[Synergistic effect of Coptidis Rhizoma processed with Euodiae Fructus on ulcerative colitis through energy...

Based on the differences in targeted energy metabolomics, intestinal barrier protein expression, and glucose transport,the synergistic mechanism of Coptidis Rhizoma(CR) processed with Euodiae Fructus(ECR) on ulcerative colitis(UC) was explored.Mice were administered 4% dextran sulfate sodium to induce UC model, and then randomly divided into a model group, a CR group,and an ECR group. After 14 days of treatment, the therapeutic effect of processing on UC was assessed through histopathology of colon tissue and inflammatory indexes. Targeted energy metabolomics analysis was performed to evaluate the effect of processing on colon tissue energy metabolism. Molecular docking was carried out to predict the binding affinity of energy metabolites with intestinal barrier tight junction protein Claudin and glucose transporter 2(GLUT2). In vivo unidirectional intestinal perfusion experiments in rats were conducted to evaluate the effect of processing on intestinal glucose transport. The results showed that both CR and ECR could repair colon tissue damage in UC mice, downregulate tissue inflammatory factors interleukin-6(IL-6) and tumor necrosis factor-α(TNF-α)levels, with the efficacy of ECR being superior to CR. Processed products significantly upregulated levels of multiple metabolites in colon tissue glycolysis, tricarboxylic acid cycle, and oxidative phosphorylation, among which the upregulated levels of 1,6-diphosphate fructose and acetyl coenzyme A could bind well with Claudin and GLUT2. Additionally, the processed product also increased the expression of GLUT2 and enhanced glucose transport activity. This study suggests that ECR may enhance glucose transport to improve colon energy metabolism, promote barrier repair, and exert synergistic effects through processing.