keyword
MENU ▼
Read by QxMD icon Read
search

HIV mathematical modeling

keyword
https://www.readbyqxmd.com/read/28515014/hiv-and-the-criminalisation-of-drug-use-among-people-who-inject-drugs-a-systematic-review
#1
Kora DeBeck, Tessa Cheng, Julio S Montaner, Chris Beyrer, Richard Elliott, Susan Sherman, Evan Wood, Stefan Baral
BACKGROUND: Mounting evidence suggests that laws and policies prohibiting illegal drug use could have a central role in shaping health outcomes among people who inject drugs (PWID). To date, no systematic review has characterised the influence of laws and legal frameworks prohibiting drug use on HIV prevention and treatment. METHODS: Consistent with PRISMA guidelines, we did a systematic review of peer-reviewed scientific evidence describing the association between criminalisation of drug use and HIV prevention and treatment-related outcomes among PWID...
May 12, 2017: Lancet HIV
https://www.readbyqxmd.com/read/28514278/impact-of-screening-and-art-on-anal-cancer-incidence-in-hiv-positive-men-who-have-sex-with-men-mathematical-modeling-study
#2
Nello Blaser, Barbara Bertisch, Roger D Kouyos, Alexandra Calmy, Heiner C Bucher, Matthias Cavassini, Janne Estill, Olivia Keiser, Matthias Egger
BACKGROUND: The incidence of anal cancer is high in HIV-positive men who have sex with men (MSM). We modeled the impact of screening strategies and combination antiretroviral therapy (cART) coverage on anal cancer incidence in Switzerland. METHODS: Individual-based, dynamic simulation model parameterized with Swiss HIV Cohort Study (SHCS) and literature data. We assumed all men to be HPV infected. CD4 cell count trajectories were the main predictors of anal cancer...
May 16, 2017: AIDS
https://www.readbyqxmd.com/read/28514276/sexual-network-drivers-of-hiv-and-herpes-simplex-virus-type-2-hsv-2-transmission-a-comparative-mathematical-modeling-analysis
#3
Ryosuke Omori, Laith J Abu-Raddad
OBJECTIVES: HIV and herpes simplex virus type 2 (HSV-2) infections are sexually transmitted and propagate in sexual networks. Using mathematical modeling, we aimed to quantify effects of key network statistics on infection transmission, and extent to which HSV-2 prevalence can be a proxy of HIV prevalence. DESIGN/METHODS: An individual-based simulation model was constructed to describe sex partnering and infection transmission, and was parameterized with representative natural history, transmission, and sexual behavior data...
May 16, 2017: AIDS
https://www.readbyqxmd.com/read/28512685/modeling-brain-lentiviral-infections-during-antiretroviral-therapy-in-aids
#4
Weston C Roda, Michael Y Li, Michael S Akinwumi, Eugene L Asahchop, Benjamin B Gelman, Kenneth W Witwer, Christopher Power
Understanding HIV-1 replication and latency in different reservoirs is an ongoing challenge in the care of patients with HIV/AIDS. A mathematical model was created to describe and predict the viral dynamics of HIV-1 and SIV infection within the brain during effective combination antiretroviral therapy (cART). The mathematical model was formulated based on the biology of lentiviral infection of brain macrophages and used to describe the dynamics of transmission and progression of lentiviral infection in brain...
May 16, 2017: Journal of Neurovirology
https://www.readbyqxmd.com/read/28505240/incidence-of-gonorrhea-and-chlamydia-following-hiv-preexposure-prophylaxis-among-men-who-have-sex-with-men-a-modeling-study
#5
Samuel M Jenness, Kevin M Weiss, Steven M Goodreau, Thomas Gift, Harrell Chesson, Karen W Hoover, Dawn K Smith, Albert Y Liu, Patrick S Sullivan, Eli S Rosenberg
Background: Preexposure prophylaxis (PrEP) is highly effective for preventing HIV, but risk compensation (RC) in men who have sex with men (MSM) raises concerns about increased sexually transmitted infections (STIs). CDC's PrEP guidelines recommend biannual STI screening, which may reduce incidence by treating STIs that would otherwise remain undiagnosed. We investigated the impact of these two potentially counteracting phenomena. Methods: With a stochastic network-based mathematical model of HIV and rectal/urogenital Neisseria gonorrhoeae (NG) and Chlamydia trachomatis (CT) transmission dynamics among MSM in the United States, we simulated PrEP uptake following the prescription indications and HIV/STI screening recommendations in the CDC guidelines...
