_list: C494826:BAX protein, human; D001713:Biphenyl Compounds; D017705:Lignans; D016877:Oxidants; D020011:Protective Agents; D019253:Proto-Oncogene Proteins c-bcl-2; D017382:Reactive Oxygen Species; D051028:bcl-2-Associated X Protein; C005498:magnolol; D045304:Cytochromes c; D006861:Hydrogen Peroxide; D053148:Caspase 3; D053453:Caspase 9