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NNRTI HIV

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https://www.readbyqxmd.com/read/28107870/identifications-of-drug-resistance-mutations-among-antiretroviral-treatment-naive-hiv-1-patients-in-peninsular-malaysia
#1
Rozainanee Mohd Zain, Nabila Ibrahim, Suriani Ismail, Jeyanthi Suppiah, Nor Aziyah Mat Rahim, Ravindran Thayan
OBJECTIVE: To determine drug resistance mutations and the HIV-1 subtypes among antiretroviral treatment naive HIV-1 patients in Peninsular Malaysia. METHODS: A total of 45 samples from four hospitals that provide HIV viral load services were subjected to the amplification of the protease and two third of reverse transcriptase regions of the pol gene by RT-PCR and Sanger sequencing. Drug resistance mutation (DRM) interpretation reports the presence of mutations related to protease inhibitors (PIs), Nucleoside reverse-transcriptase inhibitors (NRTI) and Non-nucleoside reverse-transcriptase inhibitors (NNRTI) based on analysis using Stanford HIV database program...
January 2017: Asian Pacific Journal of Tropical Medicine
https://www.readbyqxmd.com/read/28094565/the-decline-in-hiv-1-drug-resistance-in-heavily-antiretroviral-experienced-patients-is-associated-with-optimized-prescriptions-in-a-treatment-roll-out-program-in-mexico
#2
Juan J Calva, Silvana Larrea, Marco A Tapia-Maltos, Mauricio Ostrosky-Frid, Carolina Lara, Pedro Aguilar-Salinas, Héctor Rivera, Juan P Ramírez
A decrease in the rate of acquired antiretroviral (ARV) drug-resistance (ADR) over time has been documented in high-income settings, but data on the determinants of this phenomenon are lacking. We tested the hypothesis that in heavily ARV-experienced patients in the Mexican ARV therapy (ART) roll-out program, the drop in ADR would be associated with changes in ARV drug usage. Genotypic resistance tests obtained from 974 HIV-infected patients with virologic failure and at least 2 previously failed ARV regimens from throughout the country were analyzed for the presence of nRTI, NNRTI and PI resistance-associated mutations (RAMs)...
January 17, 2017: AIDS Research and Human Retroviruses
https://www.readbyqxmd.com/read/28088884/dual-raltegravir-etravirine-combination-as-maintenance-regimen-in-virologically-suppressed-hiv-1-infected-patients
#3
Leonardo Calza, Eleonora Magistrelli, Vincenzo Colangeli, Roberto Manfredi, Marco Borderi, Nicolò Rossi, Matteo Conti, Rita Mancini, Pierluigi Viale
BACKGROUND: Nucleoside reverse transcriptase inhibitor (NRTI)- and protease inhibitor (PI)-sparing antiretroviral regimens may be useful in selected HIV-infected patients with resistance or intolerance to these drug classes. METHODS: This was an observational prospective study of patients on suppressive antiretroviral therapy containing two NRTIs plus one ritonavir-boosted PI who switched to a dual regimen containing raltegravir plus etravirine. Patients were required not to have prior virological failure to raltegravir and to have efficacy of etravirine showed through the genotypic resistance assay in case of prior non-nucleoside reverse transcriptase inhibitor (NNRTI) virological failure...
January 15, 2017: AIDS Research and Human Retroviruses
https://www.readbyqxmd.com/read/28042101/efavirenz-dissolution-enhancement-iii-colloid-milling-pharmacokinetics-and-electronic-tongue-evaluation
#4
Cristiane R D Hoffmeister, Cinira Fandaruff, Maíra A da Costa, Lucio M Cabral, Luciana R Pitta, Stanley E R Bilatto, Livia D Prado, Daniel S Corrêa, Leandro Tasso, Marcos Antônio S Silva, Helvécio V A Rocha
Efavirenz (EFV), a non-nucleoside reverse transcriptase inhibitor (NNRTI), is part of first-line therapy for the treatment of human immunodeficiency virus type 1 infection (HIV-1/AIDS). This drug shows relatively low oral absorption and bioavailability, as well as high intra- and inter-subject variability. Several studies have shown that treatment failure and adverse effects are associated with low and high EFV plasma concentrations, respectively. Some studies suggest different EFV formulations to minimize inter-patient variability and improve its solubility and dissolution; however, all of these formulations are complex, using for instance, cyclodextrins, dendrimers and polymeric nanoparticles, rendering them inviable industrially...
