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Emodin is an effective component in rhubarb to cure intestinal dysfunction, but the specific mechanism remains unknown. This study aimed to evaluate the protective effects of emodin on intestinal dysfunction caused by acute severe pancreatitis and reveal the functional mechanism of emodin in the treatment of this condition. An acute severe pancreatitis model was prepared using taurocholate. In the treatment group, 50 mg/kg emodin was injected intravenously 2 h before the induction of acute severe pancreatitis at an interval of 8 h. After 24 h, the gene expression and protein levels of miR-218a-5p, RhoA, ROCK1, Akt, Notch1, Bax, Bcl-2, Fas, FasL, caspase-3, and caspase-9 were determined through reverse transcription polymerase chain reaction and Western blot analysis. The protein levels of occludin, zonula occludens-1 (ZO-1), and E-cadherin in the intestinal tract were also determined through Western blot analysis. The effects of miR-218a-5p on the apoptosis of rat intestinal epithelial cell-18 were observed through flow cytometry. The effects of emodin on intestinal cell apoptosis induced by acute severe pancreatitis were observed via TUNEL (terminal deoxynucleotidyl transferase dUTP nick-end labeling). Pathological changes in the pancreas and intestine of rats in each group were observed through hematoxylin and eosin staining. After 24 h of acute severe pancreatitis induced by taurocholate, emodin reduced the expression of miR-218a-5p in the intestinal tract; increased the expression of Notch1 and Bcl-2; decreased the expression levels of RhoA, ROCK1, Akt, Bax, Fas, FasL, caspase-3, and caspase-9; inhibited the intestinal cell apoptosis caused by acute severe pancreatitis; increased the protein expression levels of occludin, zonula occludens-1 (ZO-1), and E-cadherin in the intestinal tract; and alleviated intestinal dysfunction caused by acute severe pancreatitis. Emodin could regulate Notch1 and RhoA/ROCK pathways by regulating the miR-218a-5p expression in the intestine. It could also inhibit intestinal cell apoptosis induced by acute severe pancreatitis and improve the intestinal dysfunction caused by severe acute pancreatitis.

Effects of emodin on intestinal mucosal barrier by the upregulation of miR-218a-5p expression in rats with acute necrotizing pancreatitis