Abstract:
:A major determinant of neurovirulence for the GDVII strain of Theiler's virus, a murine picornavirus, was mapped to the P1 capsid protein region. Chimeric viruses were constructed by using sequences from the 5' noncoding and P1 regions of the virulent GDVII strain to replace equivalent regions of the less virulent BeAn strain. Neurovirulence in mice progressively increased as larger regions of BeAn capsid protein-encoding sequences were replaced. The in vitro growth characteristics of the chimeras showed that some chimeras were growth delayed in BHK-21 cells even though the viral constructs exhibited larger plaque sizes, were less temperature sensitive, and were more thermally stable than BeAn. Examination of assembly intermediates revealed an altered pentamer conformation and delayed empty capsid formation for the growth-compromised viruses. For these constructs, their chimeric nature inadvertently resulted in virion assembly defects that complicated finer-scale mapping of the determinants of virulence within the capsid region. These results demonstrate the importance of determining in vitro growth characteristics of chimeras to correctly decipher the significance of their phenotypes. VP1 does not contain a complete determinate for virulence because a chimera with VP1-encoding sequences from GDVII in an otherwise BeAn virus has an attenuated phenotype but is not growth compromised in vitro. The source of sequences, BeAn or GDVII, in the 5' noncoding region had only slight effects on the virulence of recombinant constructs.
journal_name
J Viroljournal_title
Journal of virologyauthors
Pritchard AE,Jensen K,Lipton HLdoi
10.1128/JVI.67.7.3901-3907.1993subject
Has Abstractpub_date
1993-07-01 00:00:00pages
3901-7issue
7eissn
0022-538Xissn
1098-5514journal_volume
67pub_type
杂志文章abstract::Human immunodeficiency virus type 1 (HIV-1) mutations that confer escape from cytotoxic T-lymphocyte (CTL) recognition can sometimes result in lower viral fitness. These mutations can then revert upon transmission to a new host in the absence of CTL-mediated immune selection pressure restricted by the HLA alleles of t...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.02455-07
更新日期:2008-07-01 00:00:00
abstract::A gene encoding the large T antigen of polyomavirus was inserted into the baculovirus Autographa californica nuclear polyhedrosis virus so that gene expression was under the control of the strong, very late polyhedrin gene promoter. Significantly more large T antigen was produced in recombinant virus-infected insect c...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.61.5.1712-1716.1987
更新日期:1987-05-01 00:00:00
abstract:UNLABELLED:Little is known about the antiviral response in mollusks. As in other invertebrates, the interferon signaling pathways have not been identified, and in fact, there is a debate about whether invertebrates possess antiviral immunity similar to that of vertebrates. In marine bivalves, due to their filtering act...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.00591-16
更新日期:2016-08-12 00:00:00
abstract::Parvovirus capsids are assembled from multiple forms of a single protein and are quite stable structurally. However, in order to infect cells, conformational plasticity of the capsid is required and this likely involves the exposure of structures that are buried within the structural models. The presence of functional...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.00972-08
更新日期:2008-11-01 00:00:00
abstract::The immune response to bovine herpesvirus 1 (BHV-1) infection can protect cattle from subsequent challenge with the virus. This protection involves a variety of defensive strategies, and the activation of most of these defenses requires the recognition of viral proteins by the cellular immune system. To identify some ...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.64.10.5114-5122.1990
更新日期:1990-10-01 00:00:00
abstract::The gene encoding glycoprotein F (gF) of herpes simplex virus type 2 (HSV-2) was mapped to the region of the viral genome from 0.62 to 0.64 map units. This region is colinear with, and partially homologous to, the region of the HSV-1 genome previously shown to encode gC. Mapping of the gF gene was done by insertion of...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.49.3.741-747.1984
更新日期:1984-03-01 00:00:00
abstract:UNLABELLED:The potency and breadth of the recently isolated neutralizing human monoclonal antibodies to HIV-1 have stimulated interest in their use to prevent or to treat HIV-1 infection. Due to the antigenically diverse nature of the HIV-1 envelope (Env), no single antibody is highly active against all viral strains. ...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.02097-15
更新日期:2015-12-01 00:00:00
