CCR7 ligands CCL19 and CCL21 increase permissiveness of resting memory CD4+ T cells to HIV-1 infection: a novel model of HIV-1 latency

Suha Mahdi Saleh, Ajantha Solomon, Fiona Wightman, Miranda Shehu-Xhilaga, Paul Urquhart Cameron, Sharon R Lewin

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194 Citations (Scopus)


Latent HIV-1 infection of resting memory CD4(+) T cells represents the major barrier to HIV-1 eradication. To determine whether the CCR7 ligands involved in lymphocyte migration can alter HIV-1 infection of resting CD4(+) T cells, we infected purified resting CD4(+) T cells after incubation with the chemokines CCL19 and CCL21. Incubation with CCL19 or CCL21 did not alter markers of T-cell activation or proliferation. However, after HIV-1 infection of CCL19- or CCL21-treated CD4(+) T-cells, we observed low-level HIV-1 production but high concentrations of integrated HIV-1 DNA, approaching that seen in mitogen-stimulated T-cell blasts. Restimulation of CCL19-treated infected CD4(+) T cells resulted in virus production consistent with establishment of postintegration latency. CCR7 ligands facilitate efficient entry of HIV-1 into resting CD4(+) T cells. These studies demonstrate a unique action of the chemokines CCL19 and CCL21 and provide a novel model with which to study HIV-1 latency in vitro.
Original languageEnglish
Pages (from-to)4161 - 4164
Number of pages4
Issue number13
Publication statusPublished - 2007

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