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- W2105353553 abstract "In this work we have applied in situ hybridization with alphoid centromeric probes specific to chromosomes 7 and 11 to ana-telophase cells from human primary fibroblasts. The aim was to visualize the events leading to aneuploidy directly during anaphase, analyse the induction of aneuploidy during this mitotic stage and compare the frequencies of chromosome malsegregation observed in ana-telophases with the estimated malsegregation obtained in binucleate cells after a short cytochalasin B treatment. Significantly higher frequencies of chromosome loss and chromosome non-disjunction were observed in fibroblasts undergoing ana-telophase during recovery from a nocodazole-induced mitotic arrest compared with binucleate cells obtained by a further 30 min incubation with cytochalasin B. Using the same experimental schedule, analysis of hybridization signals in mononucleate cells showed higher frequencies of polyploid nuclei in cytochalasin B-treated cultures, indicating that part of the ana-telophases observed after release from the nocodazole-induced mitotic arrest may give rise to polyploid mononucleate cells instead of binucleate ones. A reduced distance between spindle poles was also measured in cells undergoing ana-telophase in the presence of cytochalasin B. Our study suggests that in nocodazole and cytochalasin B-treated cultures the shorter pole-to-pole distance may favour the reformation of a single membrane around telophase chromosomes, especially when several lagging chromosomes lie between the two future daughter nuclei. This would give rise to polyploid mononucleate cells at the ensuing interphase." @default.
- W2105353553 created "2016-06-24" @default.
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- W2105353553 date "1999-11-01" @default.
- W2105353553 modified "2023-10-13" @default.
- W2105353553 title "Differences in malsegregation rates obtained by scoring ana-telophases or binucleate cells" @default.
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- W2105353553 doi "https://doi.org/10.1093/mutage/14.6.563" @default.
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