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Grunewald, T.G.* ; Diebold, I.* ; Esposito, I. ; Plehm, S.* ; Hauer, K.* ; Thiel, U.* ; Da Silva-Buttkus, P. ; Neff, F. ; Unland, R.* ; Müller-Tidow, C.* ; Zobywalski, C.* ; Lohrig, K.* ; Lewandrowski, U.* ; Sickmann, A.* ; da Costa, O.P.* ; Görlach, A.* ; Cossarizza, A.* ; Butt, E.* ; Richter, G.H.* ; Burdach, S.*

STEAP1 is associated with the invasive and oxidative stress phenotype of Ewing tumors.

Mol. Cancer Res. 10, 52-65 (2012)
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Ewing tumors comprise the second most common type of bone-associated cancer in children and are characterized by oncogenic EWS/FLI1 fusion proteins and early metastasis. Compelling evidence suggests that elevated levels of intracellular oxidative stress contribute to enhanced aggressiveness of numerous cancers, possibly including Ewing tumors. Using comprehensive microarray analyses and RNA interference, we identified the six-transmembrane epithelial antigen of the prostate 1 (STEAP1)-a membrane-bound mesenchymal stem cell marker of unknown function-as a highly expressed protein in Ewing tumors compared with benign tissues and show its regulation by EWS/FLI1. In addition, we show that STEAP1 knockdown reduces Ewing tumor proliferation, anchorage-independent colony formation as well as invasion in vitro and decreases growth and metastasis of Ewing tumor xenografts in vivo. Moreover, transcriptome and proteome analyses as well as functional studies revealed that STEAP1 expression correlates with oxidative stress responses and elevated levels of reactive oxygen species that in turn are able to regulate redox-sensitive and proinvasive genes. In synopsis, our data suggest that STEAP1 is associated with the invasive behavior and oxidative stress phenotype of Ewing tumors and point to a hitherto unanticipated oncogenic function of STEAP1.
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Publikationstyp Artikel: Journalartikel
Dokumenttyp Wissenschaftlicher Artikel
Schlagwörter 6-transmembrane epithelial antigen; Influences zyxin loccalization; Reactive oxygen; Endoplasmic; C-reticulum; Hydrogen-peroxide; Familiy tumors; Cancer Cells; Expression; Profileration; Prostate
Sprache englisch
Veröffentlichungsjahr 2012
HGF-Berichtsjahr 2012
ISSN (print) / ISBN 1541-7786
e-ISSN 1557-3125
Zeitschrift Molecular Cancer Research
Quellenangaben Band: 10, Heft: 1, Seiten: 52-65 Artikelnummer: , Supplement: ,
Verlag American Association for Cancer Research (AACR)
Begutachtungsstatus Peer reviewed
Institut(e) Institute of Pathology (PATH)
POF Topic(s) 30504 - Mechanisms of Genetic and Environmental Influences on Health and Disease
Forschungsfeld(er) Enabling and Novel Technologies
PSP-Element(e) G-500300-001
DOI 10.1158/1541-7786.MCR-11-0524
Scopus ID 84856006864
Erfassungsdatum 2012-02-27
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