ABT-510 is synthetic peptide that mimics the anti-angiogenic activity of the endogenous protein thrombospondin-1 (TSP-1). ABT-510 inhibits the actions of several pro-angiogenic growthfactors important to tumor neovascularization; these pro-angiogenic growthfactors include vascular endothelial growthfactor (VEGF), basic fibroblastgrowthfactor (bFGF)), hepatocyte growthfactor (HGF), and interleukin 8 (IL-8).