Abstract:
:Vascular endothelial growth factor (VEGF) is an essential regulator of normal and abnormal blood vessel growth. A monoclonal antibody (mAb) that targets VEGF suppresses tumor growth in murine cancer models and human patients. We investigated cellular and molecular events that mediate refractoriness of tumors to anti-angiogenic therapy. Inherent anti-VEGF refractoriness is associated with infiltration of the tumor tissue by CD11b+Gr1+ myeloid cells. Recruitment of these myeloid cells is also sufficient to confer refractoriness. Combining anti-VEGF treatment with a mAb that targets myeloid cells inhibits growth of refractory tumors more effectively than anti-VEGF alone. Gene expression analysis in CD11b+Gr1+ cells isolated from the bone marrow of mice bearing refractory tumors reveals higher expression of a distinct set of genes known to be implicated in active mobilization and recruitment of myeloid cells. These findings indicate that, in our models, refractoriness to anti-VEGF treatment is determined by the ability of tumors to prime and recruit CD11b+Gr1+ cells.
journal_name
Nat Biotechnoljournal_title
Nature biotechnologyauthors
Shojaei F,Wu X,Malik AK,Zhong C,Baldwin ME,Schanz S,Fuh G,Gerber HP,Ferrara Ndoi
10.1038/nbt1323subject
Has Abstractpub_date
2007-08-01 00:00:00pages
911-20issue
8eissn
1087-0156issn
1546-1696pii
nbt1323journal_volume
25pub_type
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