Human Gene Set: OUELLET_OVARIAN_CANCER_INVASIVE_VS_LMP_DN


Standard name OUELLET_OVARIAN_CANCER_INVASIVE_VS_LMP_DN
Systematic name M10336
Brief description Genes down-regulated in epithelial ovarian cancer (EOC) biopsies: invasive (TOV) vs low malignant potential (LMP) tumors.
Full description or abstract Tumors of low malignant potential (LMP) represent 20% of epithelial ovarian cancers (EOCs) and are associated with a better prognosis than the invasive tumors (TOV). Defining the relationship between LMPs and TOVs remains an important goal towards understanding the molecular pathways that contribute to prognosis, as well as providing molecular markers, for these EOCs. To this end, DNA microarray analyses were performed either in a primary culture or a tumor tissue model system and selected candidate genes showing a distinctive expression profile between LMPs and TOVs were identified using a class prediction approach based on three statistical methods of analysis. Both model systems appear relevant as candidate genes identified by either model allowed the proper reclassification of samples as either LMPs or TOVs. Selected candidate genes (CAS, CCNE1, LGALS8, ITGbeta3, ATP1B1, FLIP, KRT7 and KRT19) were validated by real-time quantitative PCR analysis and show differential expression between LMPs and TOVs. Immunohistochemistry analyses showed that the two tumor classes were distinguishable by their expression of CAS, TNFR1A, FLIP, CKS1 and CCNE1. These results define signature patterns for gene expression of LMPs and TOVs and identify gene candidates that warrant further study to deepen our understanding of the biology of EOC.
Collection C2: Curated
      CGP: Chemical and Genetic Perturbations
Source publication Pubmed 15940270   Authors: Ouellet V,Provencher DM,Maugard CM,Le Page C,Ren F,Lussier C,Novak J,Ge B,Hudson TJ,Tonin PN,Mes-Masson AM
Exact source Table 4S: Pgc > 0
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Source species Homo sapiens
Contributed by Leona Saunders (MSigDB Team)
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identifier namespace		 AFFY_HuGene
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Version history 3.0: First introduced


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