The approval by the Food and Drug Administration of bevacizumab,a humanized monoclonal antibody against vascular endothelialgrowth factor (VEGF),1 sparked enormous excitement among oncologists.Bevacizumab, the first cancer therapy that acts by blockingangiogenesis, is the result of the successful translation ofpioneering work by the late Judah Folkman and his colleagues,who proposed that vascularization is essential for the growthof clinically relevant invasive carcinomas. A recent study byFischer and colleagues2 indicates that a monoclonal antibodyagainst another angiogenic protein, placental growth factor(PlGF), may also be a useful antiangiogenic therapy for cancerin humans.
From Johns Hopkins University School of Medicine, Baltimore.
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