Abstract:
INTRODUCTION:Disruption in bone homeostasis with increased osteoclastic resorption may lead to osteoporosis. HIV tat has been found to increase differentiation of precursor cells into osteoclast (OC) (1). Presence of soluble HIV proteins in virally suppressed HIV patients on ART may drive a bone resorption phenotype. We investigated the role of soluble HIV proteins (tat, gp120 Mn and Bal, rev and p55-gag) on osteoclastogenesis and OC resorptive capacity. METHODS:Mouse monocyte RAW 264.7 cells were cultured in vitro and induced to differentiate into OCs with 50 ng/mL RANKL and 25 ng/mL mCSF. Medium was supplemented with 100 ng/mL of recombinant HIV tat, gp120 (Mn and Bal), rev, nef and p55-gag, respectively, with zolendronate as negative control. Differentiated OCs were stained for TRAP and counted. OC resorption function was examined by culturing differentiated OCs (in the presence of respective HIV proteins) on dentin-coated plates and examining the following (i) sealing zone formation, (ii) volume of resorption pits and (iii) area of resorption pits per field using confocal microscopy. Expression of OC specific genes including NFATc1 and cathepsin K was investigated by qPCR. Reactive oxygen species (ROS) production is essential in RANKL-induced OC differentiation (2),3; effect of these proteins on ROS production was assessed using the fluorescent H2DCFH-DA. Mean fluorescence intensity was then measured by flow cytometry. TNFα production by OC precursors when incubated with tat and rev was measured by ELISA. RESULTS:Tat and rev treatment was associated with increased OC formation by 70 and 26%, respectively (p<0.01), relative to control, while zolendronate significantly inhibited OC formation by 75%. Gp120 Mn and Bal, nef and p55-gag treatment had no effect on OC differentiation. Interestingly, neither tat nor rev treatment caused significant increases in sealing zone formation but increased dentin resorption pit area by 28 and 19%, respectively, and resorption pit volume by 11 and 6%, respectively. Tat protein treatment was associated with upregulation of NFATc1 and cathepsin K mRNA expression by 20 and 15%, respectively. Incubation with tat and rev led to a dose-dependent increase in intracellular ROS production in the monocytes and OC precursors and significant upregulation in TNFα cytokine production by the OC precursors. CONCLUSIONS:In addition to their effect of OC differentiation, we demonstrated the effects of tat and rev on OC resorption. HIV tat and rev are both biologically active in driving a pro-osteoclastic phenotype.
journal_name
J Int AIDS Socjournal_title
Journal of the International AIDS Societyauthors
Chew N,Tan E,Li L,Lim Rdoi
10.7448/IAS.17.4.19724subject
Has Abstractpub_date
2014-11-02 00:00:00pages
19724issue
4 Suppl 3issn
1758-2652pii
19724journal_volume
17pub_type
杂志文章abstract:INTRODUCTION:Since June 2016, the national HIV programme in Malawi has adopted Universal Test and Treat (UTT) guidelines requiring that all persons who test HIV positive will be referred to start antiretroviral therapy (ART). Although there is strong evidence from clinical trials that early initiation of ART leads to r...
journal_title:Journal of the International AIDS Society
pub_type: 杂志文章
doi:10.1002/jia2.25239
更新日期:2019-02-01 00:00:00
abstract:BACKGROUND:Diagnosis of primary HIV infection (PHI) has important clinical and public health implications. HAART initiation at this stage remains controversial. METHODS:Our objective was to identify predictors of disease progression among Argentinean seroconverters during the first year of infection, within a multicen...
journal_title:Journal of the International AIDS Society
pub_type: 杂志文章
doi:10.1186/1758-2652-14-40
更新日期:2011-08-10 00:00:00
abstract:INTRODUCTION:Global guidelines emphasize the ethical obligation of investigators to help participants in HIV-endpoint trials reduce HIV risk by offering an optimal HIV prevention package. Oral pre-exposure prophylaxis (PrEP) has increasingly become part of state-of-the-art HIV prevention. Here we describe the process o...
journal_title:Journal of the International AIDS Society
pub_type: 杂志文章,随机对照试验
doi:10.1002/jia2.25491
更新日期:2020-05-01 00:00:00
abstract:INTRODUCTION:Women living with HIV (WLWH) are reportedly at increased risk of invasive cervical cancer (ICC). WLWH in Denmark attend the National ICC screening program less often than women in the general population. We aimed to estimate the incidence of cervical dysplasia and ICC in WLWH in Denmark. METHODS:We studie...
