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Shalekoff S, Dias BDC, Loubser S, Strehlau R, Kuhn L, Tiemessen CT. Higher CCR5 density on CD4 + T-cells in mothers and infants is associated with increased risk of in-utero HIV-1 transmission. AIDS 2024; 38:945-954. [PMID: 38329228 PMCID: PMC11064911 DOI: 10.1097/qad.0000000000003857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 01/17/2024] [Accepted: 01/24/2024] [Indexed: 02/09/2024]
Abstract
OBJECTIVE CCR5-tropic viruses are preferentially transmitted during perinatal HIV-1 infection. CCR5 density on CD4 + T-cells likely impacts susceptibility to HIV-1 infection. DESIGN Fifty-two mother-infant dyads were enrolled. All mothers were living with HIV-1, 27 of the infants acquired HIV-1 in utero and 25 infants remained uninfected. METHODS CCR5 density, together with frequencies of CD4 + and CD8 + T-cells expressing immune activation (CCR5, ICOS and HLA-DR) and immune checkpoint (TIGIT and PD-1) markers, were measured in whole blood from the dyads close to delivery. RESULTS Compared with mothers who did not transmit, mothers who transmitted HIV-1 had less exposure to ART during pregnancy ( P = 0.015) and higher plasma viral load close to delivery ( P = 0.0005). These mothers, additionally, had higher CCR5 density on CD4 + and CD8 + T-cells and higher frequencies of CCR5, ICOS and TIGIT-expressing CD8 + T-cells. Similarly, compared with infants without HIV-1, infants with HIV-1 had higher CCR5 density on CD4 + and CD8 + T-cells and higher frequencies of CCR5, TIGIT, and PD-1-expressing CD4 + and CD8 + T-cells as well as higher frequencies of HLA-DR-expressing CD8 + T-cells. CCR5 density on maternal CD4 + T-cells remained significantly associated with transmission after adjusting for maternal viral load and CD4 + T cell counts. Mother-infant dyads with shared high CCR5 density phenotypes had the highest risk of transmission/acquisition of infection compared with dyads with shared low-CCR5 density phenotypes. CONCLUSION This study provides strong evidence of a protective role for a combined mother-infant low CD4 + T-cell CCR5 density phenotype in in-utero transmission/acquisition of HIV-1.
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Affiliation(s)
- Sharon Shalekoff
- Centre for HIV and STIs, National Institute for Communicable Diseases, a division of the National Health Laboratory Service, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Bianca Da Costa Dias
- Centre for HIV and STIs, National Institute for Communicable Diseases, a division of the National Health Laboratory Service, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Shayne Loubser
- Centre for HIV and STIs, National Institute for Communicable Diseases, a division of the National Health Laboratory Service, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Renate Strehlau
- VIDA Nkanyezi Research Unit, Rahima Moosa Mother and Child Hospital, Department of Paediatrics and Child Health, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Louise Kuhn
- Gertrude H. Sergievsky Center, Vagelos College of Physicians and Surgeons, Columbia University Irving Medical Center, New York, NY, USA
| | - Caroline T. Tiemessen
- Centre for HIV and STIs, National Institute for Communicable Diseases, a division of the National Health Laboratory Service, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
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2
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Elliott Williams M, Hardnett FP, Sheth AN, Wein AN, Li ZRT, Radzio-Basu J, Dinh C, Haddad LB, Collins EMB, Ofotokun I, Antia R, Scharer CD, Garcia-Lerma JG, Kohlmeier JE, Swaims-Kohlmeier A. The menstrual cycle regulates migratory CD4 T-cell surveillance in the female reproductive tract via CCR5 signaling. Mucosal Immunol 2024; 17:41-53. [PMID: 37866719 PMCID: PMC10990418 DOI: 10.1016/j.mucimm.2023.10.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 10/16/2023] [Accepted: 10/16/2023] [Indexed: 10/24/2023]
Abstract
Despite their importance for immunity against sexually transmitted infections, the composition of female reproductive tract (FRT) memory T-cell populations in response to changes within the local tissue environment under the regulation of the menstrual cycle remains poorly defined. Here, we show that in humans and pig-tailed macaques, the cycle determines distinct clusters of differentiation 4 T-cell surveillance behaviors by subsets corresponding to migratory memory (TMM) and resident memory T cells. TMM displays tissue-itinerant trafficking characteristics, restricted distribution within the FRT microenvironment, and distinct effector responses to infection. Gene pathway analysis by RNA sequencing identified TMM-specific enrichment of genes involved in hormonal regulation and inflammatory responses. FRT T-cell subset fluctuations were discovered that synchronized to cycle-driven CCR5 signaling. Notably, oral administration of a CCR5 antagonist drug blocked TMM trafficking. Taken together, this study provides novel insights into the dynamic nature of FRT memory CD4 T cells and identifies the menstrual cycle as a key regulator of immune surveillance at the site of STI pathogen exposure.
