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      A child with perinatal HIV infection and long-term sustained virological control following antiretroviral treatment cessation

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          Abstract

          Understanding HIV remission in rare individuals who initiated antiretroviral therapy (ART) soon after infection and then discontinued, may inform HIV cure interventions. Here we describe features of virus and host of a perinatally HIV-1 infected child with long-term sustained virological control. The child received early limited ART in the Children with HIV Early antiRetroviral therapy (CHER) trial. At age 9.5 years, diagnostic tests for HIV are negative and the child has characteristics similar to uninfected children that include a high CD4:CD8 ratio, low T cell activation and low CCR5 expression. Virus persistence (HIV-1 DNA and plasma RNA) is confirmed with sensitive methods, but replication-competent virus is not detected. The child has weak HIV-specific antibody and T cell responses. Furthermore, we determine his HLA and KIR genotypes. This case aids in understanding post-treatment control and may help design of future intervention strategies.

          Abstract

          Some perinatally HIV infected children who have received early antiretroviral therapy (ART) show long-term sustained virological control after ART cessation. Here the authors describe a case who, at age 9.5 years, shows normal CD4:CD8 T cell ratios and has no detectable levels of replication-competent virus.

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          Identification of a reservoir for HIV-1 in patients on highly active antiretroviral therapy.

          The hypothesis that quiescent CD4+ T lymphocytes carrying proviral DNA provide a reservoir for human immunodeficiency virus-type 1 (HIV-1) in patients on highly active antiretroviral therapy (HAART) was examined. In a study of 22 patients successfully treated with HAART for up to 30 months, replication-competent virus was routinely recovered from resting CD4+ T lymphocytes. The frequency of resting CD4+ T cells harboring latent HIV-1 was low, 0.2 to 16.4 per 10(6) cells, and, in cross-sectional analysis, did not decrease with increasing time on therapy. The recovered viruses generally did not show mutations associated with resistance to the relevant antiretroviral drugs. This reservoir of nonevolving latent virus in resting CD4+ T cells should be considered in deciding whether to terminate treatment in patients who respond to HAART.
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            MEGA4: Molecular Evolutionary Genetics Analysis (MEGA) software version 4.0.

            We announce the release of the fourth version of MEGA software, which expands on the existing facilities for editing DNA sequence data from autosequencers, mining Web-databases, performing automatic and manual sequence alignment, analyzing sequence alignments to estimate evolutionary distances, inferring phylogenetic trees, and testing evolutionary hypotheses. Version 4 includes a unique facility to generate captions, written in figure legend format, in order to provide natural language descriptions of the models and methods used in the analyses. This facility aims to promote a better understanding of the underlying assumptions used in analyses, and of the results generated. Another new feature is the Maximum Composite Likelihood (MCL) method for estimating evolutionary distances between all pairs of sequences simultaneously, with and without incorporating rate variation among sites and substitution pattern heterogeneities among lineages. This MCL method also can be used to estimate transition/transversion bias and nucleotide substitution pattern without knowledge of the phylogenetic tree. This new version is a native 32-bit Windows application with multi-threading and multi-user supports, and it is also available to run in a Linux desktop environment (via the Wine compatibility layer) and on Intel-based Macintosh computers under the Parallels program. The current version of MEGA is available free of charge at (http://www.megasoftware.net).
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              Absence of detectable HIV-1 viremia after treatment cessation in an infant.

              An infant born to a woman with human immunodeficiency virus type 1 (HIV-1) infection began receiving antiretroviral therapy (ART) 30 hours after birth owing to high-risk exposure. ART was continued when detection of HIV-1 DNA and RNA on repeat testing met the standard diagnostic criteria for infection. After therapy was discontinued (when the child was 18 months of age), levels of plasma HIV-1 RNA, proviral DNA in peripheral-blood mononuclear cells, and HIV-1 antibodies, as assessed by means of clinical assays, remained undetectable in the child through 30 months of age. This case suggests that very early ART in infants may alter the establishment and long-term persistence of HIV-1 infection.
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                Author and article information

                Contributors
                violari@mweb.co.za
                carolinet@nicd.ac.za
                Journal
                Nat Commun
                Nat Commun
                Nature Communications
                Nature Publishing Group UK (London )
                2041-1723
                24 January 2019
                24 January 2019
                2019
                : 10
                : 412
                Affiliations
                [1 ]ISNI 0000 0004 1937 1135, GRID grid.11951.3d, Perinatal HIV Research Unit, Faculty of Health Sciences, , University of the Witwatersrand, ; PO Box 114, Diepkloof, Soweto, 1864 South Africa
                [2 ]ISNI 0000 0001 2214 904X, GRID grid.11956.3a, Family Clinical Research Unit, Department of Paediatrics and Child Health, , Stellenbosch University, ; PO Box 241, Cape Town, 8000 South Africa
                [3 ]ISNI 0000 0001 2285 2675, GRID grid.239585.0, Gertrude H. Sergievsky Center, College of Physicians and Surgeons; and Department of Epidemiology, Mailman School of Public Health, , Columbia University Medical Center, ; 630 W 168th Street, New York, NY 10032 USA
                [4 ]ISNI 0000 0004 0630 4574, GRID grid.416657.7, Centre for HIV and STIs, , National Institute for Communicable Diseases (NICD), of the National Health Laboratory Service (NHLS), ; Johannesburg, 2131 South Africa
                [5 ]ISNI 0000 0004 1937 1135, GRID grid.11951.3d, Faculty of Health Sciences, , University of the Witwatersrand, ; Parktown, Johannesburg, 2193 South Africa
                [6 ]GRID grid.452200.1, Anova Health Institute, ; 12 Sherborne Road, Parktown, Johannesburg, 2193 South Africa
                [7 ]ISNI 0000 0004 1937 1151, GRID grid.7836.a, School of Public Health and Family Medicine, , Faculty of Health Sciences, University of Cape Town, ; Anzio Road, Observatory, 7925 South Africa
                [8 ]ISNI 0000000121901201, GRID grid.83440.3b, Medical Research Council, Clinical Trials Unit, , University College London, ; 90 High Holborn, London, WC1V 6LJ UK
                Article
                8311
                10.1038/s41467-019-08311-0
                6345921
                30679439
                67fd0fa8-b85c-45d6-b82c-35615d238274
                © The Author(s) 2019

                Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

                History
                : 16 May 2018
                : 3 January 2019
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