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Effects of Experimental Diabetes on C/EBP Proteins in Rat Hippocampus, Sciatic Nerve and Ganglia

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Abstract

Neurodegeneration is one of the most important complications of diabetes mellitus (DM). The exact mechanisms underlying neurodegeneration related to diabetic complications such as cognitive deficits and peripheral neuropathy are not clarified yet. Due to the fact that CCAAT/enhancer binding proteins (C/EBPs) have roles in cognitive functions, memory, synaptic plasticity, inflammation, lipid storage, and response to neurotrophic factors, it is possible to suggest that these transcription factors could have roles in neurodegeneration. Hence, in this study, the effects of experimental diabetes on C/EBPs in the hippocampus, sciatic nerve, and ganglia tissues were examined. After experimentally induced diabetes, immunoreactivity of related proteins was measured by western blotting. C/EBPα immunoreactivity in the hippocampus was not altered at 4-weeks but significantly decreased at 12-weeks of diabetes. C/EBPβ immunoreactivity was not altered at 4-weeks whereas significantly increased at 12-weeks of diabetes. In the ganglion, C/EBPα immunoreactivity was significantly decreased in diabetes, but C/EBPβ immunoreactivity was not affected. In the sciatic nerve, C/EBPα and β immunoreactivities were significantly decreased in diabetic rats. Furthermore, insulin therapy prevented diabetes-induced alterations in C/EBPα and β immunoreactivities. This study indicated, for the first time, that DM altered the immunoreactivity of C/EBPs in the nervous system. C/EBPs might be one of the important molecular targets which are responsible for neurodegeneration seen in diabetes.

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Acknowledgments

This study was supported by the Hacettepe University Scientific Research Foundation (Project No: 010D03301002).

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The authors declare that there are no conflicts of interest.

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Authors and Affiliations

  1. Department of Pharmacology, Faculty of Pharmacy, Hacettepe University, 06100, Sıhhiye, Ankara, Turkey

    Inci Kazkayasi, Nihan Burul-Bozkurt, Pelin Kelicen-Ugur & Can Pekiner

  2. Department of Pathology, Faculty of Medicine, Hacettepe University, Ankara, Turkey

    Sevgen Önder

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  1. Inci Kazkayasi
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  2. Nihan Burul-Bozkurt
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  3. Sevgen Önder
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  4. Pelin Kelicen-Ugur
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Correspondence to Inci Kazkayasi.

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Kazkayasi, I., Burul-Bozkurt, N., Önder, S. et al. Effects of Experimental Diabetes on C/EBP Proteins in Rat Hippocampus, Sciatic Nerve and Ganglia. Cell Mol Neurobiol 33, 559–567 (2013). https://doi.org/10.1007/s10571-013-9924-9

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