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Affiliation(s)
- M Elliott Williams
- Department of Microbiology & Immunology, Emory University School of Medicine, Atlanta, GA, USA
| | - Felica P Hardnett
- Division of HIV Prevention, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Anandi N Sheth
- Department of Medicine, Division of Infectious Diseases, Emory University School of Medicine and Grady Health System, Atlanta, GA, USA
| | - Alexander N Wein
- Department of Microbiology & Immunology, Emory University School of Medicine, Atlanta, GA, USA
| | - Zheng-Rong Tiger Li
- Department of Microbiology & Immunology, Emory University School of Medicine, Atlanta, GA, USA
| | - Jessica Radzio-Basu
- Division of HIV Prevention, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Chuong Dinh
- Division of HIV Prevention, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Lisa B Haddad
- Department of Gynecology & Obstetrics, Emory University School of Medicine, Atlanta, GA, USA
| | - Elizabeth M B Collins
- Department of Gynecology & Obstetrics, Emory University School of Medicine, Atlanta, GA, USA
| | - Igho Ofotokun
- Department of Medicine, Division of Infectious Diseases, Emory University School of Medicine and Grady Health System, Atlanta, GA, USA
| | - Rustom Antia
- Department of Biology, Emory University, Atlanta, GA, USA
| | - Christopher D Scharer
- Department of Microbiology & Immunology, Emory University School of Medicine, Atlanta, GA, USA
| | - J Gerardo Garcia-Lerma
- Division of HIV Prevention, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Jacob E Kohlmeier
- Department of Microbiology & Immunology, Emory University School of Medicine, Atlanta, GA, USA
| | - Alison Swaims-Kohlmeier
- Department of Microbiology & Immunology, Emory University School of Medicine, Atlanta, GA, USA; Division of HIV Prevention, Centers for Disease Control and Prevention, Atlanta, GA, USA; Department of Gynecology & Obstetrics, Emory University School of Medicine, Atlanta, GA, USA.
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3
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Swaims-Kohlmeier A, Sheth AN, Brody J, Hardnett FP, Sharma S, Bonning EW, Ofotokun I, Massud I, García-Lerma JG. Proinflammatory oscillations over the menstrual cycle drives bystander CD4 T cell recruitment and SHIV susceptibility from vaginal challenge. EBioMedicine 2021; 69:103472. [PMID: 34229275 PMCID: PMC8264117 DOI: 10.1016/j.ebiom.2021.103472] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 05/02/2021] [Accepted: 06/15/2021] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND The menstrual cycle influences HIV infection-risk in women, although the timing and underlying mechanism are unclear. Here we investigated the contribution of the menstrual cycle to HIV susceptibility through evaluating immune behavior with infection-risk over time. METHODS Blood and vaginal lavage samples were collected from 18 pig-tailed macaques to evaluate immune changes over reproductive cycles, and from 5 additional animals undergoing repeated vaginal exposures to simian HIV (SHIV). Peripheral blood mononuclear cell (PBMC) samples from healthy women (n = 10) were prospectively collected over the course of a menstrual cycle to profile T cell populations. Immune properties from PBMC and vaginal lavage samples were measured by flow cytometry. Plasma progesterone was measured by enzyme immunoassay. The oscillation frequency of progesterone concentration and CCR5 expression on CD4 T cells was calculated using the Lomb-Scargle periodogram. SHIV infection was monitored in plasma by RT-PCR. Immune measures were compared using generalized estimating equations (GEE). FINDINGS Macaques cycle-phases were associated with fluctuations in systemic immune properties and a type-1 inflammatory T cell response with corresponding CCR5+ memory CD4 T cell (HIV target cell) infiltration into the vaginal lumen at the late luteal phase. Power spectral analysis identified CCR5 oscillation frequencies synchronized with reproductive cycles. In a repetitive low-dose vaginal challenge model, productive SHIV163P3 infection only occurred during intervals of mounting type-1 T cell responses (n = 5/5). Finally, we identify similar type-1 inflammatory T cell responses over the menstrual cycle are occurring in healthy women. INTERPRETATION These data demonstrate that periodic shifts in the immune landscape under menstrual cycle regulation drives bystander CCR5+ CD4 T cell recruitment and HIV susceptibility in the female reproductive tract. FUNDING This study was supported by the U.S. Centers for Disease Control and Prevention, Atlanta, GA 30329 and NIH grants to Emory University (K23AI114407 to A.N.S., the Emory University Center for AIDS research [P30AI050409], and Atlanta Clinical and Translational Sciences Institute [KLR2TR000455, UL1TR000454]). DISCLAIMER The findings and conclusions in this report are those of the authors and do not necessarily represent the views of the U.S. Centers for Disease Control and Prevention or the Department of Health and Human Services.
