Dosage of Dyrk1a shifts cells within a p21-cyclin D1 signaling map to control the decision to enter the cell cycle.
Dosage of Dyrk1a shifts cells within a p21-cyclin D1 signaling map to control the decision to enter the cell cycle.
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DOI:
10.1016/j.molcel.2013.09.009
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发表时间:
2013-10-10
期刊:
影响因子:
16
通讯作者:
Meyer, Tobias
中科院分区:
文献类型:
--
作者:
Chen, Jia-Yun;Lin, Jia-Ren;Tsai, Feng-Chiao;Meyer, Tobias
Mammalian cells have a remarkable capacity to compensate for heterozygous gene loss or extra gene copies. One exception is Down syndrome (DS) where a third copy of chromosome 21 mediates neurogenesis defects and lowers the frequency of solid tumors. Here we combine live-cell imaging and single-cell analysis to show that increased dosage of chromosome 21-localized Dyrk1a steeply increases G1 cell cycle duration through direct phosphorylation and degradation of cyclin D1 (CycD1). DS-derived fibroblasts showed analogous cell cycle changes that were reversed by Dyrk1a inhibition. Furthermore, reducing Dyrk1a activity increased CycD1 expression to force a bifurcation, with one subpopulation of cells accelerating proliferation and the other arresting proliferation by co-stabilizing CycD1 and the CDK inhibitor p21. Thus, dosage of Dyrk1a repositions cells within a p21-CycD1 signaling map, directing each cell to either proliferate or to follow two distinct cell cycle exit pathways characterized by high or low CycD1 and p21 levels.
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影响因子:
3.5
作者:
Altafaj, X;Dierssen, M;Estivill, X
通讯作者:
Estivill, X
DOI:
10.4161/cc.21404
发表时间:
2012-09-15
期刊:
Cell cycle (Georgetown, Tex.)
影响因子:
--
作者:
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Rollins, BJ
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64.5
作者:
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通讯作者:
Miyawaki, Atsushi