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Fuchs A, Wasser A, Faua C, Caspar S, Jegou F, Velay A, Laugel E, Ursenbach A, Rey D, Fafi-Kremer S, Gantner P. Comparison of HIV-1 DNA load measurements in blood and in relation to successful proviral sequencing. Infect Dis Now 2024; 54:104845. [PMID: 38103598 DOI: 10.1016/j.idnow.2023.104845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 09/15/2023] [Accepted: 12/08/2023] [Indexed: 12/19/2023]
Abstract
OBJECTIVE HIV DNA sequencing is now routinely used for HIV-infected individuals on antiretroviral therapy (ART) with or without partial genotypic history. Successful amplification of HIV pol gene has yet to be correlated with HIV DNA levels. Here, we assessed the relationship between HIV DNA load and sequencing results. METHODS We analyzed three different qPCR measurements of total (LTR and LTR-gag) and integrated (Alu-LTR) HIV DNA in blood samples collected from viremic as well as virally suppressed HIV-infected individuals on ART. HIV DNA levels were compared to HIV DNA Sanger sequencing and clinical and therapeutic parameters. RESULTS Among the 135 individuals analyzed for HIV DNA measurements and sequencing, all three HIV DNA measurements were associated with HIV DNA Sanger sequencing results. A threshold of around 2 and 1.5 log copies/million leukocytes of total HIV DNA was identified for LTR and LTR-gag qPCRs, respectively. Integrated HIV DNA positivity was also associated with successful sequencing. We further compared HIV DNA measurement techniques in an extended cohort of 312 individuals and showed that all measurements correlated between the different techniques, regardless of the HIV-1 subtypes analyzed. However, higher detection rates were observed with LTR (96%) compared to LTR-gag (86%) and Alu-LTR (59%) qPCRs. Duration of virological control on ART and CD4 nadir were the main determinants of HIV reservoir size. CONCLUSIONS HIV DNA measurement is associated with Sanger sequencing success, regardless of the technique used. In a clinical setting, Application of HIV DNA quantification before sequencing should be further evaluated.
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Affiliation(s)
- Anne Fuchs
- Clinical Virology Laboratory, Strasbourg University Hospital, Strasbourg, France
| | - Antoine Wasser
- Clinical Virology Laboratory, Strasbourg University Hospital, Strasbourg, France
| | - Clayton Faua
- INSERM UMR_S1109, Strasbourg University, Strasbourg, France
| | - Stéphanie Caspar
- Clinical Virology Laboratory, Strasbourg University Hospital, Strasbourg, France
| | - Frédéric Jegou
- Clinical Virology Laboratory, Strasbourg University Hospital, Strasbourg, France
| | - Aurélie Velay
- Clinical Virology Laboratory, Strasbourg University Hospital, Strasbourg, France; INSERM UMR_S1109, Strasbourg University, Strasbourg, France
| | - Elodie Laugel
- Clinical Virology Laboratory, Strasbourg University Hospital, Strasbourg, France; INSERM UMR_S1109, Strasbourg University, Strasbourg, France
| | - Axel Ursenbach
- Le Trait d'Union, HIV-Infection Care Center, Strasbourg University Hospital, Strasbourg, France
| | - David Rey
- Le Trait d'Union, HIV-Infection Care Center, Strasbourg University Hospital, Strasbourg, France
| | - Samira Fafi-Kremer
- Clinical Virology Laboratory, Strasbourg University Hospital, Strasbourg, France; INSERM UMR_S1109, Strasbourg University, Strasbourg, France
| | - Pierre Gantner
- Clinical Virology Laboratory, Strasbourg University Hospital, Strasbourg, France; INSERM UMR_S1109, Strasbourg University, Strasbourg, France.
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Rauschning D, Ehren I, Heger E, Knops E, Fätkenheuer G, Suárez I, Lehmann C. Optimizing Antiretroviral Therapy in Heavily ART-Experienced Patients with Multi-Class Resistant HIV-1 Using Proviral DNA Genotypic Resistance Testing. Viruses 2023; 15:1444. [PMID: 37515133 PMCID: PMC10384096 DOI: 10.3390/v15071444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 06/20/2023] [Accepted: 06/22/2023] [Indexed: 07/30/2023] Open
Abstract
Resistance to multiple antiretroviral drugs among people living with HIV (PLWH) can result in a high pill burden, causing toxicity and drug interactions. Thus, the goal is to simplify treatment regimens while maintaining effectiveness. However, former resistance analysis data may not be current or complete. The use of proviral DNA genotyping may assist in selecting appropriate treatment options. A retrospective study was carried out on individuals belonging to the Cologne HIV cohort with a resistance history to two or more antiretroviral (ARV) classes and on non-standard antiretroviral therapy (ART). Patients required former viral RNA and a recent proviral DNA resistance test to be available prior to the switch to ART. Potential discrepancies between resistance test results obtained through RNA and proviral DNA methods and the consequent virological and clinical outcomes following ART adjustments were analyzed. Out of 1250 patients, 35 were eligible for inclusion in this study. The median length of known HIV infection was 27 years, and the median duration of ART was 22 years. Of the 35 participants, 16 had received all five ARV classes. Based on proviral DNA genotyping results, ART was simplified in 17 patients. At the last follow-up examination after changing therapy, 15 patients had HIV RNA <50 copies/mL (median 202 days, range 21-636). The mean number of pills per day decreased from eight to three, and the median intake frequency decreased from two to one time/day (ranges 1-2). Our study supports the use of proviral DNA genotyping as a safe strategy for switching to simplified ART regimens. However, the lack of extensive research on the advantages of proviral DNA genotyping makes it challenging to fully assess its benefits in terms of treatment selection.
