

VEGF is one of the most potent and predominant, known pro-angiogenic factors and is both present and stable throughout the tumour life cycle. Preclinical evidence supports maintaining direct and continuous VEGF suppression over time. As tumours develop, continued VEGF suppression is thought to provide important ongoing antivascular effects that may inhibit further growth and spread of tumour cells. Therefore, one area of anti-angiogenesis research that is being pursued is the strategy of maintaining precise VEGF inhibition as tumours progress and supplementing it with selective targeting of other emergent pathways.