Abstract:
:Rift Valley fever virus (RVFV) is an arbovirus that causes disease in livestock and humans in Africa and the Middle East. While human disease is typically mild and self-limiting, some individuals develop severe manifestations, such as hepatitis, hemorrhagic fever, or encephalitis. Encephalitis occurs 2 to 3 weeks after acute illness; therefore, we hypothesized that it was a result of an inadequate adaptive immunity. To test this hypothesis in vivo, we used an attenuated virus (DelNSsRVFV) that does not typically cause disease in mice. We first characterized the normal immune response to infection with DelNSsRVFV in immunocompetent mice and noted expansion of natural killer cells and monocytes, as well as activation of both CD8 and CD4 T cells. Depleting C57BL/6 mice of CD4 T cells prior to DelNSsRVFV infection resulted in encephalitis in 30% of the mice; in encephalitic mice, we noted infiltration of T cells and inflammatory monocytes into the brain. CD4 and CD8 codepletion in C57BL/6 mice, as well as CD4 depletion in CCR2 knockout mice, increased the frequency of encephalitis, demonstrating that these cell types normally contributed to the prevention of disease. Encephalitic mice had similar viral RNA loads in the brain regardless of which cell types were depleted, suggesting that CD4 T cells, CD8 T cells, and inflammatory monocytes did little to control viral replication in the brain. CD4-depleted mice exhibited diminished humoral and T cell memory responses, suggesting that these immune mechanisms contributed to peripheral control of virus, thus preventing infection of the brain.IMPORTANCE RVFV is found in Africa and the Middle East and is transmitted by mosquitos or through contact with infected animals. Infected individuals can develop mild disease or more severe forms, such as hepatitis or encephalitis. In order to understand why some individuals develop encephalitis, we first need to know which immune functions protect those who do not develop this form of disease. In this study, we used a mouse model of RVFV infection to demonstrate that CD4 T cells, CD8 T cells, and monocytes all contribute to prevention of encephalitis. Their likely mechanism of action is preventing RVFV from ever reaching the brain.
journal_name
J Viroljournal_title
Journal of virologyauthors
Harmon JR,Spengler JR,Coleman-McCray JD,Nichol ST,Spiropoulou CF,McElroy AKdoi
10.1128/JVI.01270-18subject
Has Abstractpub_date
2018-11-27 00:00:00issue
24eissn
0022-538Xissn
1098-5514pii
JVI.01270-18journal_volume
92pub_type
杂志文章abstract::Human foamy virus can establish persistent infections in human hematopoietic cell lines, such as H92.1.7 (erythroblastoid cells), Jurkat (CD4+ T cells), and U937 (myeloid-monocytic cells). The infection is characterized by constant production of infectious viruses (for > 2 1/2 years) with no cytopathic effects on the ...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.70.2.1250-1254.1996
更新日期:1996-02-01 00:00:00
abstract::In this study, we have extensively modified the Rb-binding domain of polyomavirus large T antigen. Mutant polyomavirus large T antigens were tested for their ability to bind pRb and p107 in vitro and assayed for their capacity to immortalize primary rat embryo fibroblasts in vivo. Polyomavirus large T antigen bound pR...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.70.7.4457-4465.1996
更新日期:1996-07-01 00:00:00
abstract:UNLABELLED:A hallmark of Ebola virus (EBOV) infection is the formation of viral inclusions in the cytoplasm of infected cells. These viral inclusions contain the EBOV nucleocapsids and are sites of viral replication and nucleocapsid maturation. Although there is growing evidence that viral inclusions create a protected...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.00459-16
更新日期:2016-07-27 00:00:00
abstract::Homozygous human immunodeficiency virus type 1 (HIV-1)-transgenic mice (Tg26) appear normal at birth but die within 3 to 4 weeks. The skin of these animals shows diffuse scaling and high-level expression of both HIV-1 mRNA and gp120. Previous experiments showed that treatment with human chorionic gonadatropin (hCG) pr...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/jvi.76.22.11710-11714.2002
更新日期:2002-11-01 00:00:00
abstract::A cell model of primary macrophages isolated from the peritoneal cavity of flavivirus-susceptible and congenic resistant mice has been used to study the extent and kinetics of antiviral effects against West Nile virus upon priming with alpha/beta interferon (IFN-alpha/beta) or poly(I-C) (pIC). The pattern of flaviviru...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.79.3.1753-1764.2005
更新日期:2005-02-01 00:00:00
abstract::We previously showed that the cellular proteins ZEB1 and ZEB2/SIP1 both play key roles in regulating the latent-lytic switch of Epstein-Barr Virus (EBV) by repressing BZLF1 gene expression. We investigated here the effects of cellular microRNA (miRNA) 200 (miR200) family members on the EBV infection status of cells. W...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.00923-10
更新日期:2010-10-01 00:00:00
