Abstract:
AIMS:Fos-related antigen 1 (Fra-1) is a member of the activator protein 1 (AP-1) transcription factor family. Our objective was to evaluate the role of Fra-1 expression in breast carcinoma progression and prognosis. METHODS AND RESULTS:Fra-1 expression was investigated by immunohistochemistry in two tissue microarrays containing, respectively, 85 ductal carcinoma in situ (DCIS) and 771 invasive ductal carcinoma (IDC) samples. Staining was observed in the nucleus and cytoplasm of the carcinomas, but only nuclear staining was considered to be positive. Fibroblasts associated with IDC were also Fra-1-positive. The frequency of Fra-1 positivity in IDC (22.8%) was lower than that in DCIS (42.2%). No association was found between Fra-1 and clinico-pathological variables in DCIS. In IDC, Fra-1 expression correlated with aggressive phenotype markers, including: high grade, oestrogen receptor negativity and human epidermal growth factor receptor 2 (HER-2) positivity (P=0.001, 0.015 and 0.004, respectively), and marginally with the presence of metastasis (P=0.07). Fra-1 was more frequently positive in basal-like (34%) and in HER-2-positive (38.5%) subtypes than in luminal subtypes. Fra-1 presence did not correlate with survival. CONCLUSIONS:A high frequency of Fra-1 in DCIS tumours may be associated with early events in breast carcinogenesis. Although Fra-1 expression correlated with features of a more aggressive phenotype in IDC, no relationship with overall survival was found.
journal_name
Histopathologyjournal_title
Histopathologyauthors
Logullo AF,Stiepcich MM,Osório CA,Nonogaki S,Pasini FS,Rocha RM,Soares FA,Brentani MMdoi
10.1111/j.1365-2559.2011.03785.xsubject
Has Abstractpub_date
2011-03-01 00:00:00pages
617-25issue
4eissn
0309-0167issn
1365-2559journal_volume
58pub_type
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