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- W1970511605 abstract "Mitotic spindle checkpoint proteins have been shown to play a crucial role in the accurate segregation of chromosomes during cell division. Bub3 is a member of a group of mitotic checkpoint proteins that are essential for this process. To investigate the role of Bub3 in chromosome segregation and cancer development, we analyzed haploinsufficient cells in mice. Heterozygous Bub3 embryonic fibroblasts displayed increased aneuploidy and premature sister-chromatid separation. In addition, when challenged with the microtubule disruptor nocodazole, the cells showed a slight increase in chromatid breakage and a decrease in the mitotic index. No substantial differences were observed between wild-type and Bub3 heterozygous mice in the frequency or the rate at which tumors appeared. Crossing Bub3(+/-) mice onto a heterozygous tumor-suppressor background of Trp53 or Rb1 similarly revealed no substantial differences in either the number or the rate at which tumors appeared. These results suggest that haploinsufficiency of Bub3 causes a slight increase in chromosome instability but is not clearly associated with a noticeable rise in the probability of tumor formation in the animal, possibly because of a partially functional mitotic checkpoint, or cells exhibiting chromosome instability could have activated the apoptosis pathway and thus escaped tumor induction and detection." @default.
- W1970511605 created "2016-06-24" @default.
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- W1970511605 date "2005-05-16" @default.
- W1970511605 modified "2023-10-01" @default.
- W1970511605 title "Increased chromosome instability but not cancer predisposition in haploinsufficientBub3 mice" @default.
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- W1970511605 doi "https://doi.org/10.1002/gcc.20215" @default.
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