Macrophage Activation; Macrophages/metabolism; Neoplasms/immunology; Phosphatidylinositol 3-Kinases/metabolism; Phosphoric Monoester Hydrolases/metabolism; Animals; Arginase/genetics; Arginase/metabolism; Biomarkers/metabolism; Cells, Cultured; Granulocyte-Macrophage Colony-Stimulating Factor/immunology; Granulocyte-Macrophage Colony-Stimulating Factor/metabolism; Inositol Polyphosphate 5-Phosphatases; Interleukin-4/immunology; Interleukin-4/metabolism; Lectins/genetics; Lectins/metabolism; Macrophage Activation/genetics; Macrophages/immunology; Macrophages/pathology; Mice; Mice, Knockout; Neoplasms/drug therapy; Neoplasms/pathology; Phosphatidylinositol 3-Kinases/immunology; Phosphoric Monoester Hydrolases/genetics; Phosphoric Monoester Hydrolases/immunology; RNA, Small Interfering/genetics; STAT6 Transcription Factor/genetics; STAT6 Transcription Factor/metabolism; Signal Transduction/genetics; Transcriptional Activation/genetics; Transgenes/genetics; beta-N-Acetylhexosaminidases/genetics; beta-N-Acetylhexosaminidases/metabolism; src Homology Domains/genetics