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https://www.readbyqxmd.com/read/29773224/early-env-specific-ctls-effectively-suppress-viral-replication-in-shiv-controller-macaques
#1
Jin Fan, Hua Liang, Tao Shen, Shuo Wang, Xiaolin Ji, Cassian Yee, Fengmin Lu, Yiming Shao
Early immunological events in acute HIV infection are thought to fundamentally influence long-term disease outcomes. Though the contribution of Gag-specific CD8 T cell responses to early viral control is well established, little is known about the role of Env-specific CD8 T cell responses in controlling viral replication during acute infection. In a macaque simian-human immunodeficiency virus (SHIV) model, some macaques who were able to control SHIV replication after ART interruption showed expansion of Env-specific CD8 T cell responses during acute infection, compared to macaques who progressed to viral rebound...
May 5, 2018: Cellular Immunology
https://www.readbyqxmd.com/read/29771871/trends-in-antiretroviral-therapy-eligibility-and-coverage-among-children-aged-15-years-with-hiv-infection-20-pepfar-supported-sub-saharan-african-countries-2012-2016
#2
Amanda Burrage, Monita Patel, Kelsey Mirkovic, Eric Dziuban, Wondimu Teferi, Laura Broyles, Emilia Rivadeneira
Rapid disease progression and associated opportunistic infections contribute to high mortality rates among children aged <15 years with human immunodeficiency virus (HIV) infection (1). Antiretroviral therapy (ART) has decreased childhood HIV-associated morbidity and mortality rates over the past decade (2). As accumulating evidence revealed lower HIV-associated mortality with early ART initiation, the World Health Organization (WHO) guidelines broadened ART eligibility for children with HIV infection (2)...
May 18, 2018: MMWR. Morbidity and Mortality Weekly Report
https://www.readbyqxmd.com/read/29770748/the-effect-of-switching-protease-inhibitors-to-raltegravir-on-endothelial-function-in-hiv-infected-patients
#3
Maaike Krikke, Kiki Tesselaar, Guido E L van den Berk, Sigrid A Otto, Laura H Freriks, Steven F L van Lelyveld, Frank J L Visseren, Andy I M Hoepelman, Joop E Arends
Objective Lipid management is one of the cornerstones of cardiovascular risk reduction. Treatment of HIV infection with protease inhibitors (PIs) may cause dyslipidaemia, whilst the integrase inhibitor raltegravir (RAL) has a relatively favorable effect on plasma lipids. We examined the effect of switching from PIs to RAL on endothelial function, and its effect on immunological and inflammatory parameters. Methods We performed a 16-week open-label prospective crossover study: 8 weeks intervention (switch PIs to RAL) and 8 weeks control (unchanged cART regimen)...
April 2018: HIV Clinical Trials
https://www.readbyqxmd.com/read/29769566/antiretroviral-drugs-alter-the-content-of-extracellular-vesicles-from-hiv-1-infected-cells
#4
Catherine DeMarino, Michelle L Pleet, Maria Cowen, Robert A Barclay, Yao Akpamagbo, James Erickson, Nicaise Ndembe, Manhattan Charurat, Jibreel Jumare, Sunday Bwala, Peter Alabi, Max Hogan, Archana Gupta, Nicole Noren Hooten, Michele K Evans, Benjamin Lepene, Weidong Zhou, Massimo Caputi, Fabio Romerio, Walter Royal, Nazira El-Hage, Lance A Liotta, Fatah Kashanchi
To date, the most effective treatment of HIV-1 is a combination antiretroviral therapy (cART), which reduces viral replication and reverses pathology. We investigated the effect of cART (RT and protease inhibitors) on the content of extracellular vesicles (EVs) released from HIV-1-infected cells. We have previously shown that EVs contain non-coding HIV-1 RNA, which can elicit responses in recipient cells. In this manuscript, we show that TAR RNA levels demonstrate little change with the addition of cART treatment in cell lines, primary macrophages, and patient biofluids...