journal_title:Journal of the International AIDS Society
pub_type: 杂志文章
doi:10.7448/IAS.17.4.19646
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: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:INTRODUCTION:Lipodystrophy is still a matter of concern in HIV+ patients receiving ART. However, long-term fat change in patients taking non-thymidine regimens is not well known. MATERIALS AND METHODS:A prospective ongoing fat change assessment including clinical evaluation and dexa scans (Hologic QDR 4500) is being c...
journal_title:Journal of the International AIDS Society
pub_type: 杂志文章
doi:10.7448/IAS.17.4.19553
更新日期:2014-11-02 00:00:00
abstract:BACKGROUND:The primary objective of this study was to determine the prevalence of neurocognitive impairment among HIV-positive individuals in Botswana, using the International HIV Dementia Scale (IHDS). We also compared performance on the IHDS with performance on tests of verbal learning/memory and processing speed, an...
journal_title:Journal of the International AIDS Society
pub_type: 杂志文章
doi:10.1186/1758-2652-13-15
更新日期:2010-04-20 00:00:00
abstract:INTRODUCTION:Stigma associated with HIV has been documented as a barrier for accessing quality health-related services. When the stigma manifests in the health care setting, people living with HIV receive substandard services or even be denied care altogether. Although the consequences of HIV stigma have been documente...
journal_title:Journal of the International AIDS Society
pub_type: 杂志文章,随机对照试验
doi:10.7448/IAS.16.3.18670
更新日期:2013-11-13 00:00:00
abstract:INTRODUCTION:Cenicriviroc (CVC), a once-daily, dual CCR5/CCR2 co-receptor antagonist, has completed Phase 2b development. CVC demonstrated favourable safety and similar efficacy compared with efavirenz (EFV) in Study 202 (NCT01338883); an ex vivo sub-analysis evaluated treatment effects on HIV entry, measured by intrac...
journal_title:Journal of the International AIDS Society
pub_type: 杂志文章
doi:10.7448/IAS.17.4.19531
更新日期:2014-11-02 00:00:00
abstract:INTRODUCTION:Qualitative research on antiretroviral therapy (ART) adherence interventions can provide a deeper understanding of intervention facilitators and barriers. This systematic review aims to synthesize qualitative evidence of interventions for improving ART adherence and to inform patient-centred policymaking. ...
journal_title:Journal of the International AIDS Society
pub_type: 杂志文章,评审
doi:10.7448/IAS.19.1.21166
更新日期:2016-10-17 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:INTRODUCTION:Optimal adherence to antiretroviral therapy is closely related with suppression of the HIV viral load in plasma, slowing disease progression and decreasing HIV transmission rates. Despite its importance, the estimated proportion of people living with HIV in Latin America and the Caribbean with optimal adhe...
journal_title:Journal of the International AIDS Society
pub_type: 杂志文章,meta分析
doi:10.1002/jia2.25066
更新日期:2018-01-01 00:00:00
abstract:INTRODUCTION:Although hepatitis C virus (HCV) screening is recommended for all HIV-infected patients initiating antiretroviral therapy, data on epidemiologic characteristics of HCV infection in resource-limited settings are scarce. METHODS:We searched PubMed and EMBASE for studies assessing the prevalence of HCV infec...
journal_title:Journal of the International AIDS Society
pub_type: 杂志文章,meta分析,评审
doi:10.7448/IAS.19.1.20711
更新日期:2016-06-09 00:00:00
abstract:INTRODUCTION:Injecting drug use (IDU) is associated with tuberculosis but few data are available from low-income settings. We examined IDU in relation to active and latent tuberculosis (LTBI) among HIV-positive individuals in Indonesia, which has a high burden of tuberculosis and a rapidly growing HIV epidemic strongly...
journal_title:Journal of the International AIDS Society
pub_type: 杂志文章
doi:10.7448/IAS.18.1.19317
更新日期:2015-02-16 00:00:00
abstract:INTRODUCTION:Lamivudine (3TC) and emtricitabine (FTC) are considered interchangeable by HIV-1 guidelines in first-line tenofovir/efavirenz (TDF/EFV) and TDF/nevirapine (NVP) combination antiretroviral therapy (cART). Data from trials on equivalence of 3TC and FTC are inconsistent. We examined the effectiveness of 3TC a...
