keyword
MENU ▼
Read by QxMD icon Read
search

Hiv entry

keyword
https://www.readbyqxmd.com/read/29782334/inhibitors-of-the-hiv-1-capsid-a-target-of-opportunity
#1
Stephanie K Carnes, Jonathan H Sheehan, Christopher Aiken
PURPOSE OF REVIEW: To summarize recent advances in the discovery of chemical inhibitors targeting the HIV capsid and research on their mechanisms of action. RECENT FINDINGS: HIV infection is critically dependent on functions of the viral capsid. Numerous studies have reported the identification of a variety of compounds that bind to the capsid protein; some of these inhibit reverse transcription and nuclear entry, steps required for infection. Other capsid-targeting compounds appear to act by perturbing capsid assembly, resulting in noninfectious progeny virions...
May 18, 2018: Current Opinion in HIV and AIDS
https://www.readbyqxmd.com/read/29779162/beyond-social-desirability-bias-investigating-inconsistencies-in-self-reported-hiv-testing-and-treatment-behaviors-among-hiv-positive-adults-in-north-west-province-south-africa
#2
Alyssa C Mooney, Chadwick K Campbell, Mary-Jane Ratlhagana, Jessica S Grignon, Sipho Mazibuko, Emily Agnew, Hailey Gilmore, Scott Barnhart, Adrian Puren, Starley B Shade, Teri Liegler, Sheri A Lippman
This mixed-methods study used qualitative interviews to explore discrepancies between self-reported HIV care and treatment-related behaviors and the presence of antiretroviral medications (ARVs) in a population-based survey in South Africa. ARV analytes were identified among 18% of those reporting HIV-negative status and 18% of those reporting not being on ART. Among participants reporting diagnosis over a year prior, 19% reported multiple HIV tests in the past year. Qualitative results indicated that participant misunderstandings about their care and treatment played a substantial role in reporting inaccuracies...
May 19, 2018: AIDS and Behavior
https://www.readbyqxmd.com/read/29777772/improving-maraviroc-oral-bioavailability-by-formation-of-solid-drug-nanoparticles
#3
Alison C Savage, Lee M Tatham, Marco Siccardi, Trevor Scott, Manoli Vourvahis, Andrew Clark, Steve P Rannard, Andrew Owen
Oral drug administration remains the preferred approach for treatment of HIV in most patients. Maraviroc (MVC) is the first in class co-receptor antagonist, which blocks HIV entry into host cells. MVC has an oral bioavailability of approximately 33%, which is limited by poor permeability as well as affinity for CYP3A and several drug transporters. While once-daily doses are now the favoured option for HIV therapy, dose-limiting postural hypotension has been of theoretical concern when administering doses high enough to achieve this for MVC (particularly during coadministration of enzyme inhibitors)...
May 16, 2018: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/29772712/inhibition-of-human-immunodeficiency-virus-type-1-entry-by-a-keggin-polyoxometalate
#4
Xiaoli Wang, Jiao Wang, Wenmei Zhang, Boye Li, Ying Zhu, Qin Hu, Yishu Yang, Xiaoguang Zhang, Hong Yan, Yi Zeng
Here, we report the anti-human immunodeficiency virus (HIV) potency and underlying mechanisms of a Keggin polyoxometalate (PT-1, K₆HPTi₂W10 O40 ). Our findings showed that PT-1 exhibited highly potent effects against a diverse group of HIV type 1 (HIV-1) strains and displayed low cytotoxicity and genotoxicity. The time-addition assay revealed that PT-1 acted at an early stage of infection, and these findings were supported by the observation that PT-1 had more potency against Env-pseudotyped virus than vesicular stomatitis virus glycoprotein (VSVG) pseudotyped virus...
May 16, 2018: Viruses
https://www.readbyqxmd.com/read/29772704/lateral-membrane-heterogeneity-regulates-viral-induced-membrane-fusion-during-hiv-entry
#5
Rodion J Molotkovsky, Veronika V Alexandrova, Timur R Galimzyanov, Irene Jiménez-Munguía, Konstantin V Pavlov, Oleg V Batishchev, Sergey A Akimov
Sphingomyelin- and cholesterol- enriched membrane domains, commonly referred to as "rafts" play a crucial role in a large number of intra- and intercellular processes. Recent experiments suggest that not only the volumetric inhomogeneity of lipid distribution in rafts, but also the arrangement of the 1D boundary between the raft and the surrounding membrane is important for the membrane-associated processes. The reason is that the boundary preferentially recruits different peptides, such as HIV (human immunodeficiency virus) fusion peptide...
