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PMID: 15607960 Published · ppublish English Journal Article Research Support, Non-U.S. Gov't

Kinetics of vascular normalization by VEGFR2 blockade governs brain tumor response to radiation: role of oxygenation, angiopoietin-1, and matrix metalloproteinases.

Cancer cell ·Vol. 6 ·No. 6 ·2004-12-00 ·Pages 553-63

Winkler F, Kozin SV, Tong RT, Chae SS, Booth MF, Garkavtsev I, Xu L, Hicklin DJ, Fukumura D, di Tomaso E, Munn LL, Jain RK

Abstract

The recent landmark Phase III clinical trial with a VEGF-specific antibody suggests that antiangiogenic therapy must be combined with cytotoxic therapy for the treatment of solid tumors. However, there are no guidelines for optimal scheduling of these therapies. Here we show that VEGFR2 blockade creates a "normalization window"--a period during which combined radiation therapy gives the best outcome. This window is characterized by an increase in tumor oxygenation, which is known to enhance radiation response. During the normalization window, but not before or after it, VEGFR2 blockade increases pericyte coverage of brain tumor vessels via upregulation of Ang1 and degrades their pathologically thick basement membrane via MMP activation.

MeSH Terms
Angiogenesis Inhibitors/therapeutic use Angiopoietin-1/physiology Animals Antibodies, Monoclonal/pharmacology,therapeutic use Antigens/analysis Apoptosis/drug effects,radiation effects Basement Membrane/drug effects,metabolism,pathology Blood Vessels/chemistry,drug effects,radiation effects Blotting, Western Brain Neoplasms/drug therapy,metabolism,radiotherapy Cell Line, Tumor Cell Movement/drug effects Collagen Type IV/analysis,genetics,metabolism Combined Modality Therapy/methods Dipeptides/pharmacology Ephrin-B2/genetics Fluorescein Angiography Gamma Rays/therapeutic use Gene Expression Regulation, Neoplastic/drug effects Glioma/drug therapy,metabolism,radiotherapy Humans Immunohistochemistry Male Matrix Metalloproteinase Inhibitors Matrix Metalloproteinases/metabolism Mice Mice, Nude Models, Biological Neovascularization, Pathologic/drug therapy,radiotherapy Oligonucleotide Array Sequence Analysis Oxygen/metabolism Pericytes/chemistry,cytology,physiology Proteoglycans/analysis Receptor, TIE-2/antagonists & inhibitors,immunology Time Factors Transfection Up-Regulation/genetics Vascular Endothelial Growth Factor Receptor-2/antagonists & inhibitors,immunology,metabolism Xenograft Model Antitumor Assays
Chemicals
Angiogenesis Inhibitors Angiopoietin-1 Antibodies, Monoclonal Antigens Collagen Type IV Dipeptides Ephrin-B2 Matrix Metalloproteinase Inhibitors N-(2(R)-2-(hydroxamidocarbonylmethyl)-4-methylpentanoyl)-L-tryptophan methylamide Proteoglycans chondroitin sulfate proteoglycan 4 Receptor, TIE-2 Vascular Endothelial Growth Factor Receptor-2 Matrix Metalloproteinases Oxygen
Authors & Affiliations
12 authors, click to expand affiliations / ORCID
Winkler Frank
E.L. Steele Laboratory for Tumor Biology, Department of Radiation Oncology, Massachusetts General Hospital and Harvard Medical School, 100 Blossom Street, Boston, MA 02114, USA.
Kozin Sergey V
Tong Ricky T
Chae Sung-Suk
Booth Michael F
Garkavtsev Igor
Xu Lei
Hicklin Daniel J
Fukumura Dai
di Tomaso Emmanuelle
Munn Lance L
Jain Rakesh K
Article Info
Journal
Cancer cell
Abbr.
Cancer Cell
ISSN
1535-6108
Published
2004-12-00
Pages
553-63
Language
English
Region
United States
NLM ID
101130617
Subset
IM
Grants
NCI NIH HHS · P01 CA080124 · United States
Corrections
CommentIn
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