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Int. J. Mol. Sci. 2015, 16(1), 2204-2219; doi:10.3390/ijms16012204

Identification and Analysis of Differentially-Expressed microRNAs in Japanese Encephalitis Virus-Infected PK-15 Cells with Deep Sequencing

1
Animal Biotechnology Center, College of Veterinary Medicine, Sichuan Agricultural University, Ya'an 625014, China
2
Key Laboratory of Animal Disease and Human Health, College of Veterinary Medicine, Sichuan Agricultural University, Ya'an 625014, China
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editor: Bing Yan
Received: 2 December 2014 / Accepted: 12 January 2015 / Published: 20 January 2015
(This article belongs to the Section Biochemistry, Molecular and Cellular Biology)
View Full-Text   |   Download PDF [1450 KB, uploaded 20 January 2015]   |  

Abstract

Japanese encephalitis virus (JEV), a mosquito-borne Flavivirus, causes acute viral encephalitis with high morbidity and mortality in humans and animals. MicroRNAs (miRNAs) are small noncoding RNAs that are important modulators of the intricate host-pathogen interaction networks. However, our knowledge of the changes that occur in miRNAs in host cells after JEV infection is still limited. To understand the molecular pathogenesis of JEV at the level of posttranscriptional regulation, we used Illumina deep sequencing to sequence two small RNA libraries prepared from PK-15 cells before and after JEV infection. We identified 522 and 427 miRNAs in the infected and uninfected cells, respectively. Overall, 132 miRNAs were expressed significantly differently after challenge with JEV: 78 were upregulated and 54 downregulated. The sequencing results for selected miRNAs were confirmed with RT-qPCR. GO analysis of the host target genes revealed that these dysregulated miRNAs are involved in complex cellular pathways, including the metabolic pathway, inflammatory response and immune response. To our knowledge, this is the first report of the comparative expression of miRNAs in PK-15 cells after JEV infection. Our findings will underpin further studies of miRNAs’ roles in JEV replication and identify potential candidates for antiviral therapies against JEV. View Full-Text
Keywords: Japanese encephalitis virus; microRNA; pathogenesis; deep sequencing Japanese encephalitis virus; microRNA; pathogenesis; deep sequencing
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Cai, Y.; Zhu, L.; Zhou, Y.; Liu, X.; Liu, X.; Li, X.; Lang, Q.; Qiao, X.; Xu, Z. Identification and Analysis of Differentially-Expressed microRNAs in Japanese Encephalitis Virus-Infected PK-15 Cells with Deep Sequencing. Int. J. Mol. Sci. 2015, 16, 2204-2219.

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