Abstract:
INTRODUCTION:Within monocyte-derived macrophages, HIV-1 accumulates in intracellular virus-containing compartments (VCCs) that are inaccessible to the external environment, which implicate these cells as latently infected HIV-1 reservoirs. During mother-to-child transmission of HIV-1, human placental macrophages (Hofbauer cells (HCs)) are viral targets, and have been shown to be infected in vivo and sustain low levels of viral replication in vitro; however, the risk of in utero transmission is less than 7%. The role of these primary macrophages as viral reservoirs is largely undefined. The objective of this study is to define potential sites of viral assembly, accumulation and neutralization in HCs given the pivotal role of the placenta in preventing HIV-1 infection in the mother-infant dyad. METHODS:Term placentae from 20 HIV-1 seronegative women were obtained following caesarian section. VCCs were evaluated by 3D confocal and electron microscopy. Colocalization R values (Pearson's correlation) were quantified with colocalization module of Volocity 5.2.1. Replication kinetics and neutralization studies were evaluated using p24 ELISA. RESULTS:We demonstrate that primary HCs assemble and sequester HIV-1(BaL) in intracellular VCCs, which are enriched in endosomal/lysosomal markers, including CD9, CD81, CD63 and LAMP-1. Following infection, we observed HIV-1 accumulation in potentially acidic compartments, which stained intensely with Lysotracker-Red. Remarkably, these compartments are readily accessible via the cell surface and can be targeted by exogenously applied small molecules and HIV-1-specific broadly neutralizing antibodies. In addition, broadly neutralizing antibodies (4E10 and VRC01) limited viral replication by HIV-1-infected HCs, which may be mediated by FcγRI. CONCLUSIONS:These findings suggest that placental HCs possess intrinsic adaptations facilitating unique sequestration of HIV-1, and may serve as a protective viral reservoir to permit viral neutralization and/or antiretroviral drug entry in utero.
journal_name
J Int AIDS Socjournal_title
Journal of the International AIDS Societyauthors
Johnson EL,Chu H,Byrareddy SN,Spearman P,Chakraborty Rdoi
10.7448/IAS.18.1.19385subject
Has Abstractpub_date
2015-01-22 00:00:00pages
19385issn
1758-2652pii
19385journal_volume
18pub_type
杂志文章abstract:BACKGROUND:Young people in southern and eastern Africa remain disproportionately vulnerable to HIV with gender inequalities and livelihood insecurities being key drivers of this. Behavioural HIV prevention interventions have had weak outcomes and a new generation of structural interventions have emerged seeking to chal...
journal_title:Journal of the International AIDS Society
pub_type: 杂志文章,评审
doi:10.7448/IAS.15.3.17362
更新日期:2012-06-14 00:00:00
abstract:INTRODUCTION:The Robert Koch Institute (RKI) aimed to assess a molecular surveillance strategy based on filter-dried serum spots (DSS) of all newly diagnosed HIV infections in Germany. In 2013, diagnostic laboratories sent DSS to the RKI representing 55% of the newly diagnosed HIV infections reported to the RKI (protec...
journal_title:Journal of the International AIDS Society
pub_type: 杂志文章
doi:10.7448/IAS.17.4.19670
更新日期:2014-11-02 00:00:00
abstract:INTRODUCTION:Women in sub-Saharan Africa spend a substantial portion of their reproductive lives pregnant and/or breastfeeding (P/BF), yet they have limited options to prevent HIV during these maternal stages. In preparation for phase 3b prevention trials in P/BF women, we explored attitudes about using a vaginal ring ...
journal_title:Journal of the International AIDS Society
pub_type: 杂志文章
doi:10.1002/jia2.25536
更新日期:2020-06-01 00:00:00
abstract::The strength of the evidence linking concurrency to HIV epidemic severity in southern and eastern Africa led the Joint United Nations Programme on HIV/AIDS and the Southern African Development Community in 2006 to conclude that high rates of concurrent sexual partnerships, combined with low rates of male circumcision ...
