Acta Agriculturae Zhejiangensis ›› 2023, Vol. 35 ›› Issue (12): 2785-2793.DOI: 10.3969/j.issn.1004-1524.20230088

• Animal Science • Previous Articles     Next Articles

Genes and pathways related to piglet diarrhea in miRNAs-MUC13 regulation system

LU Fuzeng(), HUA Weidong, CHU Xiaohong, DAI Lihe, CHEN Xiaoyu, ZHANG Lifeng, WANG Zhigang, XU Ruhai()   

  1. Institute of Animal Husbandry and Veterinary Medicine, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
  • Received:2023-01-29 Online:2023-12-25 Published:2023-12-27

Abstract:

In order to discover the molecular regulatory mechanism related to piglet diarrhea, the genes and pathways related to piglet diarrhea in the microRNAs-Mucin13 (miRNAs-MUC13) regulatory system were explored and verified. NCBI blastn tool was used to compare the nucleic acid sequences of mouse MUC13 gene and pig gene bank, and found that the similarity between them was 74%-87%, with high homology. Taking the mouse as a model, the miRDB, mirTarBase and TargetScan databases were selected to predict the miRNA sequence that regulated the MUC13 gene. The target genes of these miRNA sequences were predicted through the StarBase database, and 36 target gene intersections were obtained. The interaction network of piglet diarrhea genes was built around MUC13 and these 36 target genes by using Cytoscape software. The network contains 19 screened target genes, and 4 molecular complex groups were obtained based on MCOMD algorithm analysis. The gene and pathway enrichment analysis of these 4 molecular complexes were carried out through DAVID platform. The results showed that the target genes SRF and STAG2 and their involved pathways were related to piglet diarrhea. Using Escherichia coli strain 200 and piglet intestinal epithelial cell line (IPEC-1) as the test materials, the piglet diarrhea model was designed and verified by the in vitro cell test. The real-time fluorescence quantitative PCR (qRT-PCR) results showed that the relative expressions of MUC13, SRF, IL-6, MAPK, STAG2, NF-κB, TLR7 in the test group were significantly higher than those of the control group (P<0.05), so it was speculated that SRF and STAG2 genes were involved in the regulation of piglet diarrhea through MAPK, IL 6 and Toll-like receptor signal pathway in the miRNAs-MUC13 regulation system. This study explored 4 molecular complex groups and 2 core genes (SRF and STAG2) around the miRNAs-MUC13 regulatory system, and carried out experimental verification, which provided theoretical reference and scientific basis for targeted treatment of piglet diarrhea.

Key words: Mucin 13, microRNA, piglet diarrhea, gene network

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