RESUMEN
Angiopoietin-2 (Ang2) exhibits broad expression in the remodeling vasculature of human tumors but very limited expression in normal tissues, making it an attractive candidate target for antiangiogenic cancer therapy. To investigate the functional consequences of blocking Ang2 activity, we generated antibodies and peptide-Fc fusion proteins that potently and selectively neutralize the interaction between Ang2 and its receptor, Tie2. Systemic treatment of tumor-bearing mice with these Ang2-blocking agents resulted in tumor stasis, followed by elimination of all measurable tumor in a subset of animals. These effects were accompanied by reduced endothelial cell proliferation, consistent with an antiangiogenic therapeutic mechanism. Anti-Ang2 therapy also prevented VEGF-stimulated neovascularization in a rat corneal model of angiogenesis. These results imply that specific Ang2 inhibition may represent an effective antiangiogenic strategy for treating patients with solid tumors.
Asunto(s)
Angiopoyetina 2/antagonistas & inhibidores , Angiopoyetina 2/inmunología , Anticuerpos/farmacología , Neoplasias/irrigación sanguínea , Neovascularización Patológica/prevención & control , Animales , Proliferación Celular/efectos de los fármacos , Córnea/irrigación sanguínea , Células Endoteliales/efectos de los fármacos , Femenino , Ratones , Ratones Desnudos , Trasplante de Neoplasias , Pruebas de Neutralización , Receptores Fc , Proteínas Recombinantes de Fusión/farmacología , Células Tumorales CultivadasRESUMEN
New scientific frontiers and emerging technologies within the life sciences pose many global challenges to society. Big Data is a premier example, especially with respect to individual, national, and international security. Here a Special Agent of the Federal Bureau of Investigation discusses the security implications of Big Data and the need for security in the life sciences.