Journal of Veterinary Science

The Korean Society of Veterinary Science (대한수의학회)
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Therapeutic effects of paeoniflorin on irritable bowel syndrome in rats

  • Lei Wang (Department of Pharmacy, Tianjin Second People's Hospital) ;
  • Jinyan Lei (Tianjin Institute of Hepatology) ;
  • Zeyu Zhao (School of Integrative Medicine, Tianjin University of Traditional Chinese Medicine) ;
  • Jianwei Jia (Tianjin Institute of Hepatology) ;
  • Li Wang (Department of Pharmacy, Tianjin Second People's Hospital)
  • Received : 2022.03.25
  • Accepted : 2022.10.14
  • Published : 2023.05.31
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Abstract

Background: Irritable bowel syndrome (IBS) is a functional bowel disorder (FBD). Objectives: To assess the therapeutic effects of paeoniflorin (PF) on IBS in rats. Method: Sixty male Sprague-Dawley rats were randomly divided into normal, model, positive drug, low-dose PF, medium-dose PF and high-dose PF groups (n = 10). After gavage for 2 consecutive weeks, the effect of PF on abdominal pain symptoms was assessed based on the abdominal withdrawal reflex (AWR) score, fecal water content and pathological changes in colon tissues. D-lactate, interleukin-1β (IL-1β), transforming growth factor-β (TGF-β) and tumor necrosis factor-α (TNF-α) were detected by enzyme-linked immunosorbent assay, and phosphorylated nuclear factor kappa B (p-NF-κB) p65 was detected by Western blotting. The abundance and diversity changes of intestinal flora were explored using 16S ribosomal RNA sequencing. Result: In PF groups, the mucosal morphology of colon tissues was intact, and the glands were arranged neatly and structured clearly, without obvious inflammatory cell infiltration. Compared with the model group, PF groups had significantly elevated pain threshold, and mRNA and protein levels of zonula occludens-1 (ZO-1) and occludin, decreased AWR score at 20 mmHg pressure, fecal water content, mRNA levels of IL-1β, TGF-β, and TNF-α, protein level of p-NF-κB p65 and level of serum D-lactate, and reduced levels of serum IL-1β, TGF-β, and TNF-α (p < 0.05, p < 0.01). PF groups had higher abundance of Lactobacillus, Akkermansia, Alistipes, and Bacteroides, but lower abundance of Desulfovibrio, Parasutterella, and Enterococcus than those of the model group. Conclusions: PF exerts therapeutic effects on IBS in rats probably by regulating the intestinal flora, and then up-regulating the expressions of ZO-1 and occludin in colon tissue while down-regulating the levels of IL-1β, TGF-β, TNF-α, D-lactate and p-NF-κB p65.

Keywords

Acknowledgement

This study was financially supported by Tianjin Medical Key Construction Discipline Fund Project (No. 2021-492).

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