Display Settings:

Format

Send to:

Choose Destination
See comment in PubMed Commons below
Curr Biol. 2009 Dec 1;19(22):1937-42. doi: 10.1016/j.cub.2009.09.055. Epub 2009 Oct 29.

Deviant kinetochore microtubule dynamics underlie chromosomal instability.

Author information

  • 1Department of Biochemistry, Dartmouth Medical School, Hanover, NH 03755, USA.

Abstract

The persistent malattachment of microtubules to chromosomes at kinetochores is a major mechanism of chromosomal instability (CIN) [1, 2]. In normal diploid cells, malattachments arise spontaneously and are efficiently corrected to preserve genomic stability [3]. However, it is unknown whether cancer cells with CIN possess the ability to efficiently correct attachment errors. Here we show that kinetochore microtubule attachments in cancer cells with CIN are inherently more stable than those in normal diploid RPE-1 cells. The observed differences in attachment stability account for the persistence of malattachments into anaphase, where they cause chromosome missegregation. Furthermore, increasing the stability of kinetochore microtubule attachments in normal diploid RPE-1 cells, either by depleting the tumor suppressor protein APC or the kinesin-13 protein MCAK, is sufficient to promote chromosome segregation defects to levels comparable to those in cancer cells with CIN. Collectively, these data identify that cancer cells have a diminished capacity to correct erroneous kinetochore microtubule attachments and account for the widespread occurrence of CIN in tumors [4].

Comment in

PMID:
19879145
[PubMed - indexed for MEDLINE]
PMCID:
PMC2787757
Free PMC Article

Images from this publication.See all images (3)Free text

Figure 1
Figure 2
Figure 3
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Elsevier Science Icon for PubMed Central
    Loading ...
    Write to the Help Desk