Acta Veterinaria et Zootechnica Sinica ›› 2022, Vol. 53 ›› Issue (12): 4527-4534.doi: 10.11843/j.issn.0366-6964.2022.12.038

• RESEARCH NOTES • Previous Articles     Next Articles

Analysis of Bone Marrow miRNA Expression Profiles in Salmonella enteric Serovar Pullorum-infected Chicks

YIN Lei1,2, PAN Xiaocheng1,2*, SHEN Xuehuai1,2, ZHANG Danjun1,2, DAI Yin1,2, WANG Jieru1,2   

  1. 1. Livestock and Poultry Epidemic Diseases Research Center of Anhui Province, Institute of Animal Husbandry and Veterinary Science, Anhui Academy of Agricultural Science, Hefei 230031, China;
    2. Anhui Province Key Laboratory of Livestock and Poultry Product Safety Engineering, Hefei 230031, China
  • Received:2021-11-05 Online:2022-12-23 Published:2022-12-25

Abstract: The aim of this study was to investigate the differential expression characteristics of miRNA in bone marrow of chicks infected with Salmonella enterica serovar Pullorum (S. Pullorum), thus to provide a theoretical basis for an in-depth understanding of the pathogenic mechanism of S. Pullorum. Seven-day-old SPF chicks were randomly divided into two groups and orally administered Salmonella enterica serovar Pullorum and PBS, respectively. Bone marrow was collected 24 h after infection for miRNA sequencing, and differentially expressed miRNAs with differential multiplicity ≥2 and P value ≤0.05 were screened for target gene prediction, GO and KEGG enrichment analysis, while six miRNAs of which were randomly selected for qRT-PCR validation. An miRNA-mRNA target network related to the immune process was constructed. A total of 20 known differentially expressed miRNAs were obtained by miRNA sequencing, of which 11 were up-regulated and 9 were down-regulated. qRT-PCR results showed that the miRNA change trend was consistent with the sequencing results. GO analysis showed that the differentially expressed genes were mainly enriched in membrane transport, signal transduction, immune system, carbohydrate metabolism, sugar biosynthesis and metabolism, etc. The signaling pathways of KEGG were mainly enriched in Notch signaling pathway, Hedgehog signaling pathway, PPAR signaling pathway, AMPK signaling pathway, Hippo signaling pathway, etc. The miRNA-mRNA network interactions identified gga-miR-1466 and gga-miR-6643-5p as possible key miRNAs involved in immune process. This experiment resolved the bone marrow miRNA expression profiles of S. Pullorum-infected chicks, providing new insights into the complex molecular pathogenesis of the interaction between S. Pullorum and chickens, and offering new strategies for the prevention and control of S. Pullorum infection in chickens.

Key words: Salmonella enterica serovar Pullorum, infection, bone marrow, miRNA, immune response

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