December 29, 2016: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28027281/virologic-response-to-first-line-efavirenz-or-nevirapine-based-anti-retroviral-therapy-in-hiv-infected-african-children
#5
Adeodata Kekitiinwa, Alexander J Szubert, Moira Spyer, Richard Katuramu, Victor Musiime, Tawanda Mhute, Sabrina Bakeera-Kitaka, Oscar Senfuma, Ann Sarah Walker, Diana M Gibb
BACKGROUND: Poorer virologic response to nevirapine vs efavirenz-based antiretroviral therapy (ART) has been reported in adult systematic reviews and pediatric studies. METHODS: We compared drug discontinuation and viral load (VL) response in ART-naïve Ugandan/Zimbabwean children ≥3 years of age initiating ART with clinician-chosen nevirapine vs efavirenz in the ARROW trial. Predictors of suppression <80, <400 and <1000 copies/ml at 36, 48 and 144 weeks were identified using multivariable logistic regression with backwards elimination (p=0...
December 23, 2016: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/28017554/trends-and-predictors-of-hiv-1-acquired-drug-resistance-in-minas-gerais-brazil-2002-2012
#6
Helena Duani, Agdemir Waleria Aleixo, Unaí Tupinambás
Several studies show that the prevalence of multidrug-resistant HIV-1 virus is declining over time. A retrospective cohort study was carried out to evaluate the trends of drug resistance in antiretroviral treatment-exposed (ART) individuals in a state of a middle-income country, Minas Gerais, southeast region of Brazil. We analyzed 2115 HIV-1 sequences from 2002 up to 2012, from 52 cities of Minas Gerais. The groups were analyzed according to the definitions: "IAS - 3 class mutations", if ≥1 drug resistance mutation from IAS 2015 list (DRM) was present in each class; "No fully susceptible drugs" as the absence of any fully susceptible drug in Stanford algorithm; and "GSS≥2", when a maximum calculated GSS (genotypic susceptibility score) was ≥2 or ≥3, counting only drugs available in Brazil and USA at given calendar years...
December 22, 2016: Brazilian Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28010730/from-antiretroviral-therapy-access-to-provision-of-third-line-regimens-evidence-of-hiv-drug-resistance-mutations-to-first-and-second-line-regimens-among-ugandan-adults
#7
Ivan Namakoola, Ivan Kasamba, Billy N Mayanja, Patrick Kazooba, Joseph Lutaakome, Fred Lyagoba, Anne A Kapaata, Pontiano Kaleebu, Paula Munderi
BACKGROUND: HIV care programs in resource-limited settings have hitherto concentrated on antiretroviral therapy (ART) access, but HIV drug resistance is emerging. In a cross-sectional study of HIV-positive adults on ART for ≥6 months enrolled into a prospective cohort in Uganda, plasma HIV RNA was measured and genotyped if ≥1000 copies/ml. Identified Drug resistance mutations (DRMs) were interpreted using the Stanford database, 2009 WHO list of DRMs and the IAS 2014 update on DRMs, and examined and tabulated by ART drug classes...
December 23, 2016: BMC Research Notes
https://www.readbyqxmd.com/read/28008980/antiretroviral-treatment-with-efavirenz-disrupts-the-blood-brain-barrier-integrity-and-increases-stroke-severity
#8
Luc Bertrand, Levi Dygert, Michal Toborek
The introduction of antiretroviral drugs (ARVd) changed the prognosis of HIV infection from a deadly disease to a chronic disease. However, even with undetectable viral loads, patients still develop a wide range of pathologies, including cerebrovascular complications and stroke. It is hypothesized that toxic side effects of ARVd may contribute to these effects. To address this notion, we evaluated the impact of several non-nucleoside reverse transcriptase inhibitors (NNRTI; Efavirenz, Etravirine, Rilpivirine and Nevirapine) on the integrity of the blood-brain barrier, and their impact on severity of stroke...