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Affiliation(s)
- Alison Swaims-Kohlmeier
- Division of HIV/AIDS Prevention, National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention, Centers for Disease Control and Prevention, Atlanta, GA 30329, United States..
| | - Anandi N Sheth
- Division of Infectious Diseases, Department of Medicine, Emory University, Atlanta, GA 30322, United States
| | - Jed Brody
- Department of Physics, Emory University, Atlanta, GA 30322, United States
| | - Felicia P Hardnett
- Division of HIV/AIDS Prevention, National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention, Centers for Disease Control and Prevention, Atlanta, GA 30329, United States
| | - Sunita Sharma
- Division of HIV/AIDS Prevention, National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention, Centers for Disease Control and Prevention, Atlanta, GA 30329, United States
| | - Erin Wells Bonning
- Department of Physics, Emory University, Atlanta, GA 30322, United States
| | - Igho Ofotokun
- Division of Infectious Diseases, Department of Medicine, Emory University, Atlanta, GA 30322, United States
| | - Ivana Massud
- Division of HIV/AIDS Prevention, National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention, Centers for Disease Control and Prevention, Atlanta, GA 30329, United States
| | - J Gerardo García-Lerma
- Division of HIV/AIDS Prevention, National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention, Centers for Disease Control and Prevention, Atlanta, GA 30329, United States
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4
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Abstract
C-C chemokine receptor (CCR) 5 (CCR5) is the main HIV-1 coreceptor involved in virus entry and cell-to-cell spread during acute and chronic infections: such CCR5 and T cell tropic viruses are adapted to and replicate in CD4+ memory T cells. Polymorphisms in CCR5 regulate CCR5 expression, which, in turn, influences HIV infection acquisition and subsequent disease progression. Among these polymorphisms, a 32-bp deletion in the CCR5 open reading frame (CCR5 Δ32) and a single nucleotide polymorphism (SNP) in the promoter (-2459G/A) are the most well-characterized polymorphisms. CCR5 Δ32 provides partial to full protection against HIV infection and, therefore, serves as a basis for gene deletion studies attempting to achieve a permanent HIV cure. Recent studies have discovered that certain SNPs in the CCR region, not within CCR5, also affect CCR5 expression, HIV infection, and disease progression. Although these studies provide further valuable information regarding the role of human genetic variation in HIV/AIDS, they did not incorporate -2459G/A. In this article, the author summarizes the knowledge gained through the discovery of these new SNPs and introduces the idea that by not incorporating -2459G/A, less comprehensive conclusions may have been reached. Until a strategy that delivers a cure to the millions is found, every piece of information that may help curtail the HIV/AIDS threat to public health should be considered useful.