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Affiliation(s)
- Dominic Rauschning
- Division of Infectious Diseases, Department I of Internal Medicine, Medical Faculty and University Hospital Cologne, University of Cologne, 50937 Cologne, Germany
- Department Ib of Internal Medicine, Bundeswehrzentralkrankenhaus Koblenz, Rübenacher Straße 170, 56072 Koblenz, Germany
| | - Ira Ehren
- Division of Infectious Diseases, Department I of Internal Medicine, Medical Faculty and University Hospital Cologne, University of Cologne, 50937 Cologne, Germany
| | - Eva Heger
- Institute of Virology, University of Cologne, Faculty of Medicine and University Hospital Cologne, Fürst-Pückler-Straße 56, 50935 Cologne, Germany
| | - Elena Knops
- Institute of Virology, University of Cologne, Faculty of Medicine and University Hospital Cologne, Fürst-Pückler-Straße 56, 50935 Cologne, Germany
| | - Gerd Fätkenheuer
- Division of Infectious Diseases, Department I of Internal Medicine, Medical Faculty and University Hospital Cologne, University of Cologne, 50937 Cologne, Germany
| | - Isabelle Suárez
- Division of Infectious Diseases, Department I of Internal Medicine, Medical Faculty and University Hospital Cologne, University of Cologne, 50937 Cologne, Germany
- Center for Molecular Medicine Cologne (CMMC), Medical Faculty and University Hospital Cologne, University of Cologne, 50937 Cologne, Germany
- Partner Site Bonn-Cologne, German Center for Infection Research (DZIF), 38124 Braunschweig, Germany
| | - Clara Lehmann
- Division of Infectious Diseases, Department I of Internal Medicine, Medical Faculty and University Hospital Cologne, University of Cologne, 50937 Cologne, Germany
- Center for Molecular Medicine Cologne (CMMC), Medical Faculty and University Hospital Cologne, University of Cologne, 50937 Cologne, Germany
- Partner Site Bonn-Cologne, German Center for Infection Research (DZIF), 38124 Braunschweig, Germany
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3
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Chu C, Armenia D, Walworth C, Santoro MM, Shafer RW. Genotypic Resistance Testing of HIV-1 DNA in Peripheral Blood Mononuclear Cells. Clin Microbiol Rev 2022; 35:e0005222. [PMID: 36102816 PMCID: PMC9769561 DOI: 10.1128/cmr.00052-22] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
HIV-1 DNA exists in nonintegrated linear and circular episomal forms and as integrated proviruses. In patients with plasma viremia, most peripheral blood mononuclear cell (PBMC) HIV-1 DNA consists of recently produced nonintegrated virus DNA while in patients with prolonged virological suppression (VS) on antiretroviral therapy (ART), most PBMC HIV-1 DNA consists of proviral DNA produced months to years earlier. Drug-resistance mutations (DRMs) in PBMCs are more likely to coexist with ancestral wild-type virus populations than they are in plasma, explaining why next-generation sequencing is particularly useful for the detection of PBMC-associated DRMs. In patients with ongoing high levels of active virus replication, the DRMs detected in PBMCs and in plasma are usually highly concordant. However, in patients with lower levels of virus replication, it may take several months for plasma virus DRMs to reach detectable levels in PBMCs. This time lag explains why, in patients with VS, PBMC genotypic resistance testing (GRT) is less sensitive than historical plasma virus GRT, if previous episodes of virological failure and emergent DRMs were either not prolonged or not associated with high levels of plasma viremia. Despite the increasing use of PBMC GRT in patients with VS, few studies have examined the predictive value of DRMs on the response to a simplified ART regimen. In this review, we summarize what is known about PBMC HIV-1 DNA dynamics, particularly in patients with suppressed plasma viremia, the methods used for PBMC HIV-1 GRT, and the scenarios in which PBMC GRT has been used clinically.
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Affiliation(s)
- Carolyn Chu
- Department of Family and Community Medicine, University of California San Francisco, San Francisco, California, USA
| | - Daniele Armenia
- UniCamillus, Saint Camillus International University of Health Sciences, Rome, Italy
| | - Charles Walworth
- LabCorp-Monogram Biosciences, South San Francisco, California, USA
| | - Maria M. Santoro
- Department of Experimental Medicine, University of Rome “Tor Vergata”, Rome, Italy
| | - Robert W. Shafer
- Division of Infectious Diseases, Department of Medicine, Stanford University, Stanford, California, USA
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4
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T-Cell Receptor Repertoire Sequencing and Its Applications: Focus on Infectious Diseases and Cancer. Int J Mol Sci 2022; 23:ijms23158590. [PMID: 35955721 PMCID: PMC9369427 DOI: 10.3390/ijms23158590] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Revised: 07/28/2022] [Accepted: 07/29/2022] [Indexed: 11/17/2022] Open
Abstract
The immune system is a dynamic feature of each individual and a footprint of our unique internal and external exposures. Indeed, the type and level of exposure to physical and biological agents shape the development and behavior of this complex and diffuse system. Many pathological conditions depend on how our immune system responds or does not respond to a pathogen or a disease or on how the regulation of immunity is altered by the disease itself. T-cells are important players in adaptive immunity and, together with B-cells, define specificity and monitor the internal and external signals that our organism perceives through its specific receptors, TCRs and BCRs, respectively. Today, high-throughput sequencing (HTS) applied to the TCR repertoire has opened a window of opportunity to disclose T-cell repertoire development and behavior down to the clonal level. Although TCR repertoire sequencing is easily accessible today, it is important to deeply understand the available technologies for choosing the best fit for the specific experimental needs and questions. Here, we provide an updated overview of TCR repertoire sequencing strategies, providers and applications to infectious diseases and cancer to guide researchers’ choice through the multitude of available options. The possibility of extending the TCR repertoire to HLA characterization will be of pivotal importance in the near future to understand how specific HLA genes shape T-cell responses in different pathological contexts and will add a level of comprehension that was unthinkable just a few years ago.
