title: Decatenation checkpoint deficiency in stem and progenitor cells.
abstract: The decatenation checkpoint normally delays entry into mitosis until chromosomes have been disentangled through the action of topoisomerase II. We have found that the decatenation checkpoint is highly inefficient in mouse embryonic stem cells, mouse neural progenitor cells, and human CD34+ hematopoietic progenitor cells. Checkpoint efficiency increased when embryonic stem cells were induced to differentiate, which suggests that the deficiency is a feature of the undifferentiated state. Embryonic stem cells completed cell division in the presence of entangled chromosomes, which resulted in severe aneuploidy in the daughter cells. The decatenation checkpoint deficiency is likely to increase the rates of chromosome aberrations in progenitor cells, stem cells, and cancer stem cells.
authors.affiliation: Department of Genetics and Development, College of Physicians and Surgeons of Columbia University, New York, New York 10032, USA.
authors.forename: Marc
authors.initials: M
authors.lastname: Damelin
authors.forename: Yi E
authors.initials: YE
authors.lastname: Sun
authors.forename: Veronika Brundula
authors.initials: VB
authors.lastname: Sodja
authors.forename: Timothy H
authors.initials: TH
authors.lastname: Bestor
mesh_terms: D000818:Animals; D002454:Cell Differentiation / Q000187:drug effects / Q000502:physiology; D002455:Cell Division / Q000187:drug effects / Q000502:physiology; D002460:Cell Line; D002869:Chromosome Aberrations; D054659:Diketopiperazines; D005047:Etoposide / Q000494:pharmacology; D018816:Genes, cdc; D006412:Hematopoietic Stem Cells / Q000166:cytology* / Q000187:drug effects / Q000378:metabolism*; D006801:Humans; D051379:Mice; D009474:Neurons / Q000166:cytology* / Q000187:drug effects / Q000378:metabolism*; D010879:Piperazines / Q000494:pharmacology; D013234:Stem Cells / Q000166:cytology* / Q000187:drug effects / Q000378:metabolism*; D013997:Time Factors
chemical_list: D054659:Diketopiperazines; D010879:Piperazines; C070899:4,4'-(1,2-dimethyl-1,2-ethanediyl)bis-2,6-piperazinedione; D005047:Etoposide