Antioxidant and anti-inflammatory action of melatonin in an experimental model of secondary biliary cirrhosis induced by bile duct ligation

Figure 7 Expression of tumor necrosis factor in the different experimental groups. Magnification 200 ×. All values are expressed as mean ± SD error. Significant difference exists between the BDL and control groups (CO and CO + Mel) (^eP < 0.001). Significant difference exists between the BDL and BDL + Mel groups (^fP < 0.001). CO: Control; CO + Mel: Control + melatonin; BDL: Bile duct ligation; BDL + Mel: Bile duct ligation + melatonin; TNF-α: Tumor necrosis factor-alpha.