alexa Association between ductal fluid proteomic expression profiles and the presence of lymph node metastases in women with breast cancer.
Molecular Biology

Molecular Biology

Journal of Cytology & Histology

Author(s): Kuerer HM, Coombes KR, Chen JN, Xiao L, Clarke C,

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Abstract BACKGROUND: Proteomic analysis of nipple aspiration fluid (NAF) is a noninvasive method for studying the local biologic microenvironment of the breast ducts where carcinoma originates. METHODS: NAF samples from each breast of 23 women with stage I or II unilateral invasive breast carcinoma were collected, and protein expression was analyzed comprehensively by using protein arrays and time-of-flight mass spectrometry. Blinded hierarchical clustering analysis was performed to identify potential associations between protein expression patterns and clinicopathologic factors. RESULTS: After analysis of all spectra, 463 distinct peaks in the mass range of 7 to 30 kD were identified in NAF samples. Blinded hierarchical clustering analysis of protein expression patterns demonstrated a conservation of these patterns between the breasts of individual patients (P=.0003 x 10(-12)). Hierarchical clustering revealed an association between protein expression patterns, and the presence and absolute number of axillary lymph nodes containing metastases (P=.038). CONCLUSIONS: Protein expression patterns are highly conserved between cancerous and noncancerous breasts in women with unilateral invasive breast cancer; unique expression patterns may be associated with extent of disease. High-throughput proteomic methods may reveal biologically relevant proteins involved in carcinogenesis and progression of disease. This article was published in Surgery and referenced in Journal of Cytology & Histology

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