title: Comparative proteome analysis of breast cancer and adjacent normal breast tissues in human.
abstract: Two-dimensional polyacrylamide gel electrophoresis (2D-PAGE) and matrix-assisted laser desorption/ionization tandem time-of-flight mass spectrometry (MALDI-TOF/TOF-MS), incorporated with online database searching, were performed to investigate differential proteins of breast cancer and adjacent normal breast tissues. Considering that serum albumin is abundantly presented in normal control samples, 15 differential spots detected in 11 out of 12 (91.7%) breast cancer samples were identified by online SIENA-2DPAGE database searching and MALDI-TOF/TOF-MS analysis. The results indicate that pathological changes of breast cancer are concerned with augmentation of substance metabolism, promotion of proteolytic activity, decline of activity of some inhibitors of enzymes, and so on. Some important proteins involved in the pathological process of breast cancer with changed expression may be useful biomarkers, such as alpha-1-antitrypsin, EF-1-beta, cathepsin D, TCTP, SMT3A, RPS12, and PSMA1, among which SMT3A, RPS12, and PSMA1 were first reported for breast cancer in this study.
authors.affiliation: Department of Anatomy, West China School of Preclinical and Forensic Medicine, Sichuan University, Chengdu 610041, China.
authors.forename: Shi-Shan
authors.initials: SS
authors.lastname: Deng
authors.forename: Tian-Yong
authors.initials: TY
authors.lastname: Xing
authors.forename: Hong-Ying
authors.initials: HY
authors.lastname: Zhou
authors.forename: Ruo-Hong
authors.initials: RH
authors.lastname: Xiong
authors.forename: You-Guang
authors.initials: YG
authors.lastname: Lu
authors.forename: Bin
authors.initials: B
authors.lastname: Wen
authors.forename: Shang-Qing
authors.initials: SQ
authors.lastname: Liu
authors.forename: Hui-Jun
authors.initials: HJ
authors.lastname: Yang
mesh_terms: D000328:Adult; D014408:Biomarkers, Tumor; D001940:Breast / Q000378:metabolism*; D001943:Breast Neoplasms / Q000378:metabolism*; D015180:Electrophoresis, Gel, Two-Dimensional; D005260:Female; D015972:Gene Expression Regulation, Neoplastic; D006801:Humans; D013058:Mass Spectrometry; D008875:Middle Aged; D008958:Models, Molecular; D011379:Prognosis; D040901:Proteomics / Q000379:methods*; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization; D000090324:Tumor Protein, Translationally-Controlled 1
chemical_list: D014408:Biomarkers, Tumor; C000715647:TPT1 protein, human; D000090324:Tumor Protein, Translationally-Controlled 1