FoxA1 as a lineage-specific oncogene in luminal type breast cancer.

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.

authors

Yamaguchi N,Ito E,Azuma S,Honma R,Yanagisawa Y,Nishikawa A,Kawamura M,Imai J,Tatsuta K,Inoue J,Semba K,Watanabe S

doi

10.1016/j.bbrc.2007.11.064

subject

Has Abstract

pub_date

2008-01-25 00:00:00

pages

711-7

issue

4

eissn

0006-291X

issn

1090-2104

pii

S0006-291X(07)02430-8

journal_volume

365

pub_type

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