THE MOST COMPLETE WEBSITE ON CLINICAL TRIALS IN HIV INFECTION (FIRST-LINE, SWITCH, PHASE 2)

Breaking News

Immunologic Biomarkers, Morbidity, and Mortality in Treated HIV Infection

Rosuvastatin slows progression of subclinical atherosclerosis in patients with treated HIV infection

Antiretroviral therapy for the prevention of HIV-1 transmission

HIV Transmission Risk Persists During the First 6 Months of Antiretroviral Therapy

Review of the Efficacy, Safety, and Pharmacokinetics of Raltegravir in Pregnancy

Use of Abacavir and Risk of Cardiovascular Disease Among HIV-Infected Individuals

Rosuvastatin Is Effective to Decrease CD8 T-Cell Activation Only in HIV-Infected Patients With High Residual T-Cell Activation Under Antiretroviral Therapy

Botswana's progress toward achieving the 2020 UNAIDS 90-90-90 antiretroviral therapy and virological suppression goals: a population-based survey

Empirical tuberculosis therapy versus isoniazid in adult outpatients with advanced HIV initiating antiretroviral therapy (REMEMBER): a multicountry open-label randomised controlled trial

Feasibility and efficacy of early lung cancer diagnosis with chest computed tomography in HIV-infected smokers

Patterns of Cardiovascular Mortality for HIV-Infected Adults in the United States: 1999 to 2013

Adjunctive Dexamethasone in HIV-Associated Cryptococcal Meningitis

Outcomes of HIV-associated Hodgkin lymphoma in the era of antiretroviral therapy

CD4+ and CD8+ T-cell kinetics in aviremic HIV-infected patients developing Hodgkin or non-Hodgkin lymphoma

CD8 T-Cell Expansion and Inflammation Linked to CMV Coinfection in ART-treated HIV Infection

Human Immunodeficiency Virus Infection Does Not Worsen Prognosis of Liver Transplantation for Hepatocellular Carcinoma

Ongoing HIV Replication Replenishes Viral Reservoirs During Therapy

Incidence and progression of coronary artery calcium in HIV-infected and HIV-uninfected men

Transient elastography for the detection of hepatic fibrosis in HIV-monoinfected adults with elevated aminotransferases on antiretroviral therapy

Association of immune-activation and senescence markers with non-AIDS-defining comorbidities in HIV-suppressed patients

Effects of randomized rosuvastatin compared with placebo on bone and body composition among HIV-infected adults

Levels of intracellular HIV-DNA in patients with suppressive antiretroviral therapy

Cancer Risk and Use of Protease Inhibitor or Nonnucleoside Reverse Transcriptase Inhibitor–Based Combination Antiretroviral Therapy The D:A:D Study

Time trends for risk of severe age-related diseases in individuals with and without HIV infection in Denmark: a nationwide population-based cohort study

TEMPRANO

START

The effect of cumulating exposure to abacavir on the risk of cardiovascular disease events in patients from the Swiss HIV Cohort Study

Course and Clinical Significance of CD8+ T-Cell Counts in a Large Cohort of HIV-Infected Individuals

Impact of low-level viremia on clinical and virological outcomes in treated HIV-1-infected patients

HIV-1 subtype B-infected MSM may have driven the spread of transmitted resistant strains in France in 2007-12: impact on susceptibility to first-line strategies

Influence of the Timing of Antiretroviral Therapy on the Potential for Normalization of Immune Status in Human Immunodeficiency Virus 1–Infected Individuals

Cross-sectional Comparison of the Prevalence of Age-Associated Comorbidities and Their Risk Factors Between HIV-Infected and Uninfected Individuals: The AGEhIV Cohort Study

CD4/CD8 ratio normalisation and non-AIDS-related events in individuals with HIV who achieve viral load suppression with antiretroviral therapy: an observational cohort study

Baseline HIV-1 resistance, virological outcomes, and emergent resistance in the SECOND-LINE trial: an exploratory analysis

Effects of statin therapy on coronary artery plaque volume and high-risk plaque morphology in HIV-infected patients with subclinical atherosclerosis: a randomised, double-blind, placebo-controlled trial

Low Bone Mineral Density in Patients With Well-Suppressed HIV Infection: Association With Body Weight, Smoking, and Prior Advanced HIV Disease

Early versus delayed initiation of highly active antiretroviral therapy for HIV-positive adults with newly diagnosed pulmonary tuberculosis (TB-HAART): a prospective, international, randomised, placebo-controlled trial

A chronic kidney disease risk score to determine tenofovir safety in a prospective cohort of HIV-positive male veterans

Single-agent tenofovir versus combination emtricitabine plus tenofovir for pre-exposure prophylaxis for HIV-1 acquisition: an update of data from a randomised, double-blind, phase 3 trial

Predicting the outcomes of treatment to eradicate the latent reservoir for HIV-1

Constitutive Siglec-1 expression confers susceptibility to HIV-1 infection of human dendritic cell precursors
Published by François RAFFI

Updated: 3 March, 2020

Ruffin N, et al. PNAS 2019 ; 116 :21685-93

The human dendritic cell (DC) lineage has recently been unraveled by high-dimensional mapping, revealing the existence of a discrete new population of blood circulating DC precursors (pre- DCs). Whether this new DC population possesses specific functional features as compared to the other blood DC subset upon pathogen encounter remained to be evaluated. A unique feature of pre-DCs among blood DCs is their constitutive expression of the viral adhesion receptor Siglec-1.

Here, we show that pre-DCs, but not other blood DC subsets, are susceptible to infection by HIV-1 in a Siglec-1–dependent manner. Siglec-1 mediates pre-DC infection of CCR5- and CXCR4-tropic strains. Infection of pre-DCs is further enhanced in the presence of HIV-2/SIVmac Vpx, indicating that Siglec-1 does not counteract restriction factors such as SAMHD1. Instead, Siglec-1 promotes attachment and fusion of viral particles. HIV-1– infected pre-DCs produce new infectious viral particles that accumulate in intracellular compartments reminiscent of the virus-containing compartment ofmacrophages. Pre-DC activation by toll-like receptor (TLR) ligands induces an antiviral state that inhibits HIV-1 fusion and infection, but Siglec-1 remains functional and mediates replication independent transfer of HIV-1 to activated primary T lymphocytes.
Altogether, Siglec-1–mediated susceptibility to HIV-1 infection of pre-DCs constitutes a unique functional feature thatmight represent a preferential relationship of this emerging cell type with viruses.