title: Secretomic and proteomic analysis of potential breast cancer markers by two-dimensional differential gel electrophoresis.
abstract: The transformation of a normal cell into a cancer cell has been correlated with alterations in gene regulation and protein expression. To identify altered proteins and link them to the tumorigenesis of breast cancer, we have distinguished normal breast cells (MCF-10A) from noninvasive breast cancer cells (MCF-7) and invasive breast cancer cells (MB-MDA-231) to identify potential breast cancer markers in transformed breast cells. Using the 2D-DIGE and MALDI-TOF MS techniques, we quantified and identified differentially expressed extracellular secreted proteins and total cellular proteins across MCF-7, MB-MDA-231 and MCF-10A. The proteomic analysis of the secreted proteins identified 50 unique differentially expressed proteins from three different media. In addition, 133 unique differentially expressed proteins from total cellular proteins were also identified. Note that 14 of the secreted proteins and 51 of the total cellular proteins have not been previously reported in breast cancer research. Some of these unreported proteins have been examined in other breast cancer cell lines and have shown positive correlations with 2D-DIGE data. In summary, this study identifies numerous putative breast cancer markers from various stages of breast cancer. The results of this study may aid in developing proteins identified as useful diagnostic and therapeutic candidates in research on cancer and proteomics.
authors.affiliation: Institute of Bioinformatics and Structural Biology, National Tsing Hua University, Hsinchu, Taiwan.
authors.forename: Tzu-Chia
authors.initials: TC
authors.lastname: Lai
authors.forename: Hsiu-Chuan
authors.initials: HC
authors.lastname: Chou
authors.forename: Yi-Wen
authors.initials: YW
authors.lastname: Chen
authors.forename: Tian-Ren
authors.initials: TR
authors.lastname: Lee
authors.forename: Hsin-Tsu
authors.initials: HT
authors.lastname: Chan
authors.forename: Hsin-Hsin
authors.initials: HH
authors.lastname: Shen
authors.forename: Wei-Ta
authors.initials: WT
authors.lastname: Lee
authors.forename: Szu-Ting
authors.initials: ST
authors.lastname: Lin
authors.forename: Ying-Chieh
authors.initials: YC
authors.lastname: Lu
authors.forename: Chieh-Lin
authors.initials: CL
authors.lastname: Wu
authors.forename: Hong-Lin
authors.initials: HL
authors.lastname: Chan
mesh_terms: D014408:Biomarkers, Tumor / Q000032:analysis* / Q000378:metabolism; D001943:Breast Neoplasms / Q000737:chemistry* / Q000378:metabolism; D018929:Cell Culture Techniques; D002461:Cell Line, Transformed; D045744:Cell Line, Tumor; D002471:Cell Transformation, Neoplastic / Q000378:metabolism; D015180:Electrophoresis, Gel, Two-Dimensional / Q000379:methods*; D005260:Female; D005455:Fluorescent Antibody Technique; D006801:Humans; D015151:Immunoblotting; D009363:Neoplasm Proteins / Q000032:analysis* / Q000378:metabolism; D020543:Proteome / Q000032:analysis* / Q000378:metabolism; D040901:Proteomics / Q000379:methods*; D015203:Reproducibility of Results; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization
chemical_list: D014408:Biomarkers, Tumor; D009363:Neoplasm Proteins; D020543:Proteome