home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
The Pier Shareware 6
/
The_Pier_Shareware_Number_6_(The_Pier_Exchange)_(1995).iso
/
026
/
med9410a.zip
/
M94A0169.TXT
< prev
next >
Wrap
Text File
|
1994-10-01
|
3KB
|
48 lines
Document 0169
DOCN M94A0169
TI Construction and in vitro properties of SIVmac mutants with deletions in
nonessential genes.
DT 9412
AU Gibbs JS; Regier DA; Desrosiers RC; Harvard Medical School, New England
Regional Primate Research; Center, Southborough, Massachusetts
01772-9102.
SO AIDS Res Hum Retroviruses. 1994 Apr;10(4):333-42. Unique Identifier :
AIDSLINE MED/94347457
AB The so-called nonessential genes of primate lentiviruses can be deleted
without abrogating the ability of virus to replicate under at least some
cell culture conditions. In SIVmac, these genes are vif, vpx, vpr, and
nef. Sequences in the upstream region of U3 in the LTR have also been
shown to be dispensable for replication in cell culture. We report here
the construction and characterization of a panel of 40 single and
combination deletion mutants derived from the pathogenic molecular clone
SIVmac239. Deletion of the vpr gene caused little or no change in the
growth properties of SIVmac239 in CEMx174 cells, in rhesus monkey
peripheral blood mononuclear cells (PBMCs), or in rhesus monkey alveolar
macrophages. Deletion of the vpx gene resulted in a greatly reduced rate
of replication of the virus in the primary PBMC and macrophage cultures,
but no significant reduction in replication of the virus in CEMx174
cells. Deletion of the vpx gene appeared to have a greater effect on
virus replication in macrophages than in PBMCs. Deletion of the vif gene
caused a dramatic reduction in replication in all cell types tested.
However, even delta 5, which contains deletions in all five targeted
regions (vif, vpx, vpr, nef, and U3), can still replicate in CEMx174
cells albeit with greatly delayed kinetics. Deletion of nef, alone or in
combination with deletions in U3 and vpr, had no observable effect on
replication of the virus in any of the cells tested. Because the disease
induced by the parental SIVmac239 clone in rhesus monkeys has been well
characterized and is remarkably similar to AIDS in humans, this
collection of mutants will be useful for relating in vitro properties
and gene function with in vivo pathogenic potential.
DE Amino Acid Sequence Animal Base Sequence Cell Line DNA
Primers/GENETICS DNA, Viral/GENETICS *Gene Deletion Genes, nef
Genes, vif Genes, vpr *Genes, Viral In Vitro Leukocytes,
Mononuclear/MICROBIOLOGY Macaca mulatta Macrophages,
Alveolar/MICROBIOLOGY Molecular Sequence Data Mutagenesis,
Site-Directed Support, U.S. Gov't, P.H.S.
SIV/*GENETICS/PHYSIOLOGY/PATHOGENICITY Viral Proteins/GENETICS Virus
Replication/GENETICS JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).