Brain Neoplasms/genetics; Brain Neoplasms/pathology; Gene Expression Regulation, Neoplastic; Gene Regulatory Networks; Mesoderm/metabolism; Mesoderm/pathology; Transcription, Genetic; Animals; Brain Neoplasms/diagnosis; CCAAT-Enhancer-Binding Protein-beta/genetics; CCAAT-Enhancer-Binding Protein-beta/metabolism; Cell Differentiation/genetics; Cell Line, Tumor; Cell Transformation, Neoplastic/genetics; Cell Transformation, Neoplastic/metabolism; Cell Transformation, Neoplastic/pathology; Cellular Reprogramming/genetics; Computational Biology; Glioma/diagnosis; Glioma/genetics; Glioma/pathology; Humans; Mesenchymal Stem Cells/metabolism; Mesenchymal Stem Cells/pathology; Mice; Mice, Inbred NOD; Mice, SCID; Neoplasm Invasiveness/genetics; Neoplasm Invasiveness/pathology; Neurons/metabolism; Neurons/pathology; Prognosis; Reproducibility of Results; STAT3 Transcription Factor/genetics; STAT3 Transcription Factor/metabolism