keyword
MENU ▼
Read by QxMD icon Read
search

Hiv entry

keyword
https://www.readbyqxmd.com/read/28726743/the-effect-of-n-terminal-cyclization-on-the-function-of-the-hiv-entry-inhibitor-5p12-rantes
#1
Anna F Nguyen, Megan S Schill, Mike Jian, Patricia J LiWang
Despite effective treatment for those living with Human Immunodeficiency Virus (HIV), there are still two million new infections each year. Protein-based HIV entry inhibitors, being highly effective and specific, could be used to protect people from initial infection. One of the most promising of these for clinical use is 5P12-RANTES, a variant of the chemokine RANTES/CCL5. The N-terminal amino acid of 5P12-RANTES is glutamine (Gln; called Q0), a residue that is prone to spontaneous cyclization when at the N-terminus of a protein...
July 20, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28722331/hepatitis-c-virus-and-proprotein-convertase-subtilisin-kexin-type-9-a-detrimental-interaction-to-increase-viral-infectivity-and-disrupt-lipid-metabolism
#2
REVIEW
Matteo Pirro, Vanessa Bianconi, Daniela Francisci, Elisabetta Schiaroli, Francesco Bagaglia, Amirhossein Sahebkar, Franco Baldelli
From viral binding to the hepatocyte surface to extracellular virion release, the replication cycle of the hepatitis C virus (HCV) intersects at various levels with lipid metabolism; this leads to a derangement of the lipid profile and to increased viral infectivity. Accumulating evidence supports the crucial regulatory role of proprotein convertase subtilisin/kexin type 9 (PCSK9) in lipoprotein metabolism. Notably, a complex interaction between HCV and PCSK9 has been documented. Indeed, either increased or reduced circulating PCSK9 levels have been observed in HCV patients; this discrepancy might be related to several confounders, including HCV genotype, human immunodeficiency virus (HIV) coinfection and the ambiguous HCV-mediated influence on PCSK9 transcription factors...
July 18, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28717723/cervical-abnormalities-in-south-african-women-living-with-hiv-with-high-screening-and-referral-rates
#3
Ingrid T Katz, Lisa M Butler, Tamaryn L Crankshaw, Alexi A Wright, Karen Bramhill, Dominick A Leone, Janet Giddy, Sean Mould
PURPOSE: To determine the prevalence of screening, cervical dysplasia, and malignancy on the basis of histologic diagnoses from colposcopy and large loop excision of the transformation zone among women living with HIV (WLWH) who attended an urban antiretroviral treatment (ART) clinic in KwaZulu-Natal, South Africa. MATERIALS AND METHODS: We performed a retrospective cohort study to examine a random sample of 462 WLWH during a 5-year period from 2004 to 2009. Women on ART for < 3 months were excluded...
December 2016: Journal of Global Oncology
https://www.readbyqxmd.com/read/28715160/meeting-the-who-90-target-antiretroviral-treatment-efficacy-in-poland-is-associated-with-baseline-clinical-patient-characteristics
#4
Milosz Parczewski, Ewa Siwak, Magdalena Leszczyszyn-Pynka, Iwona Cielniak, Ewa Burkacka, Piotr Pulik, Adam Witor, Karolina Muller, Ewelina Zasik, Anna Grzeszczuk, Maria Jankowska, Małgorzata Lemańska, Anita Olczak, Edyta Grąbczewska, Aleksandra Szymczak, Jacek Gąsiorowski, Bartosz Szetela, Monika Bociąga-Jasik, Paweł Skwara, Magdalena Witak-Jędra, Elżbieta Jabłonowska, Kamila Wójcik-Cichy, Juliusz Kamerys, Małgorzata Janczarek, Dagny Krankowska, Tomasz Mikuła, Katarzyna Kozieł, Dariusz Bielec, Justyna Stempkowska, Aleksandra Kocbach, Wiesława Błudzin, Andrzej Horban
INTRODUCTION: Modern combined antiretroviral therapies (cART) allow to effectively suppress HIV-1 viral load, with the 90% virologic success rate, meeting the WHO target in most clinical settings. The aim of this study was to analyse antiretroviral treatment efficacy in Poland and to identify variables associated with virologic suppression. M: ethods Cross-sectional data on 5152 (56.92% of the countrywide treated at the time-point of analysis) patients on cART for more than six months with at least one HIV-RNA measurement in 2016 were collected from 14 Polish centres...
