ABCG2 and glioblastoma: Therefore, we conclude that these data together with the BBB penetration (Table 2), Kp,uu value in mice (0.23), in vitro data (Figure 1), and exclusion as a substrate of P-glycoprotein and BCRP shows enough evidence of GLR2007’s potential efficacy for the possible treatment of GBM to support further investigation of GLR2007 through more research and clinical trials (19).