Intracellular pathways affected by statins in cholangiocarcinoma cells. Abbreviations: AMPK, adenosine monophosphate–activated protein kinase; COX2, cyclooxygenase-2; E2F-1, E2F transcription factor 1; ER, endoplasmic reticulum; FAK, focal adhesion kinase; FOXO, forkhead box O3; ICAM-1, intercellular adhesion molecule 1; LC3–11, light chain3–11; PERK, protein kinase R-like endoplasmic reticulum kinase; PI3, phosphatidylinositol 3-kinase; TGF-β1, transforming growth factor; TS, thymidylate synthase.