Volume 119, Issue 12 pp. 2795-2802
Cancer Cell Biology

Inhibition of carcinoma cell-derived VEGF reduces inflammatory characteristics in xenograft carcinoma

Alexei V. Salnikov

Alexei V. Salnikov

Department of Medical Biochemistry and Microbiology, Uppsala University, Uppsala, Sweden

Department of Oncology, Clinical Sciences Lund, Lund University, Lund, Sweden

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Nils-Erik Heldin

Nils-Erik Heldin

Department of Genetics and Pathology, Uppsala University Hospital, Rudbeck Laboratory, Uppsala, Sweden

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Linda B. Stuhr

Linda B. Stuhr

Department of Biomedicine, University of Bergen, Bergen, Norway

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Helge Wiig

Helge Wiig

Department of Biomedicine, University of Bergen, Bergen, Norway

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Hanspeter Gerber

Hanspeter Gerber

Department of Molecular Oncology, Genentech, South San Francisco, CA

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Rolf K. Reed

Rolf K. Reed

Department of Biomedicine, University of Bergen, Bergen, Norway

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Kristofer Rubin

Corresponding Author

Kristofer Rubin

Department of Medical Biochemistry and Microbiology, Uppsala University, Uppsala, Sweden

Fax: +46-18-471-4975

Department of Medical Biochemistry and Microbiology, University of Uppsala, BMC, Box 582, SE-751 23 Uppsala, SwedenSearch for more papers by this author
First published: 26 October 2006
Citations: 54

Abstract

The stroma of carcinomas shares several characteristics with inflamed tissues including a distorted vasculature, active angiogenesis and macrophage infiltration. In addition, the tumor interstitial fluid pressure (PIF) of the stroma is pathologically elevated. We show here that bevacizumab [rhuMab vascular endothelial growth factor (VEGF), Avastin], a monoclonal antibody to VEGF, at a dose of 5 mg/kg modulated inflammation in KAT-4 xenograft human anaplastic thyroid carcinoma tissue. At this dose, bevacizumab reduced the density of macrophages, MHC class II antigen expression by macrophages and IL-1β mRNA expression. Furthermore, bevacizumab lowered tumor extracellular fluid volume, plasma protein leakage from tumor vessels, the number of CD31-positive structures and tumor PIF. The tumor plasma volume and the number of α-smooth muscle actin-positive vessels, however, remained unchanged. Our data suggest that carcinoma cell-derived VEGF either directly or indirectly participates in maintaining an inflammatory microenvironment in experimental KAT-4 carcinoma. Furthermore, our data indicate that the reduction of inflammation resulting in reduced vascular permeability and decrease in the tumor extracellular fluid volume by bevacizumab contributes to reduced tumor PIF. © 2006 Wiley-Liss, Inc.

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