NDLI: MicroRNA transcriptome analysis of porcine vital organ responses to immunosuppressive porcine cytomegalovirus infection

Content Provider	Springer Nature : BioMed Central
Author	Liu, Xiao Wei, Haoche Liao, Shan Ye, Jianheng Zhu, Ling Xu, Zhiwen
Abstract	Background Porcine cytomegalovirus (PCMV) is an immunosuppressive virus that mainly inhibits T-lymphocyte and macrophage immune functions; it has significantly damaged the farming industry. Although recent studies have shown that miRNAs play important roles in immune responses, the regulatory mechanisms of miRNAs during immunosuppressive virus infection remain unclear. Methods In this study, porcine small-RNA transcriptomes of PCMV-infected and uninfected vital organs were first characterised by high-throughput sequencing. miRDeep2 software was used to predict novel pig-encoded miRNAs. To verify the accuracy of the high-throughput sequencing results, stem-loop qRT-PCR was performed on 12 significantly DE miRNAs. The physical and functional interactions between the immune-related target genes of the DE miRNAs in PCMV-infected organs were analysed using the STRING database. Results In total, 306 annotated and 295 novel miRNAs were identified from PCMV-infected and uninfected porcine organs, respectively, through alignment with known Sus scrofa pre-miRNAs. Overall, 92, 107, 95, 77 and 111 miRNAs were significantly differentially expressed in lung, liver, spleen, kidney and thymus after PCMV infection, respectively. According to Gene Ontology enrichment analysis, target genes of the differentially expressed miRNAs associated with immune system processes, regulation of biological processes and metabolic processes were enriched in every sample. Integrated expression analysis of the differentially expressed miRNAs and their target mRNAs in PCMV-infected thymus showed that the significant differential expression of specific miRNAs under the pressure of PCMV infection in central immune organs interfered with the expression of genes involved in important immune-related signalling pathways, thus promoting the viral infection. Conclusions This is the first comprehensive analysis of the responses of host small-RNA transcriptomes to PCMV infection in vital porcine organs. It provides new insights into the regulatory mechanisms of miRNAs during infection by immunosuppressive viruses.
Related Links	https://virologyj.biomedcentral.com/counter/pdf/10.1186/s12985-018-0922-x.pdf
Ending Page	12
Page Count	12
Starting Page	1
File Format	HTM / HTML
DOI	10.1186/s12985-018-0922-x
Journal	Virology Journal
Issue Number	1
Volume Number	15
Language	English
Publisher	BioMed Central
Publisher Date	2018-01-18
Access Restriction	Open
Subject Keyword	Virology Porcine cytomegalovirus microRNA transcriptome Porcine organ High-throughput sequencing Integrated expression analysis
Content Type	Text
Resource Type	Article
Subject	Virology Infectious Diseases
Journal Impact Factor	4/2023
5-Year Journal Impact Factor	3.8/2023

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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