Abstract:
:Adaptation of the prototype A/FM/1/47 H1N1 strain to mice resulted in selection of the A/FM/1/47-MA variant with increased virulence. Earlier analysis identified mutations in the HA and M1 genes that increase virulence in the mouse. Complete sequence analysis identified mutations in the PB1, PB2, HA, NA, and M1 genes. Reassortants were produced between the parental FM and FM-MA strains to obtain viruses that differ due to combinations of mutant genes. To assess the relationship between virulence and replication, the median lethal dose was determined for mice and growth properties were assessed in mouse lung, MDCK cells and chicken embryo. Not only were all five mutations shown to control virulence but also the replicative capacity in the mouse. The HA, NA and M1 mutations increased yield in all three hosts whereas in combination the PB1 and PB2 mutations were host restrictive changing the virus to a mouse specific strain. For the NA and M1 mutations the increase in growth in mouse lung was proportional to a 2-fold (log10) increase in virulence however the HA mutation increased virulence largely independent of increased growth indicating a change in pathological properties that damage the host. Thus mutations that affect virulence can be classified according to host-dependent and independent ability to increase growth as well as changes in pathological properties. Each of the PB1, PB2, NA, HA, and M1 genes acquired gain-of-function mutations for mouse infection that involve structural motifs that may serve as markers for virulence or targets for antiviral therapy.
journal_name
Virus Resjournal_title
Virus researchauthors
Brown EG,Bailly JEdoi
10.1016/s0168-1702(99)00027-1subject
Has Abstractpub_date
1999-05-01 00:00:00pages
63-76issue
1eissn
0168-1702issn
1872-7492pii
S0168-1702(99)00027-1journal_volume
61pub_type
杂志文章相关文献
VIRUS RESEARCH文献大全abstract::Equine rhinitis A virus (ERAV) is a picornavirus which causes an acute respiratory infection in horses worldwide, and virus neutralization (VN) has been the standard method for the detection of ERAV antibody in horse serum. Previous studies have identified recombinant virion protein VP1 (rVP1) purified under native co...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/j.virusres.2009.03.003
更新日期:2009-07-01 00:00:00
abstract::Despite the fact that cells infected with wild type vaccinia virus synthesize viral DNA and assemble progeny virus particles within the cytoplasm, the host cell nucleus is required for a productive infection. Recent evidence suggests that vaccinia virus selectively recruits components from the host cell nucleus into t...
journal_title:Virus research
pub_type: 杂志文章,评审
doi:10.1016/0168-1702(87)90014-1
更新日期:1987-09-01 00:00:00
abstract::Dengue is now hyper-endemic in most parts of south and southeast Asia including India. The northern India particularly national capital New Delhi witnessed major Dengue outbreaks with Dengue virus type 1 (DENV-1) as the dominant serotype since last five years. This study was initiated to decipher the complete genome i...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/j.virusres.2014.08.018
更新日期:2015-01-02 00:00:00
abstract::The Autographa californica multiple nucleopolyhedrovirus (AcMNPV) ac78 gene is one of the baculovirus core genes. Recent studies showed that ac78 is essential for budded virion (BV) production and the embedding of occlusion-derived virion (ODV) into occlusion body during the AcMNPV life cycle. Here, we report that an ...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/j.virusres.2014.07.019
更新日期:2014-10-13 00:00:00
abstract::The polyprotein precursor of the Hepatitis C virus (HCV) contains multiple membrane-spanning domains that define the membrane topology and subsequent maturation of the viral structural proteins. In order to examine the biogenesis of the E1-E2 heterodimeric complex, we inserted an affinity tag (S-peptide) at specific l...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/j.virusres.2004.04.013
更新日期:2004-09-15 00:00:00
abstract::Post-translational modification of target proteins by the Small Ubiquitin-like Modifier (SUMO) plays a critical role in regulation of many cellular processes including transcription, RNA processing, protein trafficking, DNA repair, and chromosome segregation, and is also often hijacked by viral infections. Epstein-Bar...
journal_title:Virus research
pub_type: 杂志文章,评审
doi:10.1016/j.virusres.2020.197962
更新日期:2020-07-02 00:00:00
abstract::Satellite RNAs (satRNAs) and viroids belong to the group called subviral agents and are the smallest pathogens of plants. In general, small satRNAs and viroids are 300-400 nt in size and do not encode any functional proteins; they are thus regarded as so-called long noncoding RNAs (lncRNAs). These lncRNAs are receivin...
