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    Targeting of adenovirus to endothelial cells by a bispecific single-chain diabody directed against the adenovirus fiber knob domain and human endoglin (CD105).

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    Authors
    Nettelbeck, Dirk M
    Miller, Daniel W
    Jérôme, Valerie
    Zuzarte, Marylou
    Watkins, Sarah J
    Hawkins, Robert E
    Muller, Rolf
    Kontermann, Roland E
    Affiliation
    Institut für Molekularbiologie und Tumorforschung, Philipps-Universität Marburg, Emil-Mannkopff-Strabetae 2, Marburg, D-35033, Germany.
    Issue Date
    2001-06
    
    Metadata
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    Abstract
    The use of adenoviruses for antivascular cancer gene therapy is limited by their low transduction efficiency for endothelial cells. We have developed a recombinant bispecific antibody as a molecular bridge, linking the adenovirus capsid to the endothelial cell surface protein endoglin, for vascular targeting of adenoviruses. Endoglin (CD105), a component of the transforming growth factor beta receptor complex, represents a promising target for antivascular cancer therapy. Endoglin is expressed predominantly on endothelial cells and is upregulated in angiogenic areas of tumors. We isolated single-chain Fv fragments directed against human endoglin from a human semisynthetic antibody library. One of the isolated scFv fragments (scFv C4) bound specifically to various proliferating primary endothelial cells or cell lines including HUVEC, HDMEC, HMVEC, and HMEC. ScFv C4 was therefore used to construct a bispecific single-chain diabody directed against endoglin and the adenovirus fiber knob domain (scDb EDG-Ad). This bispecific molecule mediated enhanced and selective adenovirus transduction of HUVECs, which was independent from binding to the coxsackievirus and adenovirus receptor (CAR) and alpha(v)-integrins. Thus, adenovirus infection was redirected to a new cellular receptor (CD105) and cell entry pathway. These results demonstrate the utility of bispecific single-chain diabodies, which can be produced in large quantities in bacteria, for the retargeting of adenoviruses in cancer gene therapy.
    Citation
    Targeting of adenovirus to endothelial cells by a bispecific single-chain diabody directed against the adenovirus fiber knob domain and human endoglin (CD105). 2001, 3 (6):882-91 Mol. Ther.
    Journal
    Molecular Therapy
    URI
    http://hdl.handle.net/10541/85721
    DOI
    10.1006/mthe.2001.0342
    PubMed ID
    11407902
    Type
    Article
    Language
    en
    ISSN
    1525-0016
    ae974a485f413a2113503eed53cd6c53
    10.1006/mthe.2001.0342
    Scopus Count
    Collections
    All Paterson Institute for Cancer Research

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