journal_title:Journal of the International AIDS Society
pub_type: 杂志文章,评审
doi:10.1186/1758-2652-14-13
更新日期:2011-03-15 00:00:00
abstract:INTRODUCTION:Despite significant gains in access to early infant diagnosis (EID) over the past decade, most HIV-exposed infants still do not get tested for HIV in the first two months of life. For those who are tested, the long turnaround time between when the sample is drawn and when the results are returned leads to ...
journal_title:Journal of the International AIDS Society
pub_type: 杂志文章,评审
doi:10.7448/IAS.18.7.20299
更新日期:2015-12-02 00:00:00
abstract:INTRODUCTION:Numerous barriers to optimal uptake of prevention of mother to child transmission (PMTCT) services occur at community level (i.e., outside the healthcare setting). To achieve elimination of paediatric HIV, therefore, interventions must also work within communities to address these barriers and increase ser...
journal_title:Journal of the International AIDS Society
pub_type: 杂志文章,评审
doi:10.7448/IAS.15.4.17373
更新日期:2012-07-11 00:00:00
abstract:INTRODUCTION:The relative efficacy of different antiretroviral (ART) regimens has been extensively evaluated in the context of clinical trials, using HIV viral load (VL) measurements at pre-specified timepoints after ART onset. However, data from real-life studies using combined longitudinal measurements of cumulative ...
journal_title:Journal of the International AIDS Society
pub_type: 杂志文章
doi:10.1002/jia2.25397
更新日期:2019-11-01 00:00:00
abstract:INTRODUCTION:Treat-all is being implemented in several African settings, in accordance with 2015 World Health Organisation guidelines. The factors known to undermine adherence to antiretroviral therapy (ART) may change in the context of Treat-all, where people living with HIV (PLHIV) increasingly initiate ART at earlie...
journal_title:Journal of the International AIDS Society
pub_type: 杂志文章
doi:10.1002/jia2.25220
更新日期:2019-01-01 00:00:00
abstract:INTRODUCTION:Evidence suggests that people who inject drugs often begin their drug use and injecting practices in adolescence, yet there are limited data available on the HIV epidemic and the responses for this population. The comprehensive package of interventions for the prevention, treatment and care of HIV infectio...
journal_title:Journal of the International AIDS Society
pub_type: 杂志文章
doi:10.7448/IAS.18.2.19442
更新日期:2015-02-26 00:00:00
abstract:INTRODUCTION:The majority of new HIV infections occur through mucosal transmission. The availability of readily applicable and accessible platforms for anti-retroviral (ARV) delivery is critical for the prevention of HIV acquisition through sexual transmission in both women and men. There is a compelling need for devel...
journal_title:Journal of the International AIDS Society
pub_type: 杂志文章
doi:10.1002/jia2.25628
更新日期:2020-10-01 00:00:00
abstract:INTRODUCTION:Older adults living with HIV (OALHIV; ≥50 years) who use drugs face unique needs and challenges that compromise their health and wellbeing due to the structural and environmental barriers they experience, in addition to being disproportionately affected by comorbidities. Nevertheless, research on this popu...
journal_title:Journal of the International AIDS Society
pub_type: 杂志文章
doi:10.1002/jia2.25577
更新日期:2020-08-01 00:00:00
abstract:: The HIV/AIDS epidemic continues to be a major issue facing Botswana, with overall adult HIV prevalence estimated to be 25.7 percent in 2007. This paper estimates the cost and impact of the draft Ministry of Health male circumcision strategy using the UNAIDS/WHO Decision-Makers' Programme Planning Tool (DMPPT). Demogr...
journal_title:Journal of the International AIDS Society
pub_type: 杂志文章
doi:10.1186/1758-2652-12-7
更新日期:2009-05-27 00:00:00
abstract:INTRODUCTION:Lopinavir/ritonavir-based antiretroviral therapy (ART) is recommended for all HIV-infected children less than three years. However, little is known about its field implementation and effectiveness in West Africa. We assessed the 12-month response to lopinavir/ritonavir-based antiretroviral therapy in a coh...
