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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Alteration of protein kinase C isoform-specific expression during rat hepatocarcinogenesis after exposure to the peroxisome proliferator WY-14,643.

The role of protein kinase C (PKC) isoforms in mediating peroxisome proliferator chemical- (PPC) induced hepatocarcinogenesis was examined. After an acute gavage exposure to WY-14,643 (WY) membrane-bound PKCdelta and cytosolic PKCbeta decreased, whereas the expression of the other isoforms was not altered. After a 13-week chronic exposure, membrane-bound PKCbeta, delta and zeta levels decreased. In WY-induced hepatocellular adenomas, PKCalpha was increased, and PKCbeta was further decreased in membrane fractions. These results, taken together with previous studies, indicate that alterations in PKCalpha, beta and delta isoforms, which regulate mitogenesis, could play important roles in perpetuating the high cell proliferative rate in PPC-induced hepatocellular adenomas.[1]


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