July 17, 2017: Journal of the International AIDS Society
https://www.readbyqxmd.com/read/28713869/association-of-anisocytosis-with-markers-of-immune-activation-and-exhaustion-in-treated-hiv
#5
Sadeer G Al-Kindi, David A Zidar, Grace A McComsey, Chris T Longenecker
BACKGROUND: Treated HIV infection is associated with heightened inflammation which can contribute to increased risk of cardiovascular disease (CVD). We have previously shown that anisocytosis, as measured by red cell distribution width (RDW), is independently associated with prevalent CVD in people living with HIV (PLHIV). In this study, we sought to identify immune correlates of RDW in PLHIV receiving antiretroviral therapy. METHODS: We performed a cross-sectional and longitudinal analysis of 147 virally-suppressed PLHIV, who had LDL < 130 mg/dL and evidence of heightened inflammation, in a randomized trial of statin therapy...
2017: Pathogens & Immunity
https://www.readbyqxmd.com/read/28713388/exploiting-natural-cross-reactivity-between-human-immunodeficiency-virus-hiv-1-p17-protein-and-anti-gp41-2f5-antibody-to-induce-hiv-1-neutralizing-responses-in-vivo
#6
Bernard Verrier, Stéphane Paul, Céline Terrat, Liza Bastide, Agathe Ensinas, Capucine Phelip, Blandine Chanut, Laura Bulens-Grassigny, Fabienne Jospin, Christophe Guillon
Anti-p17 antibodies are able to neutralize human immunodeficiency virus (HIV) entry in a mouse model. In this study, we identified a region of sequence similarity between the epitopes of anti-p17 neutralizing antibodies and anti-gp41 neutralizing 2F5 antibody and verified cross-reactivity between p17 and 2F5 in vitro. The p17 sequence was modified to increase sequence identity between the p17 and 2F5 epitopes, which resulted in enhanced cross-reactivity in vitro. Immunogenicity of wild-type and modified p17 was characterized in a rabbit model...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28708811/challenges-in-translating-prep-interest-into-uptake-in-an-observational-study-of-young-black-msm
#7
Charlotte-Paige Rolle, Eli S Rosenberg, Aaron J Siegler, Travis H Sanchez, Nicole Luisi, Kevin Weiss, Scott Cutro, Carlos Del Rio, Patrick S Sullivan, Colleen F Kelley
BACKGROUND: HIV incidence among US young, black MSM (YBMSM) is high, and structural barriers (e.g. lack of health insurance) may limit access to Pre-Exposure Prophylaxis (PrEP). Research studies conducted with YBMSM must ensure access to the best available HIV prevention methods, including PrEP. METHODS: We implemented an optional, non-incentivized PrEP program in addition to standard HIV prevention services in a prospective, observational cohort of HIV-negative YBMSM in Atlanta, GA...
July 8, 2017: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/28705263/antiviral-activity-of-dual-acting-hydrocarbon-stapled-peptides-against-hiv-1-predominantly-circulating-in-china
#8
Yan Wang, Francesca Curreli, Wei Si Xu, Zhen Peng Li, De Sheng Kong, Li Ren, Kun Xue Hong, Shi Bo Jiang, Yi Ming Shao, Asim K Debnath, Li Ying Ma
OBJECTIVE: New rationally designed i,i+7-hydrocarbon-stapled peptides that target both HIV-1 assembly and entry have been shown to have antiviral activity against HIV-1 subtypes circulating in Europe and North America. Here, we aimed to evaluate the antiviral activity of these peptides against HIV-1 subtypes predominantly circulating in China. METHODS: The antiviral activity of three i,i+7-hydrocarbon-stapled peptides, NYAD-36, NYAD-67, and NYAD-66, against primary HIV-1 CRF07_BC and CRF01_AE isolates was evaluated in peripheral blood mononuclear cells (PBMCs)...
