title: Cdc20 control of cell fate during prolonged mitotic arrest: do Cdc20 protein levels affect cell fate in response to antimitotic compounds?
abstract: The fate of cells arrested in mitosis by antimitotic compounds is complex but is influenced by competition between pathways promoting cell death and pathways promoting mitotic exit. As components of both of these pathways are regulated by Cdc20-dependent degradation, I hypothesize that variations in Cdc20 protein levels, rather than mutations in checkpoint genes, could affect cell fate during prolonged mitotic arrest. This hypothesis is supported by experiments where manipulation of Cdc20 levels affects the response to antimitotic compounds. The observed differences in Cdc20 levels between cell lines likely reflects differences in the rate of synthesis or degradation of the protein; therefore, understanding these pathways at a molecular level could pave the way for modulating the activity of Cdc20, in turn presenting novel therapeutic possibilities.
authors: Faculty of Health Sciences, Novo Nordisk Foundation Centre for Protein Research, University of Copenhagen, Copenhagen, Denmark. jakob.nilsson@cpr.ku.dk
authors: Jakob
authors: J
authors: Nilsson
mesh_terms: D050256:Antimitotic Agents; D002135:Calcium-Binding Proteins / Q000378:metabolism*; D064199:Cdc20 Proteins; D018797:Cell Cycle Proteins / Q000378:metabolism*; D002460:Cell Line; D045744:Cell Line, Tumor; D006801:Humans; D059566:M Phase Cell Cycle Checkpoints; D064246:Mad2 Proteins; D008938:Mitosis; D009154:Mutation; D010766:Phosphorylation; D017346:Protein Serine-Threonine Kinases / Q000378:metabolism; D012097:Repressor Proteins / Q000378:metabolism*
chemical_list: D050256:Antimitotic Agents; D002135:Calcium-Binding Proteins; D064199:Cdc20 Proteins; D018797:Cell Cycle Proteins; C577697:MAD2L1 protein, human; D064246:Mad2 Proteins; D012097:Repressor Proteins; C577488:CDC20 protein, human; C090464:Bub1 spindle checkpoint protein; D017346:Protein Serine-Threonine Kinases