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Veenhuis RT, Garliss CC, Bailey JR, Blankson JN. CD8 Effector T Cells Function Synergistically With Broadly Neutralizing Antibodies to Enhance Suppression of HIV Infection. Front Immunol 2021; 12:708355. [PMID: 34394110 PMCID: PMC8358597 DOI: 10.3389/fimmu.2021.708355] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Accepted: 07/16/2021] [Indexed: 11/13/2022] Open
Abstract
HIV-specific CD8 T cells and broadly neutralizing antibodies (bNAbs) both contribute to the control of viremia, but in most cases, neither can completely suppress viral replication. To date, therapeutic vaccines have not been successful in eliciting HIV-specific CD8 T cell or bNAb responses that are capable of preventing long-term viral rebound upon ART cessation. These challenges suggest that a combinatorial approach that harnesses both bNAbs and CD8 T cell responses may be necessary for long term control of viral replication. In this study we demonstrate a synergistic interaction between CD8 T cells and bNAbs using an in vitro model. Our data suggest that this combinatorial approach is very effective at suppressing viral replication in vitro and should be considered in future therapeutic studies.
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Affiliation(s)
- Rebecca T Veenhuis
- Department of Molecular and Comparative Pathobiology, Johns Hopkins Medicine, Baltimore, MD, United States
| | - Caroline C Garliss
- Department of Medicine, Johns Hopkins Medicine, Baltimore, MD, United States
| | - Justin R Bailey
- Department of Medicine, Johns Hopkins Medicine, Baltimore, MD, United States
| | - Joel N Blankson
- Department of Molecular and Comparative Pathobiology, Johns Hopkins Medicine, Baltimore, MD, United States.,Department of Medicine, Johns Hopkins Medicine, Baltimore, MD, United States
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Chan HY, Zhang J, Garliss CC, Kwaa AK, Blankson JN, Smith KN. A T Cell Receptor Sequencing-Based Assay Identifies Cross-Reactive Recall CD8 + T Cell Clonotypes Against Autologous HIV-1 Epitope Variants. Front Immunol 2020; 11:591. [PMID: 32318072 PMCID: PMC7154155 DOI: 10.3389/fimmu.2020.00591] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Accepted: 03/13/2020] [Indexed: 12/31/2022] Open
Abstract
HIV-1 positive elite controllers or suppressors control viral replication without antiretroviral therapy, likely via CTL-mediated elimination of infected cells, and therefore represent a model of an HIV-1 functional cure. Efforts to cure HIV-1 accordingly rely on the existence or generation of antigen-specific cytotoxic T lymphocytes (CTL) to eradicate infected cells upon reversal of latency. Detecting and quantifying these HIV-1-specific CTL responses will be crucial for developing vaccine and T cell-based immunotherapies. A recently developed assay, called MANAFEST, uses T cell receptor (TCR) Vβ sequencing of peptide-stimulated cultures followed by a bioinformatic pipeline to identify neoantigen-specific T cells in cancer patients. This assay is more sensitive than conventional immune assays and therefore has the possibility to identify HIV-1 antigenic targets that have not been previously explored for vaccine or T cell immunotherapeutic strategies. Here we show that a modified version of the MANAFEST assay, called ViraFEST, can identify memory CD8+ T cell responses against autologous HIV-1 Gag and Nef epitope variants in an elite suppressor. Nine TCR Vβ clonotypes were identified and 6 of these were cross-reactive for autologous variants or known escape variants. Our findings are a proof of principle that the ViraFEST assay can be used to detect and monitor these responses for downstream use in immunotherapeutic treatment approaches.
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Affiliation(s)
- Hok Yee Chan
- Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins School of Medicine, Baltimore, MD, United States.,Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins School of Medicine, Baltimore, MD, United States
| | - Jiajia Zhang
- Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins School of Medicine, Baltimore, MD, United States.,Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins School of Medicine, Baltimore, MD, United States
| | - Caroline C Garliss
- Department of Medicine, Johns Hopkins School of Medicine, Baltimore, MD, United States
| | - Abena K Kwaa
- Department of Medicine, Johns Hopkins School of Medicine, Baltimore, MD, United States
| | - Joel N Blankson
- Department of Medicine, Johns Hopkins School of Medicine, Baltimore, MD, United States.,Department of Molecular and Comparative Pathobiology, Johns Hopkins School of Medicine, Baltimore, MD, United States
| | - Kellie N Smith
- Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins School of Medicine, Baltimore, MD, United States.,Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins School of Medicine, Baltimore, MD, United States
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Abstract
: Elite controllers or suppressors control viral replication without antiretroviral therapy. We used the intact proviral DNA assay to approximate the size of the inducible latent reservoir in elite suppressors and found that, while the median frequency of both total and intact proviral DNA was markedly lower than the frequencies seen in chronic progressors on antiretroviral therapy there was no significant difference in the ratio of intact to total proviral DNA between elite suppressors and chronic progressors.
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Affiliation(s)
- Abena Kr Kwaa
- Department of Medicine, Center For AIDS Research, Johns Hopkins Medicine
| | - Caroline C Garliss
- Department of Medicine, Center For AIDS Research, Johns Hopkins Medicine
| | | | | | - Joel N Blankson
- Department of Medicine, Center For AIDS Research, Johns Hopkins Medicine
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