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rhEPO Enhances Cellular Anti-oxidant Capacity to Protect Long-Term Cultured Aging Primary Nerve Cells

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Abstract

Erythropoietin (EPO) may protect the nervous system of animals against aging damage, making it a potential anti-aging drug for the nervous system. However, experimental evidence from natural aging nerve cell models is lacking, and the efficacy of EPO and underlying mechanism of this effect warrant further study. Thus, the present study used long-term cultured primary nerve cells to successfully mimic the natural aging process of nerve cells. Starting on the 11th day of culture, cells were treated with different concentrations of recombinant human erythropoietin (rhEPO). Using double immunofluorescence labeling, we found that rhEPO significantly improved the morphology of long-term cultured primary nerve cells and increased the total number of long-term cultured primary cells. However, rhEPO did not improve the ratio of nerve cells. A 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay was used to measure nerve cell activity and showed that rhEPO significantly improved the activity of long-term cultured primary nerve cells. Moreover, Annexin V-fluorescein isothiocyanate (FITC)/propidium iodide (PI) double immunofluorescence labeling flow cytometry revealed that rhEPO reduced the apoptotic rate of long-term cultured primary nerve cells. Senescence-associated β-galactosidase (SA-β-gal) immunohistochemistry staining showed that rhEPO significantly reduced the aging rate of long-term cultured primary nerve cells. Immunochemistry revealed that rhEPO enhanced intracellular superoxide dismutase (SOD) activity and glutathione (GSH) abundance and reduced the intracellular malondialdehyde (MDA) level. In addition, this effect depended on the dose, was maximized at a dose of 100 U/ml and was more pronounced than that of vitamin E. In summary, this study finds that rhEPO protects long-term cultured primary nerve cells from aging in a dose-dependent manner. The mechanism of this effect may be associated with the enhancement of the intracellular anti-oxidant capacity. These findings provide a theoretical basis to further the anti-aging mechanism of EPO in the nervous system, and they provide experimental evidence at the cellular level for the clinical application of EPO to protect the nervous system from aging.

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Acknowledgements

This research was supported by the National Natural Science Foundation of China (No. 81170330).

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Authors and Affiliations

  1. The Department of Biochemistry and Molecular Biology, Xi’an Jiaotong University Health Science Center, Xi’an, Shaanxi, 710061, China

    Huqing Wang & Xiaorui Yu

  2. The Department of Neurology, Xi’an Jiaotong University Second Affiliated Hospital, Xi’an, Shaanxi, 710004, China

    Huqing Wang, Jiaxin Fan, Mengyi Chen, Qingling Yao, Zhen Gao, Guilian Zhang & Haiqin Wu

  3. The Environment and Genes Related to Diseases Key Laboratory of Education Ministry, Xi’an Jiaotong University Health Science Center, Xi’an, Shaanxi, 710061, China

    Xiaorui Yu

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  1. Huqing Wang
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Wang, H., Fan, J., Chen, M. et al. rhEPO Enhances Cellular Anti-oxidant Capacity to Protect Long-Term Cultured Aging Primary Nerve Cells. J Mol Neurosci 62, 291–303 (2017). https://doi.org/10.1007/s12031-017-0937-6

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  • DOI: https://doi.org/10.1007/s12031-017-0937-6

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