home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Collection of Education
/
collectionofeducationcarat1997.iso
/
HEALTH
/
MED9602.ZIP
/
M9620119.TXT
< prev
next >
Wrap
Text File
|
1996-02-26
|
3KB
|
43 lines
Document 0119
DOCN M9620119
TI Human immunodeficiency virus envelope V1 and V2 regions influence
replication efficiency in macrophages by affecting virus spread.
DT 9602
AU Toohey K; Wehrly K; Nishio J; Perryman S; Chesebro B; Laboratory of
Persistent Viral Diseases, Rocky Mountain; Laboratories, National
Institute of Allergy and Infectious; Diseases, Hamilton, Montana 59840,
USA.
SO Virology. 1995 Oct 20;213(1):70-9. Unique Identifier : AIDSLINE
MED/96036481
AB The V3 hypervariable region of the HIV-1 envelope protein is a major
determinant of viral tropism for macrophages. However, the replication
of macrophage-tropic HIV-1 strains varies considerably in macrophages,
and this variability has been linked to the V1 and V2 envelope regions.
In the present study, recombinant HIV clones were generated by inserting
V1 and V2 sequences from the Ba-L HIV isolate, which has a high
macrophage replication level, into the genomic background of a
macrophage-tropic clone with a low macrophage replication level.
Infection of macrophages with varying multiplicities of infection and
direct detection of the number of infected macrophages per culture
showed that the Ba-L V1 and V2 envelope sequences enhanced the ability
of virus to spread in the cultures. In contrast, macrophage-tropic
clones with low replication efficiency infected macrophages initially
but showed no evidence of spread to additional cells during the culture
period. This effect on virus spread appeared to be macrophage-specific
as it was not observed in cultures of T lymphocytes. Comparison of
recombinant clones containing V1, V2, and V3 envelope sequences from
high-efficiency Ba-L and JR-FL strains indicated that markedly different
V1 and V2 sequences could impart the same rapidly spreading phenotype in
macrophages.
DE Amino Acid Sequence Base Sequence Cells, Cultured Chimeric Proteins
CD4-Positive T-Lymphocytes/VIROLOGY DNA Primers/CHEMISTRY DNA,
Viral/GENETICS Enzyme-Linked Immunosorbent Assay Genes, env Hela
Cells/VIROLOGY Human HIV Core Protein p24/ANALYSIS HIV Envelope
Protein gp120/CHEMISTRY/GENETICS/*PHYSIOLOGY HIV-1/GENETICS/*PHYSIOLOGY
Immunoenzyme Techniques Macrophages/*VIROLOGY Molecular Sequence Data
Phenotype T-Lymphocytes/VIROLOGY *Virus Replication JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).