Interestingly, a significant reduction in the phosphorylation levels of RPS6 in U-87 MG was also observed, while the levels of AMPK were oppositely regulated in these two GBM cell models (i.e., decreased in U-87 MG and increased in U-118 MG cells) (Figure 3B,C,E). Here, RPS6 is linked to glioblastoma.