J Breast Cancer.  2011 Dec;14(4):262-268. 10.4048/jbc.2011.14.4.262.

Clinical Significance of Annexin A1 Expression in Breast Cancer

Affiliations
  • 1Department of Surgery, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea.
  • 2Department of Surgery and Cancer Research Institute, Seoul National University College of Medicine, Seoul, Korea.
  • 3Department of Pathology, KEPCO Medical Foundation, Hanil General Hospital, Seoul, Korea.
  • 4Department of Surgery, Ewha Womans University School of Medicine, Seoul, Korea. mbit@ewha.ac.kr
  • 5Department of Surgery, National Police Hospital, Seoul, Korea.

Abstract

PURPOSE
The expression of Annexin A1 (ANXA1) is known to be reduced in human breast cancer; however, the role of ANXA1 expression in the development of breast cancer remains unclear. In this study, we determined the relationship between the expression features of ANXA1 and the prognostic factors of breast cancer.
METHODS
Human breast tissues were obtained from patients specimens who had undergone breast surgery or core needle biopsies. The patterns of ANXA1 expression were analyzed by immunohistochemical staining in relation to histopathological diagnosis, clinical characteristics and outcomes.
RESULTS
One hundred eighty-two cases were included and the mean age of the patients was 46.34 +/- 11.5 years. A significant loss of ANXA1 expression was noted in both ductal carcinoma in situ (DCIS) and invasive carcinomas compared to normal breast tissues (p<0.001) and benign breast diseases (p<0.001). There was a significant alteration in ANXA1 expression according to hormone receptor status (p<0.001), cancer intrinsic type (p<0.001), and nuclear grade (p=0.004) in invasive cancer. In a univariate analysis, ANXA1 positivity tended to be related with poor breast cancer-related survival (p=0.062); however, the same results was not realized in multivariate results (p=0.406). HER2 overexpression and TNM staging were significantly associated with relapse-free survivals (RFS) in the multivariate analysis (p=0.037, p=0.048, respectively). In particular, in node-positive patients (p=0.048), HER2 overexpressed patients (p=0.013), and non-triple negative breast cancer patients (p=0.002), ANXA1 overexpression was correlated with poor RFS.
CONCLUSION
Although significant loss of ANXA1 expression was noted in breast cancer including DCIS and invasive carcinoma, in cases of invasive cancer, overexpression of ANXA1 was related to unfavorable prognostic factors. And these results imply that ANXA1 plays dualistic roles and is involved in variable mechanisms related to cancer development and progression.

Keyword

Annexin A1; Breast neoplasms

MeSH Terms

Annexin A1
Biopsy, Large-Core Needle
Breast
Breast Diseases
Breast Neoplasms
Carcinoma, Intraductal, Noninfiltrating
Humans
Multivariate Analysis
Neoplasm Staging
Annexin A1

Figure

  • Figure 1 Immunohistochemistry for Annexin A1 (ANXA1) expression. (A) ANXA1 is strongly expressed in myoepithelium (arrowhead) compared to epithelium (arrow) in normal breast tissue (× 400). (B) There is a significant ANXA1 loss in invasive ductal carcinoma (× 100).

  • Figure 2 Five-year relapse-free survival according to Annexin A1 (ANXA1) expression with clinical variables. ANXA1 positive groups have poor relapse-free survivals in node-positive patients (A), in HER2-positive patients (B), and in non-triple negative breast cancer patients (C).


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