Background: Studies have proven the validity of interleukin-10 (IL-10) in the treatment of experimental pancreatitis. Prophylactic human IL-10 (hIL-10) gene treatment attenuated the severity in cerulein models. Our research aims to study whether the therapeutic hIL-10 gene could decrease both severity and mortality in a lethal pancreatic model.
Methods: Severe acute pancreatitis (SAP) was induced by sodium taurocholate. A plasmid-hIL-10 construct (pcDNA3-hIL-10) complexed with cationic liposomes was administered to SAP rats by a single intraperitoneal injection. Levels of hIL-10 in the pancreas, liver, and lungs were determined by ELISA kits. The severity of pancreatitis was assessed in terms of serum amylase, histology, and tissue tumor necrosis factor alpha (TNF-alpha). Mortality, observed for 7 days, was evaluated for gene therapy or control groups.
Results: After hIL-10 gene therapy, hIL-10 levels in the pancreas, liver, and lungs increased significantly and the serum amylase, tissue TNF-alpha, and histological changes in pancreas, liver, and lungs decreased markedly. Therefore, mortality was significantly reduced in the hIL-10 gene therapy group, in which 70% of rats survived in the 7-day observation, while only 10% survived in untreated groups (P < 0.05).
Conclusion: We found that liposome/hIL-10 gene therapy decreased severity and mortality in SAP, even carried out after SAP establishment, predicting a more convenient shift to clinical applications.
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