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Br J Cancer. 2000 Dec; 83(11): 1473–1479.
Published online 2000 Nov 22. doi:  10.1054/bjoc.2000.1488
PMCID: PMC2363420

Expression of calcium-binding protein S100A2 in breast lesions


A suppression subtraction cDNA library representing mRNAs expressed at a higher level in a benign breast tumour-derived cell line relative to the malignant MCF-7A cell line contained cDNAs corresponding to mRNAs for plasminogen activator inhibitor I, annexin VIII and the EF-hand protein S100A2. S100A2 protein has previously been shown to be expressed in normal human breast epithelium, but not in human breast carcinoma cell lines. Using a PCR-based assay and in situ hybridization on histological sections of human breast specimens, the mRNA for S100A2 was shown to be present in all benign breast lesions examined as well as in normal epithelium. S100A2 mRNA was detectable in 37% of specimens of carcinoma in situ, but in less than 15% of carcinoma specimens. The results suggest that the loss of S100A2 is associated with the development of malignant cells and is not associated with early tumour development. © 2000 Cancer Research Campaign http://www.bjcancer.com

Keywords: S100A2, breast cancer, in situ hybridization, carcinoma in situ, suppression subtractive hybridization

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