abstract::Sindbis virus nonstructural polyproteins and their cleavage products are believed to be essential components of viral RNA replication and transcription complexes. Although numerous studies have investigated the effect of mutations in nsP1-, nsP2-, and nsP4-coding regions on Sindbis virus-specific RNA synthesis, relati...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.68.9.5781-5791.1994
更新日期:1994-09-01 00:00:00
abstract::Although recombinant human adenovirus (HAV)-based vectors offer several advantages for somatic gene therapy and vaccination over other viral vectors, it would be desirable to develop alternative vectors with prolonged expression and decreased toxicity. Toward this objective, a replication-defective bovine adenovirus t...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.73.11.9137-9144.1999
更新日期:1999-11-01 00:00:00
abstract::Experimental evidence from the simian immunodeficiency virus (SIV) model of AIDS has shown that the nef gene is critical in the pathogenesis of AIDS. Consequently, nef is of considerable interest in both antiviral drug and vaccine development. Preliminary findings in two rhesus macaques indicated that a deletion of on...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.69.8.5117-5123.1995
更新日期:1995-08-01 00:00:00
abstract::The prototypic arenavirus lymphocytic choriomeningitis virus (LCMV) is a formidable battle horse for the study of viral immunology, as well as viral persistence and associated diseases. Investigations with LCMV have uncovered basic mechanisms by which viruses avoid elimination by the host adaptive immune response. In ...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.00555-06
更新日期:2006-09-01 00:00:00
abstract::The DNA synthesized in the nonpermissive host by the noncomplementing mutants am36 and am42 of bacteriophage phi W-14 contains about half the wild-type level of alpha-putrescinylthymine (putThy) and a correspondingly greater level of thymine. The mechanisms whereby thymine nucleotides are excluded from replicating DNA...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.47.3.399-405.1983
更新日期:1983-09-01 00:00:00
abstract::We have previously shown that the nonconserved carboxy-terminal exon of the adenovirus type 2 E1A-289R protein contains two interchangeable sequence elements, auxiliary region (AR) 1 and AR2, that are required for efficient CR3-mediated transcriptional activation of the viral E4 promoter (M. Bondesson, C. Svensson, S....
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.72.7.5978-5983.1998
更新日期:1998-07-01 00:00:00
abstract::Human cytomegalovirus (HCMV) glycoprotein B (gB), encoded by the UL55 open reading frame, is an essential envelope glycoprotein involved in cell attachment and entry. Previously, we identified residue serine 900 (Ser900) as a unique site of reversible casein kinase 2 phosphorylation in the cytoplasmic domain of HCMV g...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/jvi.78.1.285-293.2004
更新日期:2004-01-01 00:00:00
abstract:UNLABELLED:Despite encoding multiple viral proteins that modulate the retinoblastoma (Rb) protein in a manner classically defined as inactivation, human cytomegalovirus (HCMV) requires the presence of the Rb protein to replicate efficiently. In uninfected cells, Rb controls numerous pathways that the virus also command...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.01718-15
更新日期:2015-12-01 00:00:00
abstract::Cyclooxygenase-2 (COX-2) is a cellular enzyme in the eicosanoid synthetic pathway that mediates the synthesis of prostaglandins from arachidonic acid. The eicosanoids function as critical regulators of a number of cellular processes, including the acute and chronic inflammatory response, hemostasis, and the innate imm...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.78.22.12529-12536.2004
更新日期:2004-11-01 00:00:00
abstract::Primary sympathetic neuronal cultures were maintained for up to 5 weeks after inoculation with herpes simplex virus (HSV) without evidence of viral infection. Upon deprivation of nerve growth factor, the cultures produced infectious HSV, indicating that the cultures harbored latent HSV. This study demonstrates a funct...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.61.7.2311-2315.1987
更新日期:1987-07-01 00:00:00
abstract::The multifunctional simian and human immunodeficiency virus (SIV and HIV) Nef proteins are important for virulence. We studied the importance of selected Nef functions using an SIV Nef with mutations in two regions that are required for CD4 downregulation. This Nef mutant is defective for downregulating CD4 and, in ad...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/jvi.74.21.9836-9844.2000
更新日期:2000-11-01 00:00:00
abstract::Human immunodeficiency virus type 1 (HIV-1) clade C causes >50% of all HIV infections worldwide, and an estimated 90% of all transmissions occur mucosally with R5 strains. A pathogenic R5 simian-human immunodeficiency virus (SHIV) encoding HIV clade C env is highly desirable to evaluate candidate AIDS vaccines in nonh...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.00558-06
