The aim of this study was to investigate the possible protective effects of adalimumab (ADA) on cell damage in rat liver tissue during ischemia/reperfusion (I/R) injury of infrarenal abdominal aorta. Thirty male Wistar-albino rats were divided into three groups: control, I/R, and I/R+ADA, each group containing 10 animals. Laparotomy without I/R injury was performed in the control group animals. Laparotomy in the I/R group was followed by two hours of infrarenal abdominal aortic cross ligation and then two hours of reperfusion. ADA (50 mg/kg) was administered intraperitoneally as a single dose, to the I/R+ADA group, five days before I/R. The tumor necrosis factor-alpha (TNF-alpha) (pg/mg protein) and nitric oxide (NO) (mu mol/g protein) levels in the I/R group (430.8 +/- 70.1, 8.0 +/- 1.1, resp.) were significantly higher than those in the I/R+ADA group (338.0 +/- 71.6, P = 0.006; 6.3 +/- 1.2, P = 0.008) and the control group (345.5 +/- 53.3, P = 0.008; 6.5 +/- 1.5, P = 0.010, resp.). I/R causes severe histopathological injury to the liver tissue, but ADA leads to much less histopathological changes. ADA treatment significantly decreased the severity of liver I/R injury. ADA pretreatment may have protective effects on experimental liver injury.