abstract::Human papillomaviruses (HPVs) infect squamous epithelium and establish their genomes as episomes in proliferating basal cells. As infected cells differentiate, the viral DNA is amplified to high copy number and infectious virus is produced. Viral production has not yet been observed in vitro due to the inability of st...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.65.5.2254-2260.1991
更新日期:1991-05-01 00:00:00
abstract::The large-particle fraction from the cytoplasm of chick embryo fibroblasts infected with Semliki Forest virus was found to catalyze the incorporation of the 5'-triphosphates of guanosine, adenine, cytidine, and uridine into an acid-insoluble alkali-labile product. The conditions affecting the preparation and assay of ...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.1.1.97-109.1967
更新日期:1967-02-01 00:00:00
abstract::The effect of human cytomegalovirus infection on cellular DNA synthesis in human fibroblasts was measured by fluorometry and by incorporation of radiolabeled thymidine. The results show that although HCMV infection stimulates cellular DNA synthesis in both quiescent and serum-stimulated cells, radiolabeled thymidine i...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.70.9.6402-6404.1996
更新日期:1996-09-01 00:00:00
abstract:UNLABELLED:Tetherin (BST2, CD317, or HM1.24) is a host cellular restriction factor that prevents the release of enveloped viruses by mechanically linking virions to the plasma membrane. The precise arrangement of tetherin molecules at the plasma membrane site of HIV-1 assembly, budding, and restriction is not well unde...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.01880-15
更新日期:2015-11-18 00:00:00
abstract::Egress of wrapped virus (WV) to the cell periphery following vaccinia virus (VACV) replication is dependent on interactions with the microtubule motor complex kinesin-1 and is mediated by the viral envelope protein A36. Here we report that ectromelia virus (ECTV), a related orthopoxvirus and the causative agent of mou...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.06636-11
更新日期:2012-07-01 00:00:00
abstract::Herpes simplex virus type 1 (HSV-1) mutants impaired in the activities of the structural protein VP16 and the immediate-early (IE) proteins ICP0 and ICP4 establish a quiescent infection in human fibroblasts, with most cells retaining an inactive, repressed viral genome for sustained periods in culture. To date, the qu...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.01273-08
更新日期:2008-12-01 00:00:00
abstract::A sequence of polyadenylic acid, homogeneous in composition but heterogeneous in length, was isolated from complete pancreatic RNase digests of both middle and bottom RNAs of cowpea mosaic virus. The polyadenylic acid was 3'-terminal and occurred once per molecule. A fragment consisting of the polyadenylic acid and ap...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.26.2.243-248.1978
更新日期:1978-05-01 00:00:00
abstract::Recombinant human cytomegaloviruses that do not express UL97 kinase activity exhibit a distinctive plaque morphology characterized by the formation of highly refractile bodies late in infection. These structures were also observed in infected cells treated with the UL97 kinase inhibitor maribavir. Nuclear inclusions w...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.79.24.15494-15502.2005
更新日期:2005-12-01 00:00:00
abstract::A number of naturally occurring hepatitis B virus mutants that cannot synthesize the virus precore protein have been identified. Such mutants have been associated with more severe forms of hepatitis, including fulminant hepatitis. The most common mutation observed is a substitution of G to A in the distal precore gene...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.66.9.5682-5684.1992
更新日期:1992-09-01 00:00:00
abstract::The structural polypeptides of purified Plodia interpunctella granulosis virus were analyzed by three different two-dimensional gel systems. Isoelectric focusing followed by sodium dodecyl sulfate-polyacrylamide gel electrophoresis allowed resolution of 53 acidic polypeptides in the enveloped nucleocapsid of the virus...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.60.1.82-89.1986
更新日期:1986-10-01 00:00:00
abstract::For viruses with segmented genomes, genetic diversity is generated by genetic drift, reassortment, and recombination. Recombination produces RNA populations distinct from full-length gene segments and can influence viral population dynamics, persistence, and host immune responses. Viruses in the Reoviridae family, inc...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.02181-20
更新日期:2021-01-20 00:00:00
abstract::To study fundamental aspects of RNA recombination, an in vivo RNA recombination system was established. This system allowed the efficient generation of recombinant cytopathogenic pestiviruses after transfection of synthetic, nonreplicatable, subgenomic transcripts in cells infected with a replicating noncytopathogenic...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.78.12.6271-6281.2004
