文献类型： 外文期刊

作者： Guo, Hai -Xiang ¹ ; Wang, Bing-Bing ¹ ; Wu, Hong-Yu ¹ ; Feng, Hao-Yuan ¹ ; Zhang, Hong-Yi ¹ ; Gao, Wei ¹ ; Yuan, Bao ¹ ;

作者机构： 1.Jilin Univ, Coll Anim Sci, Dept Lab Anim, Changchun 130062, Jilin, Peoples R China

2.Jilin Acad Agr Sci, Jilin 132101, Jilin, Peoples R China

关键词： Turtle peptide; Turtle -derived peptide; Ulcerative colitis; TLR4/NF; kappa B pathway; Gut microbiota

期刊名称：INTERNATIONAL IMMUNOPHARMACOLOGY （ 影响因子：4.8； 五年影响因子：5.0 ）

ISSN： 1567-5769

年卷期： 2024 年 132 卷

页码：

收录情况： SCI

摘要： Ulcerative colitis (UC) is a recurrent intestinal disease with an increasing incidence worldwide that seriously affects the life of patients. Turtle peptide (TP) is a bioactive peptide extracted from turtles that has antiinflammatory, antioxidant and anti -aging properties. However, studies investigating the effect of TP on the progression of UC are lacking. The aim of this study was to investigate effects and underlying mechanisms of TP and its derivative peptide GPAGPIGPV (GP -9) in alleviating UC in mice. The results showed that 500 mg/kg TP treatment significantly ameliorated colitis symptoms and oxidative stress in UC mice. TP alleviated intestinal barrier damage in UC mice by promoting mucosal repair and increasing the expression of tight junction proteins (ZO1, occludin and claudin-1). TP also modulated the composition of the gut microbiota by increasing the abundance of the beneficial bacteria Anaerotignum , Prevotellaceae_UCG-001 , Alistipes , and Lachno-spiraceae_NK4A136_group and decreasing the abundance of the harmful bacteria Prevotella_9 and Parasutterella . Furthermore, we characterized the peptide composition of TP and found that GP -9 ameliorated the symptoms of dextran sodium sulfate (DSS)-induced colitis in mice by inhibiting the TLR4/NF- kappa B signaling pathway. In conclusion, TP and its derivative peptides ameliorated DSS-induced ulcerative colitis by inhibiting the expression of inflammatory factors and modulating the composition of the intestinal microbiota; this study provides a theoretical basis for the application of TP and its derivative peptides for their anti-inflammatory activity.