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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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The Hairy and Enhancer of Split homologue-1 (HES-1) mediates the proliferative effect of 17beta-estradiol on breast cancer cell lines.

The mechanism behind hormone dependent growth of breast cancer is presently not well understood. We show that the HES-1 protein level in the breast cancer cell lines T47D and MCF-7 is down regulated by 17beta-estradiol treatment. This regulation could be reversed by addition of the anti-estrogens 4OH tamoxifen, raloxifen and Imperial Chemical Industries (ICI) 182,780. In T47D cells with inducible exogenous HES-1 expression, induced expression of HES-1 protein prevented the proliferative effect of 17beta-estradiol and subsequent up regulation of proliferating cell nuclear antigen (PCNA). An inverse correlation between the HES-1 and PCNA protein levels respectively was found in colon cancer cell lines. These findings point to a potential role of HES-1 as a tumor suppressor in epithelial cells, and as a mediator of 17beta-estradiols proliferative effect on breast cancer cells.[1]

References

  1. The Hairy and Enhancer of Split homologue-1 (HES-1) mediates the proliferative effect of 17beta-estradiol on breast cancer cell lines. Ström, A., Arai, N., Leers, J., Gustafsson, J.A. Oncogene (2000) [Pubmed]
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