Described here are methods and compositions for treating tumors and metastases that improve anti-angiogenesis therapy. By inhibiting these mechanisms in a biological system with an anti-beta one integrin composition in combination with an antiangiogenic composition, tumors and metastases may be deprived of an adequate blood supply, thereby resulting in tumor cell growth arrest and possibly regression, including tumor cell death. The present compositions comprise an anti-beta one integrin agent in combination with an anti-VEGF agent, in a pharmaceutical composition or compositions. Methods of treatment and of imaging are also described.
