Abstract
The mitogen-activated protein kinase (MAPK) cascade is required for mitogenesis in somatic mammalian cells and is activated by a wide variety of oncogenic stimuli. Specific roles for this signaling module in growth were dissected by inhibiting MAPK kinase 1 (MAPKK1) activity in highly synchronized NIH 3T3 cells. In addition to the known role of this kinase in cell-cycle entry from G 0 , the level of MAPKK activity was observed to affect the kinetics of progression through both the G 1 and G 2 phases of the cell cycle in NIH 3T3 cells. Ectopic expression of dominant-negative forms of MAPKK1, which was previously shown to inhibit G 0 /G 1 progression, was found to also delay progression of cells through G 2 . In addition, treatment of cells with the specific MAPKK inhibitor PD 98059 during a synchronous S phase arrested the cells in the following G 2 phase. These data demonstrate a novel role for the MAPK cascade in progression from G 2 into mitosis in NIH 3T3 cells.
Bibliography
Wright, J. H., Munar, E., Jameson, D. R., Andreassen, P. R., Margolis, R. L., Seger, R., & Krebs, E. G. (1999). Mitogen-activated protein kinase kinase activity is required for the G 2 /M transition of the cell cycle in mammalian fibroblasts. Proceedings of the National Academy of Sciences, 96(20), 11335â11340.
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Dates
Type | When |
---|---|
Created | 23 years, 1 month ago (July 26, 2002, 10:38 a.m.) |
Deposited | 3 years, 4 months ago (April 13, 2022, 3:45 p.m.) |
Indexed | 1 month ago (July 30, 2025, 10:52 a.m.) |
Issued | 25 years, 11 months ago (Sept. 28, 1999) |
Published | 25 years, 11 months ago (Sept. 28, 1999) |
Published Online | 25 years, 11 months ago (Sept. 28, 1999) |
Published Print | 25 years, 11 months ago (Sept. 28, 1999) |
@article{Wright_1999, title={Mitogen-activated protein kinase kinase activity is required for the G 2 /M transition of the cell cycle in mammalian fibroblasts}, volume={96}, ISSN={1091-6490}, url={http://dx.doi.org/10.1073/pnas.96.20.11335}, DOI={10.1073/pnas.96.20.11335}, number={20}, journal={Proceedings of the National Academy of Sciences}, publisher={Proceedings of the National Academy of Sciences}, author={Wright, Jocelyn H. and Munar, Erlynda and Jameson, Damon R. and Andreassen, Paul R. and Margolis, Robert L. and Seger, Rony and Krebs, Edwin G.}, year={1999}, month=sep, pages={11335–11340} }