RPS6KB1 and cholestasis: Correspondingly, the phosphorylation of AMPK was significantly lower in Sesn2−/− BDL mice than in Sesn2+/+ BDL mice, and the phosphorylation of p70S6K and S6 were significantly higher in Sesn2−/− BDL livers than in Sesn2+/+ BDL livers (Fig. 5G, H), indicating that bile acid-induced Sestrin2 negatively regulates mTORC1 activity during cholestasis.