| Literature DB >> 18039470 |
Noritaka Yamaguchi1, Emi Ito, Sakura Azuma, Reiko Honma, Yuka Yanagisawa, Akira Nishikawa, Mika Kawamura, Jun-Ichi Imai, Kuniaki Tatsuta, Jun-Ichiro Inoue, Kentaro Semba, Shinya Watanabe.
Abstract
The forkhead transcription factor FoxA1 is thought to be involved in mammary tumorigenesis. However, the precise role of FoxA1 in breast cancer development is controversial. We examined expression of FoxA1 in 35 human breast cancer cell lines and compared it with that of ErbB2, a marker of poor prognosis in breast cancer. We found that FoxA1 is expressed at high levels in all ErbB2-positive cell lines and a subset of ErbB2-negative cell lines. Down-regulation of FoxA1 by RNA interference significantly suppressed proliferation of ErbB2-negative and FoxA1-positive breast cancer cell lines. Down-regulation of FoxA1 also enhanced the toxic effect of Herceptin on ErbB2-positive cell lines through induction of apoptosis. Taken together with previous data that FoxA1 is a marker of luminal cells in mammary gland, our present results suggest that FoxA1 plays an important role as a lineage-specific oncogene in proliferation of cancer cells derived from mammary luminal cells.Entities:
Mesh：
Substances：
Year: 2007 PMID： 18039470 DOI： 10.1016/j.bbrc.2007.11.064
Source DB: PubMed Journal: Biochem Biophys Res Commun ISSN： 0006-291X Impact factor: 3.575