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Journal of Virology, August 2000, p. 6893-6910, Vol. 74, No. 15
Aaron Diamond AIDS Research Center, The Rockefeller
University, New York, New York 100161;
National Center for Infectious Diseases, DASTLR, Centers
for Disease Control and Prevention, Atlanta, Georgia
303332; and Tulane University
Medical Center, New Orleans, Louisiana 704333
Received 21 January 2000/Accepted 2 May 2000
We have used coreceptor-targeted inhibitors to investigate which
coreceptors are used by human immunodeficiency virus type 1 (HIV-1),
simian immunodeficiency viruses (SIV), and human immunodeficiency virus
type 2 (HIV-2) to enter peripheral blood mononuclear cells (PBMC). The
inhibitors are TAK-779, which is specific for CCR5 and CCR2,
aminooxypentane-RANTES, which blocks entry via CCR5 and CCR3, and
AMD3100, which targets CXCR4. We found that for all the HIV-1 isolates
and all but one of the HIV-2 isolates tested, the only relevant
coreceptors were CCR5 and CXCR4. However, one HIV-2 isolate replicated
in human PBMC even in the presence of TAK-779 and AMD3100, suggesting
that it might use an undefined, alternative coreceptor that is
expressed in the cells of some individuals. SIVmac239 and
SIVmac251 (from macaques) were also able to use an
alternative coreceptor to enter PBMC from some, but not all, human and
macaque donors. The replication in human PBMC of SIVrcm
(from a red-capped mangabey), a virus which uses CCR2 but not CCR5 for
entry, was blocked by TAK-779, suggesting that CCR2 is indeed the
paramount coreceptor for this virus in primary cells.
0022-538X/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.
Use of Inhibitors To Evaluate Coreceptor Usage by
Simian and Simian/Human Immunodeficiency Viruses and Human
Immunodeficiency Virus Type 2 in Primary Cells
*
Corresponding author. Present address: Weill Medical
College of Cornell University, 1300 York Ave., New York, NY 10021. Phone: (212) 746-4462. Fax: (212) 746-8340. E-mail:
jpm2003{at}med.cornell.edu.
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