Description
Recombinant Human VEGF-A. Vascular endothelial growth factor alpha forms a homodimer and is a potent stimulator of angiogenesis of both normal and cancerous cells. It acts as a regulator of vasculogenesis, angiogenesis and endothelial cell growth. VEGF-A is secreted by many different cell types such as endothelial cells (Nissen et al. 1998), smooth muscle cells (Brogi et al. 1994), neutrophils (Gaudry et al. 1997), platelets (Banks et al. 1998), macrophages and 60% of all tumours (Berse et al. 1992). The sequence of this recombinant protein product is amino acid (aa) 27-aa 141 + CDKPRR but deficient from aa 142-226, and it is closest to isoform 121. Isoform 121 and 111 lack exons 6 and 7, and for this reason neither of these isoforms bind to the extracellular matrix (Krilleke et al. 2017). This product has been demonstrated for use, in a pharmacokinetic (PK) antigen capture ELISA with the monoclonal antibody drugs ranibizumab and bevacizumab using anti-ranibizumab antibodies for detection