Protective Effect of miR-193a-5p and miR-320-5p on Caerulein-Induced Injury in AR42J Cells.

Acute pancreatitis is a common inflammatory disease. MicroRNAs have been implicated in the pathogenesis of acute pancreatitis. The purpose of this study was to investigate the precise roles of miR-193a-5p and miR-320-5p in AP. The levels of miR-193a-5p, miR-320-5p and tumor necrosis factor receptor-associated factor 3 were detected by quantitative real-time polymerase chain reaction. Cell apoptosis was determined using flow cytometry. Enzyme-linked immunosorbent assay was performed to measure TNF-α, IL-6, IL-1β and IL-8 production, amylase activity, and malondialdehyde content. Targeted relationship between miR-193a-5p or miR-320-5p and TRAF3 was confirmed by the dual-luciferase reporter and RNA immunoprecipitation assays. Our data showed that miR-193a-5p and miR-320-5p were down-regulated in acute pancreatitis serum and caerulein-treated AR42J cells. The increased expression of miR-193a-5p or miR-320-5p alleviated caerulein-induced cell injury in AR42J cells. Tumor necrosis factor receptor-associated factor 3 was a direct target of miR-193a-5p and miR-320-5p in AR42J cells. Moreover, miR-193a-5p and miR-320-5p regulated caerulein-induced AR42J cells injury through targeting tumor necrosis factor receptor-associated factor 3. The present findings demonstrated that miR-193a-5p and miR-320-5p protected AR42J cells against caerulein-induced cell injury by targeting tumor necrosis factor receptor-associated factor 3, highlighting their roles as potential therapeutic targets for acute pancreatitis treatment.