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Affiliation(s)
- Rajeev K. Mehlotra
- Center for Global Health and Diseases, Case Western Reserve University School of Medicine, Cleveland, Ohio, USA
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5
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Jiang J, Hu X, Li W, Liu J, Liang B, Chen H, Huang J, Zang N, Ning C, Liao Y, Chen R, Lai J, Chu J, Pan P, Cui P, Tang Q, Chen X, Liang H, Ye L. Enhanced Signaling Through the TLR9 Pathway Is Associated With Resistance to HIV-1 Infection in Chinese HIV-1-Exposed Seronegative Individuals. Front Immunol 2020; 11:1050. [PMID: 32547554 PMCID: PMC7274031 DOI: 10.3389/fimmu.2020.01050] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 12/17/2019] [Accepted: 04/30/2020] [Indexed: 12/18/2022] Open
Abstract
Innate immunity is the first line of defense against invading pathogens and may mediate HIV-1 resistance in HIV-1–exposed seronegative (HESN) individuals. This study aims to identify components of innate immunity that confer natural HIV-1 resistance in Chinese HESN individuals. Specifically, we compared the expression levels of Toll-like receptors (TLRs) and associated pathway molecules in peripheral blood mononuclear cells (PBMCs), monocytes/macrophages, and plasma obtained from HESN and control individuals. HESN individuals had higher expression of TLR9, IRF7, IFN-α/β, RANTES, and MIP-1α/1β in PBMCs and plasma than control subjects. Upon TLR9 stimulation, significantly higher expression of TLR9 and IRF7, as well as higher production of IFN-α/β, RANTES, and MIP-1α/1β, was observed in PBMCs and monocytes/macrophages from HESN individuals than in the corresponding cells from control individuals. More importantly, both with and without TLR9 stimulation, the levels of HIV-1 replication in monocyte-derived macrophages (MDMs) from HESN individuals were significantly lower than those in MDMs from control individuals. These data suggest that increased TLR9 activity and subsequent release of antiviral factors contribute to protection against HIV-1 in HESN individuals.
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Affiliation(s)
- Junjun Jiang
- Guangxi Key Laboratory of AIDS Prevention and Treatment, School of Public Health, Guangxi Medical University, Nanning, China.,Guangxi Collaborative Innovation Center for Biomedicine, Life Sciences Institute, Guangxi Medical University, Nanning, China
| | - Xi Hu
- Guangxi Key Laboratory of AIDS Prevention and Treatment, School of Public Health, Guangxi Medical University, Nanning, China
| | - Wenwei Li
- Guangxi Collaborative Innovation Center for Biomedicine, Life Sciences Institute, Guangxi Medical University, Nanning, China
| | - Jie Liu
- Guangxi Key Laboratory of AIDS Prevention and Treatment, School of Public Health, Guangxi Medical University, Nanning, China.,Guangxi Collaborative Innovation Center for Biomedicine, Life Sciences Institute, Guangxi Medical University, Nanning, China
| | - Bingyu Liang
- Guangxi Key Laboratory of AIDS Prevention and Treatment, School of Public Health, Guangxi Medical University, Nanning, China.,Guangxi Collaborative Innovation Center for Biomedicine, Life Sciences Institute, Guangxi Medical University, Nanning, China
| | - Hui Chen
- Guangxi Key Laboratory of AIDS Prevention and Treatment, School of Public Health, Guangxi Medical University, Nanning, China.,Guangxi Collaborative Innovation Center for Biomedicine, Life Sciences Institute, Guangxi Medical University, Nanning, China
| | - Jiegang Huang
- Guangxi Key Laboratory of AIDS Prevention and Treatment, School of Public Health, Guangxi Medical University, Nanning, China.,Guangxi Collaborative Innovation Center for Biomedicine, Life Sciences Institute, Guangxi Medical University, Nanning, China
| | - Ning Zang
- Guangxi Collaborative Innovation Center for Biomedicine, Life Sciences Institute, Guangxi Medical University, Nanning, China
| | - Chuanyi Ning
- Guangxi Key Laboratory of AIDS Prevention and Treatment, School of Public Health, Guangxi Medical University, Nanning, China.,Guangxi Collaborative Innovation Center for Biomedicine, Life Sciences Institute, Guangxi Medical University, Nanning, China
| | - Yanyan Liao
- Guangxi Key Laboratory of AIDS Prevention and Treatment, School of Public Health, Guangxi Medical University, Nanning, China.,Guangxi Collaborative Innovation Center for Biomedicine, Life Sciences Institute, Guangxi Medical University, Nanning, China
| | - Rongfeng Chen
- Guangxi Key Laboratory of AIDS Prevention and Treatment, School of Public Health, Guangxi Medical University, Nanning, China.,Guangxi Collaborative Innovation Center for Biomedicine, Life Sciences Institute, Guangxi Medical University, Nanning, China
| | - Jingzhen Lai
- Guangxi Collaborative Innovation Center for Biomedicine, Life Sciences Institute, Guangxi Medical University, Nanning, China
| | - Jiemei Chu
- Guangxi Collaborative Innovation Center for Biomedicine, Life Sciences Institute, Guangxi Medical University, Nanning, China
| | - Peijiang Pan
