Celastrol prevents cadmium‐induced neuronal cell death by blocking reactive oxygen species‐mediated mammalian target of rapamycin pathway

  • Ruijie Zhang
    Jiangsu Key Laboratory for Molecular and Medical Biotechnology, Jiangsu Key Laboratory for Microbes and Functional Genomics, College of Life Sciences Nanjing Normal University Nanjing China
  • Nana Zhang
    Jiangsu Key Laboratory for Molecular and Medical Biotechnology, Jiangsu Key Laboratory for Microbes and Functional Genomics, College of Life Sciences Nanjing Normal University Nanjing China
  • Hai Zhang
    Jiangsu Key Laboratory for Molecular and Medical Biotechnology, Jiangsu Key Laboratory for Microbes and Functional Genomics, College of Life Sciences Nanjing Normal University Nanjing China
  • Chunxiao Liu
    Jiangsu Key Laboratory for Molecular and Medical Biotechnology, Jiangsu Key Laboratory for Microbes and Functional Genomics, College of Life Sciences Nanjing Normal University Nanjing China
  • Xiaoqing Dong
    Jiangsu Key Laboratory for Molecular and Medical Biotechnology, Jiangsu Key Laboratory for Microbes and Functional Genomics, College of Life Sciences Nanjing Normal University Nanjing China
  • Xiaoxue Wang
    Jiangsu Key Laboratory for Molecular and Medical Biotechnology, Jiangsu Key Laboratory for Microbes and Functional Genomics, College of Life Sciences Nanjing Normal University Nanjing China
  • Yu Zhu
    Jiangsu Key Laboratory for Molecular and Medical Biotechnology, Jiangsu Key Laboratory for Microbes and Functional Genomics, College of Life Sciences Nanjing Normal University Nanjing China
  • Chong Xu
    Jiangsu Key Laboratory for Molecular and Medical Biotechnology, Jiangsu Key Laboratory for Microbes and Functional Genomics, College of Life Sciences Nanjing Normal University Nanjing China
  • Lei Liu
    Department of Biochemistry and Molecular Biology Louisiana State University Health Sciences Center Shreveport LA USA
  • Sijun Yang
    ABSL‐III Laboratory for Animal Experiment Center, State Key Laboratory of Virology Wuhan University School of Medicine Wuhan China
  • Shile Huang
    Department of Biochemistry and Molecular Biology Louisiana State University Health Sciences Center Shreveport LA USA
  • Long Chen
    Jiangsu Key Laboratory for Molecular and Medical Biotechnology, Jiangsu Key Laboratory for Microbes and Functional Genomics, College of Life Sciences Nanjing Normal University Nanjing China

抄録

<jats:sec><jats:title>Background and Purpose</jats:title><jats:p>Increasing evidence has suggested cadmium (Cd), as an inducer of ROS, is a potential pathogenic factor in human neurodegenerative diseases. Thus, it is important to find effective interventions for Cd‐induced oxidative stress in the CNS. Here, we have studied the effects of celastrol, a plant‐derived triterpene, on ROS production and cell death in neuronal cells, induced by Cd.</jats:p></jats:sec><jats:sec><jats:title>Experimental Approach</jats:title><jats:p>PC12, SH‐SY5Y cells and primary murine neurons were used to study celastrol neuroprotection against Cd‐poisoning. Cd‐induced changes in cell viability, apoptosis, ROS and AMP‐activated protein kinase (AMPK)/mammalian target of rapamycin (mTOR) pathway in the cells were analysed by Trypan blue exclusion, DAPI and TUNEL staining, ROS imaging, immunofluorescence staining and Western blotting. Pharmacological and genetic approaches were employed to investigate the mechanisms underlying Cd neurotoxicity.</jats:p></jats:sec><jats:sec><jats:title>Results</jats:title><jats:p>Celastrol attenuated Cd‐induced apoptosis by suppressing Cd activation of mTOR, which was attributed to preventing Cd inactivation of AMPK. Inhibition of AMPK with compound C or expression of dominant negative AMPKα prevented celastrol from hindering Cd‐induced dephosphorylation of AMPKα, activation of mTOR and apoptosis. Inhibition of mTOR with rapamycin or knockdown of mTOR potentiated prevention by celastrol, of Cd‐induced phosphorylation of p70 S6 kinase 1/eukaryotic initiation factor 4E binding protein 1 and apoptosis. Celastrol attenuated Cd‐induced cell death by suppressing induction of mitochondrial ROS.</jats:p></jats:sec><jats:sec><jats:title>Conclusions and Implications</jats:title><jats:p>Celastrol prevented the inactivation of AMPK by mitochondrial ROS, thus attenuating Cd‐induced mTOR activation and neuronal apoptosis. Celastrol may be a promising agent for prevention of Cd‐induced oxidative stress and neurodegenerative diseases.</jats:p></jats:sec>

収録刊行物

被引用文献 (2)*注記

もっと見る

問題の指摘

ページトップへ