Abstract
Ribosomal protein S3 (rpS3), a multi-functional protein, has been known to participate in DNA repair mechanism. In this study, we investigated changes in rpS3 immunoreactivity and its protein levels in the sub-regions of the gerbil hippocampus following subacute and chronic restraint stress. Serum corticosterone levels were increased in both the subacute and chronic-stress-groups compared to the control-group: the level in the subacute-stress-group was much higher than that in the chronic-stress-group. We could not find any neuronal damage in all the sub-regions of the hippocampus after both the subacute and chronic restraint stress. In the subacute-stress-group, rps3 immunoreactivity was not different compared to the control-group. However, rps3 immunoreactivity in the chronic-stress-group was decreased compared to the subacute-stress-group: especially, the immunoreactivity was markedly decreased in the pyramidal cells of the hippocampus proper (CA1–CA3 region) and granule cells of the dentate gyrus. In addition, western blot analysis also showed that rpS3 protein levels in the chronic-stress-group were significantly decreased compared to those in the subacute-stress-group. These findings indicate that chronic stress, not subacute stress, can decrease rpS3 immunoreactivity.
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Acknowledgments
The authors would like to thank Mr. Seung Uk Lee for their technical help in this study. This work was supported by 2011 Research Grant from Kangwon National University, and by Mid-career Researcher Program from the NRF Grant funded by the MEST (2009-0086319).
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Joon Ha Park and Choong Hyun Lee contributed equally to this article.
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Park, J.H., Lee, C.H., Yan, B.C. et al. Changes in Ribosomal Protein S3 Immunoreactivity and its Protein Levels in the Gerbil Hippocampus Following Subacute and Chronic Restraint Stress. Neurochem Res 37, 1428–1435 (2012). https://doi.org/10.1007/s11064-012-0727-z
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DOI: https://doi.org/10.1007/s11064-012-0727-z