May 16, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29769533/structure-of-a-cleavage-independent-hiv-env-recapitulates-the-glycoprotein-architecture-of-the-native-cleaved-trimer
#6
Anita Sarkar, Shridhar Bale, Anna-Janina Behrens, Sonu Kumar, Shailendra Kumar Sharma, Natalia de Val, Jesper Pallesen, Adriana Irimia, Devan C Diwanji, Robyn L Stanfield, Andrew B Ward, Max Crispin, Richard T Wyatt, Ian A Wilson
Furin cleavage of the HIV envelope glycoprotein is an essential step for cell entry that enables formation of well-folded, native-like glycosylated trimers, releases constraints on the fusion peptide, and limits enzymatic processing of the N-glycan shield. Here, we show that a cleavage-independent, stabilized, soluble Env trimer mimic (BG505 NFL.664) exhibits a "closed-form", native-like, prefusion conformation akin to furin-cleaved Env trimers. The crystal structure of BG505 NFL.664 at 3.39 Å resolution with two potent bNAbs also identifies the full epitopes of PGV19 and PGT122 that target the receptor binding site and N332 supersite, respectively...
May 16, 2018: Nature Communications
https://www.readbyqxmd.com/read/29769349/hiv-1-activation-of-innate-immunity-depends-strongly-on-the-intracellular-level-of-trex1-and-sensing-of-incomplete-reverse-transcription-products
#7
Swati Kumar, James H Morrison, David Dingli, Eric Poeschla
TREX1 has been reported to degrade cytosolic immune-stimulatory DNA, including viral DNA generated during HIV-1 infection, but the dynamic range of its capacity to suppress innate immune stimulation is unknown and its full role in the viral life cycle remains unclear. A main purpose of our study was to determine how the intracellular level of TREX1 affects HIV-1 activation and avoidance of innate immunity. Using stable over-expression and CRISPR-mediated gene disruption, we engineered a range of TREX1 levels in human THP-1 monocytes...
May 16, 2018: Journal of Virology
https://www.readbyqxmd.com/read/29768662/immersion-in-water-during-labour-and-birth
#8
REVIEW
Elizabeth R Cluett, Ethel Burns, Anna Cuthbert
BACKGROUND: Water immersion during labour and birth is increasingly popular and is becoming widely accepted across many countries, and particularly in midwifery-led care settings. However, there are concerns around neonatal water inhalation, increased requirement for admission to neonatal intensive care unit (NICU), maternal and/or neonatal infection, and obstetric anal sphincter injuries (OASIS). This is an update of a review last published in 2011. OBJECTIVES: To assess the effects of water immersion during labour and/or birth (first, second and third stage of labour) on women and their infants...
May 16, 2018: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/29759530/emerging-glycobiology-tools-a-renaissance-in-accessibility
#9
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/29751987/unmet-mental-health-and-social-service-needs-of-formerly-incarcerated-women-living-with-hiv-in-the-deep-south
#10
David W Pantalone, Michael L Scanlon, Shelley M Brown, Bharathi Radhakrishnan, Courtenay Sprague
Due to the disproportionate burden of HIV among incarcerated women in the United States, jails and prisons have been identified as key sites for health service delivery. Recidivism remains high, potentially reflecting unmet mental health and social service needs of incarcerated women, especially during the postrelease adjustment period. However, little published research has investigated this possibility directly. We conducted semi-structured, in-depth interviews with previously incarcerated women living with HIV, and other key informants, and completed service-availability mapping in two Alabama cities...
April 18, 2018: Journal of the Association of Nurses in AIDS Care: JANAC
https://www.readbyqxmd.com/read/29746648/effects-of-sofosbuvir-based-hepatitis-c-treatment-on-the-pharmacokinetics-of-tenofovir-in-hiv-hcv-coinfected-individuals-receiving-tenofovir-disoproxil-fumarate
#11
Christine E MacBrayne, Kristen M Marks, Daniel S Fierer, Susanna Naggie, Raymond T Chung, Michael D Hughes, Arthur Y Kim, Marion G Peters, Diana M Brainard, Sharon M Seifert, Jose R Castillo-Mancilla, Lane R Bushman, Peter L Anderson, Jennifer J Kiser
Background: The nucleotide analogues tenofovir and sofosbuvir are considered to have low potential for drug interactions. Objectives: To determine the effect of sofosbuvir-based HCV treatment on plasma concentrations of tenofovir and cellular concentrations of tenofovir diphosphate. Methods: HIV-infected participants with acute HCV were treated for 12 weeks with sofosbuvir + ribavirin in Cohort 1 or 8 weeks with ledipasvir/sofosbuvir in Cohort 2 of AIDS Clinical Trials Group study 5327...