- Guangxi Key Laboratory of AIDS Prevention and Treatment, School of Public Health, Guangxi Medical University, Nanning, China.,Guangxi Collaborative Innovation Center for Biomedicine, Life Sciences Institute, Guangxi Medical University, Nanning, China
| | - Ping Cui
- Guangxi Collaborative Innovation Center for Biomedicine, Life Sciences Institute, Guangxi Medical University, Nanning, China
| | - Qiao Tang
- Guangxi Key Laboratory of AIDS Prevention and Treatment, School of Public Health, Guangxi Medical University, Nanning, China.,Guangxi Collaborative Innovation Center for Biomedicine, Life Sciences Institute, Guangxi Medical University, Nanning, China
| | - Xiu Chen
- Guangxi Key Laboratory of AIDS Prevention and Treatment, School of Public Health, Guangxi Medical University, Nanning, China.,Guangxi Collaborative Innovation Center for Biomedicine, Life Sciences Institute, Guangxi Medical University, Nanning, China
| | - Hao Liang
- Guangxi Key Laboratory of AIDS Prevention and Treatment, School of Public Health, Guangxi Medical University, Nanning, China.,Guangxi Collaborative Innovation Center for Biomedicine, Life Sciences Institute, Guangxi Medical University, Nanning, China
| | - Li Ye
- Guangxi Key Laboratory of AIDS Prevention and Treatment, School of Public Health, Guangxi Medical University, Nanning, China.,Guangxi Collaborative Innovation Center for Biomedicine, Life Sciences Institute, Guangxi Medical University, Nanning, China
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Rautenbach A, Williams AA. Metabolomics as an Approach to Characterise the Contrasting Roles of CCR5 in the Presence and Absence of Disease. Int J Mol Sci 2020; 21:E1472. [PMID: 32098198 DOI: 10.3390/ijms21041472] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2019] [Revised: 02/10/2020] [Accepted: 02/11/2020] [Indexed: 02/06/2023] Open
Abstract
Chemokine receptors such as C-C chemokine receptor 5 (CCR5) are activated through interaction with their ligands and are well known for their role in chemotaxis and signal transduction. While serving these roles, cellular responses are effected, hence the immune function of these molecules is established. Given the role of CCR5 in immune function and that the immune and metabolic systems are interlinked, subsequent immune-directed changes should be measurable at a metabolic level. Numerous investigations have reported on metabolic changes associated with CCR5 status in the presence of disease, so as to understand whether specific CCR5 genotypes, frequency and/or levels offer protection to the host or not. However, these metabolic changes were recorded using older conventional techniques. Depending on certain factors such as the disease model, the geography of the samples and/or the ethnic group under study, the role of CCR5 in disease differs. In addition, little is known about CCR5’s role in the absence of an enhanced inflammatory state, such as when infection persists. Metabolomics is defined as the study of metabolites and informs on metabolic changes within living organisms as induced by various stimuli, such as the interaction of CCR5 with its ligand. Since metabolomics reflects the underlying biochemical activity and state of cells/tissues, this review proposes it as a tool to clarify the contrasting roles of CCR5.
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Colón K, Speicher DW, Smith P, Taylor M, Metzger DS, Montaner LJ, Tomescu C. S100A14 Is Increased in Activated NK Cells and Plasma of HIV-Exposed Seronegative People Who Inject Drugs and Promotes Monocyte-NK Crosstalk. J Acquir Immune Defic Syndr 2019; 80:234-41. [PMID: 30422902 DOI: 10.1097/QAI.0000000000001911] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND HIV-exposed seronegative people who inject drugs (HESN-PWID) have been shown to have increased natural killer (NK) cell and myeloid activation when compared with control donors. METHODS We investigated potential mechanisms maintaining NK activation by conducting quantitative proteome comparisons of NK cells from HESN-PWID subjects and control donors. Proteins upregulated in NK cells were measured in the plasma of HESN-PWID subjects by ELISA and further investigated for their ability to induce innate immune activation in vitro. RESULTS The NK cell proteome comparison showed markedly higher levels of interferon-stimulated proteins and S100 proteins, including S100A14. Consistent with these results, we observed significantly higher levels of S100A14 in the plasma of HESN-PWID subjects compared with controls (P = 0.033, n = 25). In vitro, the addition of recombinant S100A14 protein significantly activated NK cells in a peripheral blood mononuclear cell mixture (P = 0.011, n = 9), but not purified NK cells alone. Treatment of purified monocytes with recombinant S100A14 protein induced secretion of TNF-alpha and led to significantly higher NK CD69 activation (P = 0.0156, n = 7) in a co-culture through a TLR4-dependent interaction. CONCLUSIONS Our study identified S100A14 as a novel protein increased within NK cells and plasma of HESN-PWID subjects with the capacity to sustain NK activation through TLR4-dependent activation of myeloid cells.
