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https://www.readbyqxmd.com/read/28550375/exploring-inductive-linearization-for-pharmacokinetic-pharmacodynamic-systems-of-nonlinear-ordinary-differential-equations
#1
Chihiro Hasegawa, Stephen B Duffull
Pharmacokinetic-pharmacodynamic systems are often expressed with nonlinear ordinary differential equations (ODEs). While there are numerous methods to solve such ODEs these methods generally rely on time-stepping solutions (e.g. Runge-Kutta) which need to be matched to the characteristics of the problem at hand. The primary aim of this study was to explore the performance of an inductive approximation which iteratively converts nonlinear ODEs to linear time-varying systems which can then be solved algebraically or numerically...
May 26, 2017: Journal of Pharmacokinetics and Pharmacodynamics
https://www.readbyqxmd.com/read/28542796/interleukin-2-as-an-adjunct-to-antiretroviral-therapy-for-hiv-positive-adults
#2
REVIEW
Jennifer Onwumeh, Charles I Okwundu, Tamara Kredo
BACKGROUND: Human immunodeficiency virus (HIV) continues to be a leading cause of morbidity and mortality, particularly in sub-Saharan Africa. Although antiretroviral drugs have helped to improve the quality of life and life expectancy of HIV-positive individuals, there is still a need to explore other interventions that will help to further reduce the disease burden. One potential strategy is the use of interleukin-2 (IL-2) in combination with antiretroviral therapy (ART). IL-2 is a cytokine that regulates the proliferation and differentiation of lymphocytes and may help to boost the immune system...
May 25, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28540766/hiv-1-full-genome-phylogenetics-of-generalized-epidemics-in-sub-saharan-africa-impact-of-missing-nucleotide-characters-in-next-generation-sequences
#3
Oliver Ratmann, Chris Wymant, Caroline Colijn, Siva Danaviah, M Essex, Simon D W Frost, Astrid Gall, Simani Gaiseitsiwe, Mary Grabowski, Ronald Gray, Stephane Guindon, Arndt von Haeseler, Pontiano Kaleebu, Michelle Kendall, Alexey Kozlov, Justen Manasa, Bui Quang Minh, Sikhulile Moyo, Vladimir Novitsky, Rebecca Nsubuga, Sureshnee Pillay, Thomas C Quinn, David Serwadda, Deogratius Ssemwanga, Alexandros Stamatakis, Jana Trifinopoulos, Maria Wawer, Andrew Leigh Brown, Tulio de Oliveira, Paul Kellam, Deenan Pillay, Christophe Fraser
To characterize HIV-1 transmission dynamics in regions where the burden of HIV-1 is greatest, the 'Phylogenetics and Networks for Generalised HIV Epidemics in Africa' consortium (PANGEA-HIV) is sequencing full-genome viral isolates from across sub-Saharan Africa. We report the first 3,985 PANGEA-HIV consensus sequences from four cohort sites (Rakai Community Cohort Study, n=2,833; MRC/UVRI Uganda, n=701; Mochudi Prevention Project, n=359; Africa Health Research Institute Resistance Cohort, n=92). Next-generation sequencing success rates varied: more than 80% of the viral genome from the gag to the nef genes could be determined for all sequences from South Africa, 75% of sequences from Mochudi, 60% of sequences from MRC/UVRI Uganda, and 22% of sequences from Rakai...
May 25, 2017: AIDS Research and Human Retroviruses
https://www.readbyqxmd.com/read/28540287/it-s-a-process-reactions-to-hiv-diagnosis-and-engagement-in-hiv-care-among-high-risk-heterosexuals
#4
Alexandra H Kutnick, Marya Viorst Gwadz, Charles M Cleland, Noelle R Leonard, Robert Freeman, Amanda S Ritchie, Talaya McCright-Gill, Kathy Ha, Belkis Y Martinez
After HIV diagnosis, heterosexuals in high-poverty urban areas evidence delays in linkage to care and antiretroviral therapy initiation compared to other groups. Yet barriers to/facilitators of HIV care among these high-risk heterosexuals are understudied. Under the theory of triadic influence, putative barriers to HIV care engagement include individual/attitudinal-level (e.g., fear, medical distrust), social-level (e.g., stigma), and structural-level influences (e.g., poor access). Participants were African-American/Black and Hispanic adults found newly diagnosed with HIV (N = 25) as part of a community-based HIV testing study with heterosexuals in a high-poverty, high-HIV-incidence urban area...
