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Nature Cell Biology 7, 126–136 (1 February 2005) | doi:10.1038/ncb1217

FoxM1 is required for execution of the mitotic programme and chromosome stability

Jamila Laoukili , Matthijs R. H. Kooistra , Alexandra Br|[aacute]|s , Jos Kauw , Ron M. Kerkhoven , Ashby Morrison , Hans Clevers & Ren|[eacute]| H. Medema

Transcriptional induction of cell-cycle regulatory proteins ensures proper timing of subsequent cell-cycle events. Here we show that the Forkhead transcription factor FoxM1 regulates expression of many G2-specific genes and is essential for chromosome stability. Loss of FoxM1 leads to pleiotropic cell-cycle defects, including a delay in G2, chromosome mis-segregation and frequent failure of cytokinesis. We show that transcriptional activation of cyclin B by FoxM1 is essential for timely mitotic entry, whereas CENP-F, another direct target of FoxM1 identified here, is essential for precise functioning of the mitotic spindle checkpoint. Thus, our data uncover a transcriptional cluster regulated by FoxM1 that is essential for proper mitotic progression.