journal_title:Virus research
pub_type: 杂志文章,评审
doi:10.1016/j.virusres.2015.06.016
更新日期:2016-01-02 00:00:00
abstract::Bovine enteroviruses, which belong to the Picornaviridae family, can cause clinical symptoms in cattle and are excreted in feces. In this study, a cytolytic virus was isolated from Madin-Darby bovine kidney (MDBK) cells from fecal samples of bovine with severe diarrhea and hemorrhagic intestinal mucosa that had been o...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/j.virusres.2014.07.032
更新日期:2014-10-13 00:00:00
abstract::MicroRNAs (miRNAs) constitute an important class of non-coding RNA implicated in gene expression regulation. More than 1900 miRNA molecules have been identified in humans and their modulation during viral infection and it is recognized to play a role in latency regulation or in establishing an antiviral state. The liv...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/j.virusres.2014.11.010
更新日期:2015-01-22 00:00:00
abstract::Sequence analyses of VP3 gene segments of Wongorr virus isolates from the Northern Territory of Australia were compared with the cognate gene segments from Picola and Paroo River viruses. Previous serological investigations had demonstrated some relationships between these viruses, however VP3 gene sequence and phylog...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/0168-1702(96)01344-5
更新日期:1996-10-01 00:00:00
abstract::Human rabies cases have been on the rise during the past few years in China and a total of 2651 cases were reported in 2004. To better understand the current rabies epidemics in China, we isolated rabies viruses from dogs and humans from five provinces and characterized these isolates genetically by sequencing the ent...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/j.virusres.2006.05.010
更新日期:2006-11-01 00:00:00
abstract::Viruses frequently spread among cells or hosts in groups, with multiple viral genomes inside the same infectious unit. These collective infectious units can consist of multiple viral genomes inside the same virion, or multiple virions inside a larger structure such as a vesicle. Collective infectious units deliver mul...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/j.virusres.2019.03.013
更新日期:2019-05-01 00:00:00
abstract::We selected Chinese hamster ovary (CHO) cell-adapted strains of human enterovirus 71 (HEV71) belonging to sub-genogroups B5 (HEV71-B5) and C2 (HEV71-C2) by serial passage in CHO cells at a high multiplicity of infection. During the course of CHO cell passage, virus growth improved significantly, with increasing virus ...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/j.virusres.2012.02.009
更新日期:2012-05-01 00:00:00
abstract::Norovirus (NoV) is a major pathogenic agent of human acute viral gastroenteritis that occurs worldwide. In March 2017, a series of acute NoV-associated gastroenteritis outbreaks occurred in Hubei Province in central China. Here, we sought to better understand the main genotypes and potential evolutionary advantages of...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/j.virusres.2018.03.016
更新日期:2018-04-02 00:00:00
abstract::Severe Combined Immune Deficiency mouse tumors, induced by inoculating peripheral blood mononuclear cells from 11 healthy human donors (hu-PBMC-SCID tumors), were used to analyse Epstein-Barr virus (EBV) type and strain variations. PCR analysis of EBNA 2- and EBNA 3C-specific sequences showed that EBV type A was prese...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/0168-1702(95)00005-b
更新日期:1995-05-01 00:00:00
abstract::We have recently identified and sequenced a molecular clone of the serogroup 2 simian retrovirus (SRV), D2/RHE/OR/V1, that retains an enhanced ability to infect specific T cell lines. In this report, using deletion mutagenesis, we localized the psi packaging signal, necessary for packaging of D2/RHE/OR/V1 particles, t...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/s0168-1702(01)00236-2
更新日期:2001-06-01 00:00:00
abstract::Rat theilovirus (RTV) is a cardiovirus related to Theiler's murine encephalomyelitis virus. While RTV is a prevalent viral pathogen of rats used in biomedical research, the pathogenesis and characterization of RTV infections is not well understood. In the studies reported herein, we used immunohistochemistry to identi...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/j.virusres.2011.07.014
更新日期:2011-09-01 00:00:00
abstract::The Herpes simplex virus type-1 (HSV-1) regulatory protein ICP0, a RING-finger E3 ubiquitin ligase, stimulates the onset of viral lytic replication and the reactivation of quiescent viral genomes from latency. Like many ubiquitin ligases ICP0 induces its own ubiquitination, a process that can lead to its proteasome-de...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/j.virusres.2008.05.017
更新日期:2008-10-01 00:00:00