2017: Frontiers in Public Health
https://www.readbyqxmd.com/read/28539448/virological-control-by-the-cd4-binding-site-antibody-n6-in-shiv-infected-rhesus-monkeys
#5
Boris Julg, Amarendra Pegu, Peter Abbink, Jinyan Liu, Amanda Brinkman, Katherine Molloy, Shanell Mojta, Abishek Chandrashekar, Katherine Callow, Keyun Wang, Xuejun Chen, Stephen D Schmidt, Jinghe Huang, Richard A Koup, Michael S Seaman, Brandon F Keele, John R Mascola, Mark Connors, Dan H Barouch
Passive immunotherapies against HIV-1 will most likely require broadly neutralizing antibodies (bnAb) with maximum breadth and potency to assure therapeutic efficacy. Recently, the novel CD4 binding site antibody N6 demonstrated extraordinary neutralization breadth and potency against large panels of cross clade pseudoviruses. We evaluated the in-vivo antiviral activity of N6-LS, alone or in combination with the established V3-glycan antibody PGT121, in chronically SHIV-SF162P3 infected macaques. A single dose of N6-LS suppressed plasma viral loads in 4 out of 5 animals at day 7 (mean 1...
May 24, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28537062/evaluation-of-the-immunogenicity-and-impact-on-the-latent-hiv-1-reservoir-of-a-conserved-region-vaccine-mva-hivconsv-in-antiretroviral-therapy-treated-subjects
#6
REVIEW
Gemma Hancock, Sara Morón-López, Jakub Kopycinski, Maria C Puertas, Eleni Giannoulatou, Annie Rose, Maria Salgado, Emma-Jo Hayton, Alison Crook, Catharine Morgan, Brian Angus, Fabian Chen, Hongbing Yang, Javier Martinez-Picado, Tomas Hanke, Lucy Dorrell
INTRODUCTION: Vaccines may be key components of a curative strategy for HIV-1. We investigated whether a novel immunogen, HIVconsv, designed to re-direct T cell responses to conserved viral epitopes, could impact the HIV-1 reservoir in chronic antiretroviral therapy (ART)-treated subjects when delivered by modified vaccinia virus Ankara (MVA). METHODS: Nineteen virologically suppressed individuals were randomized to receive vaccinations with MVA.HIVconsv (5.5 × 10(7) plaque-forming units, pfu, n = 8; 2...
May 19, 2017: Journal of the International AIDS Society
https://www.readbyqxmd.com/read/28537061/dolutegravir-lamivudine-as-initial-therapy-in-hiv-1-infected-arv-naive-patients-48-week-results-of-the-paddle-pilot-antiretroviral-design-with-dolutegravir-lamivudine-study
#7
Pedro Cahn, María José Rolón, María Inés Figueroa, Ana Gun, Patricia Patterson, Omar Sued
INTRODUCTION: A proof-of-concept study was designed to evaluate the antiviral efficacy, safety and tolerability of a two-drug regimen with dolutegravir 50 mg once daily (QD) plus lamivudine 300 mg once daily as initial highly active antiretroviral therapy (HAART) among antiretroviral (ARV)-naive patients. METHODS: PADDLE is a pilot study including 20 treatment-naive adults. To be selected, participants had no IAS-USA-defined resistance, HIV-1 RNA ≤100,000 copies/mL at screening and negative HBsAg...
