Journal of Capital Medical University ›› 2013, Vol. 34 ›› Issue (5): 698-703.doi: 10.3969/j.issn.1006-7795.2013.05.013

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Protein kinase Cγ play roles in hypoxic preconditioning-induced neuroprotection and determination of its interacting proteins in penumbra of mice with ischemic stroke

HAN Song, ZHANG Nan, YIN Yanling, ZHAO Li, LUO Yanlin, LI Junfa   

  1. Department of Neurobiology, School of Basic medical science, Beijing Institute for Brain Disorders, Capital Medical University, Beijing 1000069, China
  • Received:2013-07-16 Online:2013-10-21 Published:2013-10-22
  • Supported by:

    This study was supported by National Natural Science Foundation of China (81273071,30901196);Excellent Person Project of Beijing (2011D005018000011).

Abstract:

Objective To validate the role of conventional protein kinase C (cPKC)γ in hypoxic precondition (HPC)- induced neuroprotection against brain ischemic injury, and determine cPKCγ -specific signaling proteins in penumbra of mice following ischemic stroke by using cPKCγ inhibitor and HPC mouse model.Methods Healthy adult male BALB/c mice were randomly divided into five groups, including normoxic sham, normoxic ischemia (I), ischemia following DMSO treatment (DMSO+I), ischemia post HPC (HPC+I), and ischemia after cPKCγ inhibitor Go6983 and HPC pretreatments. Using HPC and middle cerebral artery occlusion (MCAO)-induced ischemic stroke mouse models, the cPKCγ membrane translocation (activation) levels, cerebral infraction volum and cPKCγ -interacting proteins in ischemic penumbra were determined by Western blot, TTC staining, cPKCγ immunoprecipitation, two-dimensional electrophoresis (2-DE) and mass spectrometry (MS), respectively. Results Compared with MCAO-induced ischemia (I) group, cPKCγ membrane translocation (activation) levels was increased significantly in ischemic core and penumbra of HPC+I group, but cPKCγ inhibitor Go6983 pretreatment could inhibit the increases of cPKCγ membrane translocation in ischemic core, penumbra and contralateral cortex of HPC+Go6983+I mice (P<0.05, n=6 per group). cPKCγ inhibitor Go6983 abolished HPC-induced reduction in infarction size of mice with ischemic stroke (P<0.05, n=6 per group). In addition, Go6983 could inhibit the interaction between cPKCγ and partial interacting proteins in ischemic penumbra of HPC+I mice, including superoxide dismutase [Cu-Zn], DJ-1, UMP-CMP kinase, adenylate kinase isoenzyme 1, ubiquitin carboxyl-terminal hydrolase isozyme L1 (UCHL1), interleukin-16 and heat shock protein 70 (HSP70). Conclusion cPKCγ participates HPC-induced neuroprotection though regulating its interaction with partial interacting proteins in ischemic penumbra of mice following ischemic stroke.

Key words: hypoxic preconditioning, ischemic stroke, protein kinase C, neuroprotection, proteomics

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