...inhibiting mTOR using rapamycin had a more pronounced affect on proliferation in LKB1/KRAS mutant cell lines; in this case, the sensitive cluster also included the LKB1/BRAF mutant cell line CAL12T. The IC50 of the LKB1/MAPK mutant cluster was significantly different from the control cluster (40 nM vs >100 nM, P⩽0.04)...