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1996-02-27
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Document 0627
DOCN M9630627
TI Characterization of a CD4-expressing macaque cell line that can detect
virus after a single replication cycle and can be infected by diverse
simian immunodeficiency virus isolates.
DT 9603
AU Chackerian B; Haigwood NL; Overbaugh J; Department of Microbiology,
University of Washington, Seattle; 98195, USA.
SO Virology. 1995 Nov 10;213(2):386-94. Unique Identifier : AIDSLINE
MED/96074514
AB Primate lentiviruses such as human immunodeficiency virus (HIV) and
simian immunodeficiency virus (SIV) are phenotypically diverse, and
virus isolates vary in cytopathicity, replication rate, and cell
tropism. While all virus isolates infect primary peripheral blood
lymphocytes, only a subset of strains infect established CD4-expressing
T-cell lines. Here, we describe the development and characterization of
a macaque cell line that can be infected by all of the strains of SIV
that we have tested, including macrophage- and T-cell-tropic strains,
primary and cell-line adapted strains, and SIVmac, SIVMne, and SIVsm
isolates. The cells can be infected by strains of HIV type 2 (HIV-2) to
varying degrees, but not by either cloned or primary isolates of HIV
type 1 (HIV-1). This cell line is a derivative of a rhesus macaque
mammary tumor cell line (CMMT) engineered to express human CD4. For
these studies, a CMMT-CD4 clone expressing an integrated copy of a
truncated HIV-1 long terminal repeat fused to the beta-galactosidase
gene (LTR-beta-gal) was established to allow detection of infectious SIV
after a single round of replication. Here, we demonstrate the ability of
the CMMT-CD4-LTR-beta-gal cell line to rapidly and quantitatively detect
infectious SIV. Using these cells to assay virus, we could readily
measure neutralizing antibody activity in animals infected with
different SIV isolates. Neutralizing activity was detected against the
homologous virus and lower, but detectable, activity was measured
against heterologous virus. Thus, this system, which is highly sensitive
and can detect infection by all of the SIV isolates we tested, is a
rapid method for detecting infectious virus and quantitating
neutralizing antibody activity.
DE beta-Galactosidase/GENETICS Animal Antigens, CD4/*ANALYSIS Clone
Cells Genetic Engineering Human HIV Long Terminal Repeat
HIV-1/PHYSIOLOGY HIV-2/PHYSIOLOGY Macaca mulatta Macaca nemestrina
Mammary Neoplasms/PATHOLOGY Neutralization Tests Simian Acquired
Immunodeficiency Syndrome/IMMUNOLOGY Support, U.S. Gov't, P.H.S.
SIV/IMMUNOLOGY/ISOLATION & PURIF/*PHYSIOLOGY Tumor Cells,
Cultured/*VIROLOGY Virion/METABOLISM *Virus Replication
Zidovudine/PHARMACOLOGY JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).