abstract::Human papillomavirus (HPV) infection leads to aneuploidy, a numerical chromosomal aberration that is caused by dysregulation of chromosomal segregation. We previously found that the E7 proteins of high-risk HPVs, but not of low-risk HPVs, could bind to centromere protein-C (CENP-C). In this study, we first found that ...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/j.virusres.2015.04.019
更新日期:2015-07-02 00:00:00
abstract::Mouse hepatitis virus (MHV) nucleocapsid (N) protein binds to the large, single-stranded, positive-sense viral genomic RNA to form a helical nucleocapsid structure in mature virions. In addition N protein binds the intracellular form of the genomic RNA, all of the MHV subgenomic mRNAs, and expressed non-MHV RNA transc...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/j.virusres.2003.08.021
更新日期:2003-12-01 00:00:00
abstract::Over the past three decades diseases caused by whitefly-transmitted geminiviruses (begomoviruses) have emerged to be important constraints to the production of solanaceous crops, particularly tomato (Solanum lycopersicum) and peppers (Capsicum spp.), in many tropical and subtropical regions of the world. The most stud...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/j.virusres.2013.12.026
更新日期:2014-06-24 00:00:00
abstract::We have used the polymerase chain reaction (PCR) to obtain sensitive detection and identification of poliovirus RNA genomes. Primer pairs were designed to permit identification of each Sabin poliovaccine strain by the electrophoretic mobilities of the amplified DNA products (Sabin 1: 97 bp; Sabin 2: 71 bp; Sabin 3: 44...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/0168-1702(91)90107-7
更新日期:1991-07-01 00:00:00
abstract::A recombinant baculovirus containing a cDNA which encodes haemagglutinin-neuraminidase (HN) of Newcastle disease virus (NDV) was constructed. Spodoptera frugiperda cells infected with this recombinant virus produced a large amount of HN glycoprotein similar to the authentic HN in size. The recombinant HN glycoprotein ...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/0168-1702(91)90059-5
更新日期:1991-06-01 00:00:00
abstract::Mimivirus' genome includes parts of 5S, 16S and 23S ribosomal RNAs encoded by Acanthamoeba's mitogenome, the giant virus' host. Two non-exclusive hypotheses for rRNA remnants in giant viruses are examined: 1. mitogenomes invade viral genomes as they do for nuclear chromosomes (producing numts); 2. megaviral genomes ev...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/j.virusres.2018.06.004
更新日期:2018-07-15 00:00:00
abstract::We determined the nucleotide sequence of a 3,811 base pair (bp) region of the bovine herpesvirus type-1 (BHV-1) HindIII-A fragment covering map units 0.429-0.456, which contained the HSV-1 homologues of the UL25, UL26 and UL26.5 genes. Sequence overlap was verified with previously published BHV-1 sequences, resulting ...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/s0168-1702(96)01420-7
更新日期:1997-04-01 00:00:00
abstract::Meliacine (MA), an antiviral principle present in partially purified leaf extracts of Melia azedarach L., prevents the development of herpetic stromal keratitis (HSK) in mice by diminishing the viral load in the eye and the severity of lesions caused by a virus-induced immunopathological reaction. The tetranortriterpe...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/j.virusres.2008.12.013
更新日期:2009-04-01 00:00:00
abstract::For detection of spring viremia of carp virus (SVCV) DNA probes have been constructed using the reverse transcription-polymerase chain reaction (RT-PCR) amplification technique and cDNA cloning in plasmid and phage vectors. The specific primers for amplification of SVCV M and G genes were chosen and synthesized. Studi...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/s0168-1702(99)00052-0
更新日期:1999-09-01 00:00:00
abstract::Five premature termination mutations and five missense mutations were introduced into the portion of cloned Moloney murine leukemia virus (M-MuLV) DNA encoding the Env cytoplasmic domain. All of the mutant DNAs gave rise to replication-competent virus after transfection of NIH/3T3 cells, but several of the mutant DNAs...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/0168-1702(95)01278-8
更新日期:1996-03-01 00:00:00
abstract::The positive sense genomes of members of the genus Flavivirus in the family Flaviviridae are ∼ 11 kb in length and have a 5' type I cap but no 3' poly-A. The 3' and 5' terminal regions contain short conserved sequences that are proposed to be repeated remnants of an ancient sequence. However, the functions of most of ...
journal_title:Virus research
pub_type: 杂志文章,评审
doi:10.1016/j.virusres.2015.02.006
更新日期:2015-08-03 00:00:00
abstract::In this study we demonstrated that Macrobrachium rosenbergii nodavirus (MrNV) was able to internalize and replicate in Sf9 insect cells, with levels of infection altered by substances affecting the caveolin-(CAV) mediated endocytosis pathway. The use of Sf9 cells for efficient MrNV replication and propagation was demo...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/j.virusres.2016.06.012
更新日期:2016-09-02 00:00:00