Bevacizumab is a humanized monoclonal antibody (mAb) targeting vascular endothelial growth factor (VEGF), which causes excessive growth of new blood vessels from pre-existing ones in the form of angiogenesis, underlying pathology of cancers and intraocular neovascular diseases. Through binding to soluble VEGF, bevacizumab sterically blocks the interaction of VEGF with VEGF receptor 2 on endothelial cells and thereby interrupts the activation of downstream signalling for angiogenesis. Bevacizumab is indicated for the treatment of a range of cancers, including metastatic colorectal cancer, metastatic breast cancer and non-small-cell lung cancer. It is also used for off-label treatment of eye diseases including neovascular age-related macular degeneration and diabetic macular oedema.
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