May 13, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28493917/the-impact-of-hcv-therapy-in-a-high-hiv-hcv-prevalence-population-a-modeling-study-on-people-who-inject-drugs-in-ho-chi-minh-city-vietnam
#6
Ruthie B Birger, Thuy Le, Roger D Kouyos, Bryan T Grenfell, Timothy B Hallett
BACKGROUND: Human Immunodeficiency Virus (HIV) and Hepatitis C Virus (HCV) coinfection is a major global health problem especially among people who inject drugs (PWID), with significant clinical implications. Mathematical models have been used to great effect to shape HIV care, but few have been proposed for HIV/HCV. METHODS: We constructed a deterministic compartmental ODE model that incorporated layers for HIV disease progression, HCV disease progression and PWID demography...
2017: PloS One
https://www.readbyqxmd.com/read/28482004/imputing-direct-and-indirect-vaccine-effectiveness-of-childhood-pneumococcal-conjugate-vaccine-against-invasive-disease-by-surveying-temporal-changes-in-nasopharyngeal-pneumococcal-colonization
#7
Susan A Nzenze, Shabir A Madhi, Tinevimbo Shiri, Keith P Klugman, Linda de Gouveia, David P Moore, Alan S Karstaedt, Stefano Tempia, Marta C Nunes, Anne von Gottberg
The limited capabilities in most low-middle income countries to study the bebfit of pneumococcal conjugate vaccine (PCV) against invasive pneumococcal disease (IPD), calls for alternate strategies to assess this. We used a mathematical model, to predict the direct and indirect effectiveness of PCV by analyzing serotype specific colonization prevalence and IPD incidence prior to and following childhood PCV immunization in South Africa. We analyzed IPD incidence from 2005-2012 and colonization studies undertaken in HIV-uninfected and HIV-infected child-mother dyads from 2007-2009 (pre-PCV era), in 2010 (7-valent PCV era) and 2012 (13-valent PCV era)...
May 6, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28475648/hiv-1-competition-experiments-in-humanized-mice-show-that-apobec3h-imposes-selective-pressure-and-promotes-virus-adaptation
#8
Yusuke Nakano, Naoko Misawa, Guillermo Juarez-Fernandez, Miyu Moriwaki, Shinji Nakaoka, Takaaki Funo, Eri Yamada, Andrew Soper, Rokusuke Yoshikawa, Diako Ebrahimi, Yuuya Tachiki, Shingo Iwami, Reuben S Harris, Yoshio Koyanagi, Kei Sato
APOBEC3 (A3) family proteins are DNA cytosine deaminases recognized for contributing to HIV-1 restriction and mutation. Prior studies have demonstrated that A3D, A3F, and A3G enzymes elicit a robust anti-HIV-1 effect in cell cultures and in humanized mouse models. Human A3H is polymorphic and can be categorized into three phenotypes: stable, intermediate, and unstable. However, the anti-viral effect of endogenous A3H in vivo has yet to be examined. Here we utilize a hematopoietic stem cell-transplanted humanized mouse model and demonstrate that stable A3H robustly affects HIV-1 fitness in vivo...
May 5, 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28472928/using-the-multiphase-optimization-strategy-most-to-optimize-an-hiv-care-continuum-intervention-for-vulnerable-populations-a-study-protocol
#9
Marya Viorst Gwadz, Linda M Collins, Charles M Cleland, Noelle R Leonard, Leo Wilton, Monica Gandhi, R Scott Braithwaite, David C Perlman, Alexandra Kutnick, Amanda S Ritchie
BACKGROUND: More than half of persons living with HIV (PLWH) in the United States are insufficiently engaged in HIV primary care and not taking antiretroviral therapy (ART), mainly African Americans/Blacks and Hispanics. In the proposed project, a potent and innovative research methodology, the multiphase optimization strategy (MOST), will be employed to develop a highly efficacious, efficient, scalable, and cost-effective intervention to increase engagement along the HIV care continuum...