May 9, 2017: Journal of the International AIDS Society
https://www.readbyqxmd.com/read/28536741/does-diagnosis-make-a-difference-estimating-the-impact-of-an-hiv-medication-adherence-intervention-for-persons-with-serious-mental-illness
#8
Natasha Dalseth, Regina Szucs Reed, Michael Hennessy, Marlene M Eisenberg, Michael B Blank
The heightened risk of persons with serious mental illness to contract and transmit human immunodeficiency virus (HIV) is a public health problem. Here we evaluate the interaction between psychiatric diagnosis and response to a community based-intervention targeted at treatment adherence in 236 HIV+ persons with co-occurring mental illness. To examine differential effectiveness of the intervention for categories of patient diagnosis, we reanalyzed the data after stratifying participants into two diagnostic groups: (1) participants with depressive disorders without psychosis and (2) participants with a psychotic or bipolar disorder...
May 23, 2017: AIDS and Behavior
https://www.readbyqxmd.com/read/28536264/exosomes-from-uninfected-cells-activate-transcription-of-latent-hiv-1
#9
Robert A Barclay, Angela Schwab, Catherine DeMarino, Yao Akpamagbo, Benjamin Lepene, Seble Kassaye, Sergey Iordanskiy, Fatah Kashanchi
HIV-1 infection causes AIDS, infecting millions worldwide. The virus can persist in a state of chronic infection due to its ability to become latent. We have previously shown a link between HIV-1 infection and exosome production. Specifically, we have reported that exosomes transport viral proteins and RNA from infected cells to neighboring uninfected cells. These viral products could then elicit an innate immune response, leading to activation of the Toll-like receptor (TLR) and NF-κB pathways. In this study, we asked whether exosomes from uninfected cells could activate latent HIV-1 in infected cells...
May 23, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28535768/parent-offspring-regression-to-estimate-the-heritability-of-an-hiv-1-trait-in-a-realistic-setup
#10
Nadine Bachmann, Teja Turk, Claus Kadelka, Alex Marzel, Mohaned Shilaih, Jürg Böni, Vincent Aubert, Thomas Klimkait, Gabriel E Leventhal, Huldrych F Günthard, Roger Kouyos
BACKGROUND: Parent-offspring (PO) regression is a central tool to determine the heritability of phenotypic traits; i.e., the relative extent to which those traits are controlled by genetic factors. The applicability of PO regression to viral traits is unclear because the direction of viral transmission-who is the donor (parent) and who is the recipient (offspring)-is typically unknown and viral phylogenies are sparsely sampled. METHODS: We assessed the applicability of PO regression in a realistic setting using Ornstein-Uhlenbeck simulated data on phylogenies built from 11,442 Swiss HIV Cohort Study (SHCS) partial pol sequences and set-point viral load (SPVL) data from 3293 patients...
May 23, 2017: Retrovirology
https://www.readbyqxmd.com/read/28535397/quality-of-life-anxiety-and-depression-in-patients-with-hiv-aids-who-present-poor-adherence-to-antiretroviral-therapy-a-cross-sectional-study-in-salvador-brazil
#11
Mónica Narváez Betancur, Liliane Lins, Irismar Reis de Oliveira, Carlos Brites
The introduction of highly active antiretroviral therapy marked a major gain in efficacy of HIV/AIDS treatment and a reduction in morbidity and mortality of the infected patients. However, high levels of adherence are required to obtain virologic suppression. In Brazil, the policy of free and universal access to antiretroviral therapy has been in place since 1996, although there are reports of poor adherence. OBJECTIVE: To define the clinical, demographic and psychological characteristics, and quality of life of patients with HIV/AIDS who present poor adherence to highly active antiretroviral therapy...
May 20, 2017: Brazilian Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28535179/reduced-frequency-of-cells-latently-infected-with-replication-competent-hiv-1-in-virally-suppressed-individuals-living-in-rakai-uganda
#12
Jessica L Prodger, Jun Lai, Steven J Reynolds, Jeanne C Keruly, Richard D Moore, Jingo Kasule, Taddeo Kityamuweesi, Paul Buule, David Serwadda, Martha Nason, Adam A Capoferri, Stephen F Porcella, Robert F Siliciano, Andrew D Redd, Janet D Siliciano, Thomas C Quinn
Background: HIV-1 persists in latently infected resting CD4+ T cells (rCD4), posing a major barrier to curing HIV-1 infection. Previous studies have quantified this pool of latently infected cells in Americans; however, no study has quantified this reservoir in sub-Saharan Africans, who make up the largest population of HIV-1-infected individuals globally. Methods: Peripheral blood was collected from 70 virally suppressed HIV-1-infected individuals from Rakai District, Uganda, who had initiated antiretroviral therapy (ART) during chronic infection...