May 9, 2018: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/29745288/late-entry-to-hiv-and-aids-care-and-treatment-juba-teaching-hospital-juba-south-sudan-2013-2016
#12
Muki Johnson, Benjamin L Lemi, Hillary L Tonny, Adelina D David, Waqo Boru, James Ransom
Late diagnosis of HIV and enrolment to care are global public health challenges. This study aimed to characterise late HIV diagnoses and initiation of treatment among patients at Juba Teaching Hospital (JTH) in South Sudan. We conducted a retrospective review of lab-confirmed HIV patients at JTH, 2013-2016. Demographic, clinical, and laboratory data were entered into and descriptive statistics were calculated using Microsoft Excel. We identified 401 patients, with mean age 33.71±4.54 years, 235 (59%) were female, 307 (77%) were late entry, 64 (16%) were lost to follow-up, and 57 (14%) died within 12 months of diagnosis...
May 10, 2018: African Journal of AIDS Research: AJAR
https://www.readbyqxmd.com/read/29743377/equine-myxovirus-resistance-protein-2-restricts-lentiviral-replication-by-blocking-nuclear-uptake-of-capsid-protein
#13
Shuang Ji, Lei Na, Huiling Ren, Yujie Wang, Xiaojun Wang
Human Myxovirus resistance 2 (huMxB) has been shown to be a determinant type I interferon-induced host factor involved in the inhibition of HIV-1 as well as many other primate lentiviruses. This blocking occurs after the reverse transcription of viral RNA and ahead of the integration into the host DNA, which is closely connected to the ability of the protein to bind the viral capsid. To date, Mx2s derived from non-primate animals have shown no capacity for HIV-1 suppression. In this study, we examined the restrictive effect of equine Mx2 (eqMx2) on both the equine infectious anemia virus (EIAV) and HIV-1 and investigated possible mechanisms for its specific function...
May 9, 2018: Journal of Virology
https://www.readbyqxmd.com/read/29742434/live-imaging-of-hiv-1-transfer-across-t-cell-virological-synapse-to-epithelial-cells-that-promotes-stromal-macrophage-infection
#14
Fernando Real, Alexis Sennepin, Yonatan Ganor, Alain Schmitt, Morgane Bomsel
During sexual intercourse, HIV-1 crosses epithelial barriers composing the genital mucosa, a poorly understood feature that requires an HIV-1-infected cell vectoring efficient mucosal HIV-1 entry. Therefore, urethral mucosa comprising a polarized epithelium and a stroma composed of fibroblasts and macrophages were reconstructed in vitro. Using this system, we demonstrate by live imaging that efficient HIV-1 transmission to stromal macrophages depends on cell-mediated transfer of the virus through virological synapses formed between HIV-1-infected CD4+ T cells and the epithelial cell mucosal surface...
May 8, 2018: Cell Reports
https://www.readbyqxmd.com/read/29741638/distribution-of-hiv-rna-in-csf-and-blood-is-linked-to-cd4-cd8-ratio-during-acute-hiv
#15
Phillip Chan, Payal Patel, Joanna Hellmuth, Donn J Colby, Eugène Kroon, Carlo Sacdalan, Suteeraporn Pinyakorn, Linda Jagodzinski, Shelly Krebs, Jintanat Ananworanich, Victor Valcour, Serena Spudich
Background: HIV RNA levels in the plasma and cerebrospinal fluid (CSF) are correlated in chronic HIV infection but their dynamics have not been characterized during acute infection. Methods: This study analyzed predictors of CSF HIV RNA and relative degree of CNS viral transmigration expressed as plasma minus CSF HIV log10 RNA (PCratio) during untreated acute HIV infection. CSF immune markers were compared between groups with different PCratio. Results: 117 mostly male (97%) participants in the RV254 cohort in Bangkok, Thailand, had median age 28 years and an estimated median 18 days duration of infection; forty-three (37%) were Fiebig stages I/II...