更新日期:2004-06-01 00:00:00
abstract::Three serial passage series of simian virus 40 (SV40) in CV-1 cells were initiated by infection directly from the same wild-type plaque isolate, three series were initiated by infection with another plaque isolate, and two series were initiated with each of two other plaque isolates. Aberrant SV40 genomes were not det...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.42.2.730-733.1982
更新日期:1982-05-01 00:00:00
abstract::Massive infection of memory CD4 T cells is a hallmark of early simian immunodeficiency virus (SIV) infection, with viral infection peaking at day 10 postinfection (p.i.), when a majority of memory CD4 T cells in mucosal and peripheral tissues are infected. It is not clear if mononuclear cells from the monocyte and mac...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.06372-11
更新日期:2012-01-01 00:00:00
abstract::V3-glycan-targeting broadly neutralizing antibodies (bNAbs) are a focus of HIV-1 vaccine development. Understanding the viral dynamics that stimulate the development of these antibodies can provide insights for immunogen design. We used a deep-sequencing approach, together with neutralization phenotyping, to investiga...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.00828-17
更新日期:2017-08-24 00:00:00
abstract::The inducible transcription factor NF-kappaB is commonly activated upon RNA virus infection and is a key player in the induction and regulation of the innate immune response. Borna disease virus (BDV) is a neurotropic negative-strand RNA virus, which replicates in the nucleus of the infected cell and causes a persiste...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.79.10.6043-6051.2005
更新日期:2005-05-01 00:00:00
abstract:UNLABELLED:As a herpesvirus, Epstein-Barr virus (EBV) establishes a latent infection that can periodically undergo reactivation, resulting in lytic replication and the production of new infectious virus. Latent membrane protein-1 (LMP1), the principal viral oncoprotein, is a latency-associated protein implicated in reg...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.00711-15
更新日期:2015-08-01 00:00:00
abstract:UNLABELLED:Herpes simplex virus 1 (HSV-1) glycoprotein B (gB)-specific CD8(+) T cells protect mice from herpes infection and disease. However, whether and which HSV-1 gB-specific CD8(+) T cells play a key role in the "natural" protection seen in HSV-1-seropositive healthy asymptomatic (ASYMP) individuals (who have neve...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.03419-14
更新日期:2015-04-01 00:00:00
abstract::Herpes simplex virus 1 (HSV-1) envelope glycoprotein D (gD) plays an essential role in viral entry. The functional regions of gD responsible for viral entry have been mapped to its extracellular domain, whereas the gD cytoplasmic domain plays no obvious role in viral entry. Thus far, the role(s) of the gD cytoplasmic ...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.01396-16
更新日期:2016-10-28 00:00:00
abstract::Cell lines were generated by cotransfection of Vero cells with pSV2neo and a plasmid containing the herpes simplex virus type 1 (HSV-1) EcoRI D fragment (coordinates 0.086 to 0.194). One such cell line (S22) contained the genes for alkaline exonuclease and several uncharacterized functions. Three mutant isolates of HS...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.62.1.91-99.1988
更新日期:1988-01-01 00:00:00
abstract::Combined Southern blot hybridization analyses of DNA digests of several clinical strains of Streptococcus pneumoniae have revealed the presence of a gene (hblR), or part of it, similar to the hbl7 gene coding for the cell wall lytic enzyme of the temperate HB-746 phage. The results confirmed that the genome of HB-746,...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.66.5.2860-2864.1992
更新日期:1992-05-01 00:00:00
abstract::Varicella-zoster virus (VZV) open reading frame 4 (ORF4) encodes a putative immediate-early protein which is homologous to herpes simplex virus type 1 (HSV-1) ICP27 on the basis of gene location and similarity in amino acid sequence. In transient expression assays, however, ORF4 and ICP27 exhibit different properties....
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.68.3.1987-1992.1994
更新日期:1994-03-01 00:00:00
abstract::The ascomycete Botrytis porri causes clove rot and leaf blight of garlic worldwide. We report here the biological and molecular features of a novel bipartite double-stranded RNA (dsRNA) mycovirus named Botrytis porri RNA virus 1 (BpRV1) from the hypovirulent strain GarlicBc-72 of B. porri. The BpRV1 genome comprises t...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.00292-12
更新日期:2012-06-01 00:00:00
abstract::Antisera were prepared against the three structural polypeptides of HADEN virus dissociated with sodium dodecyl sulfate. These immunological reagents were used in immunofluorescence tests to study the kinetics and location of polypeptide antigen appearance in infected cells. These sera did not neutralize virus infecti...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.13.3.608-613.1974
更新日期:1974-03-01 00:00:00