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 language | English |
|---|---|
| Pages (from-to) | 51-58 |
| Number of pages | 8 |
| Journal | Journal of Neuro-Oncology |
| Volume | 102 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 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
Epo is involved in angiogenesis in human glioma. / Nico, Beatrice; Annese, Tiziana; Guidolin, Diego; Finato, Nicoletta; Crivellato, Enrico; Ribatti, Domenico.
In: Journal of Neuro-Oncology, Vol. 102, No. 1, 03.2011, p. 51-58.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Epo is involved in angiogenesis in human glioma
AU - Nico, Beatrice
AU - Annese, Tiziana
AU - Guidolin, Diego
AU - Finato, Nicoletta
AU - Crivellato, Enrico
AU - Ribatti, Domenico
PY - 2011/3
Y1 - 2011/3
N2 - 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.
AB - 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.
KW - Angiogenesis
KW - Chorioallantoic membrane
KW - Epo
KW - EpoR
KW - Human glioma
UR - http://www.scopus.com/inward/record.url?scp=79952188040&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79952188040&partnerID=8YFLogxK
U2 - 10.1007/s11060-010-0294-6
DO - 10.1007/s11060-010-0294-6
M3 - Article
C2 - 20614229
AN - SCOPUS:79952188040
VL - 102
SP - 51
EP - 58
JO - Journal of Neuro-Oncology
JF - Journal of Neuro-Oncology
SN - 0167-594X
IS - 1
ER -