May 23, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28534886/a-new-hiv-paradigm-dual-antiretroviral-regimens-as-maintenance-therapy
#13
Vicente Soriano, José M Peña
Since the advent of triple combination antiretroviral therapy in 1996, the prognosis of HIV-infected persons has improved drastically. The clinical benefits of HAART derive from producing sustained viral load suppression and CD4 gains. The major drawbacks of the first HAART regimens were common adverse events and high pill burden, which resulted in difficult drug adherence and led to frequent discontinuations and selection of drug resistance.
May 23, 2017: AIDS Reviews
https://www.readbyqxmd.com/read/28534541/-effectiveness-of-second-generation-direct-acting-antivirals-in-chronic-hepatitis-c
#14
R Juanbeltz Zurbano, J M Zozaya Urmeneta, J Repáraz Padrós, J Castilla Catalán, M T Sarobe Carricas, J I Úriz-Otano, M Gracia Ruiz de Alda, R San Miguel Elcano
BACKGROUND: Second-generation direct-acting antivirals (DAA) have shown high sustained virologic response (SVR) for the treatment of chronic hepatitis C in clinical trials. The objective of this study is to estimate DAA effectiveness in treatment of this disease. METHODS: Hepatitis C virus (HCV) monoinfected patients and HCV-human immunodeficiency virus (HIV) coinfected pa-tients who started interferon-free DAA based regimens during 2015 were included. The primary effectiveness outcome was SVR, defined as an undetectable viral load 12 weeks after the end of treatment...
April 30, 2017: Anales del Sistema Sanitario de Navarra
https://www.readbyqxmd.com/read/28534034/clinical-and-mucosal-immune-correlates-of-hiv-1-semen-levels-in-antiretroviral-naive-men
#15
Brendan J W Osborne, Angie K Marsh, Sanja Huibner, Kamnoosh Shahabi, Cindy Liu, Tania Contente, Nico J D Nagelkerke, Colin Kovacs, Erika Benko, Lance Price, Kelly S MacDonald, Rupert Kaul
BACKGROUND: This study was done to characterize parameters associated with semen human immunodeficiency virus (HIV)-1 ribonucleic acid (RNA) viral load (VL) variability in HIV-infected, therapy-naive men. METHODS: Paired blood and semen samples were collected from 30 HIV-infected, therapy-naive men who have sex with men, and 13 participants were observed longitudinally for up to 1 year. Human immunodeficiency virus RNA, bacterial load by 16S RNA, herpesvirus (Epstein-Barr virus and cytomegalovirus [CMV]) shedding, and semen cytokines/chemokines were quantified, and semen T-cell subsets were assessed by multiparameter flow cytometry...
2017: Open Forum Infectious Diseases
https://www.readbyqxmd.com/read/28534032/cooking-fuel-and-respiratory-symptoms-among-people-living-with-hiv-in-rural-uganda
#16
Crystal M North, Linda Valeri, Peter W Hunt, A Rain Mocello, Jeffrey N Martin, Yap Boum, Jessica E Haberer, David R Bangsberg, David C Christiani, Mark J Siedner
Household air pollution (HAP) and chronic HIV infection are each associated with significant respiratory morbidity. Little is known about relationships between HAP and respiratory symptoms among people living with HIV. The objective of this study was to investigate the relationship between cooking fuel type and chronic respiratory symptoms in study participants from the Uganda AIDS Rural Treatment Outcomes Study. Study participants were enrolled at the time of antiretroviral therapy initiation and seen quarterly from 2005 to 2014 for health-focused questionnaires, CD4 count and HIV viral load...