May 4, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28472445/defining-the-population-attributable-fraction-for-infectious-diseases
#10
Ellen Brooks-Pollock, Leon Danon
Background: The population attributable fraction (PAF) is used to quantify the contribution of a risk group to disease burden. For infectious diseases, high-risk individuals may increase disease risk for the wider population in addition to themselves; therefore methods are required to estimate the PAF for infectious diseases. Methods: A mathematical model of disease transmission in a population with a high-risk group was used to compare existing approaches for calculating the PAF...
May 4, 2017: International Journal of Epidemiology
https://www.readbyqxmd.com/read/28472201/predicting-hiv-1-transmission-and-antibody-neutralization-efficacy-in-vivo-from-stoichiometric-parameters
#11
Oliver F Brandenberg, Carsten Magnus, Peter Rusert, Huldrych F Günthard, Roland R Regoes, Alexandra Trkola
The potential of broadly neutralizing antibodies targeting the HIV-1 envelope trimer to prevent HIV-1 transmission has opened new avenues for therapies and vaccines. However, their implementation remains challenging and would profit from a deepened mechanistic understanding of HIV-antibody interactions and the mucosal transmission process. In this study we experimentally determined stoichiometric parameters of the HIV-1 trimer-antibody interaction, confirming that binding of one antibody is sufficient for trimer neutralization...
May 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28432579/hcv-cure-and-reinfection-among-people-with-hiv-hcv-coinfection-and-people-who-inject-drugs
#12
REVIEW
Marianne Martinello, Behzad Hajarizadeh, Jason Grebely, Gregory J Dore, Gail V Matthews
PURPOSE OF REVIEW: Highly effective, well-tolerated interferon-free direct-acting antivirals (DAA) have revolutionised hepatitis C virus (HCV) therapeutics, with the opportunity for broad treatment scale-up among marginalised or "high-risk" populations, including people who inject drugs (PWID) and people with HIV/HCV coinfection. RECENT FINDINGS: Concern that HCV reinfection may compromise HCV treatment outcomes is sometimes cited as a reason for not offering treatment to current and former PWID...
June 2017: Current HIV/AIDS Reports
https://www.readbyqxmd.com/read/28431573/a-highly-pathogenic-simian-human-immunodeficiency-virus-effectively-produces-infectious-virions-compared-with-a-less-pathogenic-virus-in-cell-culture
#13
Shoya Iwanami, Yusuke Kakizoe, Satoru Morita, Tomoyuki Miura, Shinji Nakaoka, Shingo Iwami
BACKGROUND: The host range of human immunodeficiency virus (HIV) is quite narrow. Therefore, analyzing HIV-1 pathogenesis in vivo has been limited owing to lack of appropriate animal model systems. To overcome this, chimeric simian and human immunodeficiency viruses (SHIVs) that encode HIV-1 Env and are infectious to macaques have been developed and used to investigate the pathogenicity of HIV-1 in vivo. So far, we have many SHIV strains that show different pathogenesis in macaque experiments...
April 21, 2017: Theoretical Biology & Medical Modelling
https://www.readbyqxmd.com/read/28404854/autologous-stem-cell-transplantation-disrupts-adaptive-immune-responses-during-rebound-shiv-viremia
#14
Daniel B Reeves, Christopher W Peterson, Hans-Peter Kiem, Joshua T Schiffer
Primary HIV-1 infection induces a virus-specific adaptive/cytolytic immune response that impacts plasma viral load setpoint and rate of progression to AIDS. Combination antiretroviral therapy (cART) suppresses plasma viremia to undetectable levels that rebound upon cART treatment interruption. Following cART withdrawal, the memory component of the virus-specific adaptive immune response may improve viral control compared to primary infection. Here, using primary infection and treatment interruption data from macaques infected with simian/human immunodeficiency virus (SHIV), we observe lower peak viral load but unchanged viral setpoint during viral rebound...
