title: MicroRNA profile of paclitaxel-resistant serous ovarian carcinoma based on formalin-fixed paraffin-embedded samples.
abstract: BACKGROUND
  To assess the feasibility of validating microRNA (miRNA) profile related to paclitaxel-sensitivity in formalin-fixed paraffin-embedded (FFPE) samples of serous ovarian carcinoma (OC) patients.
  
  
  METHODS
  Deregulated miRNAs identified by miRNA microarray were further detected in 45 FFPE OC samples using Realtime PCR. Correlations between paired FFPE and frozen tumor samples were analyzed. Survival times were compared between 6 high and low miRNAs groups. Western blot and luciferase reporter assay were used for validating the target of miRNA.
  
  
  RESULTS
  Sixteen up-regulated miRNAs and twenty-three down-regulated miRNAs were revealed in pacilitaxel-resistant ST30 cells. The up-regulated miRNAs (miR-320a, 22 and 129-5p) and down-regulated miRNAs (miR-9, 155 and 640) were confirmed in paclitaxel-resistant FFPE tumor samples, compared with paclitaxel-sensitive samples. Higher miR-9 and miR-640 showed better survival time in OC patients. Expressions of miR-9, 155 and 22 in FFPE samples were closely mimicked by those in frozen tissues. RAB34 was validated as a direct target of miR-9.
  
  
  CONCLUSIONS
  We validated miRNA profile in pacilitaxel-resistant OC using FFPE samples, which might enable treatment stratification and help us to predict outcomes in OC patients. FFPE samples are feasible materials for miRNA research.
authors.affiliation: Women's Reproductive Health Laboratory of Zhejiang Province, Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, China.
authors.forename: Xiao
authors.initials: X
authors.lastname: Li
authors.forename: Yaer
authors.initials: Y
authors.lastname: Lu
authors.forename: Yaxia
authors.initials: Y
authors.lastname: Chen
authors.forename: Weiguo
authors.initials: W
authors.lastname: Lu
authors.forename: Xing
authors.initials: X
authors.lastname: Xie
mesh_terms: D000328:Adult; D000368:Aged; D000972:Antineoplastic Agents, Phytogenic; D002277:Carcinoma / Q000235:genetics*; D045744:Cell Line, Tumor; D015536:Down-Regulation; D019008:Drug Resistance, Neoplasm / Q000235:genetics*; D005260:Female; D006801:Humans; D053208:Kaplan-Meier Estimate; D035683:MicroRNAs / Q000235:genetics*; D008875:Middle Aged; D009687:Nuclear Proteins; D020411:Oligonucleotide Array Sequence Analysis; D010051:Ovarian Neoplasms / Q000235:genetics*; D017239:Paclitaxel; D060888:Real-Time Polymerase Chain Reaction; D015854:Up-Regulation; D020691:rab GTP-Binding Proteins / Q000378:metabolism
chemical_list: D000972:Antineoplastic Agents, Phytogenic; C524942:MIRN155 microRNA, human; C548375:MIRN22 microRNA, human; C572916:MIRN320 microRNA, human; C585535:MIRN640 microRNA, human; C541874:MIRN92 microRNA, human; D035683:MicroRNAs; C541915:Mirn129 microRNA, human; D009687:Nuclear Proteins; C567953:RAB34 protein, human; D020691:rab GTP-Binding Proteins; D017239:Paclitaxel