Abstract:
:Following genotoxic insult, p53 mutated tumour cells undergo mitotic catastrophe. This is characterised by a switch from mitosis to the endocycle. The essential difference between mitosis and the endocycle is that in the latter, DNA synthesis is uncoupled from cell division, which leads to the formation of endopolyploid cells. Recent data suggests that a return from the endocycle into mitosis is also possible. Furthermore, our observations indicate that a particular type of endocycle known as endomitosis may be involved in this return. Here we review the role of endomitosis in the somatic reduction of polyploidy during development and its postulated role in the evolution of meiosis. Finally, we incorporate these evolutionary data to help interpret our most recent observations in the tumour cell system, which indicate a role for endomitosis and meiotic regulators, in particular p39mos in the segregation of genomes (somatic reduction) of these endopolyploid cells.
journal_name
Cell Biol Intjournal_title
Cell biology internationalauthors
Erenpreisa J,Kalejs M,Cragg MSdoi
10.1016/j.cellbi.2005.10.005keywords:
subject
Has Abstractpub_date
2005-12-01 00:00:00pages
1012-8issue
12eissn
1065-6995issn
1095-8355pii
S1065-6995(05)00239-8journal_volume
29pub_type
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