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Yin Yang 1 positively regulates BRCA1 and inhibits mammary cancer formation

  1. Author:
    Lee, M. H.
    Lahusen, T.
    Wang, R. H.
    Xiao, C.
    Xu, X.
    Hwang, Y. S.
    He, W. W.
    Shi, Y.
    Deng, C. X.

  2. Author Address

    [Lee, M-H; Lahusen, T.; Wang, R-H; Xiao, C.; Xu, X.; Deng, C-X] NIDDK, Genet Dev & Dis Branch, NIH, Bethesda, MD 20892 USA. [Hwang, Y-S] NCI, Lab Cell & Dev Signaling, NIH, Frederick, MD 21701 USA. [He, W-W] Origene Technol Inc, Rockville, MD USA. [Shi, Y.] Harvard Univ, Sch Med, Dept Pathol, Boston, MA 02115 USA.;Deng, CX (reprint author), NIDDK, Genet Dev & Dis Branch, NIH, 9000 Rockville Pike,Bldg 10,Rm 9N105, Bethesda, MD 20892 USA;chuxiad@bdg10.niddk.nih.gov
    1. Year: 2012
    2. Date: Jan
  2. Journal: Oncogene
    1. 31
    2. 1
    3. Pages: 116-127
  4. Type of Article: Article
  5. ISSN: 0950-9232
  1. Abstract:

    Expression of the breast cancer-associated gene 1 (BRCA1) in sporadic breast cancers is usually reduced, yet the underlying mechanisms remains elusive. To identify factors that are responsible for reduced BRCA1 expression, we screened 92 known transcription factors for their ability to regulate expression of BRCA1. Among several potential regulators, the Gli-Krueppel-related transcription factor Yin Yang 1 (YY1) showed the most dramatic transactivation of the BRCA1 promoter. YY1 binds to the promoter of BRCA1, and its overexpression resulted in increased expression of BRCA1 and a number of BRCA1 downstream genes. We further showed that overexpression of YY1 in cancer cells inhibited cell proliferation, foci formation and tumor growth in nude mice. To assess the clinical relevance between YY1 and BRCA1, we studied expression of YY1 and BRCA1 from human breast cancer samples and tissue arrays, and detected a significant positive correlation between the level of YY1 and BRCA1 expression in these cancers. Taken together, these findings suggest that YY1 is a key regulator of BRCA1 expression and may be causally linked to the molecular etiology of human breast cancer. Oncogene (2012) 31, 116-127; doi: 10.1038/onc.2011.217; published online 13 June 2011

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External Sources

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  2. DOI: 10.1038/onc.2011.217
  3. View record in Web of Science®
  4. WOS: 000299176200011

Library Notes

  1. Fiscal Year: FY2011-2012
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