May 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29768184/effectiveness-of-depression-interventions-for-people-living-with-hiv-in-sub-saharan-africa-a-systematic-review-meta-analysis-of-psychological-immunological-outcomes
#5
Ruth Verity Passchier, Melanie Amna Abas, Ikenna D Ebuenyi, Carmine M Pariante
This meta-analytic review evaluated the effectiveness of depression interventions on the psychological and immunological outcomes of people living with HIV in sub-Saharan Africa. 14 studies, yielding 932 participants were eligible. A random-effects models indicated that depression interventions were followed by large reductions in depression scores (effect size = 1.86, 95% CI = 1.71, 2.01, p < 0.01). No significant effect on immune outcome was observed, however there was a trend toward immune improvement of medium effect size (effect size on CD4 count and/or viral suppression = 0...
May 13, 2018: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/29768175/targeting-the-latent-reservoir-for-hiv-1
#6
REVIEW
Srona Sengupta, Robert F Siliciano
Antiretroviral therapy can effectively block HIV-1 replication and prevent or reverse immunodeficiency in HIV-1-infected individuals. However, viral replication resumes within weeks of treatment interruption. The major barrier to a cure is a small pool of resting memory CD4+ T cells that harbor latent HIV-1 proviruses. This latent reservoir is now the focus of an intense international research effort. We describe how the reservoir is established, challenges involved in eliminating it, and pharmacologic and immunologic strategies for targeting this reservoir...
May 15, 2018: Immunity
https://www.readbyqxmd.com/read/29768174/hiv-1-vaccines-based-on-antibody-identification-b-cell-ontogeny-and-epitope-structure
#7
REVIEW
Peter D Kwong, John R Mascola
HIV-1 vaccine development has been stymied by an inability to induce broadly reactive neutralizing antibodies to the envelope (Env) trimer, the sole viral antigen on the virion surface. Antibodies isolated from HIV-1-infected donors, however, have been shown to recognize all major exposed regions of the prefusion-closed Env trimer, and an emerging understanding of the immunological and structural characteristics of these antibodies and the epitopes they recognize is enabling new approaches to vaccine design...
May 15, 2018: Immunity
https://www.readbyqxmd.com/read/29765285/anemia-and-thrombocytopenia-in-the-cohort-of-hiv-infected-adults-in-northwest-ethiopia-a-facility-based-cross-sectional-study
#8
Tekalign Deressa, Debasu Damtie, Meseret Workineh, Meaza Genetu, Mulugeta Melku
Background: Anemia and thrombocytopenia are frequent hematological abnormalities in patients with human immunodeficiency virus (HIV) infection and have been associated with increased morbidity and mortality. However, there is a paucity of data on the prevalence and correlates of these hematological abnormalities among HIV infected adults in Ethiopia. The aim of this study was to determine the prevalence and correlates of anemia and thrombocytopenia in a cohort of HIV-1 infected adults in northwest Ethiopia...
April 2018: EJIFCC
https://www.readbyqxmd.com/read/29762170/a-compartmentalized-type-i-interferon-response-in-the-gut-during-chronic-hiv-1-infection-is-associated-with-immunopathogenesis
#9
Stephanie M Dillon, Kejun Guo, Gregory L Austin, Sara Gianella, Phillip A Engen, Ece A Mutlu, John Losurdo, Garth Swanson, Prachi Chakradeo, Ali Keshavarzian, Alan L Landay, Mario Santiago, Cara Wilson
OBJECTIVE(S): Type I IFN (IFN-I) responses confer both protective and pathogenic effects in persistent virus infections. IFN-I diversity, stage of infection and tissue compartment may account for this dichotomy. The gut is a major site of early HIV-1 replication and microbial translocation, but the nature of the IFN-I response in this compartment remains unclear. DESIGN: Samples were obtained from two IRB-approved cross-sectional studies. The first study included individuals with chronic, untreated HIV-1 infection (n = 24) and age/gender balanced uninfected controls (n = 14)...
