Generation and characterization of a functional Nanobody against the vascular endothelial growth factor receptor-2; angiogenesis cell receptor.

Mahdi Behdani (1) , Sirous Zeinali (1) , Hossein Khanahmad (1) , Morteza Karimipour (1) , Nader Asadzadeh (2) , Keyhan Azadmanesh (3) , Alireza Khabiri (1) , Steve Schoonooghe (4) , Mahdi Habibi Anbouhi (1) , Gholamreza Hassanzadeh-Ghassabeh (4) , Serge Muyldermans (4)

1 Biotechnology Research Center
2 Department of Animal Breeding and Genetics
3 Institut Pasteur d'Iran
4 VUB - Vrije Universiteit Brussel

Vascular endothelial growth factor receptor-2 (VEGFR2) is an important tumor-associated receptor and blockade of the VEGF receptor signaling can lead to the inhibition of neovascularization and tumor metastasis. Nanobodies are the smallest intact antigen binding fragments derived from heavy chain-only antibodies occurring in camelids. Here, we describe the identification of a VEGFR2-specific Nanobody, named 3VGR19, from dromedaries immunized with a cell line expressing high levels of VEGFR2. We demonstrate by FACS, that 3VGR19 Nanobody specifically binds VEGFR2 on the surface of 293KDR and HUVECs cells. Furthermore, the 3VGR19 Nanobody potently inhibits formation of capillary-like structures. These data show the potential of Nanobodies for the blockade of VEGFR2 signaling and provide a basis for the development of novel cancer therapeutics.

Keywords: VEGFR2; Nanobody; Angiogenesis

Domains: Life Sciences [q-bio]; Genetics

Mahdi Behdani, Sirous Zeinali, Hossein Khanahmad, Morteza Karimipour, Nader Asadzadeh, et al.. Generation and characterization of a functional Nanobody against the vascular endothelial growth factor receptor-2; angiogenesis cell receptor.. Molecular Immunology, 2012, 50 (1-2), pp.35-41. ⟨10.1016/j.molimm.2011.11.013⟩. ⟨pasteur-00820543⟩