Linked Life Data

12367752

Source:http://linkedlifedata.com/resource/pubmed/id/12367752

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2002-10-7
pubmed:abstractText
The replication-deficient vaccinia virus (VV) MVA-T7 produces large amounts of T7 RNA polymerase and permits efficient protein expression from cDNA of T7-promoted genes. Yet, unlike recombinant VV vTF7-3, (VV) MVA-T7 produces no cytopathic effect in primate cells, thus allowing the study of processes with slow kinetics. We have applied MVA-T7 to aid genome expression of HAV, a representative of the Picornaviridae family that is well known for its inefficient replication in mammalian cell cultures. After cDNA transfection and MVA-T7 infection, empty capsids and mature HAV particles were formed with different kinetics and were characterized by their morphology, protein content, and infectivity. The data suggests that HAV genome replication is initiated from RNA, which was transcribed in vivo by the MVA-T7-encoded T7 RNA polymerase. HAV genome replication was also demonstrated in a recombination assay. After co-expression of two subgenomic HAV cDNAs, both by themselves unable to complete the viral life cycle, infectious HAV was rescued, indicating that replication-dependent genetic recombination has occurred. We propose that the high-level genome expression mediated in vivo by the VV-encoded T7 RNA polymerase augments the amount of viral RNA, such that replication of viruses poorly replicating in cell cytoplasm is detectable.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
0168-1702
pubmed:author
pubmed:issnType
Print
pubmed:volume
89
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
75-88
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2002
pubmed:articleTitle
A vaccinia virus MVA-T7-mediated recovery of infectious hepatitis A virus from full-size cDNA or from two cDNAs, both by themselves unable to complete the virus life cycle.
pubmed:affiliation
Institute of Medical Molecular Biology, Medical University of Lübeck, Ratzeburger Allee 160, D-23538 Lübeck, Germany. koussov@molbio.mu-luebeck.de
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't