title: MicroRNA expression in human endometrial adenocarcinoma.
abstract: BACKGROUND
  MicroRNAs are small non-coding RNAs that play crucial roles in the pathogenesis of different cancer types. The aim of this study was to identify miRNAs that are differentially expressed in endometrial adenocarcinoma compared to healthy endometrium. These miRNAs can potentially be used to develop a panel for classification and prognosis in order to better predict the progression of the disease and facilitate the choice of treatment strategy.
  
  
  METHODS
  Formalin fixed paraffin embedded endometrial tissue samples were collected from the Örebro university hospital. QPCR was used to quantify the expression levels of 742 miRNAs in 30 malignant and 20 normal endometrium samples. After normalization of the qPCR data, miRNAs differing significantly in expression between normal and cancer samples were identified, and hierarchical clustering analysis was used to identify groups of miRNAs with coordinated expression profiles.
  
  
  RESULTS
  In comparisons between endometrial adenocarcinoma and normal endometrium samples 138 miRNAs were found to be significantly differentially expressed (p < 0.001) among which 112 miRNAs have not been previous reported for endometrial adenocarcinoma.
  
  
  CONCLUSIONS
  Our study shows that several miRNAs are differentially expressed in endometrial adenocarcinoma. These identified miRNA hold great potential as target for classification and prognosis of this disease. Further analysis of the differentially expressed miRNA and their target genes will help to derive new biomarkers that can be used for classification and prognosis of endometrial adenocarcinoma.
authors.affiliation: Systems Biology Research Centre - Tumor Biology, Bio Science, University of Skövde, SE541 28, Skövde, Sweden.
authors.forename: Sanja
authors.initials: S
authors.lastname: Jurcevic
authors.affiliation: Systems Biology Research Centre - Bioinformatics, Bio Science, University of Skövde, Skövde, Sweden.
authors.forename: Björn
authors.initials: B
authors.lastname: Olsson
authors.affiliation: Systems Biology Research Centre - Tumor Biology, Bio Science, University of Skövde, SE541 28, Skövde, Sweden.
authors.forename: Karin
authors.initials: K
authors.lastname: Klinga-Levan
keywords: Endometrial adenocarcinoma; MicroRNA; Quantitative polymerase chain reaction