Abstract
Pseudorabies virus (PRV), an alpha herpesvirus can enter the mammalian nervous system, causing Aujezsky’s disease. Previous studies have reported an alteration of microRNA (miRNA) expression levels during PRV infections. However, knowledge regarding miRNA response in nervous cells to PRV infection is still unknown. To address this issue, small RNA libraries from infected and uninfected mouse neuroblastoma cells were assessed after Illumina deep sequencing. A total of eight viral miRNA were identified, and ten host miRNAs showed significantly different expression upon PRV infection. Among these, five were analyzed by stem-loop RT-qPCR, which confirmed the above data. Interestingly, these viral miRNAs were mainly found in the large latency transcript region of PRV, and predicted to target a variety of genes, forming a complicated regulatory network. Moreover, ten cellular miRNAs were expressed differently upon PRV infection, including nine upregulated and one downregulated miRNAs. Host targets of these miRNAs obtained by bioinformatics analysis belonged to large signaling networks, mainly encompassing calcium signaling pathway, cAMP signaling pathway, MAPK signaling pathway, and other nervous-associated pathways. These findings further highlighted miRNA features in nervous cells after PRV infection and contributed to unveil the underlying mechanisms of neurotropism as well as the neuropathogenesis of PRV.
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Acknowledgements
The present study was funded by the National Natural Science Foundation of China (31272567), the Program for Innovative Research Team (in Science and Technology) at the University of Henan (14IRTSTHN015), and the Science and Technology Innovation Talent Support Plan of Colleges and Universities in Henan Province (14HASTIT022).
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Yongtao Li and Guanmin Zheng contributed equally to this work.
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Supplementary file 1
Predicted target genes of differentially expressed host miRNAs at 4 hpi. (XLS 1071 kb)
Supplementary file 2
Predicted target genes of differentially expressed host miRNAs at 28 hpi. (XLS 1194 kb)
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Li, Y., Zheng, G., Zhang, Y. et al. MicroRNA analysis in mouse neuro-2a cells after pseudorabies virus infection. J. Neurovirol. 23, 430–440 (2017). https://doi.org/10.1007/s13365-016-0511-y
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DOI: https://doi.org/10.1007/s13365-016-0511-y