(B) Increasing amount of Ad-RdxR or Ad-LPTDR were infected to WT primary hepatocytes for 24 hours. Hepatocytes were further serum-starved for 18 hours and stimulated with glucagon (10 nM) for 10 minutes. Levels of p-PKA substrates, p-CREB, CREB, radixin, Myc-radixin and GAPDH were determined by immunoblotting. 