December 23, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27999070/alarming-increase-in-pretreatment-hiv-drug-resistance-in-children-living-in-sub-saharan-africa-a-systematic-review-and-meta-analysis
#9
R S Boerma, K C E Sigaloff, A S Akanmu, S Inzaule, M Boele van Hensbroek, T F Rinke de Wit, J C Calis
BACKGROUND: Children have an augmented risk of pretreatment HIV drug resistance (PDR) due to exposure to antiretroviral drugs for the prevention of mother-to-child transmission (PMTCT). Paediatric data are essential to evaluate the effectiveness of the restricted number of paediatric regimens currently available, but these data are scarce. METHODS: We conducted a systematic review of the literature on PDR in children (median age ≤12 years) in sub-Saharan Africa...
December 20, 2016: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/27999048/pre-existent-nrti-and-nnrti-resistance-impacts-on-maintenance-of-virological-suppression-in-hiv-1-infected-patients-who-switch-to-a-tenofovir-emtricitabine-rilpivirine-single-tablet-regimen
#10
D Armenia, D Di Carlo, A Calcagno, G Vendemiati, F Forbici, A Bertoli, G Berno, S Carta, F Continenza, V Fedele, R Bellagamba, S Cicalini, A Ammassari, R Libertone, M Zaccarelli, V Ghisetti, M Andreoni, F Ceccherini-Silberstein, S Bonora, G Di Perri, A Antinori, C F Perno, M M Santoro
OBJECTIVES: To evaluate the maintenance of virological suppression (VS) in antiretroviral-treated HIV-1-suppressed patients switching to a tenofovir/emtricitabine/rilpivirine (TDF/FTC/RPV) single-tablet regimen, by considering pre-existent resistance (pRes). METHODS: pRes was evaluated according to resistance on all previous plasma genotypic resistance tests. Probability and predictors of virological rebound (VR) were evaluated. RESULTS: Three hundred and nine patients were analysed; 5...
December 20, 2016: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/27997931/modeling-outcomes-of-first-line-antiretroviral-therapy-and-rate-of-cd4-counts-change-among-a-cohort-of-hiv-aids-patients-in-ethiopia-a-retrospective-cohort-study
#11
Tadesse Awoke, Alemayehu Worku, Yigzaw Kebede, Adetayo Kasim, Belay Birlie, Roel Braekers, Khangelani Zuma, Ziv Shkedy
BACKGROUND: Antiretroviral therapy has shown to be effective in reducing morbidity and mortality in patients infected with HIV for the past couples of decades. However, there remains a need to better understand the characteristics of long-term treatment outcomes in resource poor settings. The main aim of this study was to determine and compare the long-term response of patients on nevirapine and efavirenz based first line antiretroviral therapy regimen in Ethiopia. METHODS: Hospital based retrospective cohort study was conducted from January 2009 to December 2013 at University hospital located in Northwest Ethiopia...
2016: PloS One
https://www.readbyqxmd.com/read/27943261/efavirenz-or-nevirapine-in-three-drug-combination-therapy-with-two-nucleoside-or-nucleotide-reverse-transcriptase-inhibitors-for-initial-treatment-of-hiv-infection-in-antiretroviral-na%C3%A3-ve-individuals
#12
REVIEW
Lawrence Mbuagbaw, Sara Mursleen, James H Irlam, Alicen B Spaulding, George W Rutherford, Nandi Siegfried
BACKGROUND: The advent of highly active antiretroviral therapy (ART) has reduced the morbidity and mortality due to HIV infection. The World Health Organization (WHO) ART guidelines focus on three classes of antiretroviral drugs, namely nucleoside or nucleotide reverse transcriptase inhibitors (NRTI), non-nucleoside reverse transcriptase inhibitors (NNRTI) and protease inhibitors. Two of the most common medications given as first-line treatment are the NNRTIs, efavirenz (EFV) and nevirapine (NVP)...