May 7, 2018: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/29739880/ccr5-adopts-three-homodimeric-conformations-that-control-cell-surface-delivery
#16
Jun Jin, Fanny Momboisse, Gaelle Boncompain, Florian Koensgen, Zhicheng Zhou, Nelia Cordeiro, Fernando Arenzana-Seisdedos, Franck Perez, Bernard Lagane, Esther Kellenberger, Anne Brelot
Biophysical methods and x-ray crystallography have revealed that class A G protein-coupled receptors (GPCRs) can form homodimers. We combined computational approaches with receptor cross-linking, energy transfer, and a newly developed functional export assay to characterize the residues involved in the dimerization interfaces of the chemokine receptor CCR5, the major co-receptor for HIV-1 entry into cells. We provide evidence of three distinct CCR5 dimeric organizations, involving residues of transmembrane helix 5...
May 8, 2018: Science Signaling
https://www.readbyqxmd.com/read/29736270/fiv-vaccine-with-receptor-epitopes-results-in-neutralizing-antibodies-but-does-not-confer-resistance-to-challenge
#17
Craig Miller, Mauren Emanuelli, Elizabeth Fink, Esther Musselman, Ryan Mackie, Ryan Troyer, John Elder, Sue VandeWoude
Feline immunodeficiency virus (FIV) is the feline analogue to human immunodeficiency virus (HIV) and utilizes parallel modes of receptor-mediated entry. The FIV surface glycoprotein (SU) is an important target for induction of neutralizing antibodies, and autoantibodies to the FIV binding receptor (CD134) block infection ex vivo; thus highlighting the potential for immunotherapies which utilize anti-receptor antibodies to block viral infection. To determine whether vaccination with CD134-SU complexes could induce protection against FIV infection, cats ( n  = 5 per group) were immunized with soluble CD134, recombinant FIV-SU protein, and/or CD134+SU complexes...
2018: NPJ Vaccines
https://www.readbyqxmd.com/read/29723162/hiv-1-replicates-and-persists-in-vaginal-epithelial-dendritic-cells
#18
Victor Pena-Cruz, Luis M Agosto, Hisashi Akiyama, Alex Olson, Yvetane Moreau, Jean-Robert Larrieux, Andrew Henderson, Suryaram Gummuluru, Manish Sagar
HIV-1 acquisition occurs most commonly after sexual contact. To establish infection, HIV-1 must infect cells that support high level replication, namely CD4+ T cells, which are absent from the outermost genital epithelium. Dendritic cells (DCs), present in mucosal epithelia, potentially facilitate HIV-1 acquisition. We show that vaginal epithelial DCs, termed CD1a+ VEDCs, are unlike other blood and tissue derived DCs because they express langerin but not DC-SIGN, and unlike skin-based langerin+ DC subset, Langerhans cells (LC), they do not harbor Birbeck granules...
May 3, 2018: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/29722445/review-article-the-prevention-of-hepatitis-b-related-hepatocellular-carcinoma
#19
REVIEW
C-L Lin, J-H Kao
BACKGROUND: Ample evidence indicates an aetiological association of persistent hepatitis B virus (HBV) infection with hepatocellular carcinoma (HCC). Several viral, host and external risk factors for the development of HBV-related HCC have been documented. AIMS: To summarise and discuss the risk stratification and the preventive strategies of HBV-related HCC. METHODS: Recent published studies identified from PubMed were comprehensively reviewed...
May 3, 2018: Alimentary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/29720459/impact-of-an-antiretroviral-stewardship-strategy-on-medication-error-rates
#20
Katherine M Shea, Athena Lv Hobbs, Jason D Shumake, Derek J Templet, Eimeira Padilla-Tolentino, Kristin E Mondy
PURPOSE: The impact of an antiretroviral stewardship strategy on medication error rates was evaluated. METHODS: This single-center, retrospective, comparative cohort study included patients at least 18 years of age infected with human immunodeficiency virus (HIV) who were receiving antiretrovirals and admitted to the hospital. A multicomponent approach was developed and implemented and included modifications to the order-entry and verification system, pharmacist education, and a pharmacist-led antiretroviral therapy checklist...
May 2, 2018: American Journal of Health-system Pharmacy: AJHP
keyword
keyword
67515
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"