June 2017: Biomedical and Environmental Sciences: BES
https://www.readbyqxmd.com/read/28704658/fusion-stage-of-hiv-1-entry-depends-on-virus-induced-cell-surface-exposure-of-phosphatidylserine
#9
Elena Zaitseva, Eugene Zaitsev, Kamran Melikov, Anush Arakelyan, Mariana Marin, Rafael Villasmil, Leonid B Margolis, Gregory B Melikyan, Leonid V Chernomordik
HIV-1 entry into host cells starts with interactions between the viral envelope glycoprotein (Env) and cellular CD4 receptors and coreceptors. Previous work has suggested that efficient HIV entry also depends on intracellular signaling, but this remains controversial. Here we report that formation of the pre-fusion Env-CD4-coreceptor complexes triggers non-apoptotic cell surface exposure of the membrane lipid phosphatidylserine (PS). HIV-1-induced PS redistribution depends on Ca(2+) signaling triggered by Env-coreceptor interactions and involves the lipid scramblase TMEM16F...
July 12, 2017: Cell Host & Microbe
https://www.readbyqxmd.com/read/28700571/open-and-closed-structures-reveal-allostery-and-pliability-in-the-hiv-1-envelope-spike
#10
Gabriel Ozorowski, Jesper Pallesen, Natalia de Val, Dmitry Lyumkis, Christopher A Cottrell, Jonathan L Torres, Jeffrey Copps, Robyn L Stanfield, Albert Cupo, Pavel Pugach, John P Moore, Ian A Wilson, Andrew B Ward
For many enveloped viruses, binding to a receptor(s) on a host cell acts as the first step in a series of events culminating in fusion with the host cell membrane and transfer of genetic material for replication. The envelope glycoprotein (Env) trimer on the surface of HIV is responsible for receptor binding and fusion. Although Env can tolerate a high degree of mutation in five variable regions (V1-V5), and also at N-linked glycosylation sites that contribute roughly half the mass of Env, the functional sites for recognition of receptor CD4 and co-receptor CXCR4/CCR5 are conserved and essential for viral fitness...
July 12, 2017: Nature
https://www.readbyqxmd.com/read/28696261/complex-interplay-of-kinetic-factors-governs-the-synergistic-properties-of-hiv-1-entry-inhibitors
#11
Koree W Ahn, Michael J Root
The homotrimeric HIV-1 envelope glycoprotein (Env) undergoes receptor-triggered structural changes that mediate viral entry through membrane fusion. This process is inhibited by chemokine-receptor antagonists (CoRAs) that block Env-receptor interactions and by fusion inhibitors (FIs) that disrupt Env conformational transitions. Synergy between CoRAs and FIs has been attributed to a CoRA-dependent decrease in the rate of viral membrane fusion that extends the lifetime of the intermediate state targeted by FIs...
July 10, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28696029/insurance-status-and-mortality-among-patients-with-aids
#12
A W Jabs, D A Jabs, M L Van Natta, F J Palella, C L Meinert
OBJECTIVES: The aim of the study was to evaluate risk factors for mortality, including health care insurance status, among patients with AIDS in the era of modern combination antiretroviral therapy (cART). METHODS: This study was part of the prospective, multicentre, observational Longitudinal Study of the Ocular Complications of AIDS (LSOCA). Patients were classified as having private health care insurance, Medicare, Medicaid, or no insurance. Hazard ratios (HRs) for death were calculated using proportional hazards regression models and staggered entries, anchored to the AIDS diagnosis date...
