Iron-induced energy supply deficiency and mitochondrial fragmentation in neurons
文献类型：期刊论文
| 作者 | Huang, Xiao Tian; Liu, Xing; Ye, Chun Yan; Tao, Ling Xue; Zhou, Hu ; Zhang, Hai Yan
|
| 刊名 | Journal of neurochemistry
 |
| 出版日期 | 2018-12 |
| 卷号 | 147期号:6页码:816-830 |
| ISSN号 | 1471-4159 |
| DOI | 10.1111/jnc.14621 |
| 文献子类 | Article |
| 英文摘要 | Iron dyshomeostasis and mitochondrial impairments are both vitally important for the progression of many neurodegenerative diseases, including Parkinson's disease and Alzheimer's disease. Nevertheless, how these two pathological phenomena are linked with one another remains unclear, especially in neurons. To address the question, a model of iron overload was established with exposure of rat primary cortical neurons to excessive iron. We first verified that iron overload resulted in a decrease in adenosine triphosphate (ATP) production in neurons. Meanwhile, the release of mitochondrial cytochrome c was significantly increased after iron overload and consequently triggered an apoptosis signal, as revealed by Caspase 3 cleavage. To explore the potential underlying molecular mechanisms, an unlabeled quantitative proteomics approach was applied to primary neurons. Gene Ontology enrichment analysis revealed that 58 mitochondria-associated proteins were significantly altered, including three subunits of mitochondrial complex I and optic atrophy 1(OPA1). Increased NADH-ubiquinone oxidoreductase 75 kDa subunit and decreased NADH-ubiquinone oxidoreductase subunit A10 levels were further validated by a western blot, and more importantly, complex I activity markedly declined. Iron-induced down-regulation on the OPA1 level was also validated by a western blot, which was not reversed by the anti-oxidant but was reversed by the iron chelator. Moreover, an OPA1-associated key downstream effect, mitochondrial fragmentation, was found to be aggravated in neurons exposed to excessive iron, which is consistent with the down-regulation of OPA1. Furthermore, the protein level of PTEN-induced putative kinase 1, an important protein closely related to complex I activity and mitochondrial fragmentation, also significantly declined in neurons by iron overload. Thus, our findings may shed new light on the linkage between iron toxicity and mitochondrial impairments, such as energy supply deficiency and mitochondrial fragmentation, and further expand the toxic repertoire of iron in the central nerve system. Cover Image for this issue: doi: 10.1111/jnc.14205. |
| 语种 | 英语 |
| 源URL | [http://119.78.100.183/handle/2S10ELR8/266784]  |
| 专题 | 药理学第二研究室 |
| 作者单位 | CAS Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, People's Republic of China |
| 推荐引用方式 GB/T 7714 | Huang, Xiao Tian,Liu, Xing,Ye, Chun Yan,et al. Iron-induced energy supply deficiency and mitochondrial fragmentation in neurons[J]. Journal of neurochemistry,2018,147(6):816-830. |
| APA | Huang, Xiao Tian,Liu, Xing,Ye, Chun Yan,Tao, Ling Xue,Zhou, Hu,&Zhang, Hai Yan.(2018).Iron-induced energy supply deficiency and mitochondrial fragmentation in neurons.Journal of neurochemistry,147(6),816-830. |
| MLA | Huang, Xiao Tian,et al."Iron-induced energy supply deficiency and mitochondrial fragmentation in neurons".Journal of neurochemistry 147.6(2018):816-830. |
入库方式： OAI收割
来源：上海药物研究所
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