Ancient human herpes simplex 1 genomes
Ontology highlight
ABSTRACT:
PROVIDER: PRJEB46097 | ENA |
REPOSITORIES: ENA
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Project description:Herpes simplex virus mutants lacking the vhs gene are severely attenuated in animal models of pathogenesis and exhibit reduced growth in primary cell culture. As a result of these properties vhs-deleted virus have been proposed as live-attenuated viruses. Despite these findings and their implications for vacccines, the mechanisms by which vhs promotes infection in cell culture and in vivo are not understood. In this study we demonstrate that vhs-deficent viruses replicate to reduced levels in interferon(IFN)- primed cells. Furthermore, vhs-defective viruses induce increased levels of IFN? and IFN?-stimulated genes, and increased levels of eIF2? phosphorylation in infected cells. In addition, we demonstrate a generalized over-expression of viral RNAs following infection with a vhs-deficient virus. This suggests increased expression of IFN pathway inducing double stranded RNA, a potent pathogen-associated molecular pattern (PAMP). Together these data show that vhs likely functions to reduce innate immune responses and thereby acts as critical determinant of viral pathogenesis. Keywords: time course, genetic modification Time course (1,3,6,9 & 12h) of HSV infected mouse embryo fibroblasts. Wild type (KOS) virus is co-hybridized with vhs null virus (NHB). Each time-point is hybridized in quadruplicate.
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Project description:This is a part of the study that shows that a host gene,ONECUT2( OC2), promotes herpes simplex virus 1 (HSV-1) genome accessibility. These ATAC analyses are for viral and host genome accessibility in Neuro-2a cells. Neuro-2a cells were transfected with pOC2△HOX2 and pcDNA plasmids for 42 hours then infected with herpes simple virus1 for 2 hours.
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Project description:The brain is highly sensitive to damage caused by infection and inflammation. Herpes simplex virus-1 (HSV-1) is a neurotropic virus and the cause of herpes simplex encephalitis. It is unknown whether neuron-specific antiviral factors control virus replication to prevent infection and excessive inflammatory responses, hence protecting the brain. Using genome-wide CRISPR screening for HSV-1 restriction factors, we identified TMEFF1, which is expressed specifically in CNS neurons and not regulated by type I interferon, as the best-known innate antiviral system controlling virus infections. Depletion of TMEFF1 in stem-cell-derived human neurons led to elevated viral replication and neuronal death upon HSV-1 infection. TMEFF1 blocked the HSV-1 replication cycle at the level of viral entry through interactions with Nectin-1 and non-muscle myosin heavy chain IIA/B, which are core proteins in virus-cell binding and virus-cell fusion, respectively. Importantly, Tmeff1-/- mice exhibited increased susceptibility to HSV-1 infection in the brain but not in the periphery. Within the brain, elevated viral load was observed specifically in neurons. Our study identifies TMEFF1 as a neuron-specific restriction factor essential for prevention of HSV-1 replication in the CNS.
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Project description:The Latency-Associated Transcript Locus of Herpes Simplex Virus 1 is a Virulence Determinant in Human Skin
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Project description:The goal of this study was to compare the whole transcriptional profile (RNA-seq) of herpes simplex virus type 1 (HSV-1) infected and mock infected human fibroblast KMB17 strain at 48 hours post infection.There is increasing evidence that circular RNAs (circRNAs) are involved in diverse pathogenesis processes; however, their roles in virus infection remain unclear. Here, we profiled global changes of circRNAs, genes and microRNA (miRNAs) under herpes simplex virus type 1 (HSV-1) infection by RNA-seq. Numerous dysregulated transcripts comprised of 536 circRNAs, 3,885 genes and 207 miRNAs were found during viral infection. The dysregulated genes were enriched to NOD-like receptor signaling pathway, Jak-STAT signaling pathway and pathways of apoptosis, cell cycle progression and cell death, all of which may be implicated in viral pathogenesis and cellular immunity. Further integration analysis of circRNAs, genes and miRNAs reveals putative involvement of circRNAs in viral pathogenesis and antiviral immunity by circRNA-miRNA-gene regulatory axis. This work provides a comprehensive view for dysregulated circRNAs induced by HSV-1 and their interplay with miRNAs and genes, thus offering new insights into the mechanisms of interactions between HSV-1 and its host.
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