July 11, 2017: HIV Medicine
https://www.readbyqxmd.com/read/28693573/a-qualitative-assessment-of-an-abstinence-oriented-therapeutic-community-for-prisoners-with-substance-use-disorders-in-kyrgyzstan
#13
Lyuba Azbel, Julia Rozanova, Ingo Michels, Frederick L Altice, Heino Stöver
BACKGROUND: Kyrgyzstan, where HIV is concentrated in prisons and driven by injection drug use, provides a prison-based methadone maintenance therapy program as well as abstinence-oriented therapeutic community based on the 12-step model called the "Clean Zone." We aimed to qualitatively assess how prisoners navigate between these treatment options to understand the persistence of the Clean Zone despite a lack of evidence to support its effectiveness in treating opioid use disorders. METHODS: We conducted an analysis of policy documents and over 60 h of participant observation in February 2016, which included focus groups with a convenience sample of 20 therapeutic community staff members, 110 prisoners across three male and one female prisons, and qualitative interviews with two former Clean Zone participants...
July 10, 2017: Harm Reduction Journal
https://www.readbyqxmd.com/read/28692531/efavirenz-decreases-etonogestrel-exposure-a-pharmacokinetic-evaluation-of-implantable-contraception-with-antiretroviral-therapy
#14
Catherine A Chappell, Mohammed Lamorde, Shadia Nakalema, Beatrice Chen, Hope Mackline, Sharon Riddler, Susan Cohn, Kristin Darin, Sharon Achilles, Kimberly Scarsi
OBJECTIVES: The primary objective of this study was to characterize the pharmacokinetics of etonogestrel (ENG) released from a contraceptive implant in Ugandan women living with HIV who were receiving efavirenz (EFV) or nevirapine (NVP)-based antiretroviral therapy (ART), compared with ART-naïve women over 24 weeks. DESIGN: Nonrandomized, parallel-group study with three arms: ART-naïve, NVP, or EFV-based ART (N = 20/group). METHODS: Sparse pharmacokinetic sampling of ENG, NVP, or EFV were performed at screening, entry, and then 1, 4, 12, and 24-week postimplant insertion...
July 7, 2017: AIDS
https://www.readbyqxmd.com/read/28688094/risk-compensation-following-medical-male-circumcision-results-from-a-1-year-prospective-cohort-study-of-young-school-going-men-in-kwazulu-natal-south-africa
#15
K Govender, G George, S Beckett, C Montague, J Frohlich
PURPOSE: This study sought to assess risk compensation following voluntary medical male circumcision of young school-going men. Risk compensation is defined as an inadvertent increase in sexual risk behaviors and a corresponding decrease in self-perceived risk for contracting HIV following the application of a risk reduction technology. METHODS: This study documented the sexual practices of circumcised (n = 485) and uncircumcised (n = 496) young men in 42 secondary schools at three time points (baseline and 6 and 12 months) in a sub-district of KwaZulu-Natal, South Africa...
July 7, 2017: International Journal of Behavioral Medicine
https://www.readbyqxmd.com/read/28688086/sequencing-the-biology-of-entry-the-retroviral-env-gene
#16
Ronald Swanstrom, William D Graham, Shuntai Zhou
The surface envelope protein of any virus is major determinant of the host cell that is infected and as a result a major determinant of viral pathogenesis. Retroviruses have a single surface protein named Env. It is a trimer of heterodimers and is responsible for binding to the host cell receptor and mediating fusion between the viral and host membranes. In this review we will discuss the history of the discovery of the avian leukosis virus (ALV) and human immunodeficiency virus type 1 (HIV-1) Env proteins and their receptor specificity, comparing the many differences but having some similarities...
