Tissue oxidative stress level and remote organ injury in two-hit trauma model of sequential burn injury and peritoneal sepsis are attenuated with N-acetylcysteine treatment in rats.

Abstract

BACKGROUND: The second hit in trauma leads to an exaggerated inflammatory response and multiple organ failure. Infection following burn injury is a useful model for two-hit trauma studies. The aim of this study was to investigate the effect of N-acetylcysteine (NAC) treatment as an antioxidant in a two-hit trauma model. METHODS: 30% scalding burn injury was performed in 45 rats and cecal ligation-puncture (CLP) was performed 72 hours later. Groups were allocated as follows: Group I: No treatment was performed; Group II: Rats were treated with 150 mg/kg/day i.p. NAC for 72 h following CLP; Group III: Rats were treated with 150 mg/kg/day i.p. NAC for 6 days following thermal injury. Tissue samples were collected to study the tissue malonyldialdehyde (MDA) and glutathione (GSH) levels, and for histopathological examination on day 7. RESULTS: No difference in mortality between groups was detected. Tissue MDA levels significantly decreased in the liver (p=0.01, p=0.02) and ileum (p=0.01, p=0.02) in the treatment groups. Lung tissue GSH levels were found to be significantly increased in Group II (p=0.02). Lung injury scores were decreased in Group II (p=0.005) compared to the control group. CONCLUSION: NAC attenuated tissue oxidative stress level and remote organ injury in two-hit trauma. Further experimental and clinical studies on this subject are necessary.