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5
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Palich R, Teyssou E, Sayon S, Abdi B, Soulie C, Cuzin L, Tubiana R, Valantin MA, Schneider L, Seang S, Wirden M, Pourcher V, Katlama C, Calvez V, Marcelin AG. Kinetics of archived M184V mutation in treatment-experienced virally suppressed HIV-infected patients. J Infect Dis 2021; 225:502-509. [PMID: 34415048 DOI: 10.1093/infdis/jiab413] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Accepted: 08/17/2021] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND We aimed to assess the kinetics of drug-resistant viral variants (DRVs) harboring the M184V mutation in the proviral DNA of long-term virally suppressed patients, and factors associated with DRV persistence. METHODS HIV-DNA from blood cells stored in 2019 and 2016 was sequenced using both Sanger and ultradeep sequencing (SS and UDS, with a detection threshold of 1%) in ART-treated patients with HIV-RNA <50 copies/mL for at least 5 years, with past M184V mutation documented in HIV-RNA. RESULTS Among the 79 tested patients, by combining SS and UDS, the M184V was found to be absent in 26/79 (33%) patients (M184V- patients), and persisted in 53/79 (67%) (M184V+ patients). The M184V+ patients had a longer history of ART, a lower CD4 nadir and higher pretherapeutic HIV-RNA. Among the 37 patients with viral sequences assessed by UDS, the proportion of M184V+ DRVs significantly decreased between 2016 and 2019 (40% versus 14%, p=0.005). The persistence of M184V was associated with the duration and level of HIV-RNA replication under 3TC/FTC (p=0.0009 and p=0.009, respectively). CONCLUSION While it decreased over time in HIV-DNA, the M184V mutation was more frequently persistent in the HIV-DNA of more experienced patients with longer past replication under 3TC/FTC.
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Affiliation(s)
- Romain Palich
- Sorbonne University, Infectious Diseases Department, Pitié-Salpêtrière Hospital, AP-HP, Pierre Louis Epidemiology and Public Health Institute (iPLESP), INSERM, Paris, France.,Sorbonne University, Virology Department, Pitié-Salpêtrière Hospital, AP-HP, Pierre Louis Epidemiology and Public Health Institute (iPLESP), INSERM, Paris, France
| | - Elisa Teyssou
- Sorbonne University, Virology Department, Pitié-Salpêtrière Hospital, AP-HP, Pierre Louis Epidemiology and Public Health Institute (iPLESP), INSERM, Paris, France
| | - Sophie Sayon
- Sorbonne University, Virology Department, Pitié-Salpêtrière Hospital, AP-HP, Pierre Louis Epidemiology and Public Health Institute (iPLESP), INSERM, Paris, France
| | - Basma Abdi
- Sorbonne University, Virology Department, Pitié-Salpêtrière Hospital, AP-HP, Pierre Louis Epidemiology and Public Health Institute (iPLESP), INSERM, Paris, France
| | - Cathia Soulie
- Sorbonne University, Virology Department, Pitié-Salpêtrière Hospital, AP-HP, Pierre Louis Epidemiology and Public Health Institute (iPLESP), INSERM, Paris, France
| | - Lise Cuzin
- CERPOP, Toulouse University, Inserm UMR, UPS, Toulouse, France.,Martinique University Hospital, Infectious Diseases Department, Fort-de-France, France
| | - Roland Tubiana
- Sorbonne University, Infectious Diseases Department, Pitié-Salpêtrière Hospital, AP-HP, Pierre Louis Epidemiology and Public Health Institute (iPLESP), INSERM, Paris, France
| | - Marc-Antoine Valantin
- Sorbonne University, Infectious Diseases Department, Pitié-Salpêtrière Hospital, AP-HP, Pierre Louis Epidemiology and Public Health Institute (iPLESP), INSERM, Paris, France
| | - Luminita Schneider
- Sorbonne University, Infectious Diseases Department, Pitié-Salpêtrière Hospital, AP-HP, Pierre Louis Epidemiology and Public Health Institute (iPLESP), INSERM, Paris, France
| | - Sophie Seang
- Sorbonne University, Infectious Diseases Department, Pitié-Salpêtrière Hospital, AP-HP, Pierre Louis Epidemiology and Public Health Institute (iPLESP), INSERM, Paris, France
| | - Marc Wirden
- Sorbonne University, Virology Department, Pitié-Salpêtrière Hospital, AP-HP, Pierre Louis Epidemiology and Public Health Institute (iPLESP), INSERM, Paris, France
| | - Valérie Pourcher
- Sorbonne University, Infectious Diseases Department, Pitié-Salpêtrière Hospital, AP-HP, Pierre Louis Epidemiology and Public Health Institute (iPLESP), INSERM, Paris, France
| | - Christine Katlama
- Sorbonne University, Infectious Diseases Department, Pitié-Salpêtrière Hospital, AP-HP, Pierre Louis Epidemiology and Public Health Institute (iPLESP), INSERM, Paris, France
| | - Vincent Calvez
- Sorbonne University, Virology Department, Pitié-Salpêtrière Hospital, AP-HP, Pierre Louis Epidemiology and Public Health Institute (iPLESP), INSERM, Paris, France
| | - Anne-Geneviève Marcelin
- Sorbonne University, Virology Department, Pitié-Salpêtrière Hospital, AP-HP, Pierre Louis Epidemiology and Public Health Institute (iPLESP), INSERM, Paris, France
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6
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Lathouwers E, Weinsteiger S, Baugh B, Ghys A, Jezorwski J, Mohsine EG, Van Landuyt E, De Meyer S. Week 96 resistance analyses of the once-daily, single-tablet regimen (STR) darunavir/cobicistat/emtricitabine/tenofovir alafenamide (D/C/F/TAF) in adults living with HIV-1 from the phase 3 randomized AMBER and EMERALD trials. J Med Virol 2021; 93:3985-3990. [PMID: 33300183 DOI: 10.1002/jmv.26721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 10/16/2020] [Accepted: 12/06/2020] [Indexed: 11/07/2022]
Abstract
In AMBER and EMERALD, darunavir/cobicistat/emtricitabine/tenofovir alafenamide (D/C/F/TAF) 800/150/200/10 mg demonstrated high virological response and low virological failure (VF) through week 96. Week 96 resistance analyses are presented. Post-baseline samples for genotyping/phenotyping were analyzed from protocol-defined-VFs with viral load (VL) ≥ 400 copies/ml at failure/later time points. Post-hoc analyses were deep sequencing (AMBER) and HIV-1 proviral DNA sequencing from baseline samples (VL < 50 copies/ml) (EMERALD). Through week 96 across studies, no darunavir, primary protease inhibitor (PI), or tenofovir resistance-associated-mutations (RAMs) occurred in patients continuing (N = 1125) or switching to D/C/F/TAF (N = 715). M184I/V (emtricitabine RAM) was detected in one patient in each arm of AMBER. In EMERALD D/C/F/TAF patients with prior VF and baseline genoarchive data (N = 98), 4% had darunavir RAMs, 36% emtricitabine RAMs, mainly at position 184 (32%), 4% tenofovir RAMs, and 19% ≥3 thymidine-analogue-associated-mutations at screening. The predicted phenotype showed 0% had reduced susceptibility to darunavir, 37% to emtricitabine, and 22% to tenofovir. All achieved VL < 50 copies/ml at week 96/prior discontinuation, with no VF. D/C/F/TAF has a high barrier to resistance; no darunavir, primary PI, or tenofovir RAMs occurred through 96 weeks in AMBER and EMERALD. In EMERALD, baseline archived darunavir, emtricitabine, and tenofovir RAMs in patients with prior VF did not preclude virologic response.