May 11, 2018: AIDS
https://www.readbyqxmd.com/read/29759530/emerging-glycobiology-tools-a-renaissance-in-accessibility
#10
REVIEW
Douglas M Oswald, Brian A Cobb
The glycobiology of the immune response is a topic that has garnered increased attention due to a number of key discoveries surrounding IgG function, the specificity of some broadly neutralizing anti-HIV antibodies, cancer immunoregulation by galectin molecules and others. This review is the opening article in a Special Edition of Cellular Immunology focused on glycoimmunology, and has the goal of setting the context for these articles by providing a mini-review of how glycans impact immunity. We also focus on some of the technological and methodological advances in the field of glycobiology that are being deployed to lower the barrier of entry into the glycosciences, and to more fully interrogate the glycome and its function...
April 25, 2018: Cellular Immunology
https://www.readbyqxmd.com/read/29757583/what-immunological-defects-predispose-to-non-tuberculosis-mycobacterial-infections
#11
Esmaeil Mortaz, Milad Moloudizargari, Mohammad Varahram, Mehrnaz Movassaghi, Johan Garssen, Mehdi Kazempour Dizagie, Mehdi Mirsaeidi, Ian M Adcock
Nontuberculous mycobacteria (NTM) are categorized as one of the large and diverse groups of environmental organisms which are abundant in water and soil.  NTM cause a variety of diseases in humans that mainly affect the lung. A predisposition to pulmonary NTM is evident in patients with parenchymal structural diseases including bronchiectasis, emphysema, tuberculosis (TB), cystic fibrosis (CF), rheumatologic lung diseases and other chronic diseases with pulmonary manifestations. Lung infections are not the only consequences of being infected by NTM as they can also infect skin and soft tissue and may also cause lymphadenitis (predominantly in young children) and disseminated disease in human immunodeficiency virus (HIV)-infected patients or those with severely compromised immune system...
April 2018: Iranian Journal of Allergy, Asthma, and Immunology
https://www.readbyqxmd.com/read/29749876/cd4-cell-count-variability-with-repeat-testing-in-south-africa-should-reporting-include-both-absolute-counts-and-ranges-of-plausible-values
#12
Willem Daniel Francois Venter, Matthew F Chersich, Mohammed Majam, Godspower Akpomiemie, Natasha Arulappan, Michelle Moorhouse, Nonkululeko Mashabane, Deborah K Glencross
Although eligibility for antiretroviral treatment is no longer based on CD4 thresholds, CD4 testing remains important. Variation in CD4 cell count complicates initiation of antibiotic prophylaxis, differential diagnoses and assessments of immunological recovery. Five hundred and fifty-three HIV-positive antiretroviral-naïve adults, recruited from inner-city clinics, had three serial CD4 cell count tests. Test 1 was mostly done in a laboratory network supporting primary care clinics, while Tests 2 and 3 were performed in a tertiary-level laboratory...
January 1, 2018: International Journal of STD & AIDS
https://www.readbyqxmd.com/read/29746590/structural-and-immunologic-correlates-of-chemically-stabilized-hiv-1-envelope-glycoproteins
#13
Torben Schiffner, Jesper Pallesen, Rebecca A Russell, Jonathan Dodd, Natalia de Val, Celia C LaBranche, David Montefiori, Georgia D Tomaras, Xiaoying Shen, Scarlett L Harris, Amin E Moghaddam, Oleksandr Kalyuzhniy, Rogier W Sanders, Laura E McCoy, John P Moore, Andrew B Ward, Quentin J Sattentau
Inducing broad spectrum neutralizing antibodies against challenging pathogens such as HIV-1 is a major vaccine design goal, but may be hindered by conformational instability within viral envelope glycoproteins (Env). Chemical cross-linking is widely used for vaccine antigen stabilization, but how this process affects structure, antigenicity and immunogenicity is poorly understood and its use remains entirely empirical. We have solved the first cryo-EM structure of a cross-linked vaccine antigen. The 4.2 Å structure of HIV-1 BG505 SOSIP soluble recombinant Env in complex with a CD4 binding site-specific broadly neutralizing antibody (bNAb) Fab fragment reveals how cross-linking affects key properties of the trimer...
