The effects of antioxidants on a porcine model of liver hemorrhage.

Purpose: The aim of this study is to assess the efficacy of the combination of N-acetylcysteine (NAC) and deferoxamine (DFO) in the resuscitation from hemorrhagic shock in a porcine model of bleeding during hepatectomy. Methods: Twenty-one pigs were divided randomly to three groups: Sham (S) group n=5, fluid (F) resuscitation group n=8 and fluid plus NAC plus DFO (NAC&DFO) resuscitation group n=8. The animals of groups F and NAC&DFO were subjected to left hepatectomy and controlled hemorrhage from the traumatic liver surface. Shock was established within 10 min and maintained for 30 min at mean arterial pressure (MAP) of 30 to 40 mmHg. Resuscitation followed the shock period with crystalloids and colloids. Group NAC&DFO received additionally NAC and DFO in doses of 200mg/kg and 65mg/kg respectively. The total time of the experiment was 6 hours. Results: Animal weight, blood loss, excised liver mass and MAP at the end of the shock period were comparable between experimental groups. Group NAC&DFO received significantly lower volume of both crystalloids and colloids (35% and 42% less, respectively) compared to group F. Hepatocellular proliferation (PCNA) was higher in the antioxidant group. Apoptosis, measured by Caspase-3, was restored to sham group levels when NAC and DFO were administered. Conclusions: Our experimental study showed that co-administration of NAC and DFO during liver hemorrhage can decrease the amounts of fluids needed for resuscitation. Moreover the antioxidant combination restores the energy dependent apoptosis and proliferation of the hepatocytes. Study type: Therapeutic (C) 2016 Lippincott Williams & Wilkins, Inc.

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