April 12, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28403211/the-potential-impact-and-cost-of-focusing-hiv-prevention-on-young-women-and-men-a-modeling-analysis-in-western-kenya
#15
Ramzi A Alsallaq, Jasmine Buttolph, Charles M Cleland, Timothy Hallett, Irene Inwani, Kawango Agot, Ann E Kurth
OBJECTIVE: We compared the impact and costs of HIV prevention strategies focusing on youth (15-24 year-old persons) versus on adults (15+ year-old persons), in a high-HIV burden context of a large generalized epidemic. DESIGN: Compartmental age-structured mathematical model of HIV transmission in Nyanza, Kenya. INTERVENTIONS: The interventions focused on youth were high coverage HIV testing (80% of youth), treatment at diagnosis (TasP, i.e...
2017: PloS One
https://www.readbyqxmd.com/read/28399137/the-importance-of-choice-disability-and-structural-intervention-in-the-hiv-epidemic-in-sub-saharan-africa
#16
Rebecca de Boer, Jeffrey Musgrave, Neil Andersson, Frithjof Lutscher
BACKGROUND: Despite massive investment in HIV control programs, HIV incidence rates in countries with generalized epidemics have not fallen for most of the last decade. It appears that those at risk are not adopting effective prevention strategies. Those who are unable to implement their prevention preferences are referred to as choice disabled. We examined how and to what extent structural intervention measures that support choice-disabled individuals can reduce HIV transmission and prevalence...
2017: PloS One
https://www.readbyqxmd.com/read/28358389/quantitative-analysis-of-molecular-partition-towards-lipid-membranes-using-surface-plasmon-resonance
#17
Tiago N Figueira, João M Freire, Catarina Cunha-Santos, Montserrat Heras, João Gonçalves, Anne Moscona, Matteo Porotto, Ana Salomé Veiga, Miguel A R B Castanho
Understanding the interplay between molecules and lipid membranes is fundamental when studying cellular and biotechnological phenomena. Partition between aqueous media and lipid membranes is key to the mechanism of action of many biomolecules and drugs. Quantifying membrane partition, through adequate and robust parameters, is thus essential. Surface Plasmon Resonance (SPR) is a powerful technique for studying 1:1 stoichiometric interactions but has limited application to lipid membrane partition data. We have developed and applied a novel mathematical model for SPR data treatment that enables determination of kinetic and equilibrium partition constants...
March 30, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28344385/a-dynamical-modeling-approach-for-analysis-of-longitudinal-clinical-trials-in-the-presence-of-missing-endpoints
#18
H T Banks, Shuhua Hu, Eric Rosenberg
Randomized longitudinal clinical trials are the gold standard to evaluate the effectiveness of interventions among different patient treatment groups. However, analysis of such clinical trials becomes difficult in the presence of missing data, especially in the case where the study endpoints become difficult to measure because of subject dropout rates or/and the time to discontinue the assigned interventions are different among the patient groups. Here we report on using a validated mathematical model combined with an inverse problem approach to predict the values for the missing endpoints...
January 2017: Applied Mathematics Letters
https://www.readbyqxmd.com/read/28320938/effectiveness-of-unaids-targets-and-hiv-vaccination-across-127-countries
#19
Jan Medlock, Abhishek Pandey, Alyssa S Parpia, Amber Tang, Laura A Skrip, Alison P Galvani
The HIV pandemic continues to impose enormous morbidity, mortality, and economic burdens across the globe. Simultaneously, innovations in antiretroviral therapy, diagnostic approaches, and vaccine development are providing novel tools for treatment-as-prevention and prophylaxis. We developed a mathematical model to evaluate the added benefit of an HIV vaccine in the context of goals to increase rates of diagnosis, treatment, and viral suppression in 127 countries. Under status quo interventions, we predict a median of 49 million [first and third quartiles 44M, 58M] incident cases globally from 2015 to 2035...
April 11, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28296801/accounting-for-nonsampling-error-in-estimates-of-hiv-epidemic-trends-from-antenatal-clinic-sentinel-surveillance
#20
Jeffrey W Eaton, Le Bao
OBJECTIVES: The aim of the study was to propose and demonstrate an approach to allow additional nonsampling uncertainty about HIV prevalence measured at antenatal clinic sentinel surveillance (ANC-SS) in model-based inferences about trends in HIV incidence and prevalence. DESIGN: Mathematical model fitted to surveillance data with Bayesian inference. METHODS: We introduce a variance inflation parameter (Equation is included in full-text article...
April 2017: AIDS
keyword
keyword
26406
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"