Media type: E-Article Title: Inhibition of HIF Prolyl Hydroxylase-2 Blocks Tumor Growth in Mice through the Antiproliferative Activity of TGFβ Contributor: Ameln, Anne Klotzsche-von; Muschter, Antje; Mamlouk, Soulafa; Kalucka, Joanna; Prade, Ina; Franke, Kristin; Rezaei, Maryam; Poitz, David M.; Breier, Georg; Wielockx, Ben Published: American Association for Cancer Research (AACR), 2011 Published in: Cancer Research, 71 (2011) 9, Seite 3306-3316 Language: English DOI: 10.1158/0008-5472.can-10-3838 ISSN: 0008-5472; 1538-7445 Origination: Footnote: Description: Abstract Virtually all solid tumors are dependent on a vascular network to provide them with the right amount of nutrients and oxygen. In that sense, low oxygen tension or hypoxia leads to an adaptive response that is transcriptionally regulated by the hypoxia-inducible factors (HIF), which are tightly controlled by the HIF prolyl hydroxylases (PHD). In this study, we show that inhibition of the oxygen sensor PHD2 in tumor cells stimulates vessel formation but paradoxically results in a profound reduction of tumor growth. This effect relies on the antiproliferative nature of the TGFβ signaling pathway, in a largely HIF-independent manner. Moreover, our findings reveal that PHD2 has an essential function in controlling the dual nature of TGFβ during tumorigenesis and may offer an alternative opportunity for anticancer therapy. Cancer Res; 71(9); 3306–16. ©2011 AACR. Access State: Open Access