July 9, 2017: Current Topics in Microbiology and Immunology
https://www.readbyqxmd.com/read/28685046/comprehensive-review-of-the-evidence-regarding-the-effectiveness-of-community-based-primary-health-care-in-improving-maternal-neonatal-and-child-health-8-summary-and-recommendations-of-the-expert-panel
#17
Robert E Black, Carl E Taylor, Shobha Arole, Abhay Bang, Zulfiqar A Bhutta, A Mushtaque R Chowdhury, Betty R Kirkwood, Nazo Kureshy, Claudio F Lanata, James F Phillips, Mary Taylor, Cesar G Victora, Zonghan Zhu, Henry B Perry
BACKGROUND: The contributions that community-based primary health care (CBPHC) and engaging with communities as valued partners can make to the improvement of maternal, neonatal and child health (MNCH) is not widely appreciated. This unfortunate reality is one of the reasons why so few priority countries failed to achieve the health-related Millennium Development Goals by 2015. This article provides a summary of a series of articles about the effectiveness of CBPHC in improving MNCH and offers recommendations from an Expert Panel for strengthening CBPHC that were formulated in 2008 and have been updated on the basis of more recent evidence...
June 2017: Journal of Global Health
https://www.readbyqxmd.com/read/28683718/rate-of-hiv-transmission-and-associated-factors-among-hiv-exposed-infants-in-selected-health-facilities-of-east-and-west-gojjam-zones-northwest-ethiopia-retrospective-cohort-study
#18
Nurilign Abebe Moges, Getachew Mullu Kassa, Dube Jara Boneya
BACKGROUND: In 2014, there were 170,000 new HIV-infected children globally. The rate of HIV transmission from mother to child in Ethiopia was 18%. Though there are a number of HIV-related studies conducted in Ethiopia, there is a scarcity of evidence on the rate of mother to child transmission. So, the aim of this study was to determine the rate of HIV transmission and associated factors among HIV-exposed infants in selected health facilities in East and West Gojjam Zones, Northwest Ethiopia...
July 6, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28683086/phosphorylation-of-the-hiv-1-capsid-by-melk-triggers-uncoating-to-promote-viral-cdna-synthesis
#19
Hiroaki Takeuchi, Hideki Saito, Takeshi Noda, Tadashi Miyamoto, Tomokazu Yoshinaga, Kazutaka Terahara, Hiroshi Ishii, Yasuko Tsunetsugu-Yokota, Shoji Yamaoka
Regulation of capsid disassembly is crucial for efficient HIV-1 cDNA synthesis after entry, yet host factors involved in this process remain largely unknown. Here, we employ genetic screening of human T-cells to identify maternal embryonic leucine zipper kinase (MELK) as a host factor required for optimal uncoating of the HIV-1 core to promote viral cDNA synthesis. Depletion of MELK inhibited HIV-1 cDNA synthesis with a concomitant delay of capsid disassembly. MELK phosphorylated Ser-149 of the capsid in the multimerized HIV-1 core, and a mutant virus carrying a phosphorylation-mimetic amino-acid substitution of Ser-149 underwent premature capsid disassembly and earlier HIV-1 cDNA synthesis, and eventually failed to enter the nucleus...
July 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28679418/transitioning-from-antenatal-surveillance-surveys-to-routine-hiv-testing-a-turning-point-in-the-mother-to-child-transmission-prevention-programme-for-hiv-surveillance-in-brazil
#20
Gerson Fernando Mendes Pereira, Meritxell Sabidó, Alessandro Caruso, Adele Schwartz Benzaken
BACKGROUND: In Brazil, due to the rapid increase in programmes for the prevention of mother-to-child transmission (PMTCT), routine programme data are widely available. The objective of this study was to assess the utility of programmatic data to replace HIV surveillance based on the antenatal care (ANC) surveillance survey (SS). METHODS: We analysed ANC SS data from 219 maternity service clinics. PMTCT variables were extracted from the ANC SS data collection form, which allowed us to capture and compare the ANC SS data and PMTCT HIV test results for each pregnant woman who completed the ANC SS...
July 5, 2017: BMC Infectious Diseases
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"