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Abstract
PURPOSE OF REVIEW Human genetic polymorphisms known to influence HIV acquisition and disease progression occur in Papua New Guinea (PNG). However, no genetic association study has been reported so far. In this article, we review research findings, with a view to stimulate genotype-to-phenotype research. RECENT FINDINGS PNG, a country in Oceania, has a high prevalence of HIV and many sexually transmitted infections. While limited data is available from this country regarding the distribution of human genetic polymorphisms known to influence clinical outcomes of HIV/AIDS, genetic association studies are lacking. Our studies, in the past decade, have revealed that polymorphisms in chemokine receptor-ligand (CCR2-CCR5, CXCL12), innate immune (Toll-like receptor, β-defensin), and antiretroviral drug-metabolism enzyme (CYP2B6, UGT2B7) genes are prevalent in PNG. Although our results need to be validated in further studies, it is urgent to pursue large-scale, comprehensive genetic association studies that include these as well as additional genetic polymorphisms.
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Affiliation(s)
- Rajeev K Mehlotra
- Center for Global Health and Diseases, Case Western Reserve University School of Medicine, Biomedical Research Building, #409A, 2109 Adelbert Rd., Cleveland, OH, 44106, USA.
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9
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Abstract
C-C chemokine receptor 5 (CCR5) polymorphisms, particularly a 32-base pair deletion (∆32) in the open reading frame and −2459G > A in the promoter, are well known for their associations with HIV-1 infection and/or disease progression in a variety of studies. In this era of an HIV cure, where all the emphasis is on ∆32, it seems that −2459G > A has been forgotten or ignored. There is significant importance in the incorporation of the CCR5 −2459G > A genotype information into studies evaluating new immunologic and chemotherapeutic strategies, and those designing and implementing better treatment strategies with current antiretroviral therapy, doing so would enable a better understanding of the response to the intervention, due to a mechanistic or constitutive explanation. Until we find a strategy, whether a stem-cell transplantation or CCR5 editing approach or something else, that delivers a cure to the millions, we should make use of every piece of information that may help curtail HIV/AIDS as a threat to public health.
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10
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Dabee S, Barnabas SL, Lennard KS, Jaumdally SZ, Gamieldien H, Balle C, Happel AU, Murugan BD, Williamson AL, Mkhize N, Dietrich J, Lewis DA, Chiodi F, Hope TJ, Shattock R, Gray G, Bekker LG, Jaspan HB, Passmore JS. Defining characteristics of genital health in South African adolescent girls and young women at high risk for HIV infection. PLoS One 2019; 14:e0213975. [PMID: 30947260 DOI: 10.1371/journal.pone.0213975] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2018] [Accepted: 03/05/2019] [Indexed: 01/24/2023] Open
Abstract
The genital tract of African women has been shown to differ from what is currently accepted as ‘normal’, defined by a pH≤4.5 and lactobacilli-dominated microbiota. Adolescent girls and young women (AGYW) from sub-Saharan Africa are at high risk for HIV, and we hypothesized that specific biological factors are likely to be influential. This study aimed to compare characteristics of vaginal health in HIV-negative AGYW (16-22-years-old), from two South African communities, to international norms. We measured plasma hormones, vaginal pH, presence of BV (Nugent scoring), sexually transmitted infections (multiplex PCR for Chlamydia trachomatis, Neisseria gonorrhoea, Trichomonas vaginalis, Mycoplasma genitalium) and candidiasis (Gram stain) in AGYW (n = 298) from Cape Town and Soweto. Cervicovaginal microbiota was determined by 16S pyrosequencing; 44 genital cytokines were measured by Luminex; and cervical T-cell activation/proliferation (CCR5, HLA-DR, CD38, Ki67) was measured by multiparametric flow cytometry. 90/298 (30.2%) AGYW were negative for BV, candidiasis and bacterial STIs. L. crispatus and L. iners were the dominant bacteria in cervicovaginal swabs, and the median vaginal pH was 4.7. AGYW with L. crispatus-dominant microbiota (42.4%) generally had the lowest cytokine concentrations compared to women with more diverse microbiota (34/44 significantly upregulated cytokines). Frequencies of CCR5+CD4+ T-cells co-expressing CD38 and HLA-DR correlated positively with interleukin (IL)-6, TNF-α, GRO-α, macrophage inflammatory protein (MIP)-1α, and IL-9. While endogenous oestrogen had an immune-dampening effect on IL-6, TNF-related apoptosis-inducing ligand (TRAIL) and IL-16, injectable hormone contraceptives (DMPA and Net-EN) were associated with significantly lower endogenous hormone concentrations (p<0.0001 for oestrogen and progesterone) and upregulation of 34/44 cytokines. Since genital inflammation and the presence of activated CD4+ T cells in the genital tract have been implicated in increased HIV risk in South African women, the observed high levels of genital cellular activation and cytokines from AGYW may point towards biological factors increasing HIV risk in this region.