journal_title:Journal of the International AIDS Society
pub_type: 杂志文章
doi:10.7448/IAS.20.01.21362
更新日期:2017-04-25 00:00:00
abstract:INTRODUCTION:Several factors such as duration of infection, age, male gender, consumption of alcohol, HIV infection and low CD4 count have been associated with fibrosis progression rate. However, it is relatively scarce, the knowledge about the liver fibrosis progression rate in HIV-infected patients with undetectable ...
journal_title:Journal of the International AIDS Society
pub_type: 杂志文章
doi:10.7448/IAS.17.4.19636
更新日期:2014-11-02 00:00:00
abstract:INTRODUCTION:Ethiopia has recently adopted lifelong antiretroviral therapy (ART) for all HIV-positive pregnant and breastfeeding women (Option B+ strategy), regardless of CD4 count or clinical stage. However, the exact timing and predictors of loss to follow-up (LFU) are unknown. Thus, we examined the levels and determ...
journal_title:Journal of the International AIDS Society
pub_type: 杂志文章
doi:10.7448/IAS.19.1.20662
更新日期:2016-03-21 00:00:00
abstract:INTRODUCTION:The Good Participatory Practice (GPP): Guidelines for Biomedical HIV Prevention Trials, second edition (2011) were developed to provide clinical trial sponsors and implementers with a formal stakeholder engagement framework. As one of the largest African research institutes, Wits Reproductive Health and HI...
journal_title:Journal of the International AIDS Society
pub_type: 杂志文章
doi:10.1002/jia2.25175
更新日期:2018-10-01 00:00:00
abstract:INTRODUCTION:Oral pre-exposure prophylaxis (PrEP) is a promising new prevention approach for those most at risk of HIV infection. However, there are concerns that behavioural disinhibition, specifically reductions in condom use, might limit PrEP's protective effect. This study uses the case of female sex workers (FSWs)...
journal_title:Journal of the International AIDS Society
pub_type: 杂志文章
doi:10.7448/IAS.20.1.21744
更新日期:2017-09-20 00:00:00
abstract:INTRODUCTION:Critical technological advances have yielded a toolkit of HIV prevention strategies. This literature review sought to provide contextual and historical reflection needed to bridge the conceptual gap between clinical efficacy and community effectiveness (i.e. knowledge and usage) of existing HIV prevention ...
journal_title:Journal of the International AIDS Society
pub_type: 杂志文章,评审
doi:10.7448/IAS.19.1.21092
更新日期:2016-09-30 00:00:00
abstract:INTRODUCTION:The long-term effects of an intensified induction regimen are unknown. In this pilot, randomized, prospective study we evaluate the effect of a short-term four-drugs induction regimen in patients with high baseline viral load. METHODS:Naive patients with HIV-RNA>100.000 copies/ml receiving TDF+FTC+EFV+RAL...
journal_title:Journal of the International AIDS Society
pub_type: 杂志文章
doi:10.7448/IAS.17.4.19776
更新日期:2014-11-02 00:00:00
abstract:INTRODUCTION:It is estimated that over half of newly diagnosed HIV infections in Europe present late. An HIV positive individual presenting late to care represents a missed opportunity to benefit from treatment, increasing the risk of morbidity and mortality at an individual level, and onward disease transmission at po...
journal_title:Journal of the International AIDS Society
pub_type: 杂志文章
doi:10.7448/IAS.17.4.19690
更新日期:2014-11-02 00:00:00
abstract:INTRODUCTION:Limited data exist on acceptability of candidate pre-exposure prophylaxis (PrEP) regimens among US women. We evaluated PrEP experiences, attitudes and future use intentions among sexually active women who completed the US-based HIV Prevention Trials Network 069/AIDS Clinical Trials Group 5305 study. METHO...
journal_title:Journal of the International AIDS Society
pub_type: 杂志文章,随机对照试验
doi:10.1002/jia2.25247
更新日期:2019-03-01 00:00:00
abstract:INTRODUCTION:Scientific research has demonstrated the clinical benefits of earlier initiation of antiretroviral treatment (ART), and that ART can markedly reduce HIV transmission to sexual partners. Ensuring universal access to ART for those who need it has long been a core principle of the HIV response, and extending ...
