Targeted inhibition of pancreatic acinar cell calcineurin is a novel strategy to prevent post-ERCP pancreatitis.

Background and Aims: There is a pressing need to develop effective preventative therapies for post-ERCP pancreatitis (PEP). We demonstrated that early PEP events are induced through the calcium-activated phosphatase calcineurin and that global calcineurin deletion abolishes PEP in mice. A crucial question is whether acinar cell calcineurin controls the initiation of PEP in vivo .
Methods: We used a mouse model of PEP and examined the effects of in vivo acinar cell-specific calcineurin deletion by either generating a conditional knockout line or infusing a novel AAV-Ela-iCre into the pancreatic duct of a calcineurin floxed line.
Results: We found that PEP is dependent on acinar cell calcineurin in vivo , and this led us to determine that calcineurin inhibitors, infused within the radiocontrast, can largely prevent PEP.
Conclusions: These results provide impetus for launching clinical trials to test the efficacy of intraductal calcineurin inhibitors to prevent PEP.