Abstract
Protein kinase C (PKC) has been shown to regulate ethanol sensitivity. The goal of the present study was to ascertain whether chronic in vivo ethanol treatment could affect PKC isoforms in the mouse brain. We measured the protein level of membrane-bound PKC isoforms following chronic ethanol treatment using Western blotting. The protein level of membrane-bound PKCα and PKCγ isoforms, which are defined as Ca 2+-dependent PKC isoforms (cPKC), in the limbic forebrain during chronic ethanol treatment was significantly increased, whereas the levels of both were significantly decreased in the frontal cortex. By contrast, there was no change in PKCε, a Ca 2+-independent PKC isoform, in both areas. These findings suggest that the change in membrane-bound cPKC in the limbic forebrain and frontal cortex may play substantial roles for the development of ethanol dependence.
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