Figure 3.
Activation of AMPK by U0126 is dependent on the presence of LKB1.
(A) U0126-induced activation of AMPK is dependent on LKB1 in MEFs. Immortalized Lkb1+/+ and Lkb1-/- MEFs were serum-starved and treated with 20 μM of U0126 for 2 hr.
(B) U0126-induced activation of AMPK is dependent on LKB1 in SK-Mel-28 cells. SK-Mel-28 cells were infected with lentivirus encoding two different shRNA against LKB1 (sh2 and sh3) or control shRNA (sh1), serum-starved and treated with 20 μM of U0126 for 2 hr.