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J. Virol., 01 1998, 396-404, Vol 72, No. 1
A Trkola, WA Paxton, SP Monard, JA Hoxie, MA Siani, DA Thompson, L Wu, CR Mackay, R Horuk and JP Moore
We have studied the breadth and potency of the inhibitory actions of the CC
chemokines macrophage inhibitory protein 1alpha (MIP-1alpha), MIP-1beta,
and RANTES against macrophage-tropic (M-tropic) primary isolates of human
immunodeficiency virus type 1 (HIV-1) and of the CXC chemokine stromal
cell-derived factor 1alpha against T-cell-tropic (T- tropic) isolates,
using mitogen-stimulated primary CD4+ T cells as targets. There was
considerable interisolate variation in the sensitivity of HIV-1 to
chemokine inhibition, which was especially pronounced for the CC chemokines
and M-tropic strains. However, this variation was not obviously dependent
on the genetic subtype (A through F) of the virus isolates. Peripheral
blood mononuclear cell donor- dependent variation in chemokine inhibition
potency was also observed. Among the CC chemokines, the rank order for
potency (from most to least potent) was RANTES, MIP-1beta, MIP-1alpha. Some
M-tropic isolates, unexpectedly, were much more sensitive to RANTES than to
MIP-1beta, whereas other isolates showed sensitivities comparable to those
of these two chemokines. Down-regulation of the CCR5 and CXCR4 receptors
occurred in cells treated with the cognate chemokines and probably
contributes to anti-HIV-1 activity. Thus, for CCR5, the rank order for
down-regulation was also RANTES, MIP-1beta, MIP-1alpha.
Copyright © 1998, American Society for Microbiology
Genetic subtype-independent inhibition of human immunodeficiency virus type 1 replication by CC and CXC chemokines
The Aaron Diamond AIDS Research Center, The Rockefeller University, New York, New York 10021, USA.
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