Effect of Trolox on TNF-α and iNOS mRNA expression after hepatic ischemia and reperfusion. Values are means±s.e.m. for seven rats per group. *,**Significantly different (P<0.05, P<0.01) from controls. +Significantly different (P<0.05) from ischemia/reperfusion. C, control; I/R, ischemia/reperfusion; T, Trolox.