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Affiliation(s)
| | | | - Bryan Baugh
- Janssen Research & Development LLC, Raritan, New Jersey, USA
| | - Anne Ghys
- Janssen Pharmaceutica NV, Beerse, Belgium
| | - John Jezorwski
- Janssen Research & Development, Pennington, New Jersey, USA
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7
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No HIV-1 molecular evolution on long-term antiretroviral therapy initiated during primary HIV-1 infection. AIDS 2020; 34:1745-1753. [PMID: 32694418 DOI: 10.1097/qad.0000000000002629] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
OBJECTIVE Most studies about HIV-1 molecular evolution have shown the lack of viral evolution on effective antiretroviral therapy (ART), although controversial results have been documented. We therefore aimed to look for evidence of HIV-1 evolution in patients who initiated ART at the time of primary HIV-1 infection (PHI). DESIGN We included retrospectively 20 patients diagnosed at PHI, treated at the time of acute infection and with subsequent effective long-term suppressive ART (HIV viral load <20 copies/ml during at least 5 years without any blips). METHODS Longitudinal blood samples were deep sequenced using Illumina Miseq. Drug-resistance-associated mutations were retained at 2% cutoff and interpreted using the latest Agence Nationale de Recherches sur le Sida et les Hépatites Virales resistance algorithm. Viral evolution was established when temporal structure on maximum-likelihood phylogenetic tree and significant change over time of HIV-1 genetic diversity measured as the average pairwise distance was observed. RESULTS Emergences or disappearances of drug-resistance-associated mutations were detected in the blood cells during follow-up despite sustained virological control. In all patients, tree topologies showed an absence of segregation between sequences and blood viral populations from all time-points were intermingled. Comparison of the average pairwise distance showed the absence of significant viral diversity at the time of primary infection and afterwards during 5 years of full virological control under ART. CONCLUSION Despite a slight variation of minority resistance-associated mutation variants, there was no clear evidence of viral evolution during a prolonged period of time in this population of highly controlled adult patients treated at time of PHI.
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8
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Gantner P, Pagliuzza A, Pardons M, Ramgopal M, Routy JP, Fromentin R, Chomont N. Single-cell TCR sequencing reveals phenotypically diverse clonally expanded cells harboring inducible HIV proviruses during ART. Nat Commun 2020; 11:4089. [PMID: 32796830 PMCID: PMC7427996 DOI: 10.1038/s41467-020-17898-8] [Citation(s) in RCA: 66] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2020] [Accepted: 07/23/2020] [Indexed: 12/22/2022] Open
Abstract
Clonal expansions occur in the persistent HIV reservoir as shown by the duplication of proviral integration sites. However, the source of the proliferation of HIV-infected cells remains unclear. Here, we analyze the TCR repertoire of single HIV-infected cells harboring translation-competent proviruses in longitudinal samples from eight individuals on antiretroviral therapy (ART). When compared to uninfected cells, the TCR repertoire of reservoir cells is heavily biased: expanded clonotypes are present in all individuals, account for the majority of reservoir cells and are often maintained over time on ART. Infected T cell clones are detected at low frequencies in the long-lived central memory compartment and overrepresented in the most differentiated memory subsets. Our results indicate that clonal expansions highly contribute to the persistence of the HIV reservoir and suggest that reservoir cells displaying a differentiated phenotype are the progeny of infected central memory cells undergoing antigen-driven clonal expansion during ART. The cause of clonal expansions in the HIV reservoir remains unclear. Here, Gantner et al. perform single-cell TCR sequencing on longitudinal samples from eight individuals on antiretroviral therapy and find that antigens inducing clonal expansions of memory cells are major contributors to the HIV reservoir.
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Affiliation(s)
- Pierre Gantner
- Department of Microbiology, Infectiology and Immunology, Université de Montréal, Montreal, QC, Canada
| | - Amélie Pagliuzza
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal, Montreal, QC, Canada
| | - Marion Pardons
- Department of Microbiology, Infectiology and Immunology, Université de Montréal, Montreal, QC, Canada
| | - Moti Ramgopal
- Midway Immunology & Research Center, Fort Pierce, FL, USA
| | - Jean-Pierre Routy
- Division of Hematology & Chronic Viral Illness Service, McGill University Heath Centre, Montreal, QC, Canada
| | - Rémi Fromentin
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal, Montreal, QC, Canada
| | - Nicolas Chomont
- Department of Microbiology, Infectiology and Immunology, Université de Montréal, Montreal, QC, Canada. .,Centre de Recherche du Centre Hospitalier de l'Université de Montréal, Montreal, QC, Canada.
