Identification of protein kinase C isoforms involved in cerebral hypoxic preconditioning of mice.

Brain Res

Institute for Biomedical Science of Pain, Beijing Key Laboratory for Neural Regeneration and Repairing, Department of Neurobiology, Capital University of Medical Sciences, Beijing 100054, China.

Published: October 2005

Recently, accumulated studies have suggested that protein kinases C (PKC) play a central role in the development of ischemic-hypoxic preconditioning (I/HPC) in the brain. However, which types of PKC isoforms might be responsible for neuroprotection is still not clear, especially when the systematic investigation of PKC isoform-specific changes in brain regions was rare in animals with ischemic-hypoxic preconditioning. By using Western blot, we have demonstrated that the levels of cPKC betaII and gamma membrane translocation were increased in the early phase of cerebral hypoxic preconditioning. In this study, we combined the Western blot and immunostaining methods to investigate the effects of repetitive hypoxic exposure (H1-H4, n = 6 for each group) on membrane translocation and protein expression of several types of PKC isoforms, both in the cortex and hippocampus of mice. We found that the increased membrane translocation of nPKCepsilon (P < 0.05, versus normoxic H0) but not its protein expression levels in both the cortex and hippocampus during development of cerebral HPC in mice. However, there were no significant changes in both membrane translocation and protein expression levels of nPKCdelta, theta, eta, mu, and aPKC iota/lambda, zeta in these brain areas after hypoxic preconditioning. Similarly, an extensive subcellular redistribution of cPKCbetaII, gamma, and nPKCepsilon was observed by immunostaining in the cortex after three series of hypoxic exposures (H3). These results indicate that activation of cPKCbetaII, gamma, and nPKCepsilon might be involved in the development of cerebral hypoxic preconditioning of mice.

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.brainres.2005.08.047DOI Listing

Publication Analysis

Top Keywords

hypoxic preconditioning
16
membrane translocation
16
cerebral hypoxic
12
protein expression
12
preconditioning mice
8
ischemic-hypoxic preconditioning
8
types pkc
8
pkc isoforms
8
western blot
8
translocation protein
8

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!