Examining the link between chromosomal instability and aneuploidy in human cells.

Examining the link between chromosomal instability and aneuploidy in human cells.
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DOI:
10.1083/jcb.200712029
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发表时间:
2008-02-25
影响因子:
7.8
通讯作者:
Compton, Duane A.
Compton, Duane A.
中科院分区:
生物学1区
文献类型:
--
作者:
Thompson, Sarah L.;Compton, Duane A.

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Solid tumors can be highly aneuploid and many display high rates of chromosome missegregation in a phenomenon called chromosomal instability (CIN). In principle, aneuploidy is the consequence of CIN, but the relationship between CIN and aneuploidy has not been clearly defined. In this study, we use live cell imaging and clonal cell analyses to evaluate the fidelity of chromosome segregation in chromosomally stable and unstable human cells. We show that improper microtubule–chromosome attachment (merotely) is a cause of chromosome missegregation in unstable cells and that increasing chromosome missegregation rates by elevating merotely during consecutive mitoses generates CIN in otherwise stable, near-diploid cells. However, chromosome missegregation compromises the proliferation of diploid cells, indicating that phenotypic changes that permit the propagation of nondiploid cells must combine with elevated chromosome missegregation rates to generate aneuploid cells with CIN.
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