Journal of Virology, November 1998, p. 8943-8951, Vol. 72, No. 11
0022-538X/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.
School of Animal and Microbial Sciences,
Received 8 May 1998/Accepted 4 August 1998
We monitored the primary humoral response to human immunodeficiency
virus type 1 infection and showed that, in addition to antibodies to
p24 and gp41, antigens which form the basis of most diagnostic assays,
the response included a significant antibody response directed to the
gp120 region of the infecting viral quasispecies. When tested in a
recombinant virus neutralization assay, these antibodies were capable
of inhibiting viral growth. We found the primary viral quasispecies to
solely utilize the CCR-5 chemokine receptor; however, recombinant
viruses differed in their cytopathology and in their sensitivity to
-chemokine inhibition of viral growth. Sequence analysis of the
gp120 open reading frames showed that amino acid changes in the C1
(D
G at position 62) and C4 (V
A at position 430) regions accounted
for the phenotypic differences. These data demonstrate that early in
infection, polymorphism exists in envelope glycoprotein
coreceptor interactions and imply that therapeutic strategies targeted
at this step in the viral life cycle may lead to rapid resistance.
*
Corresponding author. Mailing address: Department of
Virology, The Windeyer Institute of Medical Sciences, UCLMS, 46 Cleveland St., London W1P 6DB, United Kingdom. Phone: 44 171 504 9490. Fax: 44 171 580 5896. E-mail: p.balfe{at}ucl.ac.uk.
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