Epo is involved in angiogenesis in human glioma

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

Research output: Contribution to journalArticle

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.

Original languageEnglish
Pages (from-to)51-58
Number of pages8
JournalJournal of Neuro-Oncology
Volume102
Issue number1
DOIs
Publication statusPublished - Mar 2011

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Keywords

  • Angiogenesis
  • Chorioallantoic membrane
  • Epo
  • EpoR
  • Human glioma

ASJC Scopus subject areas

  • Clinical Neurology
  • Cancer Research
  • Oncology
  • Neurology

Cite this

Nico, B., Annese, T., Guidolin, D., Finato, N., Crivellato, E., & Ribatti, D. (2011). Epo is involved in angiogenesis in human glioma. Journal of Neuro-Oncology, 102(1), 51-58. https://doi.org/10.1007/s11060-010-0294-6