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1.
  • Nguyen, Hao G., et al. (författare)
  • Deregulated Aurora-B induced tetraploidy promotes tumorigenesis
  • 2009
  • Ingår i: The FASEB Journal. - : Wiley. - 0892-6638 .- 1530-6860. ; 23:8, s. 2741-2748
  • Tidskriftsartikel (refereegranskat)abstract
    • High expression of Aurora-B has been observed in various cancers, and inhibition of this kinase has been shown to halt cellular proliferation. However, the mechanism of effect of Aurora-B on cellular transformation has not been fully explored. Here, we show that overexpression of Aurora-B in murine epithelial cells promotes generation of tetraploids. In search of a related mechanism, spectral karyotyping was carried out, showing premature chromatid separation (PCS). Of interest, PCS is a hallmark of Robert's syndrome, which also involves cellular polyploidy and aneuploidy. Sorted tetraploid Aurora-B-overexpressing cells promoted significant mammary epithelial cancers when injected into nude mice, as compared to injection of nonfractionated cells, suggesting that tetraploidy is an important mediator of Aurora-B-induced tumorigenesis. Comparative chromosome hybridization performed on DNA derived from tetraploid cell-induced tumors indicates amplifications and deletions of regions throughout the genome, which include tumor-promoting or tumor-suppressing genes, respectively. Thus, sustained expression of Aurora-B induces tetraploidy, which, in turn, facilitates genomic instability and tumor development in a xenograft model
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2.
  • 2019
  • Tidskriftsartikel (refereegranskat)
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