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Zhang M, Fu Z, Chen J, Zhu B, Cheng Y, Fu L. Low level expression of the Mitochondrial Antiviral Signaling protein (MAVS) associated with long-term nonprogression in SIV-infected rhesus macaques. Virol J 2018; 15:159. [PMID: 30326919 PMCID: PMC6192151 DOI: 10.1186/s12985-018-1069-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [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: 03/07/2018] [Accepted: 09/26/2018] [Indexed: 01/23/2023] Open
Abstract
BACKGROUND Abnormally increased immune activation is one of the main pathological features of acquired immunodeficiency syndrome (AIDS). This study aimed to determine whether long-term nonprogression (LTNP) suppresses the upregulation of immune activation and to elucidate the mechanisms whereby the LTNP state is maintained. METHODS For this study we selected 4 rhesus macaques(RMs) infected with simian immunodeficiency virus (SIV) that were long-term nonprogressors (LTNP); for comparison we chose 4 healthy RMs that were seronegative for SIV (hereafter referred to as the Control group), and 4 progressing infection (Progressive group) SIV RMs. We observed these animals for 6 months without intervention and explored the immunological and pathological differences among the 3 groups. A series of immune activation and inflammation markers-such as C- C chemokine receptor type 5 (CCR5), beta 2- microglobulin (β2-MG), Human Leukocyte Antigen - antigen D Related (HLA-DR), CD38, the levels of microbial translocation (LPS -binding protein), and MAVS-and histological features were monitored during this period. RESULTS Both SIV RNA and SIV DNA in the plasma and lymph nodes (LNs) of the LTNP group were at significantly lower levels than those of the Progressive group (P < 0.05). The CD4/CD8 ratio and CD4 cell count and proportion in the LTNP group were between those of the Progressive and Control groups (P < 0.05): that is, they were higher than in the Progressive group and lower than in the Control group. The LTNP macaques manifested slow progression and decreased immune activation and inflammation; they also had lower levels of CCR5, LPS-binding protein, and β2-MG than the Progressive RMs (P < 0.05). Activation of LTNP in both CD4+ and CD8+ T cells was significantly lower than in the Progressive group and closer to that in the Control group. The histological features of the LTNP macaques were also closer to those of the Control group, even though they had been infected with SIV 4 years earlier. These data point to low viral replication in the LTNP macaques but it is not static. The expression of MAVS in peripheral blood and LNs was lower in the LTNP group than that in the Progressive group (P < 0.01), and MAVS was positively correlated with SIV DNA in LNs (P < 0.05). This may reflect the low activation of T lymphocytes. It was speculated that MAVS may be the link between innate and acquired antiviral immunity in SIV infection. CONCLUSIONS The LTNP RMs in our study were in a relatively stable state of low activation and inflammation, some biological progression with no disease events. This may have been associated with their low levels of the mitochondrial antiviral signaling protein (MAVS).
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Affiliation(s)
- Miaomiao Zhang
- College of Traditional Chinese medicine, Hebei University, Baoding, 071000, China. .,Tropical Medicine Institute, Guangzhou University of Chinese medicine, Guangzhou, 510405, China.
| | - Zhuotao Fu
- The first Affiliated Hospital, Guangzhou University of Chinese medicine, Guangzhou, China
| | - Jiantao Chen
- Tropical Medicine Institute, Guangzhou University of Chinese medicine, Guangzhou, 510405, China
| | - Boqiang Zhu
- Tropical Medicine Institute, Guangzhou University of Chinese medicine, Guangzhou, 510405, China
| | - Ye Cheng
- Tropical Medicine Institute, Guangzhou University of Chinese medicine, Guangzhou, 510405, China
| | - Linchun Fu
- Tropical Medicine Institute, Guangzhou University of Chinese medicine, Guangzhou, 510405, China.
