CTL clonotypes with higher TCR affinity have better ability to reduce the HIV latent reservoir

Noemia S. Lim, Hiroshi Takata, Szu Han Huang, Alexander Haregot, Julie Mitchell, Stephen Blackmore, Ayanna Garland, Aaron Sy, Pearline Cartwright, Jean Pierre Routy, Nelson L. Michae, Victor Appay, R. Brad Jones, Lydie Trautmann

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

The success of the shock and kill strategy for the HIV cure depends both on the reactivation of the latent reservoir and on the ability of the immune system to eliminate infected cells. As latency reversal alone has not shown any impact in the size of the latent reservoir, ensuring that effector CTLs are able to recognize and kill HIV-infected cells could contribute to reservoir reduction. In this study, we investigated which functional aspects of human CTLs are associated with a better capacity to kill HIV-infected CD4+T cells. We isolated Gag- and Nef-specific CTL clones with different TCR sequences from the PBMC of donors in acute and chronic infection. High-affinity clonotypes that showed IFN-g production preserved even when the CD8 coreceptor was blocked, and clones with high Ag sensitivity exhibited higher efficiency at reducing the latent reservoir. Although intrinsic cytotoxic capacity did not differ according to TCR affinity, clonotypes with high TCR affinity showed a better ability to kill HIVinfected CD4+T cells obtained from in vivo-infected PBMC and subjected to viral reactivation. Strategies aiming to specifically boost and maintain long-living memory CTLs with high TCR affinity in vivo prior to latency-reversing treatment might improve the efficacy of the shock and kill approach to reduce the latent reservoir.

Original languageEnglish (US)
Pages (from-to)699-707
Number of pages9
JournalJournal of Immunology
Volume205
Issue number3
DOIs
StatePublished - Aug 1 2020

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology

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