Human Gene Set: LU_TUMOR_ENDOTHELIAL_MARKERS_UP


Standard name LU_TUMOR_ENDOTHELIAL_MARKERS_UP
Systematic name M17004
Brief description Genes specifically up-regulated in tumor endothelium.
Full description or abstract Therapeutic strategies based on antiangiogenic approaches are beginning to show great promise in clinical studies. However, full realization of these approaches requires identification of key differences in gene expression between endothelial cells from tumors versus their normal counterparts. Here, we examined gene expression differences in purified endothelial cells from 10 invasive epithelial ovarian cancers and 5 normal ovaries using Affymetrix U133 Plus 2.0 microarrays. More than 400 differentially expressed genes were identified in tumor-associated endothelial cells. We selected and validated 23 genes that were overexpressed by 3.6- to 168-fold using real-time reverse transcription-PCR and/or immunohistochemistry. Among these, the polycomb group protein enhancer of Zeste homologue 2 (EZH2), the Notch ligand Jagged1, and PTK2 were elevated 3- to 4.3-fold in tumor-associated endothelial cells. Silencing these genes individually with small interfering RNA blocked endothelial cell migration and tube formation in vitro. The present study shows that tumor and normal endothelium differ at the molecular level, which may have significant implications for the development of antiangiogenic therapies.
Collection C2: Curated
      CGP: Chemical and Genetic Perturbations
Source publication Pubmed 17308118   Authors: Lu C,Bonome T,Li Y,Kamat AA,Han LY,Schmandt R,Coleman RL,Gershenson DM,Jaffe RB,Birrer MJ,Sood AK
Exact source Table 3: Fold difference > 6
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Source species Homo sapiens
Contributed by Jessica Robertson (MSigDB Team)
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identifier namespace		 Human_NCBI_Gene_ID
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Version history 3.0: First introduced

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