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9
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Abstract
Although antiretroviral therapies (ARTs) potently inhibit HIV replication, they do not eradicate the virus. HIV persists in cellular and anatomical reservoirs that show minimal decay during ART. A large number of studies conducted during the past 20 years have shown that HIV persists in a small pool of cells harboring integrated and replication-competent viral genomes. The majority of these cells do not produce viral particles and constitute what is referred to as the latent reservoir of HIV infection. Therefore, although HIV is not considered as a typical latent virus, it can establish a state of nonproductive infection under rare circumstances, particularly in memory CD4+ T cells, which represent the main barrier to HIV eradication. While it was originally thought that the pool of latently infected cells was largely composed of cells harboring transcriptionally silent genomes, recent evidence indicates that several blocks contribute to the nonproductive state of these cells. Here, we describe the virological and immunological factors that play a role in the establishment and persistence of the pool of latently infected cells and review the current approaches aimed at eliminating the latent HIV reservoir.
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Affiliation(s)
| | - Pierre Gantner
- Department of Microbiology, Infectiology and Immunology and
| | - Rémi Fromentin
- Centre de Recherche du Centre Hospitalier, Université de Montréal, Montreal, Quebec, Canada
| | - Nicolas Chomont
- Department of Microbiology, Infectiology and Immunology and
- Centre de Recherche du Centre Hospitalier, Université de Montréal, Montreal, Quebec, Canada
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10
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Lathouwers E, Wong EY, Brown K, Baugh B, Ghys A, Jezorwski J, Mohsine EG, Van Landuyt E, Opsomer M, De Meyer S. Week 48 Resistance Analyses of the Once-Daily, Single-Tablet Regimen Darunavir/Cobicistat/Emtricitabine/Tenofovir Alafenamide (D/C/F/TAF) in Adults Living with HIV-1 from the Phase III Randomized AMBER and EMERALD Trials. AIDS Res Hum Retroviruses 2020; 36:48-57. [PMID: 31516033 PMCID: PMC6944133 DOI: 10.1089/aid.2019.0111] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Darunavir/cobicistat/emtricitabine/tenofovir alafenamide (D/C/F/TAF) 800/150/200/10 mg is being investigated in two Phase III trials, AMBER (NCT02431247; treatment-naive adults) and EMERALD (NCT02269917; treatment-experienced, virologically suppressed adults). Week 48 AMBER and EMERALD resistance analyses are presented. Postbaseline samples for genotyping/phenotyping were analyzed from protocol-defined virologic failures (PDVFs) with viral load (VL) ≥400 copies/mL at failure/later time points. Post hoc analyses were deep sequencing in AMBER, and HIV-1 proviral DNA from baseline samples (VL <50 copies/mL) in EMERALD. Through week 48 across both studies, no darunavir, primary PI, or tenofovir resistance-associated mutations (RAMs) were observed in HIV-1 viruses of 1,125 participants receiving D/C/F/TAF or 629 receiving boosted darunavir plus emtricitabine/tenofovir-disoproxil-fumarate. In AMBER, the nucleos(t)ide analog reverse transcriptase inhibitor (N(t)RTI) RAM M184I/V was identified in HIV-1 of one participant during D/C/F/TAF treatment. M184V was detected pretreatment as a minority variant (9%). In EMERALD, in participants with prior VF and genoarchive data (N = 140; 98 D/C/F/TAF and 42 control), 4% had viruses with darunavir RAMs, 38% with emtricitabine RAMs, mainly at position 184 (41% not fully susceptible to emtricitabine), 4% with tenofovir RAMs, and 21% ≥ 3 thymidine analog-associated mutations (24% not fully susceptible to tenofovir) detected at screening. All achieved VL <50 copies/mL at week 48 or prior discontinuation. D/C/F/TAF has a high genetic barrier to resistance; no darunavir, primary PI, or tenofovir RAMs were observed through 48 weeks in AMBER and EMERALD. Only one postbaseline M184I/V RAM was observed in HIV-1 of an AMBER participant. In EMERALD, baseline archived RAMs to darunavir, emtricitabine, and tenofovir in participants with prior VF did not preclude virologic response.
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Affiliation(s)
| | - Eric Y Wong
- Janssen Scientific Affairs, LLC, Titusville, New Jersey
| | | | - Bryan Baugh
- Janssen Research & Development LLC, Raritan, New Jersey
| | - Anne Ghys
- Janssen Pharmaceutica NV, Beerse, Belgium
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11
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Boukli N, Boyd A, Collot M, Meynard JL, Girard PM, Morand-Joubert L. Utility of HIV-1 DNA genotype in determining antiretroviral resistance in patients with low or undetectable HIV RNA viral loads. J Antimicrob Chemother 2019; 73:3129-3136. [PMID: 30137336 DOI: 10.1093/jac/dky316] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Accepted: 07/09/2018] [Indexed: 01/20/2023] Open
Abstract
Objectives To investigate the extent to which drug resistance can be evaluated from proviral HIV-1 DNA genotype compared with RNA genotype at different timepoints. Patients and methods In HIV-1-infected patients routinely seen at a university hospital, who needed to change their current ART, antiretroviral drug resistance was determined from DNA genotype and was compared with past RNA genotype (group 1) or same-day RNA genotype (group 2). A 'resistance sum' was defined as the sum of agents to which resistance was present and was calculated across NRTI, NNRTI and PI. We defined 'loss of information' as when a lower resistance sum was observed in DNA than in RNA samples. Results Of the 74 and 26 patients included in groups 1 and 2, respectively, most had a long median duration of known HIV-1 infection (17.4 and 14.2 years) and ART (15.3 years and 13.5 years). For group 1, the median (range) resistance sums between DNA/RNA were 0 (0-6)/1 (0-6) for NRTIs, 0 (0-4)/0 (0-4) for NNRTIs and 0 (0-7)/0 (0-8) for PIs, which were comparable with group 2. Loss of information in DNA was substantial for group 1 (37.8%) and less so for group 2 (11.1%). In multivariable analysis, only longer ART duration was significantly associated with loss of information. Results were similar in patients harbouring resistance to one or more agents. Conclusions In a real-life setting, genotyping DNA from PBMC has some degree of concordance compared with RNA. Loss of information in DNA would appear to coincide with longer periods of ART.