April 2017: ERJ Open Research
https://www.readbyqxmd.com/read/28533305/changes-in-cardiovascular-disease-risk-factors-with-immediate-versus-deferred-antiretroviral-therapy-initiation-among-hiv-positive-participants-in-the-start-strategic-timing-of-antiretroviral-treatment-trial
#17
Jason V Baker, Shweta Sharma, Amit C Achhra, Jose Ignacio Bernardino, Johannes R Bogner, Daniel Duprez, Sean Emery, Brian Gazzard, Jonathan Gordin, Greg Grandits, Andrew N Phillips, Siegfried Schwarze, Elsayed Z Soliman, Stephen A Spector, Giuseppe Tambussi, Jens Lundgren
INTRODUCTION: HIV infection and certain antiretroviral therapy (ART) medications increase atherosclerotic cardiovascular disease risk, mediated, in part, through traditional cardiovascular disease risk factors. METHODS AND RESULTS: We studied cardiovascular disease risk factor changes in the START (Strategic Timing of Antiretroviral Treatment) trial, a randomized study of immediate versus deferred ART initiation among HIV-positive persons with CD4(+) cell counts >500 cells/mm(3)...
May 22, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28532596/costs-and-cost-efficacy-analysis-of-the-2017-gesida-spanish-national-aids-plan-recommended-guidelines-for-initial-antiretroviral-therapy-in-hiv-infected-adults
#18
Antonio Rivero, José Antonio Pérez-Molina, Antonio Javier Blasco, José Ramón Arribas, Víctor Asensi, Manuel Crespo, Pere Domingo, José Antonio Iribarren, Pablo Lázaro, José López-Aldeguer, Fernando Lozano, Esteban Martínez, Santiago Moreno, Rosario Palacios, Juan Antonio Pineda, Federico Pulido, Rafael Rubio, Jesús Santos, Javier de la Torre, Montserrat Tuset, Josep M Gatell
INTRODUCTION: GESIDA and the Spanish National AIDS Plan panel of experts have recommended preferred (PR), alternative (AR) and other regimens (OR) for antiretroviral therapy (ART) as initial therapy in HIV-infected patients for 2017. The objective of this study was to evaluate the costs and the efficiency of initiating treatment with PR and AR. METHODS: Economic assessment of costs and efficiency (cost-efficacy) based on decision tree analyses. Efficacy was defined as the probability of reporting a viral load <50copies/mL at week 48, in an intention-to-treat analysis...
May 19, 2017: Enfermedades Infecciosas y Microbiología Clínica
https://www.readbyqxmd.com/read/28532195/vertical-mother-to-child-hiv-transmission-in-babies-born-in-a-tertiary-hospital-in-southern-brazil
#19
Manoela Muller Barbieri, Renate von Linsingen, Renato Luiz Sbalqueiro, Edson Gomes Tristão
PURPOSE: Programs for the elimination of mother-to-child transmission of human immunodeficiency virus (HIV) are essentially focused on prevention actions that occur during prenatal care. This study aimed to evaluate the mother-to-child vertical transmission (MCVT) rate, and identify its possible causes, in a sample of pregnant women with HIV. MATERIALS AND METHODS: This was a retrospective and descriptive study. The sample was composed of HIV-positive pregnant women who delivered a live infant in the maternity ward at the hospital of the Federal University of Parana in Brazil, between January 2007 and December 2012...
May 22, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28532134/assessing-the-efficacy-of-second-line-antiretroviral-treatment-for-hiv-patients-failing-first-line-antiretroviral-therapy-in-iran-a-cohort-study
#20
Mehrnaz Rasooli-Nejad, Maryam Khazaee-Pool, Ladan Abbasian, Zahra Bayat Jozani, Sara Ahsani-Nasab, Banafsheh Moradmand Badie, Afsaneh Pargar, Gholamreza Esmaeeli Djavid
There are limited documents about HIV patients switched to second-line antiretroviral therapy (ART) in resource-limited countries. We aimed to assess the efficacy of second-line ART for HIV patients following first-line ART failure. This was a cohort study of HIV/AIDS patients with first-line ART treatment failure switched to second-line ART between January 2004 and March 2014, who followed for at least 12 months after switching. Fifty of studied patients (85%) were treated with regimens containing lopinavir/ritonavir (Kaletra) and nine of them (15%) treated with other regimes...
April 2017: Acta Medica Iranica
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