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Molecular Neurobiology

, Volume 49, Issue 3, pp 1338–1349 | Cite as

The Roles of p38 MAPK/MSK1 Signaling Pathway in the Neuroprotection of Hypoxic Postconditioning Against Transient Global Cerebral Ischemia in Adult Rats

  • Pingping Zhu
  • Lixuan Zhan
  • Tingna Zhu
  • Donghai Liang
  • Jiaoyue Hu
  • Weiwen Sun
  • Qinghua Hou
  • Huarong Zhou
  • Baoxing Wu
  • Yanmei Wang
  • En XuEmail author
Article

Abstract

Postconditioning has regenerated interest as a mechanical intervention against cerebral ischemia/reperfusion injury, but its molecular mechanisms remain unknown. We previously reported that hypoxic postconditioning (HPC) ameliorated neuronal death induced by transient global cerebral ischemia (tGCI) in hippocampal CA1 subregion of adult rats. This study tested the hypothesis that p38-mitogen-activated protein kinase (p38 MAPK)/mitogen- and stress-response kinase 1 (MSK1) signaling pathway plays a role in the HPC-induced neuroprotection. Male Wistar rats were subjected to 10 min ischemia induced by applying the four-vessel occlusion method. HPC with 120 min was applied at 24 h after reperfusion. Immunohistochemistry and Western blot were used to detect the expression of phosphorylation of p38 MAPK and MSK1, as well as cleaved caspase-3. We found that HPC induced a significant increase of phosphorylated p38 MAPK and MSK1 in neurons of hippocampal CA1 region and a significant decrease in glial cells after tGCI as well. Furthermore, HPC attenuated caspase-3 cleavation triggered by tGCI in CA1 region. Moreover, p38 MAPK inhibition by SB203580 significantly decreased the phosphorylation of MSK1, increased cleaved caspase-3 expression, and abolished the neuroprotection of HPC. These findings suggested that p38 MAPK/MSK1 signaling axis contributed to HPC-mediated neuroprotection against tGCI, at least in part, by regulating the activation of caspase-3.

Keywords

Cerebral ischemia Hypoxic postconditioning Neuroprotection Cleaved caspase-3 p38 MAPK/MSK1 signaling pathway 

Notes

Acknowledgments

This work was supported by the National Natural Science Foundation of China (Grant No. 81371303 and 81100880) and National Research Foundation for the Doctoral Program of Higher Education of China (Grant No. 20124423110002). Our sincere thanks go to Peifeng DU (Institute for Standardization of Nuclear Industry) for editing this paper.

Conflict of Interest

None.

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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  • Pingping Zhu
    • 1
  • Lixuan Zhan
    • 1
  • Tingna Zhu
    • 1
  • Donghai Liang
    • 2
  • Jiaoyue Hu
    • 1
  • Weiwen Sun
    • 1
  • Qinghua Hou
    • 1
  • Huarong Zhou
    • 1
  • Baoxing Wu
    • 1
  • Yanmei Wang
    • 1
  • En Xu
    • 1
    Email author
  1. 1.Institute of Neurosciences and the Second Affiliated Hospital of Guangzhou Medical University; Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of ChinaGuangzhouPeople’s Republic of China
  2. 2.Yale School of Public Health, Yale UniversityNew HavenUSA

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