STAT3 and glioblastoma: A number of transcription factors, including C/EBP-β (CCAAT-enhancer-binding protein-β) and STAT3 (signal transducer and activator of transcription 3) and more recently the transcriptional coactivator TAZ (transcriptional coactivator with PDZ-binding motif), have been identified as important regulators of the mesenchymal phenotype in GBM [8, 9].