NCIt synonyms : Immunoglobulin G1, Anti-(Human Vascular Endothelial Growth Factor) Fab Fragment (Human-Mouse
Monoclonal rhuFab V2 Gamma1 Chain), Disulfide With Human-Mouse Monoclonal rhuFab V2
Light Chain;
NCIt definition : A second-generation, recombinant humanized IgG1 kappa monoclonal antibody fragment
directed against human vascular endothelial growth factor (VEGF) alpha. Ranibizumab
binds to VEGF alpha and inhibits VEGF alpha binding to its receptors, VEGFR1 and VEGFR2,
thereby preventing the growth and maintenance of tumor blood vessels. The molecular
weight of this agent (48 kD) is much smaller than the molecular weight of bevacizumab
(MW 149 kD), allowing complete penetration of the retina and the subretinal space
following intravitreal injection. In contrast to other anti-VEGF aptamers such as
pegaptanib, ranibizumab has a high specificity and affinity for all soluble human
isoforms of VEGF.;