Acta Veterinaria et Zootechnica Sinica ›› 2024, Vol. 55 ›› Issue (7): 3085-3093.doi: 10.11843/j.issn.0366-6964.2024.07.027

• Preventive Veterinary Medicine • Previous Articles     Next Articles

Identification and Analysis of miRNAs of Neospora caninum

Jingyu LI(), Jinming CHEN, Mingyi ZHANG, Shanshan ZHAO, Deliang TAO, Junke SONG, Xin YANG, Yingying FAN, Guanghui ZHAO*()   

  1. College of Veterinary Medicine, Northwest A&F University, Yangling 712100, China
  • Received:2023-10-23 Online:2024-07-23 Published:2024-07-24
  • Contact: Guanghui ZHAO E-mail:ljy@nwafu.edu.cn;zgh083@nwsuaf.edu.cn

Abstract:

To identify specific expressed miRNAs of Neospora caninum and to investigate their expression in host cells, the samples of caprine endometrial epithelial cells (EECs) infected with tachyzoites of N. caninum at 24 and 48 h were collected. Specific expressed miRNAs of N. caninum and their in vitro expression were analyzed by using Illumina highthroughput sequencing technology and bioinformatics analysis. The effect of an up-regulated miRNA, novel3_mature, on the propagation of N. caninum in caprine EECs was also studied. The results showed that a total of 3 404 specific expressed miRNAs (155 novel predicted miRNAs) of N. caninum were identified. Of them, 77 (47 up- and 30 down-regulated) miRNAs were significantly differentially expressed. The consistent results were found with highthroughput sequencing by using quantitative real-time PCR analysis of seven significantly differentially expressed miRNAs randomly selected. Predictive analysis found 3 978 target genes of 61 miRNAs. Functional enrichment analysis showed that these target genes were possible involved in MAPK signaling pathway, axon guidance, focal adhesion, cAMP signaling pathway, calcium signaling pathway. Transfection of novel3_mature mimics significantly promoted the propagation of N. caninum in caprine EECs. Many specific expressed miRNAs were encoded by N. caninum and they played important roles in the propagation of N. caninum, providing a novel way to understand the intracellular survival of N. caninum.

Key words: Neospora caninum, caprine endometrial epithelial cells, miRNAs, novel3_mature, propagation

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