title: Comparative proteomic analysis of colon cancer cells in response to oxaliplatin treatment.
abstract: Colon cancer is one of the most common malignancies in the world. Oxaliplatin, a third-generation platinum compound, is widely used in clinical chemotherapy of colon cancer. Although the mechanisms of the antitumor effect of Oxaliplatin have been investigated in recent years, the proteomic changes that are associated with the cellular response to this compound are poorly understood. In this study, we performed a comparative proteomic analysis to survey the global changes in protein expression levels after Oxaliplatin treatment in three colon cancer cell lines: HT29, SW620, and LoVo. Two-dimensional gel electrophoresis coupled with MALDI-TOF/TOF mass spectrometry revealed 57, 48, and 53 differentially expressed proteins in the three cell lines (HT29, SW620 and LoVo, respectively) after Oxaliplatin treatment. Of these proteins, 21 overlapped among all three cell lines. These overlapping proteins participate in many cellular processes, such as apoptosis, signal transduction, transcription and translation, cell structural organization, and metabolism. Additionally, the expression levels of ezrin (EZRI), heat-shock protein beta-1 (HSPB1), translationally controlled tumor protein (TCTP), and cell division control protein 2 homolog (CDC2) were confirmed by immunoblotting. This is the first direct proteomic analysis of Oxaliplatin-treated colon cancer cells. Several interesting proteins that we found warrant further investigation owing to their potential significant functions in the antitumor effect of Oxaliplatin.
authors.affiliation: College of Life Science, Zhejiang Sci-Tech University, Hangzhou 310018, China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Yao
authors.forename: Xiao-Yuan
authors.initials: XY
authors.lastname: Jia
authors.forename: Hong-Yu
authors.initials: HY
authors.lastname: Tian
authors.forename: Yu-Xiang
authors.initials: YX
authors.lastname: Jiang
authors.forename: Gen-Jun
authors.initials: GJ
authors.lastname: Xu
authors.forename: Qi-Jun
authors.initials: QJ
authors.lastname: Qian
authors.forename: Fu-Kun
authors.initials: FK
authors.lastname: Zhao
mesh_terms: D000970:Antineoplastic Agents / Q000627:therapeutic use*; D017209:Apoptosis / Q000187:drug effects; D002453:Cell Cycle / Q000187:drug effects; D045744:Cell Line, Tumor; D049109:Cell Proliferation / Q000187:drug effects; D003110:Colonic Neoplasms / Q000188:drug therapy* / Q000378:metabolism* / Q000473:pathology; D015180:Electrophoresis, Gel, Two-Dimensional; D006801:Humans; D015151:Immunoblotting; D009363:Neoplasm Proteins / Q000302:isolation & purification / Q000378:metabolism; D009944:Organoplatinum Compounds / Q000627:therapeutic use*; D000077150:Oxaliplatin; D020543:Proteome / Q000187:drug effects / Q000302:isolation & purification / Q000378:metabolism*; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization; D053719:Tandem Mass Spectrometry; D000090324:Tumor Protein, Translationally-Controlled 1
chemical_list: D000970:Antineoplastic Agents; D009363:Neoplasm Proteins; D009944:Organoplatinum Compounds; D020543:Proteome; C000715647:TPT1 protein, human; D000090324:Tumor Protein, Translationally-Controlled 1; D000077150:Oxaliplatin