May 2018: PLoS Pathogens
https://www.readbyqxmd.com/read/29740045/exosome-markers-associated-with-immune-activation-and-oxidative-stress-in-hiv-patients-on-antiretroviral-therapy
#14
Sukrutha Chettimada, David R Lorenz, Vikas Misra, Simon T Dillon, R Keith Reeves, Cordelia Manickam, Susan Morgello, Gregory D Kirk, Shruti H Mehta, Dana Gabuzda
Exosomes are nanovesicles released from most cell types including immune cells. Prior studies suggest exosomes play a role in HIV pathogenesis, but little is known about exosome cargo in relation to immune responses and oxidative stress. Here, we characterize plasma exosomes in HIV patients and their relationship to immunological and oxidative stress markers. Plasma exosome fractions were isolated from HIV-positive subjects on ART with suppressed viral load and HIV-negative controls. Exosomes were characterized by electron microscopy, nanoparticle tracking, immunoblotting, and LC-MS/MS proteomics...
May 8, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29738896/resistance-detected-in-pbmcs-predicts-virological-rebound-in-hiv-1-suppressed-patients-switching-treatment
#15
Daniele Armenia, Mauro Zaccarelli, Vanni Borghi, William Gennari, Domenico Di Carlo, Alberto Giannetti, Federica Forbici, Ada Bertoli, Caterina Gori, Lavinia Fabeni, Carmela Pinnetti, Raffaella Marocco, Alessandra Latini, Francesca Ceccherini-Silberstein, Claudio Maria Mastroianni, Cristina Mussini, Andrea Antinori, Carlo Federico Perno, Maria Mercedes Santoro
BACKGROUND: Genotypic resistance test (GRT) performed in peripheral blood mononuclear cells (PBMC) represents a chance to evaluate resistance in virologically suppressed HIV infected patients. OBJECTIVES: To evaluate the impact of baseline resistance detected through PBMC GRT on virological rebound after switching treatment. STUDY DESIGN: Baseline genotypic susceptibility scores (GSS) from PBMC GRT (DNA-GSS) and from previous cumulative plasma GRTs (when available, pRNA-GSS) were evaluated...
April 3, 2018: Journal of Clinical Virology: the Official Publication of the Pan American Society for Clinical Virology
https://www.readbyqxmd.com/read/29737455/current-and-future-use-of-chloroquine-and-hydroxychloroquine-in-infectious-immune-neoplastic-and-neurological-diseases-a-mini-review
#16
REVIEW
Domenico Plantone, Tatiana Koudriavtseva
The process of finding new therapeutic indications for currently used drugs, defined as 'repurposing', is receiving growing attention. Chloroquine and hydroxychloroquine, with an original indication to prevent or cure malaria, have been successfully used to treat several infectious (HIV, Q fever, Whipple's disease, fungal infections), rheumatological (systemic lupus erythematosus, antiphospholipid antibody syndrome, rheumatoid arthritis, Sjögren's syndrome), and other immunological diseases. Indeed, they have anti-inflammatory, immunomodulating, anti-infective, antithrombotic, and metabolic effects...
