Bevacizumab (BEV)
Bevacizumab is a monoclonal antibody that inhibits angiogenesis by clearing circulating VEGF, resulting in a decline in the contrast-enhancing tumor, which does not always correlate with treatment response.
Bevacizumab, as antibodies, were applied to inhibit tumor angiogenesis by preventing activation of vascular endothelial growth factor receptor.
Bevacizumab, is sold under the trade name Avastin (Genentech/ Roche, South San Francisco, California).
Indications
Bevacizumab for diffuse intrinsic pontine glioma
Meningioma
Neurofibromatosis type 2
Radiation induced necrosis
Radiation induced necrosis in the brain has been treated using bevacizumab.
Perez-Torres et al. validated the VEGF specificity by comparing the therapeutic efficacy of anti-VEGF with non-specific isotype control antibody. Additionally, they found that VEGF over-expression and radionecrosis developed simultaneously, which precludes preventative anti-VEGF treatment 1).
Resistance
Combining VEGF blockade with inhibition of Angiopoietin 2 may potentially overcome resistance to bevacizumab therapy 2).