Effect of resveratrol on activation of nuclear factor kappa-B and inflammatory factors in rat model of acute pancreatitis

AIM: To observe the effect of resveratrol on nuclear factor Kappa-B (NF-kappa B) activation and the inflammatory response in sodium taurocholate-induced pancreatitis in rats. METHODS: Seventy-two male SD rats were randomly divided into three groups: sham operation group (control), severe acute pancreatitis (SAP) group, and severe acute pancreatitis group treated with resveratrol (RES). A SAP model was established by injecting 4% sodium taurocholate 1 mL/kg through puncturing the pancreatic duct. In Res group, Res was given at 30 mg/kg b.m. intraperitoneally after the SAP model was successfully established. Eight animals from each group were sacrificed at 3, 6 and 12 h after modeling. The expression of NF-kappa B activation of pancreas was detected by immunohistochemical staining, whereas the levels of TNF-alpha and IL-8 in pancreatic tissues were estimated by radioimmunoassay. The pathological changes of pancreas and lungs were examined microscopically. RESULTS: Much less hyperemia, edema, dust-colored necrotic focus and soaps were noticed in pancreas in RES group than in SAP group. In RES group, hemorrhage, exudates and infiltration of inflammatory cells in pancreas and interstitial edema, destruction of alveolar wall in lung were significantly less than in SAP group. In the SAP group, the activation of NF-kappa B in pancreatic tissues was enhanced significantly at any measure point compared with control group (64.23 +/- 10.72% vs 2.56 +/- 0.65%, 55.86 +/- 11.34% vs 2.32 +/- 0.42%, 36.23 +/- 2.30% vs 2.40 +/- 0.36%, P < 0.01), TNF-alpha, IL-8 were also increased and reached their peak at 6 h and then declined. The activation of NF-kappa B and the levels of TNF-alpha and IL-8 in RES group were significantly lower than those in SAP group (P< 0.01): activation (52.63 +/- 9.45% vs 64.23 +/- 10.72%, 40.52 +/- 8.40% vs 55.86 +/- 11.34%, 29.83 +/- 5.37% vs 36.23 +/- 2.30%), TNF-alpha (132.76 +/- 15.68 pg/mL vs 158.36 +/- 12.58 pg/mL, 220.32 +/- 23.57 pg/mL vs 247.67 +/- 11.62 pg/mL, 175.68 +/- 18.43 pg/mL vs 197.35 +/- 12.57 pg/mL) and IL-8 (0.62 +/- 0.21 mu g/L vs 0.83 +/- 0.10 mu g/L, 1.10 +/- 0.124 mu g/L vs 1.32 +/- 0.18 mu g/L, 0.98 +/- 0.16 mu g/L vs 1.27 +/- 0.23 mu g/L). CONCLUSION: The activation of NF-kappa B is involved in the inflammatory response of rats with SAP. Resveratrol could effectively inhibit the expression of NF-kappa B activation, alleviate the severity of SAP through its anti-inflammatory effects and regulate the inflammatory mediators. (C) 2005 The WJG Press and Elsevier Inc. All rights reserved.