Publication Date:
2011-06-10
Description:
Cyclin D1 is a component of the core cell cycle machinery. Abnormally high levels of cyclin D1 are detected in many human cancer types. To elucidate the molecular functions of cyclin D1 in human cancers, we performed a proteomic screen for cyclin D1 protein partners in several types of human tumours. Analyses of cyclin D1 interactors revealed a network of DNA repair proteins, including RAD51, a recombinase that drives the homologous recombination process. We found that cyclin D1 directly binds RAD51, and that cyclin D1-RAD51 interaction is induced by radiation. Like RAD51, cyclin D1 is recruited to DNA damage sites in a BRCA2-dependent fashion. Reduction of cyclin D1 levels in human cancer cells impaired recruitment of RAD51 to damaged DNA, impeded the homologous recombination-mediated DNA repair, and increased sensitivity of cells to radiation in vitro and in vivo. This effect was seen in cancer cells lacking the retinoblastoma protein, which do not require D-cyclins for proliferation. These findings reveal an unexpected function of a core cell cycle protein in DNA repair and suggest that targeting cyclin D1 may be beneficial also in retinoblastoma-negative cancers which are currently thought to be unaffected by cyclin D1 inhibition.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3134411/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉 〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3134411/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jirawatnotai, Siwanon -- Hu, Yiduo -- Michowski, Wojciech -- Elias, Joshua E -- Becks, Lisa -- Bienvenu, Frederic -- Zagozdzon, Agnieszka -- Goswami, Tapasree -- Wang, Yaoyu E -- Clark, Alan B -- Kunkel, Thomas A -- van Harn, Tanja -- Xia, Bing -- Correll, Mick -- Quackenbush, John -- Livingston, David M -- Gygi, Steven P -- Sicinski, Piotr -- P01 CA080111/CA/NCI NIH HHS/ -- P01 CA080111-12/CA/NCI NIH HHS/ -- P01 CA109901/CA/NCI NIH HHS/ -- P01 CA109901-07/CA/NCI NIH HHS/ -- P30 AI060354/AI/NIAID NIH HHS/ -- R01 CA083688/CA/NCI NIH HHS/ -- R01 CA083688-10/CA/NCI NIH HHS/ -- R01 CA138804/CA/NCI NIH HHS/ -- R01 CA138804-02/CA/NCI NIH HHS/ -- Z01 ES065089-11/Intramural NIH HHS/ -- England -- Nature. 2011 Jun 8;474(7350):230-4. doi: 10.1038/nature10155.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cancer Biology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts 02215, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21654808" target="_blank"〉PubMed〈/a〉
Keywords:
Animals
;
Cell Line, Tumor
;
Comet Assay
;
Cyclin D1/deficiency/*metabolism
;
DNA Damage/radiation effects
;
*DNA Repair/radiation effects
;
HeLa Cells
;
Humans
;
Mice
;
Neoplasms/genetics/*metabolism/pathology
;
Protein Binding/radiation effects
;
*Protein Interaction Mapping
;
Rad51 Recombinase/*metabolism
;
Radiation, Ionizing
;
Recombination, Genetic/genetics
;
Retinoblastoma Protein/deficiency
Print ISSN:
0028-0836
Electronic ISSN:
1476-4687
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
,
Natural Sciences in General
,
Physics
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