Program in Molecular Medicine
Biochemistry | Cell Biology | Cellular and Molecular Physiology | Molecular Biology
The c-Jun NH(2)-terminal kinase (JNK) is implicated in proliferation. Mice with a deficiency of either the Jnk1 or the Jnk2 genes are viable, but a compound deficiency of both Jnk1 and Jnk2 causes early embryonic lethality. Studies using conditional gene ablation and chemical genetic approaches demonstrate that the combined loss of JNK1 and JNK2 protein kinase function results in rapid senescence. To test whether this role of JNK was required for stem cell proliferation, we isolated embryonic stem (ES) cells from wild-type and JNK-deficient mice. We found that Jnk1(-/-) Jnk2(-/-) ES cells underwent self-renewal, but these cells proliferated more rapidly than wild-type ES cells and exhibited major defects in lineage-specific differentiation. Together, these data demonstrate that JNK is not required for proliferation or self-renewal of ES cells, but JNK plays a key role in the differentiation of ES cells.
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Citation: Mol Cell Biol. 2010 Mar;30(6):1329-40. doi: 10.1128/MCB.00795-09. Epub 2010 Jan 11. Link to article on publisher's site
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Xu, Ping and Davis, Roger J., "c-Jun NH2-terminal kinase is required for lineage-specific differentiation but not stem cell self-renewal" (2010). Davis Lab. 82.