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Erythropoietin Upregulates Brain Hemoglobin Expression and Supports Neuronal Mitochondrial Activity

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Abstract

Multiple sclerosis (MS) is a neuro-inflammatory and demyelinating disease. Downregulation of neuronal mitochondrial gene expression and activity have been reported in several studies of MS. We have previously shown that hemoglobin-β (Hbb) signals to the nucleus of neurons and upregulates H3K4me3, a histone mark involved in regulating cellular metabolism and differentiation. The present study was undertaken to evaluate the effect of erythropoietin (EPO) on the upregulation of hemoglobin and mitochondrial-associated neuroprotection. We found that administering EPO (5000 IU/kg intraperitoneally) to mice upregulated brain Hbb expression, levels of H3K4me3, expression of mitochondrial complex III, complex V, and mitochondrial respiration. We also found that the neuronal mitochondrial metabolite N-acetylaspartate (NAA), a marker of neuronal mitochondrial activity, was increased with EPO treatment. Further, we measured the effects of EPO on preventing mitochondrial deficits in the cuprizone toxic demyelinating mouse model of MS. We found that EPO prevented cuprizone-mediated decreases in Hbb, complex III, and NAA. Our data suggest that EPO mediated regulation of Hbb supports neuronal energetics and may provide neuroprotection in MS and other neurodegenerative diseases where a dysfunction of mitochondria contributes to disease.

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Acknowledgements

This research was funded by the College of Arts and Sciences at Kent State University.

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Authors and Affiliations

  1. Department of Biological Sciences and School of Biomedical Sciences, Kent State University, Kent, OH, 44242, USA

    N. K. Singhal, K. Alkhayer, J. Shelestak, R. Clements, E. Freeman & J. McDonough

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  1. N. K. Singhal
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  2. K. Alkhayer
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  3. J. Shelestak
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  4. R. Clements
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Correspondence to N. K. Singhal or J. McDonough.

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Singhal, N.K., Alkhayer, K., Shelestak, J. et al. Erythropoietin Upregulates Brain Hemoglobin Expression and Supports Neuronal Mitochondrial Activity. Mol Neurobiol 55, 8051–8058 (2018). https://doi.org/10.1007/s12035-018-0971-6

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  • DOI: https://doi.org/10.1007/s12035-018-0971-6

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