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M9480122.TXT
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1994-08-09
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Document 0122
DOCN M9480122
TI Definition of the range and distribution of human immunodeficiency virus
macrophage tropism using PCR-based infectivity measurements.
DT 9410
AU Collin M; Illei P; James W; Gordon S; Sir William Dunn School of
Pathology, University of Oxford, U.K.
SO J Gen Virol. 1994 Jul;75 ( Pt 7):1597-603. Unique Identifier : AIDSLINE
MED/94292910
AB The tropism of human immunodeficiency virus (HIV) for macrophages (m
phi) is a well recognized phenomenon, but the range and distribution of
m phi-tropic phenotypes have not been defined by quantitative means.
This study uses a PCR-based infectivity assay to derive an index of m
phi tropism for several common strains of HIV. The results show that m
phi tropism varies over about six orders of magnitude and that the most
m phi-tropic strains have a higher infectivity for m phi than for
peripheral blood lymphocytes. Strains were distributed throughout this
range, suggesting that m phi tropism is a continuously variable
phenotypic property. Although the degree of tropism was strongly
influenced by the mode of isolation and propagation of virus strains,
there was no evidence for the existence of distinct m phi-tropic or
non-m phi-tropic phenotypes. Finally, the tropism of two selected
strains was found to be determined by an early step in replication,
probably virus entry.
DE Base Sequence Cell Line Comparative Study Human
HIV/GENETICS/IMMUNOLOGY/*PHYSIOLOGY HIV Core Protein p24/ANALYSIS
Macrophage Activation Macrophages/IMMUNOLOGY/*MICROBIOLOGY Molecular
Sequence Data *Polymerase Chain Reaction Species Specificity Support,
Non-U.S. Gov't T-Lymphocytes/MICROBIOLOGY Virus Replication JOURNAL
ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).