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Abstract
Osteoimmunology is the interdiscipline that focuses on the relationship between the skeletal and immune systems. They are interconnected by shared signal pathways and cytokines. Interferon-gamma (IFN-γ) plays important roles in immune responses and bone metabolism. IFN-γ enhances macrophage activation and antigen presentation. It regulates antiviral and antibacterial immunity as well as signal transduction. IFN-γ can promote osteoblast differentiation and inhibit bone marrow adipocyte formation. IFN-γ plays dual role in osteoclasts depending on its stage. Furthermore, IFN-γ is an important pathogenetic factor in some immune-mediated bone diseases including rheumatoid arthritis, postmenopausal osteoporosis, and acquired immunodeficiency syndrome. This review will discuss the contradictory findings of IFN-γ in osteoimmunology and its clinical application potential.
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Affiliation(s)
- Mengjia Tang
- Laboratory of Endocrinology and Metabolism, Department of Endocrinology and Metabolism, National Key Laboratory of Biotherapy/Collaborative Innovation Center of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Li Tian
- Laboratory of Endocrinology and Metabolism, Department of Endocrinology and Metabolism, National Key Laboratory of Biotherapy/Collaborative Innovation Center of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Guojing Luo
- Laboratory of Endocrinology and Metabolism, Department of Endocrinology and Metabolism, National Key Laboratory of Biotherapy/Collaborative Innovation Center of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Xijie Yu
- Laboratory of Endocrinology and Metabolism, Department of Endocrinology and Metabolism, National Key Laboratory of Biotherapy/Collaborative Innovation Center of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, Sichuan, China
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Chen Y, Traore YL, Yang S, Lajoie J, Fowke KR, Rickey DW, Ho EA. Implant delivering hydroxychloroquine attenuates vaginal T lymphocyte activation and inflammation. J Control Release 2018; 277:102-113. [PMID: 29545105 DOI: 10.1016/j.jconrel.2018.03.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Accepted: 03/08/2018] [Indexed: 12/24/2022]
Abstract
Evidence suggests that women who are naturally resistant to HIV infection exhibit low baseline immune activation at the female genital tract (FGT). This "immune quiescent" state is associated with lower expression of T-cell activation markers, reduced levels of gene transcription and pro-inflammatory cytokine or chemokine production involved in HIV infection while maintaining an intact immune response against pathogens. Therefore, if this unique immune quiescent state can be pharmacologically induced locally, it will provide an excellent women-oriented strategy against HIV infection To our knowledge, this is the first research article evaluating in vivo, an innovative trackable implant that can provide controlled delivery of hydroxychloroquine (HCQ) to successfully attenuate vaginal T lymphocyte activation and inflammation in a rabbit model as a potential strategy to induce an "immune quiescent" state within the FGT for the prevention of HIV infection. This biocompatible implant can deliver HCQ above therapeutic concentrations in a controlled manner, reduce submucosal immune cell recruitment, improve mucosal epithelium integrity, decrease protein and gene expression of T-cell activation markers, and attenuate the induction of key pro-inflammatory mediators. Our results suggest that microbicides designed to maintain a low level of immune activation at the FGT may offer a promising new strategy for reducing HIV infection.
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Affiliation(s)
- Yufei Chen
- Laboratory for Drug Delivery and Biomaterials, School of Pharmacy, University of Waterloo, Canada; College of Pharmacy, University of Manitoba, Canada
| | - Yannick L Traore
- Laboratory for Drug Delivery and Biomaterials, School of Pharmacy, University of Waterloo, Canada
| | - Sidi Yang
- Laboratory for Drug Delivery and Biomaterials, School of Pharmacy, University of Waterloo, Canada
| | - Julie Lajoie
- Department of Medical Microbiology and Infectious Diseases, University of Manitoba, Canada; Department of Medical Microbiology, University of Nairobi, Kenya
| | - Keith R Fowke
- Department of Medical Microbiology and Infectious Diseases, University of Manitoba, Canada; Department of Community Health Sciences, University of Manitoba, Canada; Department of Medical Microbiology, University of Nairobi, Kenya
| | - Daniel W Rickey
- Department of Radiology, University of Manitoba, Canada; Department of Physics & Astronomy, University of Manitoba, Canada
| | - Emmanuel A Ho
- Laboratory for Drug Delivery and Biomaterials, School of Pharmacy, University of Waterloo, Canada.
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