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Affiliation(s)
- Narjis Boukli
- AP-HP, Centre Hospitalo-Universitaire Saint-Antoine, Laboratoire de Virologie, Paris, France
| | - Anders Boyd
- INSERM, Institut Pierre Louis d'Epidémiologie et de Santé Publique, Paris, France
| | - Marianne Collot
- AP-HP, Centre Hospitalo-Universitaire Saint-Antoine, Laboratoire de Virologie, Paris, France
| | - Jean-Luc Meynard
- AP-HP, Centre Hospitalo-Universitaire Saint-Antoine, Service de Maladies Infectieuses, Paris, France
| | - Pierre-Marie Girard
- AP-HP, Centre Hospitalo-Universitaire Saint-Antoine, Service de Maladies Infectieuses, Paris, France.,Sorbonne Universités, UPMC Université Paris 06, INSERM, Institut Pierre Louis d'épidémiologie et de Santé Publique (IPLESP UMRS 1136), Paris, France
| | - Laurence Morand-Joubert
- AP-HP, Centre Hospitalo-Universitaire Saint-Antoine, Laboratoire de Virologie, Paris, France.,Sorbonne Universités, UPMC Université Paris 06, INSERM, Institut Pierre Louis d'épidémiologie et de Santé Publique (IPLESP UMRS 1136), Paris, France
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12
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Rodriguez C, Nere ML, Demontant V, Charreau I, Mercier-Darty M, Delagreverie H, Salmona M, de Castro N, Chaix ML, Molina JM, Delaugerre C. Ultra-deep sequencing improves the detection of drug resistance in cellular DNA from HIV-infected patients on ART with suppressed viraemia. J Antimicrob Chemother 2019; 73:3122-3128. [PMID: 30137335 DOI: 10.1093/jac/dky315] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Accepted: 07/09/2018] [Indexed: 12/13/2022] Open
Abstract
Background Standard genotypic tests performed on HIV DNA from patients on suppressive ART, with previous resistance-associated mutations (RAMs) detected in their plasma, underestimate resistance. We thus compared ultra-deep sequencing (UDS) with bulk sequencing of DNA to detect RAMs previously identified in plasma. Methods We sequenced the DNA of 169 highly treatment experienced patients with suppressed viraemia (ANRS 138-EASIER trial). Protease (PR) and reverse transcriptase (RT) genes from HIV DNA were sequenced by bulk sequencing and UDS, comparing 1% and 20% as thresholds of detection for UDS. Results Patients were highly treatment experienced (13.6 years). UDS of DNA was successful for the RT and PR genes in 133 (79%) and 137 (81%) patients, respectively. The detection of RAMs was similar by bulk sequencing and UDS with a 20% cut-off. However, the detection of RAMs by UDS with a 1% cut-off was significantly higher than that of bulk sequencing for RT codons D67N (65.4% versus 52.3%), M184V (66.2% versus 52.3%), L210W (48.9% versus 36.4%) and T215Y (57.9% versus 42.1%) and PR codons M46I (46% versus 26%), I54L (12.4% versus 3.9%), V82A (44.5% versus 29.9%) and L90M (57.7% versus 42.5%). Conclusions Genotypic resistance testing of cellular HIV DNA of well-controlled patients should use UDS technology with a sensitivity threshold of 1% to improve the detection of the resistant reservoir.
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Affiliation(s)
- Christophe Rodriguez
- Laboratoire de Virologie, Hôpital Henri Mondor, APHP, Créteil, France
- Université Paris Est Créteil, UPEC, U955 Inserm, Créteil, France
| | - Marie Laure Nere
- Laboratoire de Virologie, Hôpital Saint-Louis, APHP, Paris, France
- Université Paris Diderot, Inserm U941, Paris, France
| | - Vanessa Demontant
- Laboratoire de Virologie, Hôpital Henri Mondor, APHP, Créteil, France
- Université Paris Est Créteil, UPEC, U955 Inserm, Créteil, France
| | | | - Mélanie Mercier-Darty
- Laboratoire de Virologie, Hôpital Henri Mondor, APHP, Créteil, France
- Université Paris Est Créteil, UPEC, U955 Inserm, Créteil, France
| | - Héloïse Delagreverie
- Laboratoire de Virologie, Hôpital Saint-Louis, APHP, Paris, France
- Université Paris Diderot, Inserm U941, Paris, France
| | - Maud Salmona
- Laboratoire de Virologie, Hôpital Saint-Louis, APHP, Paris, France
- Université Paris Diderot, Inserm U941, Paris, France
| | | | - Marie Laure Chaix
- Laboratoire de Virologie, Hôpital Saint-Louis, APHP, Paris, France
- Université Paris Diderot, Inserm U941, Paris, France
| | - Jean Michel Molina
- Université Paris Diderot, Inserm U941, Paris, France
- Maladies infectieuses, Hôpital Saint-Louis, APHP, Paris, France
| | - Constance Delaugerre
- Laboratoire de Virologie, Hôpital Saint-Louis, APHP, Paris, France
- Université Paris Diderot, Inserm U941, Paris, France
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13
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Gantner P, Lee GQ, Rey D, Mesplede T, Partisani M, Cheneau C, Beck-Wirth G, Faller JP, Mohseni-Zadeh M, Martinot M, Wainberg MA, Fafi-Kremer S. Dolutegravir reshapes the genetic diversity of HIV-1 reservoirs. J Antimicrob Chemother 2019; 73:1045-1053. [PMID: 29244129 DOI: 10.1093/jac/dkx475] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Accepted: 11/15/2017] [Indexed: 12/12/2022] Open
Abstract
