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Biochim Biophys Acta. 2008 Sep;1786(1):24-31. doi: 10.1016/j.bbcan.2008.04.001. Epub 2008 Apr 22.

Preventing aneuploidy: the contribution of mitotic checkpoint proteins.

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  • 1Department of Physiological Chemistry, UMC Utrecht, Universiteitsweg 100, 3584 CG Utrecht, The Netherlands.


Aneuploidy, an abnormal number of chromosomes, is a trait shared by most solid tumors. Chromosomal instability (CIN) manifested as aneuploidy might promote tumorigenesis and cause increased resistance to anti-cancer therapies. The mitotic checkpoint or spindle assembly checkpoint is a major signaling pathway involved in the prevention of CIN. We review current knowledge on the contribution of misregulation of mitotic checkpoint proteins to tumor formation and will address to what extent this contribution is due to chromosome segregation errors directly. We propose that both checkpoint and non-checkpoint functions of these proteins contribute to the wide array of oncogenic phenotypes seen upon their misregulation.

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