Angiogenesis Inhibitors/pharmacology; Drugs, Chinese Herbal/pharmacology; Gene Expression/drug effects; Neoplasms/drug therapy; Neovascularization, Pathologic/prevention & control; Vascular Endothelial Growth Factor A/metabolism; Vascular Endothelial Growth Factor Receptor-2/metabolism; Animals; Cell Proliferation/drug effects; Cell Survival/drug effects; Chick Embryo; Chorioallantoic Membrane/blood supply; Chorioallantoic Membrane/drug effects; Down-Regulation; Hep G2 Cells; Human Umbilical Vein Endothelial Cells/drug effects; Human Umbilical Vein Endothelial Cells/physiology; Humans; Male; Mice; Mice, Inbred BALB C; Mice, Nude; Microvessels/drug effects; Microvessels/pathology; Neoplasms/blood supply; Neoplasms/metabolism; Tumor Burden/drug effects; Vascular Endothelial Growth Factor A/genetics; Vascular Endothelial Growth Factor Receptor-2/genetics; Xenograft Model Antitumor Assays