Fig. 3. Expression of heme oxygenase 1 (HO-1) and heme oxygenase (HO) activity in the liver after pentobarbital (PENTO) or isoflurane (ISO) anesthesia, with or without dexamethasone (ISO + Dex), or gadolinium chloride (ISO + GdCl). (  A ) Northern blot. (  B ) Western blot. (  A and  B ) The  two lanes corresponding to each intervention show the results of two representative experiments. (  C ) Densitometric analysis of HO-1 messenger RNA (mRNA) and (  D ) HO activity of all individual experiments (n = 5–7/group). *  P < 0.05  versus pentobarbital. #  P < 0.05  versus isoflurane.