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Erschienen in: Journal of Neuro-Oncology 1/2011

01.03.2011 | Laboratory Investigation - Human/Animal Tissue

Epo is involved in angiogenesis in human glioma

verfasst von: Beatrice Nico, Tiziana Annese, Diego Guidolin, Nicoletta Finato, Enrico Crivellato, Domenico Ribatti

Erschienen in: Journal of Neuro-Oncology | Ausgabe 1/2011

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Abstract

In this study, the extent of angiogenesis, evaluated as microvascular density, and the immunoreactivity of tumor cells to erythropoietin (Epo) and of endothelial cells to Epo receptor (EpoR) have been correlated in human glioma specimens, and the effect of anti-Epo antibody on glioma-induced angiogenesis in vivo in the chick embryo chorioallantoic membrane (CAM) has been investigated. Results show that: (1) Epo/EpoR expression correlates with angiogenesis, (2) in the CAM assay, tumor bioptic specimens induce a strong angiogenic response, comparable to that induced by VEGF, and (3) an anti-Epo antibody co-administered with tumor bioptic specimens significantly inhibits the angiogenic response. These findings suggest the presence of a loop in the Epo/EpoR system, i.e. Epo is secreted by glioma tumor cells and it affects glioma vascular endothelial cells via its receptor and promotes angiogenesis in a paracrine manner. Moreover, as demonstrated by in vivo experiments, Epo is responsible for the strong angiogenic response induced by human glioma bioptic specimens, because an anti-Epo antibody is able to significantly inhibit this response.
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Metadaten
Titel
Epo is involved in angiogenesis in human glioma
verfasst von
Beatrice Nico
Tiziana Annese
Diego Guidolin
Nicoletta Finato
Enrico Crivellato
Domenico Ribatti
Publikationsdatum
01.03.2011
Verlag
Springer US
Erschienen in
Journal of Neuro-Oncology / Ausgabe 1/2011
Print ISSN: 0167-594X
Elektronische ISSN: 1573-7373
DOI
https://doi.org/10.1007/s11060-010-0294-6

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