title: Proteome analysis of differential protein expression in cervical cancer cells after paclitaxel treatment.
abstract: OBJECTIVE
  It is well known that infection with HPV (human papillomavirus) is the main cause of cervical cancer and certain types of HPV are recognized as carcinogens. At present, there is little information regarding the antineoplastic mechanism of paclitaxel against cervical carcinoma cells. We thus tried to analyze differential protein expression and antineoplastic mechanism-related proteins after paclitaxel treatment on cervical cancer cells by using a proteomic analysis and to investigate the mechanism of action.
  
  
  METHODS
  Using proteomics analysis including 2-DE and MALDI-TOF-MS, we detected the antineoplastic mechanism-related proteins. Then, we performed western blot analysis for apoptosis- and transformation-related proteins to confirm expression patterns derived from proteome analysis after paclitaxel treatment.
  
  
  RESULTS
  We identified several cellular proteins that are responsive to paclitaxel treatment in HeLa cells using proteomics methods. Paclitaxel treatment elevated mainly apoptosis, immune response and cell cycle check point-related proteins. On the other hand, paclitaxel treatment diminished growth factor/oncogene-related proteins and transcription regulation-related proteins. Also, in the HPV-associated cervical carcinoma cells, paclitaxel demonstrated anti-proliferative activity through the membrane death receptor-mediated apoptotic pathway and the mitochondrial-mediated pathway.
  
  
  CONCLUSIONS
  Identification and characterization of functionally modulated proteins involved in anti-cancer regulatory events should lead to a better understanding of the long-term actions of paclitaxel at the molecular level and will contribute to the future development of novel therapeutic drug treatments based upon current therapies.
authors.affiliation: Department of Medical Bioscience, Graduate School of Catholic University, Catholic University Medical College, Republic of Korea.
authors.forename: Eun-Kyoung
authors.initials: EK
authors.lastname: Yim
authors.forename: Jun-Sang
authors.initials: JS
authors.lastname: Bae
authors.forename: Seung-Bak
authors.initials: SB
authors.lastname: Lee
authors.forename: Keun-Ho
authors.initials: KH
authors.lastname: Lee
authors.forename: Chan-Joo
authors.initials: CJ
authors.lastname: Kim
authors.forename: Sung-Eun
authors.initials: SE
authors.lastname: Namkoong
authors.forename: Soo-Jong
authors.initials: SJ
authors.lastname: Um
authors.forename: Jong-Sup
authors.initials: JS
authors.lastname: Park