RESUMEN
BACKGROUND: Endothelial malignancies, such as angiosarcoma and hemangioendothelioma, are often resistant to chemotherapy and surgery, and may result in death. Improved means of therapy are needed for these disorders. OBJECTIVE: We wanted to determine whether angiosarcoma can be treated with angiogenesis inhibitors in mice. METHODS: Mice were inoculated with a cell line that gives rise to angiosarcoma and were treated with the angiogenesis inhibitors 2-methoxyestradiol and TNP-470. Response to therapy was monitored by measurement of tumors. RESULTS: TNP-470 caused an 84% reduction in tumor size, and 2-methoxyestradiol caused a 68% reduction in tumor size. CONCLUSION: Angiogenesis inhibitors are highly effective in treatment of angiosarcoma in mice. Clinical trials of these agents in humans with angiosarcoma and hemangioendothelioma are warranted.