May 8, 2018: Clinical Drug Investigation
https://www.readbyqxmd.com/read/29731749/adaptive-nkg2c-cd57-natural-killer-cell-and-tim-3-expression-during-viral-infections
#17
Hassen Kared, Serena Martelli, Shu Wen Tan, Yannick Simoni, Meng Li Chong, Siew Hwei Yap, Evan W Newell, Sylvia L F Pender, Adeeba Kamarulzaman, Reena Rajasuriar, Anis Larbi
Repetitive stimulation by persistent pathogens such as human cytomegalovirus (HCMV) or human immunodeficiency virus (HIV) induces the differentiation of natural killer (NK) cells. This maturation pathway is characterized by the acquisition of phenotypic markers, CD2, CD57, and NKG2C, and effector functions-a process regulated by Tim-3 and orchestrated by a complex network of transcriptional factors, involving T-bet, Eomes, Zeb2, promyelocytic leukemia zinc finger protein, and Foxo3. Here, we show that persistent immune activation during chronic viral co-infections (HCMV, hepatitis C virus, and HIV) interferes with the functional phenotype of NK cells by modulating the Tim-3 pathway; a decrease in Tim-3 expression combined with the acquisition of inhibitory receptors skewed NK cells toward an exhausted and cytotoxic phenotype in an inflammatory environment during chronic HIV infection...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29730983/the-challenge-of-aging-and-pharmacoterapeutic-complexity-in-the-hiv-patient
#18
Ramón Morillo-Verdugo, José Ramón Blanco Ramos, Laila Abdel-Kader Martín, María Álvarez de Sotomayor
OBJECTIVE: To describe the current knowledge and management of aging and  pharmacotherapeutic complexity in HIV + patients. METHOD: A review of literature was carried out, including articles, originals or  reviews, published in English or Spanish, from 2007 to 2017, which analysed the aging and pharmacotherapeutic complexity in HIV + patients. The terms  «Polypharmacy»/»Polypharmacy», «Aging»/»Aging», «Frailty»/»Fragility»,  «Pharmacotherapeutic Complexity»/»Medication Regimen Complexity» and  «HIV»/"HIV» were combined...
May 1, 2018: Farmacia Hospitalaria
https://www.readbyqxmd.com/read/29722823/immunogenicity-and-immunological-memory-induced-by-the-13-valent-pneumococcal-conjugate-followed-by-the-23-valent-polysaccharide-vaccine-in-hiv-infected-adults
#19
Paraskevi F Farmaki, Maria C Chini, Nikolaos M Mangafas, Marianna T Tzanoudaki, Christina P Piperi, Marios Z Lazanas, Vana S Spoulou
Background: Vaccine-induced memory B-cell (MBC) subsets have distinct roles in the establishment of protective immunity; MBCs expressing nonswitched immunoglobulin M (IgM+ MBCs) replenish the MBC pool, whereas MBCs expressing isotype-switched immunoglobulin (sIg+ MBCs) differentiate into plasma cells upon antigen reencounter. We investigated immunogenicity and MBCs induced by combined 13-valent pneumococcal conjugate vaccine (PCV13) and 23-valent pneumococcal polysaccharide vaccine (PPV23) in human immunodeficiency virus (HIV)-infected adults...
May 2, 2018: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/29722482/five-year-neurodevelopment-outcomes-of-perinatally-hiv-infected-children-on-early-limited-or-deferred-continuous-antiretroviral-therapy
#20
Barbara Laughton, Morna Cornell, Martin Kidd, Priscilla Estelle Springer, Els Françoise Marie-Thérèse Dobbels, Anita Janse Van Rensburg, Kennedy Otwombe, Abdel Babiker, Diana M Gibb, Avy Violari, Mariana Kruger, Mark Fredric Cotton
INTRODUCTION: Early antiretroviral therapy (ART) has improved neurodevelopmental outcomes of HIV-infected (HIV-positive) children; however, little is known about the longer term outcomes in infants commencing early ART or whether temporary ART interruption might have long-term consequences. In the children with HIV early antiretroviral treatment (CHER) trial, HIV-infected infants ≤12 weeks of age with CD4 ≥25% were randomized to deferred ART (ART-Def); immediate time-limited ART for 40 weeks (ART-40W) or 96 weeks (ART-96W)...
May 2018: Journal of the International AIDS Society
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