As shown in Figure 6D, gB and PDGFRα are found co-expressed in the same or adjacent tumor cells in situ (arrows), suggesting that autocrine or paracrine signaling initiated by gB, likely activated PDGFRα and downstream tumor promoting pathways (p-AKT), leading to enhanced glioma aggressiveness in this mouse model of disease. This evidence concerns the gene AKT1 and central nervous system cancer.