journal_title:Journal of the International AIDS Society
pub_type: 杂志文章
doi:10.7448/IAS.17.4.19491
更新日期:2014-11-02 00:00:00
abstract:INTRODUCTION:Safer conception strategies minimize HIV risk during condomless sex to become pregnant. Gaps remain in understanding the acceptability, feasibility and choices HIV-serodiscordant couples make when multiple safer conception options are available. METHODS:We conducted a pilot study of a comprehensive safer ...
journal_title:Journal of the International AIDS Society
pub_type: 杂志文章
doi:10.1002/jia2.25261
更新日期:2019-04-01 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: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:Poor access of lesbian, gay, bisexual and transgender (LGBT) people to healthcare providers with clinical and cultural competency contributes to health inequalities between heterosexual/cisgender and LGBT people. This systematic review assesses the effect of educational curricula and training for healthcar...
journal_title:Journal of the International AIDS Society
pub_type: 杂志文章,评审
doi:10.7448/IAS.20.1.21624
更新日期:2017-07-19 00:00:00
abstract:INTRODUCTION:Guidelines regarding antiretroviral therapy (ART) initiation in HIV infection have varied over time, with the 2015 World Health Organization recommendation suggesting ART initiation at the time of diagnosis regardless of CD4 T-cell counts. Herein, we investigated the influence of socio-demographic and clin...
journal_title:Journal of the International AIDS Society
pub_type: 杂志文章
doi:10.1002/jia2.25034
更新日期:2018-02-01 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: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:Clinicians often do not have the time and possibilities to read all scientific evidence necessary to maintain high quality patient care. They rely on guidelines made by experts to help them in their daily work. METHODS:We compared the 2012 recommendations and the arguments of the IAS-USA Panel with the da...
journal_title:Journal of the International AIDS Society
pub_type: 杂志文章
doi:10.7448/IAS.17.4.19766
更新日期:2014-11-02 00:00:00
abstract:INTRODUCTION:Although individual HIV rapid diagnostic tests (RDTs) show good performance in evaluations conducted by WHO, reports from several African countries highlight potentially significant performance issues. Despite widespread use of RDTs for HIV diagnosis in resource-constrained settings, there has been no syst...
journal_title:Journal of the International AIDS Society
pub_type: 杂志文章,多中心研究
doi:10.7448/IAS.20.1.21345
更新日期:2017-03-24 00:00:00
abstract:INTRODUCTION:Recent debates on how to achieve an optimal HIV response are dominated by intervention strategies that fail to recognize children's role in the community response to HIV. Whilst formal responses are key to the HIV response, they must recognize and build on indigenous community resources. This study examine...
journal_title:Journal of the International AIDS Society
pub_type: 杂志文章
doi:10.7448/IAS.16.1.18468
更新日期:2013-02-04 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:HIV prevalence is declining in key populations in Armenia including in people who inject drugs (PWID), men who have sex with men, prison inmates, and female sex workers (FSWs); however, prevalence is increasing among Armenians who seasonally migrate to work in countries with higher HIV prevalence, primaril...
journal_title:Journal of the International AIDS Society
pub_type: 杂志文章
doi:10.7448/IAS.19.1.20772
更新日期:2016-06-07 00:00:00
abstract:INTRODUCTION:Antiretroviral treatment (ART) has been scaled up over the last decade but compared to adults, children living with HIV are less likely to receive ART. Moreover, children and adolescents are more vulnerable than adults to virological failure (VF) and emergence of drug resistance. In this study we determine...
journal_title:Journal of the International AIDS Society
pub_type: 杂志文章
doi:10.7448/IAS.19.1.20683
更新日期:2016-04-27 00:00:00
abstract:INTRODUCTION:HIV and syphilis testing rates remain low among men who have sex with men (MSM) in low- and middle-income countries (LMICs). Community engagement has been increasingly used to promote HIV testing among key populations in high-income countries, often in settings with stronger civil society. This study aimed...
journal_title:Journal of the International AIDS Society
pub_type: 杂志文章
doi:10.7448/IAS.20.01.21372
更新日期:2017-04-03 00:00:00