数字农科院2.0

Intestinal microbiota-derived d-(+)-malic acid promotes pBD1 expression via p-p38/ATF1 signaling pathway to maintain porcine intestinal health

文献类型： 外文期刊

作者： Tao Gong;Xiaoxi Lu;Hong Zhang;Weifa Su;Yuanli Jin;Huan He;Bin Yao;Mingliang Jin;Yizhen Wang;Yuanzhi Cheng

作者机构：

关键词： Host defense peptides;Intestinal health;Malic acid;p38 signaling pathways;Pig

期刊名称： International Immunopharmacology

ISSN： 1567-5769

年卷期： 2025 年 154 卷

页码：

收录情况： SCIE（2025版）

摘要： This study aims to identify nutrients that enhance the expression of host defense peptides (HDPs) and to evaluate their application effects and regulatory mechanisms, thereby advancing the exploring of nutritional regulation of HDPs. To achieve this, we constructed 16 stable fluorescent reporter porcine epithelial cell lines, driven by promoters targeting eight porcine intestinal HDPs genes, using IPEC-1 and IPEC-J2 cells. Through untargeted metabolomics sequencing and high-throughput screening, 15 metabolites were identified as potential enhancers of pBD1 expression, with d-(+)-malic acid (DMA) emerged as the most effective candidate. Transcriptomic and western blot analysis suggested that DMA enhances pBD1 expression primarily via the p-p38/ATF1 signaling pathways. Functional studies demonstrated that DMA significantly improved intestinal barrier integrity and alleviated intestinal damage. Overall, this work successfully established promoter-driven fluorescent reporter cell lines and identified microbiota-derived metabolites enhancing pBD1 expression, such as DMA, as promising alternatives to antibiotics for maintaining porcine intestinal health.

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