Objectives Better understanding of the dynamics of HIV reservoirs under ART is a critical step to achieve a functional HIV cure. Our objective was to assess the genetic diversity of archived HIV-1 DNA over 48 weeks in blood cells of individuals starting treatment with a dolutegravir-based regimen. Methods Eighty blood samples were prospectively and longitudinally collected from 20 individuals (NCT02557997) including: acutely (n = 5) and chronically (n = 5) infected treatment-naive individuals, as well as treatment-experienced individuals who switched to a dolutegravir-based regimen and were either virologically suppressed (n = 5) or had experienced treatment failure (n = 5). The integrase and V3 loop regions of HIV-1 DNA isolated from PBMCs were analysed by pyrosequencing at baseline and weeks 4, 24 and 48. HIV-1 genetic diversity was calculated using Shannon entropy. Results All individuals achieved or maintained viral suppression throughout the study. A low and stable genetic diversity of archived HIV quasispecies was observed in individuals starting treatment during acute infection. A dramatic reduction of the genetic diversity was observed at week 4 of treatment in the other individuals. In these patients and despite virological suppression, a recovery of the genetic diversity of the reservoirs was observed up to 48 weeks. Viral variants bearing dolutegravir resistance-associated substitutions at integrase position 50, 124, 230 or 263 were detected in five individuals (n = 5/20, 25%) from all groups except those who were ART-failing at baseline. None of these substitutions led to virological failure. Conclusions These data demonstrate that the genetic diversity of the HIV-1 reservoir is reshaped following the initiation of a dolutegravir-based regimen and strongly suggest that HIV-1 can continue to replicate despite successful treatment.
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Affiliation(s)
- Pierre Gantner
- Virology Laboratory, Strasbourg University Hospitals, Strasbourg, France.,Strasbourg University, INSERM, UMR-S 1109, F-67000 Strasbourg, France
| | - Guinevere Q Lee
- The Ragon Institute of MGH, MIT and Harvard, Cambridge, MA, USA
| | - David Rey
- Le Trait d'Union, HIV-infection care center, CHU de Strasbourg, Strasbourg, France
| | - Thibault Mesplede
- McGill University AIDS Centre, Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, Quebec, Canada.,Department of Microbiology and Immunology, McGill University, Montreal, Quebec, Canada
| | - Marialuisa Partisani
- Le Trait d'Union, HIV-infection care center, CHU de Strasbourg, Strasbourg, France
| | - Christine Cheneau
- Le Trait d'Union, HIV-infection care center, CHU de Strasbourg, Strasbourg, France
| | - Geneviève Beck-Wirth
- Internal Medicine Department, HIV-infection care center, GHR Mulhouse Sud Alsace, Mulhouse, France
| | - Jean-Pierre Faller
- Department of Infectious Diseases, Hôpital Nord Franche Comté, Belfort, France
| | - Mahsa Mohseni-Zadeh
- Internal Medicine and Rheumatology Department, Hôpital Civil de Colmar, Colmar, France
| | - Martin Martinot
- Internal Medicine and Rheumatology Department, Hôpital Civil de Colmar, Colmar, France
| | - Mark A Wainberg
- McGill University AIDS Centre, Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, Quebec, Canada.,Department of Microbiology and Immunology, McGill University, Montreal, Quebec, Canada
| | - Samira Fafi-Kremer
- Virology Laboratory, Strasbourg University Hospitals, Strasbourg, France.,Strasbourg University, INSERM, UMR-S 1109, F-67000 Strasbourg, France
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14
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Charpentier C, Montes B, Perrier M, Meftah N, Reynes J. HIV-1 DNA ultra-deep sequencing analysis at initiation of the dual therapy dolutegravir + lamivudine in the maintenance DOLULAM pilot study. J Antimicrob Chemother 2018; 72:2831-2836. [PMID: 29091218 DOI: 10.1093/jac/dkx233] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Accepted: 06/09/2017] [Indexed: 12/12/2022] Open
Abstract
Background The DOLULAM study assessed the efficacy of dolutegravir + lamivudine dual therapy to maintain virological suppression in heavily treatment-experienced HIV-1-infected adults. No virological failure occurred during the first year of the dual therapy. Objectives A virological substudy was conducted to assess the prevalence of M184I/V mutations at dual therapy initiation using historical DNA/RNA genotypes and baseline DNA genotype obtained by next-generation sequencing (NGS). Methods HIV-1 RT sequences were obtained from DNA and/or historical RNA using Sanger technology. HIV-1 DNA RT and integrase NGS was performed using Illumina® technology. Results Among the 27 patients enrolled in the DOLULAM study, historical HIV DNA and RNA Sanger sequences were available in 14 and 18 patients, respectively. At the initiation of DOLULAM, DNA NGS genotypes showed that 45% and 21% of the patients harboured minority resistant variants (MRV) in RT and integrase, respectively. Combining all available genotype data, an M184I/V was observed in 17 of 27 (63%) of the patients. Most M184V were detected in historical RNA genotypes (n = 8 of 11), whereas M184I were exclusively detected in DNA genotypes (n = 10, including 7 as MRV). Ten patients displayed defective viral genomes in cellular reservoirs, all including M184I and stop codons. At the time of DOLULAM initiation, M184V was observed in DNA NGS in five patients, including one as MRV. Conclusions These first NGS data on HIV DNA at initiation of a switch study showed (i) a high proportion of patients harbouring defective viral genomes, whose mutation M184I is a marker, and (ii) a low number of patients in whom M184V remained as a major viral variant in PBMCs.
