Development of a novel model of hypertriglyceridemic acute pancreatitis in mice.

Abstract

The morbidity rate of hypertriglyceridemic acute pancreatitis (HTG-AP) increased rapidly over the last decade. However an appropriate animal model was lacking to recapitulate this complicated human disease. We established a novel mice model of HTG-AP by poloxamer 407 (P-407) combined with caerulein (Cae). In our study, serum triglyceride levels of P-407 induced mice were elevated in a dose-dependent manner, and the pancreatic and pulmonary injuries were much severer in HTG mice than normal mice when injected with conventional dose Cae (50 ug/kg), what's more, the severity of AP was positively correlative with duration and extent of HTG. In addition, we found that a low dose Cae (5 ug/kg) could induce pancreatic injury in HTG mice while there was no obvious pathological injury in normal mice. Finally, we observed that HTG leaded to the increased infiltrations of macrophages and neutrophils in mice pancreatic tissues. In conclusion, we have developed a novel animal model of HTG-AP that can mimic physiological, histological, clinical features of human HTG-AP and it could promote the development of therapeutic strategies and advance the mechanism research on HTG-AP.