Angiogenesis Inhibitors/pharmacology; Antibodies/pharmacology; Endothelial Cells/drug effects; Neoplasm Proteins/antagonists & inhibitors; Neoplasms/drug therapy; Neovascularization, Pathologic/prevention & control; Receptors, Cell Surface/antagonists & inhibitors; Animals; Antibody-Dependent Cell Cytotoxicity; CHO Cells; Cell Line, Tumor; Cricetinae; Cricetulus; Dose-Response Relationship, Drug; Endothelial Cells/metabolism; Flow Cytometry; Formaldehyde; Gene Expression Regulation, Neoplastic; Humans; Immunohistochemistry; In Situ Hybridization; Neoplasm Proteins/genetics; Neoplasm Proteins/metabolism; Neoplasms/blood supply; Neoplasms/genetics; Neoplasms/metabolism; Neovascularization, Pathologic/genetics; Neovascularization, Pathologic/metabolism; Paraffin Embedding; Phagocytosis; Polymerase Chain Reaction; RNA, Messenger/metabolism; Receptors, Cell Surface/genetics; Receptors, Cell Surface/metabolism; Tissue Fixation; Transfection