Liver tissues were homogenized in cold mammalian cell lysis buffer with protease and phosphatase inhibitor cocktails as described previously (32 (link)). Tissue lysates were then centrifuged and the resulting supernatants were used for immunoblot analyses. Ago2 primary antibody (36 ) and α-Tubulin primary antibody (37 ) were purchased from Cell Signaling Technology. PPARα primary antibody (38 ) was purchased from Santa Cruz. Antimouse immunoglobulin G (IgG) secondary antibody (39 ) was purchased from GE Life Sciences. Horseradish peroxidase–conjugated goat antirabbit IgG (H+L) secondary antibody (40 ) was purchased from Invitrogen.