title: DEC1 expression in 1p-aberrant oligodendroglial neoplasms.
abstract: Expression of hypoxia-related tissue factors in 1p-aberrant oligodendroglial neoplasms diminishes patient outcome. Differentiated embryo-chondrocyte expressed gene 1 (DEC1) has been described as novel hypoxia-related tissue factor. In our study, we assessed the expression of DEC1 in 1p aberrant oligodendroglial neoplasms and its association with necrosis and expression of hypoxia-inducible factor 1alpha (HIF-1alpha), carbonic anhydrase-9 (CA9), and vascular endothelial growth factor-mRNA (VEGF).
  
  
  
  44 primary and 16 recurrent oligodendroglial neoplasms with 1p-aberrations were investigated immunohistochemically for the expression of DEC1, HIF-1alpha, and CA9. Expression of VEGF was investigated using in situ hybridization. DEC1 expression was correlated with necrosis and with expression of HIF-1alpha, CA9, and VEGF.
  
  
  
  DEC1 was expressed in tumor cell nuclei, and occasionally in nuclei of endothelial cells, and glial and neuronal cells of surrounding brain tissue. High expression (>10% of tumor cells immunolabeled) of DEC1 was found in 56 cases, low expression (<10% of tumor cells immunolabeled) was found in 3 cases. In 1 case no expression of DEC1 was evident. DEC1 expression showed no topographical association with necrosis or expression of HIF-1alpha, CA9, or VEGF.
  
  
  
  DEC1 expression is found in the majority of 1p-aberrant oligodendroglial neoplasms and does not correlate with necrosis or expression of HIF-1alpha, CA9, VEGF. Thus, immunohistochemical analysis of DEC1 expression is in our hands not suitable for detection of tissue hypoxia in this type of primary brain tumor.
authors.affiliation: Institute of Neurology, Medical University Vienna, Austria.
authors.forename: M
authors.initials: M
authors.lastname: Preusser
authors.forename: P
authors.initials: P
authors.lastname: Birner
authors.forename: I M
authors.initials: IM
authors.lastname: Ambros
authors.forename: P F
authors.initials: PF
authors.lastname: Ambros
authors.forename: H
authors.initials: H
authors.lastname: Budka
authors.forename: A L
authors.initials: AL
authors.lastname: Harris
authors.forename: J A
authors.initials: JA
authors.lastname: Hainfellner
mesh_terms: D000328:Adult; D015415:Biomarkers; D002878:Chromosomes, Human, Pair 1 / Q000235:genetics*; D005260:Female; D006801:Humans; D000860:Hypoxia / Q000175:diagnosis / Q000235:genetics / Q000473:pathology; D051795:Hypoxia-Inducible Factor 1, alpha Subunit / Q000378:metabolism; D007150:Immunohistochemistry; D008297:Male; D009336:Necrosis; D009837:Oligodendroglioma / Q000235:genetics* / Q000378:metabolism* / Q000473:pathology; D012333:RNA, Messenger / Q000378:metabolism; D025521:Tumor Suppressor Proteins / Q000096:biosynthesis* / Q000235:genetics*; D042461:Vascular Endothelial Growth Factor A / Q000096:biosynthesis / Q000235:genetics
chemical_list: D015415:Biomarkers; C403671:DELEC1 protein, human; C497442:HIF1A protein, human; D051795:Hypoxia-Inducible Factor 1, alpha Subunit; D012333:RNA, Messenger; D025521:Tumor Suppressor Proteins; D042461:Vascular Endothelial Growth Factor A