Lactiplantibacillus plantarum Regulated Intestinal Microbial Community and Cytokines to Inhibit Salmonella typhimurium Infection

• Published in: Probiotics and antimicrobial proteins 2023-10, Vol.15 (5), p.1355-1370
• Main Authors: Liu, Rui-Han, Sun, An-Qi, Liao, Ye, Tang, Zheng-Xu, Zhang, Shi-Han, Shan, Xin, Hu, Jing-Tao
• Format: Article
• Language: English
• Subjects: Antibacterial activity; Applied Microbiology; Bacteria; Biomedical and Life Sciences; Body weight loss; Chemistry/Food Science; Cytokines; Digestive system; Gastrointestinal tract; Histopathology; Homeostasis; Inflammation; Intestinal microflora; Intestine; Lactic acid bacteria; Lactiplantibacillus plantarum; Life Sciences; Microbiology; Microbiomes; Nutrition; Oral administration; Protein Science; rRNA 16S; Salmonella; Survival
• ISSN: 1867-1306; 1867-1314
• DOI: 10.1007/s12602-022-09987-5

Lactic acid bacteria (LAB) are recognized as food-grade safe microorganisms and have many beneficial effects. LAB could maintain the host intestinal homeostasis and regulate intestinal microbial community to exert antibacterial effects. In this study, Lactiplantibacillus plantarum ( L. plantarum , Lp01) strain isolated from pig intestine was orally administered to C57BL/6 mice, and mice were then infected with Salmonella typhimurium (ATCC14028). The protective effects of L. plantarum were evaluated by monitoring body weight loss, survival rates, bacterial loads in tissue, colon histopathology analysis, and cytokine secretion. 16S rRNA gene sequencing was also utilized to detect the dynamics of the blind gut microbial community in mice. We found that L. plantarum could significantly reduce the body weight loss and improve the survival rates. The survival rate in the L. P-Sty group was up to 67.5%, which was much higher than that in the STY group (25%). Counting of bacterial loads displayed that the colony-forming unit (CFU) of S. typhimurium in the spleen ( p