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Journal of Biomedicine and Biotechnology
Volume 2006, Article ID 43181, 5 pages
Research Article

Evidence of a Genomic Biomarker in Normal Human Epithelial Mammary Cell Line, MCF-10A, That Is Absent in the Human Breast Cancer Cell Line, MCF-7

Department of Biological Sciences, Clark Atlanta University, 223 James P Brawley Drive, Atlanta, GA 30314, USA

Received 21 November 2005; Accepted 5 April 2006

Copyright © 2006 Brian H. Crawford et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This study investigated the use of DNA amplification fingerprinting (DAF) to identify biomarkers useful in the elucidating genetic factors that lead to carcinogenesis. The DNA amplification fingerprinting (DAF) technique was used to generate fingerprint profiles of a normal human mammary epithelial cell line (MCF-10A) and a human breast cancer cell line (MCF-7). When compared with one another, a polymorphic biomarker gene (262 base pairs (bps)) was identified in MCF-10A but was not present in MCF-7. This gene was cloned from the genomic DNA of the MCF-10A cell line, and subjected to Genbank database analysis. The analysis of the nucleotide sequence polymorphic marker (Genbank account: AC079630) shows that this biomarker has 100% homology with the nucleotide sequence of human chromosome 12 BAC RP11-476D10 (bps 19612-19353). The nucleotide sequence was used for possible protein translation product and the result obtained indicated that the gene codes for hypothetical protein XF2620. In order to evaluate the effects that the 262 bps biomarker would have on the morphology of MCF-7 cells, it was transfected into MCF-7 cells. There were observable changes in the morphology of the transfected cells. These changes included an increase in cell elongation and a decrease in cell aggregation.