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Cancer Sci. 2012 Apr;103(4):806-12. doi: 10.1111/j.1349-7006.2012.02201.x. Epub 2012 Feb 7.

Forkhead box transcription factor, forkhead box A1, shows negative association with lymph node status in endometrial cancer, and represses cell proliferation and migration of endometrial cancer cells.

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  • 1Division of Gene Regulation and Signal Transduction, Research Center for Genomic Medicine, Saitama Medical University, Saitama, Japan.


Endometrial cancer is the most common malignancy of the female genital tract and is associated with poor prognosis. It is primarily a hormone-dependent cancer that is regulated by steroid hormones, including estrogen and progesterone. Forkhead box A1 (FOXA1) is a member of the forkhead box transcription factor family and functions as a pioneer factor in estrogen receptor (ER)-positive breast cancer. In the present study, we investigated the expression of FOXA1 in endometrial cancers by immunohistochemical analysis. Nuclear immunoreactivity for FOXA1 was detected in 40 of 109 cases (37%), and was found to be negatively associated with lymph node status (P = 0.033). In ER-positive Ishikawa endometrial cancer cells, small interfering RNA-mediated downregulation of FOXA1 promoted cell proliferation and migration. Furthermore, exogenously introduced FOXA1 suppressed both proliferation and migration of Ishikawa cells. These results suggest that FOXA1 functions as a tumor suppressor through modulation of proliferation and migration of endometrial cancer cells.

© 2012 Japanese Cancer Association.

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