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Isolation and characterisation of vascular endothelial growth factor-165 specific scFv fragments by phage display

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Vascular endothelial growth factor (VEGF) is a multifunctional cytokine which plays a major role in angiogenesis. Alternative splicing causes the production of several different isoforms (VEGF-A 121, 145, 165, 189, 206). VEGF is essential for tumor angiogenesis and several studies have correlated elevated VEGF levels with tumor stage, metastases and progression. Antibody phage display was employed to isolate two scFv antibody fragments, D8 and F10, with specificity for the VEGF165 isoform. It was shown by ELISA and competitive immunohistochemistry that each clone bound to VEGF165 but not VEGF121. Immunohistochemistry with D8 and F10 on colorectal carcinoma and adenoma sections revealed positive staining similar to that shown by a polyclonal VEGF antibody. The scFv antibody fragments, D8 and F10, will be useful in specifically detecting circulating VEGF165 in cancer patients as most studies to date have quantified the total level of circulating VEGF (121 and 165). These reagents will allow further elucidation of the role of VEGF in tumor angiogenesis.
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Document Type: Research Article

Affiliations: Department of Surgery, Medical Research Laboratory, Wolfson Building, University of Hull, Hull, HU6 7RX, UK

Publication date: February 1, 2003

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  • The International Journal of Oncology provides an international forum for the publication of the latest, cutting-edge research in the broad area of oncology and cancer treatment. The journal accepts original high quality works and reviews on all aspects of oncology research including carcinogenesis, metastasis, epidemiology, chemotherapy and viral oncology. Through fair and efficient peer review, the journal is dedicated to publishing top tier research in the field, offering authors rapid publication as well as high standards of copy-editing and production. The International Journal of Oncology is published on a monthly basis in both print and early online.
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