title: The porcine microRNA transcriptome response to transmissible gastroenteritis virus infection.
abstract: Transmissible gastroenteritis virus (TGEV; Coronaviridae family) causes huge economic losses to the swine industry. MicroRNAs (miRNAs) play a regulatory role in viral infection and may be involved in the mammalian immune response. Here, we report a comprehensive analysis of host miRNA expression in TGEV-infected swine testis (ST) cells. Deep sequencing generated 3,704,353 and 2,763,665 reads from uninfected ST cells and infected ST cells, respectively. The reads were aligned to known Sus scrofa pre-miRNAs in miRBase 19, identifying 284 annotated miRNAs. Certain miRNAs were differentially regulated during TGEV infection. 59 unique miRNAs displayed significant differentially expression between the normal and TGEV-infected ST cell samples: 15 miRNAs were significantly up-regulated and 44 were significantly down-regulated. Stem-loop RT-PCR was carried out to determine the expression levels of specific miRNAs in the two samples, and the results were consistent with those of sequencing. Gene ontology enrichment analysis of host target genes demonstrated that the differentially expressed miRNAs are involved in regulatory networks, including cellular process, metabolic process, immune system process. This is the first report of the identification of ST cell miRNAs and the comprehensive analysis of the miRNA regulatory mechanism during TGEV infection, which revealed the miRNA molecular regulatory mechanisms for the viral infection, expression of viral genes and the expression of immune-related genes. The results presented here will aid research on the prevention and treatment of viral diseases.
authors.affiliation: Animal Biotechnology Center, College of Veterinary Medicine, Sichuan Agricultural University, Ya' an, China; Liver Center and Gastrointestinal Division, Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, United States of America.
authors.forename: Xiao
authors.initials: X
authors.lastname: Liu
authors.affiliation: Animal Biotechnology Center, College of Veterinary Medicine, Sichuan Agricultural University, Ya' an, China.
authors.forename: Ling
authors.initials: L
authors.lastname: Zhu
authors.affiliation: Animal Biotechnology Center, College of Veterinary Medicine, Sichuan Agricultural University, Ya' an, China.
authors.forename: Shan
authors.initials: S
authors.lastname: Liao
authors.affiliation: Animal Biotechnology Center, College of Veterinary Medicine, Sichuan Agricultural University, Ya' an, China; Key Laboratory of Animal Disease and Human Health, College of Veterinary Medicine, Sichuan Agricultural University, Ya' an, China.
authors.forename: Zhiwen
authors.initials: Z
authors.lastname: Xu
authors.affiliation: Animal Biotechnology Center, College of Veterinary Medicine, Sichuan Agricultural University, Ya' an, China.
authors.forename: Yuancheng
authors.initials: Y
authors.lastname: Zhou
mesh_terms: D000818:Animals; D002460:Cell Line; D005761:Gastroenteritis, Transmissible, of Swine / Q000378:metabolism*; D035683:MicroRNAs / Q000235:genetics*; D013552:Swine; D059467:Transcriptome
chemical_list: D035683:MicroRNAs