JOURNAL ARTICLE

FOXA1 is an independent prognostic marker for ER-positive breast cancer

Rutika J Mehta, Rohit K Jain, Samuel Leung, Jennifer Choo, Torsten Nielsen, David Huntsman, Harikrishna Nakshatri, Sunil Badve
Breast Cancer Research and Treatment 2012, 131 (3): 881-90
21503684
Forkhead box protein A1 (FOXA1) is a "pioneer factor" that plays a role in controlling nearly 50% of estrogen receptor target genes. FOXA1 expression correlates with estrogen receptor (ER)-positivity especially in luminal subtype A breast cancers. The aim of this study was to investigate the precise role of FOXA1 in breast cancer using a large population-based cohort. Nuclear expression of FOXA1 was analyzed in a tissue microarray of 4,444 invasive breast cancer cases using immunohistochemistry and correlated with clinicopathologic variables using previously described methods and cutoff points. The entire cohort was equally divided into a training and validation set. All survival analyses were performed using a previously defined cutoff (3) for validation. Additional X-tile analysis performed to analyze prognostic effects of low and high FOXA1 levels identified 24 as a cutoff. Bonferroni-Holmes test was used as appropriate. FOXA1 expression significantly correlated positively with markers of good prognosis or ER-positivity, and negatively with tumor size, tumor grade, nodal status, Ki67, HER2 expression, and basal subtype (each P value <0.0001). In both survival analyses, FOXA1 was a significant predictor of breast cancer-specific survival (P < 0.0001) and relapse-free survival (P < 0.0001). FOXA1 was also an independent predictor of breast cancer-specific survival at 10 years using both cutoffs. Among the ER-positive subgroup treated with tamoxifen, FOXA1 was an independent prognostic marker using the 24 cutoff (P = 0.030). FOXA1 is a significant marker of good prognosis in breast cancer; it also identifies a subset of ER-positive tamoxifen treated patients at low risk of recurrence.

Full Text Links

Find Full Text Links for this Article

Discussion

You are not logged in. Sign Up or Log In to join the discussion.

Related Papers

Remove bar
Read by QxMD icon Read
21503684
×

Save your favorite articles in one place with a free QxMD account.

×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"