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Related Collections Hemostasis, Thrombosis, and Vascular Biology Social Bookmarking                   What's this?  Previous Article  |  Table of Contents  |  Next Article  Blood, 1 August 2002, Vol. 100, No. 3, pp. 905-911 HEMOSTASIS, THROMBOSIS, AND VASCULAR BIOLOGY A monoclonal antibody to vascular endothelial-cadherin inhibits tumor angiogenesis without side effects on endothelial permeability Monica Corada, Lucia Zanetta, Fabrizio Orsenigo, Ferruccio Breviario, Maria Grazia Lampugnani, Sergio Bernasconi, Fang Liao, Daniel J. Hicklin, Peter Bohlen, and Elisabetta Dejana From the FIRC Institute of Molecular Oncology, Milan, Italy; Mario Negri Institute for Pharmacological Research, Milan, Italy; Universitá degli Studi dell'Insubria, Dipartimento di Scienze Cliniche e Biologiche, Facoltá di Medicina e Chirurgia, Varese, Italy; Department of Immunology, ImClone Systems Incorporated, New York, NY. Vascular endothelial cadherin (VE-cadherin) is an endothelial-specific, trans-membrane protein that promotes homophilic cell adhesion. Inhibition of VE-cadherin by the blocking monoclonal antibody (mAb) BV13 inhibited angiogenesis and tumor growth in vivo. However, this effect was accompanied by a marked increase in lung and heart permeability. In the present paper, we characterize a different VE-cadherin mAb (BV14) that is able to inhibit angiogenesis without affecting vascular permeability. In vitro studies show that BV14, in contrast to BV13, did not increase paracellular permeability of endothelial monolayers and did not disrupt VE-cadherin clusters at junctions. However, both antibodies could inhibit formation of vascularlike structures in collagen gels and increase migration of endothelial cells into wounded areas. In vivo, BV14 and BV13 were equally active in inhibiting angiogenesis in the mouse cornea and in reducing the growth of hemangioma and C6 glioma. In contrast to BV13, BV14 did not change vascular permeability in all the organs tested and at any dose used. BV14 and BV13 bind to VE-cadherin extracellular repeats EC4 and EC1, respectively. We propose that, in resting vessels, where junctions are stable and well-structured, antibody binding to EC1 but not EC4 disrupts their organization and increases permeability. In contrast, in growing vessels, where endothelial cells are migrating and junctions are weaker, antibody binding to EC4 may be sufficient to disrupt cell-to-cell adhesion and inhibit assembly of new vascular structures. © 2002 by The American Society of Hematology.   CiteULike    Connotea    Del.icio.us    Digg    Reddit    Technorati    What's this? This article has been cited by other articles: G. Berx and F. van Roy Involvement of Members of the Cadherin Superfamily in Cancer Cold Spring Harb Perspect Biol, December 1, 2009; 1(6): a003129 - a003129. [Abstract] [Full Text] [PDF] D. Navaratna, J. Maestas, P. G. 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