journal_title:Journal of the International AIDS Society
pub_type: 杂志文章
doi:10.7448/IAS.17.1.19320
更新日期:2014-07-18 00:00:00
abstract:INTRODUCTION:Low bone mineral density (BMD) and osteoporosis are prevalent in HIV-infected patients and were associated with HIV infection and tenofovir-containing ART. MATERIALS AND METHODS:The GUSTA study (GUided Simplification with Tropism Assay) is a two-arm, prospective, multicenter, 1:1 randomized controlled tri...
journal_title:Journal of the International AIDS Society
pub_type: 杂志文章
doi:10.7448/IAS.17.4.19816
更新日期:2014-11-02 00:00:00
abstract:INTRODUCTION:We compared the effectiveness of tenofovir/emtricitabine (TDF/FTC) combined with either lopinavir/r (LPV/r) or another recommended third drug in the 2010 French guidelines in antiretroviral-naïve patients starting combination antiretroviral therapy in 2004-2008 in the French Hospital Database on HIV. METH...
journal_title:Journal of the International AIDS Society
pub_type: 杂志文章
doi:10.7448/IAS.17.1.19070
更新日期:2014-09-25 00:00:00
abstract:BACKGROUND:The aim of our study was to assess the extent of late presentation for HIV care in Northern Greece during the period 2000 to 2010 and to explore correlations aiming to provide guidance for future interventions. METHODS:HIV-positive patients with no prior history of HIV care at presentation and with a CD4 T ...
journal_title:Journal of the International AIDS Society
pub_type: 杂志文章
doi:10.7448/IAS.15.2.17395
更新日期:2012-10-11 00:00:00
abstract:INTRODUCTION:Recent data indicates that low vitamin D (25(OH)D) levels can lead to a worst prognosis in HIV-infected individuals, even in those on successful antiretroviral therapy (ART) [1]. Portugal is the European country that has the largest average sun exposure time but prevalence of hypovitaminosis D is mostly un...
journal_title:Journal of the International AIDS Society
pub_type: 杂志文章
doi:10.7448/IAS.17.4.19826
更新日期:2014-11-02 00:00:00
abstract:INTRODUCTION:Global HIV-1 prevalence is 35.3 million [1]; women comprise >50% of those infected. The majority of women may lack regular care and only one-fourth are virologically suppressed [2]. ELLA is a cross-sectional, non-interventional study conducted across Europe, Latin America, Canada and Asia that describes ba...
journal_title:Journal of the International AIDS Society
pub_type: 杂志文章
doi:10.7448/IAS.17.4.19616
更新日期:2014-11-02 00:00:00
abstract::[This corrects the article DOI: 10.7448/IAS.20.01/21317.]. ...
journal_title:Journal of the International AIDS Society
pub_type: 已发布勘误
doi:10.7448/IAS.20.1.22066
更新日期:2017-06-02 00:00:00
abstract:INTRODUCTION:Transactional sex is a structural driver of HIV for women and girls in sub-Saharan Africa. In transactional relationships, sexual and economic obligations intertwine and may have positive and negative effects on women's financial standing and social status. We conducted a clinic-based survey with pregnant ...
journal_title:Journal of the International AIDS Society
pub_type: 杂志文章
doi:10.7448/IAS.20.1.21554
更新日期:2017-07-18 00:00:00
abstract:INTRODUCTION:Linkage from HIV testing and counselling (HTC) to initiation of antiretroviral therapy (ART) is suboptimal in many national programmes in sub-Saharan Africa, leading to delayed initiation of ART and increased risk of death. Reasons for failure of linkage are poorly understood. METHODS:Semi-structured qual...
journal_title:Journal of the International AIDS Society
pub_type: 杂志文章
doi:10.7448/IAS.15.2.18020
更新日期:2012-12-31 00:00:00