title: Differential distribution of erbB receptors in human glioblastoma multiforme: expression of erbB3 in CD133-positive putative cancer stem cells.
abstract: Glioblastomas are the most common primary central nervous system tumors in adults, and they remain resistant to current treatments. erbB1 signaling is frequently altered in glioblastomas, suggesting thaterbB receptor family members may represent targets for molecular therapy. We performed a comprehensive analysis of erbB receptor and ligand expression profiles in a panel of 9 glioblastomas andcompared them to nonneoplastic cerebral tissue containing neocortex and adjacent white matter. Quantitative reverse transcription-polymerase chain reaction and Western blot analysis showed that erbB1signaling and erbB2 receptors exhibited highly variable deregulation profiles in the tumors, with patterns ranging from underexpression to overexpression; in contrast, erbB3 and erbB4 were downregulated. We next performed immunohistochemistry to determinethe distribution patterns of erbB receptors among the main neuralcell types in the tumors with special reference to the putative tumor stem cell population. Results revealed intertumoral and intratumoral heterogeneity in all 4 erbB expression profiles, but each receptor exhibited a distinct distribution pattern among glial fibrillary acidic protein-, Olig2-, NeuN-, and CD133-positive populations. Although erbB1 immunoreactivity was detected in only small subsets of CD133-positive putative tumor stem cells, erbB3 immunoreactivity was prominent in this population, suggesting that erbB3 may represent a new potential therapeutic target.
authors.affiliation: Inserm U837, Bâtiment Biserte, Place de Verdun, 59045 Lille Cedex, France.
authors.forename: Véronique
authors.initials: V
authors.lastname: Duhem-Tonnelle
authors.forename: Ivan
authors.initials: I
authors.lastname: Bièche
authors.forename: Sophie
authors.initials: S
authors.lastname: Vacher
authors.forename: Anne
authors.initials: A
authors.lastname: Loyens
authors.forename: Claude-Alain
authors.initials: CA
authors.lastname: Maurage
authors.forename: Francis
authors.initials: F
authors.lastname: Collier
authors.forename: Marc
authors.initials: M
authors.lastname: Baroncini
authors.forename: Serge
authors.initials: S
authors.lastname: Blond
authors.forename: Vincent
authors.initials: V
authors.lastname: Prevot
authors.forename: Ariane
authors.initials: A
authors.lastname: Sharif
mesh_terms: D000071916:AC133 Antigen; D000293:Adolescent; D000328:Adult; D000368:Aged; D015703:Antigens, CD / Q000378:metabolism; D015153:Blotting, Western; D001932:Brain Neoplasms / Q000235:genetics / Q000378:metabolism*; D002478:Cells, Cultured; D002540:Cerebral Cortex / Q000378:metabolism*; D066246:ErbB Receptors / Q000235:genetics / Q000378:metabolism; D005260:Female; D005455:Fluorescent Antibody Technique; D015972:Gene Expression Regulation, Neoplastic; D005904:Glial Fibrillary Acidic Protein / Q000235:genetics / Q000378:metabolism; D005909:Glioblastoma / Q000235:genetics / Q000378:metabolism*; D006023:Glycoproteins / Q000378:metabolism; D006801:Humans; D008297:Male; D008875:Middle Aged; D014411:Neoplastic Stem Cells; D010455:Peptides / Q000378:metabolism; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D018719:Erb-b2 Receptor Tyrosine Kinases / Q000235:genetics / Q000378:metabolism; D020893:Receptor, ErbB-3 / Q000235:genetics / Q000378:metabolism*; D012044:Regression Analysis; D020133:Reverse Transcriptase Polymerase Chain Reaction
chemical_list: D000071916:AC133 Antigen; D015703:Antigens, CD; D066246:ErbB Receptors; D005904:Glial Fibrillary Acidic Protein; D006023:Glycoproteins; D010455:Peptides; D012333:RNA, Messenger; D018719:Erb-b2 Receptor Tyrosine Kinases; D020893:Receptor, ErbB-3; C000606023:PROM1 protein, human
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