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Advances in Brief |
The Hormel Institute, University of Minnesota, Austin, Minnesota 55912
c-Jun NH2-terminal kinase (JNK) 1 and JNK2 have been assumed to complement each other and mediate the same or similar biological functions. However, our recent reports indicated that 7,12-dimethylbenz(a)anthracene/12-O-tetradecanoylphorbol-13-acetate-induced tumor development is suppressed in Jnk2 knockout mice but enhanced in Jnk1 knockout mice. In the present work, primary embryo cells were isolated from wild-type, Jnk1-/- and Jnk2-/- mice and used for cDNA microarray analysis. The patterns of gene expression in Jnk1-/-, Jnk2-/-, and wild-type cells are different. After 12-O-tetradecanoylphorbol-13-acetate treatment, the changes in the gene expression profiles in three different kinds of cells appear to agree with the differences in susceptibility to tumorigenesis of each respective animal model. These results suggest that JNK1 and JNK2 proteins have different roles in modulating cell function.
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