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Affiliation(s)
- Charlotte Charpentier
- IAME, UMR 1137, INSERM, Université Paris Diderot, Sorbonne Paris Cité, AP-HP, Laboratoire de Virologie, Hôpital Bichat, AP-HP, Paris, France
| | - Brigitte Montes
- Laboratoire de Virologie, CHU de Montpellier, Montpellier, France
| | - Marine Perrier
- IAME, UMR 1137, INSERM, Université Paris Diderot, Sorbonne Paris Cité, AP-HP, Laboratoire de Virologie, Hôpital Bichat, AP-HP, Paris, France
| | - Nadia Meftah
- COREVIH, CHU de Montpellier, Montpellier, France
| | - Jacques Reynes
- Département de Maladies infectieuses et tropicales, CHU de Montpellier, Montpellier, France.,Unité Mixte Internationale 233 IRD-U1175 INSERM-Université de Montpellier, Montpellier, France
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15
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Total HIV-1 DNA, a Marker of Viral Reservoir Dynamics with Clinical Implications. Clin Microbiol Rev 2017; 29:859-80. [PMID: 27559075 DOI: 10.1128/cmr.00015-16] [Citation(s) in RCA: 152] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
HIV-1 DNA persists in infected cells despite combined antiretroviral therapy (cART), forming viral reservoirs. Recent trials of strategies targeting latent HIV reservoirs have rekindled hopes of curing HIV infection, and reliable markers are thus needed to evaluate viral reservoirs. Total HIV DNA quantification is simple, standardized, sensitive, and reproducible. Total HIV DNA load influences the course of the infection and is therefore clinically relevant. In particular, it is predictive of progression to AIDS and death, independently of HIV RNA load and the CD4 cell count. Baseline total HIV DNA load is predictive of the response to cART. It declines during cART but remains quantifiable, at a level that reflects both the history of infection (HIV RNA zenith, CD4 cell count nadir) and treatment efficacy (residual viremia, cumulative viremia, immune restoration, immune cell activation). Total HIV DNA load in blood is also predictive of the presence and severity of some HIV-1-associated end-organ disorders. It can be useful to guide individual treatment, notably, therapeutic de-escalation. Although it does not distinguish between replication-competent and -defective latent viruses, the total HIV DNA load in blood, tissues, and cells provides insights into HIV pathogenesis, probably because all viral forms participate in host cell activation and HIV pathogenesis. Total HIV DNA is thus a biomarker of HIV reservoirs, which can be defined as all infected cells and tissues containing all forms of HIV persistence that participate in pathogenesis. This participation may occur through the production of new virions, creating new cycles of infection and disseminating infected cells; maintenance or amplification of reservoirs by homeostatic cell proliferation; and viral transcription and synthesis of viral proteins without new virion production. These proteins can induce immune activation, thus participating in the vicious circle of HIV pathogenesis.
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16
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Zaccarelli M, Santoro MM, Armenia D, Borghi V, Gennari W, Gori C, Forbici F, Bertoli A, Fabeni L, Giannetti A, Cicalini S, Bellagamba R, Andreoni M, Mastroianni CM, Mussini C, Ceccherini-Silberstein F, Perno CF, Antinori A. Genotypic resistance test in proviral DNA can identify resistance mutations never detected in historical genotypic test in patients with low level or undetectable HIV-RNA. J Clin Virol 2016; 82:94-100. [PMID: 27472519 DOI: 10.1016/j.jcv.2016.07.007] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Revised: 06/17/2016] [Accepted: 07/15/2016] [Indexed: 11/15/2022]
Abstract
BACKGROUND Beyond the detection of resistant HIV strains found in plasma samples, archival HIV-DNA in peripheral blood mononuclear cells (PBMCs) might represent a reservoir of additional resistance. OBJECTIVE To characterize the HIV-1 resistance in PBMCs from patients with suppressed or low-level viremia (50-1000 copies/mL) and evaluate its added value compared to the resistance detected in previous plasma genotypic resistance tests (GRTs). STUDY DESIGN HIV-1 infected patients selected for treatment change despite low/undetectable viremia were tested. Number and type of primary resistance mutations (PRMs) detected in PBMCs were compared to those detected in previous plasma GRTs. Logistic regression assessed factors associated with presence of at least one PRM in PBMCs. RESULT 468 patients with a PBMC GRT were analyzed; 149 of them had at least 2 plasma GRTs performed before PBMC genotyping. 42.3% of patients showed at least one PRM in PBMCs. The highest proportion of PRMs in PBMCs was observed for NRTI class (30.6%), followed by NNRTI (22.2%), PI (14.1%) and INI (4.9%). In 20.1% of patients, PRMs were detected only in PBMCs and not in any of the plasma GRT previously performed. By using multivariable analysis, a higher number of previous regimens, injecting drug-use route and a lower nadir CD4 were associated with significantly higher risk of detecting PRMs in PBMCs. CONCLUSION Our findings support the usage of PBMC GRT in addition to the current recommended plasma RNA test, especially when therapeutic and/or resistance information is not available.
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Affiliation(s)
- Mauro Zaccarelli
- National Institute for Infectious Diseases L. Spallanzani, IRCCS, Rome, Italy
| | | | | | | | | | - Caterina Gori
- National Institute for Infectious Diseases L. Spallanzani, IRCCS, Rome, Italy
| | - Federica Forbici
- National Institute for Infectious Diseases L. Spallanzani, IRCCS, Rome, Italy
| | | | - Lavinia Fabeni
- National Institute for Infectious Diseases L. Spallanzani, IRCCS, Rome, Italy
| | - Alberto Giannetti
- National Institute for Infectious Diseases L. Spallanzani, IRCCS, Rome, Italy
| | - Stefania Cicalini
- National Institute for Infectious Diseases L. Spallanzani, IRCCS, Rome, Italy
| | - Rita Bellagamba
- National Institute for Infectious Diseases L. Spallanzani, IRCCS, Rome, Italy
| | | | | | | | | | | | - Andrea Antinori
- National Institute for Infectious Diseases L. Spallanzani, IRCCS, Rome, Italy
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