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  • Title: Stress kinase MKK7: savior of cell cycle arrest and cellular senescence.
    Author: Wada T, Penninger JM.
    Journal: Cell Cycle; 2004 May; 3(5):577-9. PubMed ID: 15107616.
    Abstract:
    The c-Jun N-terminal kinase (JNK/SAPK) signaling cascade controls a spectrum of cellular processes, including cell growth, differentiation, transformation, and apoptosis. We recently demonstrated that stress kinase MKK7, a direct activator of JNKs, couples stress signaling to G2/M cell cycle progression, CDC2 expression, and cellular senescence. We further explored other molecules involved in JNK pathway and found that both MKK4, another direct activator of JNK, and c-Jun, a direct substrate of JNK, have similar roles to MKK7. Here we discuss the importance of the MKK4/MKK7-JNK-c-Jun pathway linking stress and developmental signals to cell proliferation, cell cycle progression, cellular senescence, and apoptosis including recent unpublished data from our lab.
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