China Animal Husbandry and Veterinary Medicine ›› 2024, Vol. 51 ›› Issue (1): 74-85.doi: 10.16431/j.cnki.1671-7236.2024.01.008

• Nutrition and Feed • Previous Articles     Next Articles

Effect of Lactobacillus reuteri Replacing Antibiotics on the Expression of Intestinal miRNA in Piglets

LI Hongyi1, YANG Xuefen2, LIN Zesen1, WU Xiaofei1, LYU Qixin1, YU Jiali1, ZHANG Mao1   

  1. 1. College of Biology and Agriculture, Shaoguan University, Shaoguan 512000, China;
    2. State Key Laboratory of Swine and Poultry Breeding Industry, Key Laboratory of Animal Nutrition and Feed Science in South China, Ministry of Agriculture and Rural Affair, Guangdong Provincial Key Laboratory of Animal Breeding and Nutrition, Maoming Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
  • Received:2023-07-05 Online:2024-01-05 Published:2023-12-27

Abstract: 【Objective】 This study was conducted to investigate the effects of Lactobacillus reuteri LR1 replacing antibiotics on the expression of miRNA in different intestinal segments of piglets, so as to screen potential miRNA for studying the mechanism of Lactobacillus reuteri LR1 on regulating intestinal function of piglets.【Method】 A total of 144 cross-bred (Duroc×Landrace×Yorkshire) weaned piglets with similar body weight at 21 days old were selected and randomly divided into 3 groups, with 8 replicates in each group and 6 piglets in each replicate.The piglets in control group were fed with the basic diet, the piglets in antibiotic and probiotic groups were fed with the basic diet supplemented with compound antibiotics (100 mg/kg quinoline ethanol+75 mg/kg aureomycin) and 5×1010 CFU Lactobacillus reuteri LR1, respectively.The experiment lasted for 42 days.At the end of the experiment, 1 piglet from each replicate was randomly selected and slaughtered, the jejunum tissue was collected for miRNA high-throughput sequencing and analysis.The expression of the selected miRNA in duodenum, jejunum, ileum and colon were detected by Real-time quantitative PCR.【Result】 Lactobacillus reuteri LR1 supplementation caused significant changes in miRNA expression, altering the sort of highly expressed miRNA in jejunum.The potential target genes of differentially expressed miRNA were mainly enriched in metabolic related pathways, PI3K-Akt, MAPK, Chemokine and Ras signaling pathways.Real-time quantitative PCR results showed that the expression of differential miRNA in jejunum among 3 groups had the same result with RNA-Seq.Moreover, the expression of up-regulated miRNA showed a relatively consistent trend between control and antibiotic groups, down-regulated miRNA showed a relatively consistent trend between control and probiotic groups, while the highly expressed miRNA in intestine showed a relatively consistent expression trend among 3 groups.【Conclusion】 Adding Lactobacillus reuteri LR1 in diet replacing antibiotics could cause changes in the expression of intestinal miRNA.The differentially expressed miRNA screened could provide a foundation for research on the regulating intestinal development and nutrient absorption metabolism by Lactobacillus reuteri LR1 in piglets.

Key words: Lactobacillus reuteri; piglets; intestinal miRNA

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