Lactobacillus reuteri I5007 Modulates Intestinal Host Defense Peptide Expression in the Model of IPEC-J2 Cells and Neonatal Piglets

文献类型： 外文期刊

第一作者： Liu, Hongbin

作者： Liu, Hongbin;Hou, Chengli;Wang, Gang;Jia, Hongmin;Yu, Haitao;Zeng, Xiangfang;Qiao, Shiyan;Hou, Chengli;Thacker, Philip A.;Zhang, Guolong

作者机构：

关键词： Lactobacillus reuteri;intestinal epithelial cells;neonatal piglets;host defense peptide;gut microbiota

期刊名称：NUTRIENTS （ 影响因子：5.717； 五年影响因子：6.349 ）

ISSN： 2072-6643

年卷期： 2017 年 9 卷 6 期

页码：

收录情况： SCI

摘要： Modulation of the synthesis of endogenous host defense peptides (HDPs) by probiotics represents a novel antimicrobial approach for disease control and prevention, particularly against antibiotic-resistant infections in human and animals. However, the extent of HDP modulation by probiotics is species dependent and strain specific. In the present study, The porcine small intestinal epithelial cell line (IPEC-J2) cells and neonatal piglets were used as in-vitro and in-vivo models to test whether Lactobacillus reuteri I5007 could modulate intestinal HDP expression. Gene expressions of HDPs, toll-like receptors, and fatty acid receptors were determined, as well as colonic short chain fatty acid concentrations and microbiota. Exposure to 108 colony forming units (CFU)/mL of L. reuteri I5007 for 6 h significantly increased the expression of porcine beta-Defensin2 (PBD2), pBD3, pBD114, pBD129, and protegrins (PG) 1-5 in IPEC-J2 cells. Similarly, L. reuteri I5007 administration significantly increased the expression of jejunal pBD2 as well as colonic pBD2, pBD3, pBD114, and pBD129 in neonatal piglets (p < 0.05). This was probably associated with the increase in colonic butyric acid concentration and up-regulating expression of Peroxisome Proliferator-Activated Receptor-gamma (PPAR-gamma) and G Protein-Coupled Receptor 41 (GPR41) (p < 0.05), but not with stimulation of Pattern-Recognition Receptors. Additionally, supplementation with L. reuteri I5007 in the piglets did not affect the colonic microbiota structure. Our findings suggested that L. reuteri I5007 could modulate intestinal HDP expression and improve the gut health of neonatal piglets, probably through the increase in colonic butyric acid concentration and the up-regulation of the downstream molecules of butyric acid, PPAR-gamma and GPR41, but not through modifying gut microbiota structure.

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