title: [Selection of genes related to multidrug resistance of pancreatic ductal adenocarcinoma by microarray analysis].
abstract: OBJECTIVE
  To investigate the genes concerning multidrug resistance (MDR) of pancreatic ductal adenocarcinoma with microarray analysis.
  
  
  METHODS
  Gene expression profile of pancreatic cancer cell line SW1990 and resistance subline SW1990/5-FU, SW1990/ADM, SW1990/GEM were screened in two independent replicates using oligonucleotide microarray (Affymetrix HG U133 2.0 plus) which contained 38,500 human genes. And advanced bioinformatics analysis was conducted.
  
  
  RESULTS
  Totally, 165 genes and expressed sequence tags (ESTs), which were seldom reported to be related with drug resistance before,were statistically difference and the fold change was up- or down-regulated at least 2 folds in all 3 resistant sub-lines when compared with SW1990. According gene ontology, the genes related to oxidoreductase activity, apoptosis, cell cycle, signal transduction and cell adhesion might be some epigenetic changes for MDR development. Hierarchical clustering analysis, showed several interesting clusters, namely, TNKS2, PRDX4 and CCDC4.
  
  
  CONCLUSIONS
  MDR of pancreatic cancer is a complicated and multifactorial process. In the present study, a widespread differential gene expression pattern was constructed in PDAC multidrug resistant cells. Advanced study will provide new targets for MDR research and cast insights into research of the molecular mechanism of MDR.
authors.affiliation: Department of Surgery, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Science, Beijing, China.
authors.forename: Bin
authors.initials: B
authors.lastname: Feng
authors.forename: Yu-pei
authors.initials: YP
authors.lastname: Zhao
authors.forename: Ge
authors.initials: G
authors.lastname: Chen
authors.forename: Tai-ping
authors.initials: TP
authors.lastname: Zhang
authors.forename: Yuan-de
authors.initials: YD
authors.lastname: Wu
mesh_terms: D000230:Adenocarcinoma / Q000235:genetics / Q000473:pathology; D021441:Carcinoma, Pancreatic Ductal / Q000235:genetics / Q000473:pathology; D045744:Cell Line, Tumor; D016000:Cluster Analysis; D018432:Drug Resistance, Multiple / Q000235:genetics*; D019008:Drug Resistance, Neoplasm / Q000235:genetics*; D004354:Drug Screening Assays, Antitumor; D020869:Gene Expression Profiling / Q000379:methods*; D015972:Gene Expression Regulation, Neoplastic; D006801:Humans; D020411:Oligonucleotide Array Sequence Analysis; D010190:Pancreatic Neoplasms / Q000235:genetics / Q000473:pathology