更新日期:2006-09-01 00:00:00
abstract::Adeno-associated virus (AAV) is a human parvovirus currently being developed as a vector for gene therapy applications. Because the gene transfer vector commonly retains only the AAV terminal repeats, propagation of recombinant AAV (rAAV) requires that the viral replication (Rep) and capsid (Cap) proteins be supplied ...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.71.3.1897-1905.1997
更新日期:1997-03-01 00:00:00
abstract::After the contagion measles virus (MV) crosses the respiratory epithelium within myeloid cells that express the primary receptor signaling lymphocytic activation molecule (SLAM), it replicates briskly in SLAM-expressing cells in lymphatic organs. Later, the infection spreads to epithelia expressing nectin-4, an adhere...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.03037-12
更新日期:2013-03-01 00:00:00
abstract::Cytomegaloviruses (CMVs) are members of the Betaherpesvirinae subfamily of the Herpesviridae, and their properties of latency, large DNA size, gene redundancy, and ability to be cloned as bacterial artificial chromosomes (BACs) suggest their utility as vaccine vectors. While the K181 strain of murine CMV (MCMV) is wid...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.79.5.2998-3008.2005
更新日期:2005-03-01 00:00:00
abstract::Most of the viral DNA extracted from simian virus 40 (SV40)-infected African green monkey kidney cells consists of circular molecules about 5.3 kilobases in contour length. However, about 1% of the viral DNA was found to occur as closed circular dimers that appeared to be formed, preferentially, late in infection. The...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.24.1.295-302.1977
更新日期:1977-10-01 00:00:00
abstract::The human genome encodes over 500 microRNAs (miRNAs), small RNAs (19 to 26 nucleotides [nt]) that regulate the expressions of diverse cellular genes. Many cellular processes are altered through a variety of mechanisms by human cytomegalovirus (HCMV) infection. We asked whether HCMV infection leads to changes in the ex...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.00961-08
更新日期:2008-09-01 00:00:00
abstract::The organization of adeno-associated virus serotype 4 (AAV 4) DNA was probed by using restriction enzymes. The cleavage sites of the following enzymes were mapped: BglII, BamI, HincII, KpnI, PstI, SalI, SstI, and XhoI. The orientation of transcription on the physical cleavage map was determined by locating the fragmen...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.35.3.653-661.1980
更新日期:1980-09-01 00:00:00
abstract:UNLABELLED:Hepatitis C virus (HCV) infects 180 million people worldwide and is a leading cause of liver diseases such as fibrosis, cirrhosis, and hepatocellular carcinoma. It has been shown that HCV can spread to naive cells using two distinct entry mechanisms, "cell-free" entry of infectious extracellular virions that...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.03241-13
更新日期:2014-05-01 00:00:00
abstract::Nipah virus (NiV) and Hendra virus (HeV) are emerging zoonotic viruses and the causative agents of severe respiratory disease and encephalitis in humans. Little is known about the mechanisms that govern the development of respiratory and neurological disease. Using a hamster model of lethal NiV and HeV infection, we d...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.00473-11
更新日期:2011-08-01 00:00:00
abstract::The human cytomegalovirus (HCMV) major immediate-early (MIE) enhancer contains five functional cyclic AMP (cAMP) response elements (CRE). Because the CRE in their native context do not contribute appreciably to MIE enhancer/promoter activity in lytically infected human fibroblasts and NTera2 (NT2)-derived neurons, we ...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.01524-06
更新日期:2007-06-01 00:00:00
abstract::During the acute phase of infection with influenza A virus, the degree of lymphopenia correlates with severity of disease. Factors that contribute to T-cell activation during influenza virus infection may contribute to this observation. Since the immune response is initiated when dendritic cells (DC) interact with T c...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/jvi.74.12.5460-5469.2000
更新日期:2000-06-01 00:00:00
abstract::Historically, the adenoviral E3 region was found to be nonessential for viral replication in vitro. In addition, adenoviruses whose genome was more than approximately 105% the size of the native genome were inefficiently packaged. These profound observations were used experimentally to insert transgenes into the adeno...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.79.9.5455-5465.2005
更新日期:2005-05-01 00:00:00