数字农科院2.0

Dietary 18β-Glycyrrhetinic Acid Supplementation Improves Intestinal Function and Gut Microbiota in D-Galactose-Challenged Weanling Pigs

文献类型： 外文期刊

作者： Ma, Cui;Wang, Fuxi;Li, Ruitong;Huang, Kang;Zhao, Qingyu;Qin, Yuchang;Zhang, Junmin;Si, Wei

作者机构：

关键词： 18 beta-glycyrrhetinic acid;gut microbiota;intestinal function;oxidative stress;weaned piglet

期刊名称： JOURNAL OF NUTRITION

ISSN： 0022-3166

年卷期： 2025 年 156 卷 1 期

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收录情况： SCIE（2025版）

摘要： Background Weaning-induced oxidative stress impairs feed intake and compromises intestinal health in piglets. 18 beta-glycyrrhetinic acid (GA), a bioactive triterpenoid from licorice, has multiple biological effects, but its protective role under oxidative stress in piglets remains unclear. Objectives This study aims to investigate the effects of GA on feed intake, intestinal health, and gut microbiota in weaned piglets exposed to D-galactose (Gal)-induced oxidative stress. Methods Twenty-four healthy large white piglets (weaned at days 28) were divided into 3 group: 1) Control group (n = 8), basal diet; 2) Gal group (n = 8), basal diet supplemented with Gal (10 g/kg body weight); and 3) GA + Gal group (n = 8), basal diet supplemented with GA (100 mg/kg diet) and Gal (10 g/kg body weight). The study lasted 28 d. At the end of the experiment, serum, hypothalamus tissue, jejunum tissue, ileum tissue, and ileum content were collected for biochemical, molecular, and microbial analyses. One-way analysis of variance followed by Duncan's test was used for data analysis. Results Compared with the Gal group, GA supplementation improved the average daily feed intake (Gal: 0.65 +/- 0.04 kg, GA + Gal: 0.79 +/- 0.06 kg) by 21.54% and average daily gain (Gal: 0.25 +/- 0.04 kg, GA + Gal: 0.41 +/- 0.06 kg) by 64% from days 14 to 28 (P < 0.05) but had no such effect from d 0 to 14 (P > 0.05), reduced serum malondialdehyde levels (Gal: 2.39 +/- 0.23 nmol/mL, GA + Gal: 1.52 +/- 0.25 nmol/mL, P < 0.05) and increased glutathione peroxidase activity (Gal: 88.33 +/- 6.06 nmol/min/mL, GA + Gal: 115.36 +/- 8.15 nmol/min/mL, P < 0.05). GA supplementation enhanced jejunal fluorescence expression of taste receptor type 1 member 2 (Gal: 46.15% +/- 2.07%, GA + Gal: 58.53% +/- 4.22%) and member 3 (Gal: 22.76% +/- 1.80%, GA + Gal: 35.81% +/- 2.63%) than those of Gal group (P < 0.05), and dietary GA also markedly increased ileal Romboutsia relative abundance (P < 0.05). Additionally, compared with the Gal group, GA supplementation increased the positive cells of appetite-related genes (Gal: 54.68% +/- 3.70%, GA + Gal:80.16% +/- 6.56%, and neuropeptide Y (NPY), Gal: 41.06% +/- 8.13%, GA + Gal: 75.38% +/- 9.45%) in the hypothalamus (P < 0.05), along with elevated serum levels of ghrelin (Gal: 1674.10 +/- 97.10 ng/mL, GA + Gal: 2260.41 +/- 113.22 ng/mL, P < 0.05) and NPY (Gal: 179.89 +/- 6.46 ng/mL, GA + Gal: 200.94 +/- 7.88 ng/mL, P < 0.05). Conclusions Our findings demonstrate that GA supplementation alleviates oxidative stress, with associated improvements in feed intake and intestinal function, likely mediated through taste receptor signaling, gut microbiota modulation, and hypothalamic appetite regulation. These findings support GA as a potential nutritional strategy to maintain gut health under stress conditions.

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