10, 2016: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/27922055/limited-hiv-1-reactivation-in-resting-cd4-t-cells-from-aviremic-patients-under-protease-inhibitors
#13
Amit Kumar, Wasim Abbas, Sophie Bouchat, Jean-Stéphane Gatot, Sébastien Pasquereau, Kabamba Kabeya, Nathan Clumeck, Stéphane De Wit, Carine Van Lint, Georges Herbein
A latent viral reservoir that resides in resting CD4(+) T cells represents a major barrier for eradication of HIV infection. We test here the impact of HIV protease inhibitor (PI) based combination anti-retroviral therapy (cART) over nonnucleoside reverse transcriptase inhibitor (NNRTI)-based cART on HIV-1 reactivation and integration in resting CD4(+) T cells. This is a prospective cohort study of patients with chronic HIV-1 infection treated with conventional cART with an undetectable viremia. We performed a seven-year study of 47 patients with chronic HIV-infection treated with cART regimens and with undetectable plasma HIV-1 RNA levels for at least 1 year...
December 6, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27914856/occult-hiv-1-drug-resistance-to-thymidine-analogues-following-failure-of-first-line-tenofovir-combined-with-a-cytosine-analogue-and-nevirapine-or-efavirenz-in-sub-saharan-africa-a-retrospective-multi-centre-cohort-study
#14
John Gregson, Pontiano Kaleebu, Vincent C Marconi, Cloete van Vuuren, Nicaise Ndembi, Raph L Hamers, Phyllis Kanki, Christopher J Hoffmann, Shahin Lockman, Deenan Pillay, Tulio de Oliveira, Nathan Clumeck, Gillian Hunt, Bernhard Kerschberger, Robert W Shafer, Chunfu Yang, Elliot Raizes, Rami Kantor, Ravindra K Gupta
BACKGROUND: HIV-1 drug resistance to older thymidine analogue nucleoside reverse transcriptase inhibitor drugs has been identified in sub-Saharan Africa in patients with virological failure of first-line combination antiretroviral therapy (ART) containing the modern nucleoside reverse transcriptase inhibitor tenofovir. We aimed to investigate the prevalence and correlates of thymidine analogue mutations (TAM) in patients with virological failure of first-line tenofovir-containing ART...
November 30, 2016: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/27907009/moderate-levels-of-pre-treatment-hiv-1-antiretroviral-drug-resistance-detected-in-the-first-south-african-national-survey
#15
Kim Steegen, Sergio Carmona, Michelle Bronze, Maria A Papathanasopoulos, Gert van Zyl, Dominique Goedhals, William MacLeod, Ian Sanne, Wendy S Stevens
BACKGROUND: In order to assess the level of transmitted and/or pre-treatment antiretroviral drug resistance to HIV-1, the World Health Organization (WHO) recommends that regular surveys are conducted. This study's objective was to assess the frequency of HIV-1 antiretroviral drug resistance in patients initiating antiretroviral treatment (ART) in the public sector throughout South Africa. METHODS: A prospective cross-sectional survey was conducted using probability proportional to size sampling...
2016: PloS One
https://www.readbyqxmd.com/read/27906006/integrated-therapy-for-hiv-and-tuberculosis
#16
REVIEW
Weerawat Manosuthi, Surasak Wiboonchutikul, Somnuek Sungkanuparph
Tuberculosis (TB) has been the most common opportunistic infection and cause of mortality among HIV-infected patients, especially in resource-limited countries. Clinical manifestations of TB vary and depend on the degree of immunodeficiency. Sputum microscopy and culture with drug-susceptibility testing are recommended as a standard method for diagnosing active TB. TB-related mortality in HIV-infected patients is high especially during the first few months of treatment. Integrated therapy of both HIV and TB is feasible and efficient to control the diseases and yield better survival...
May 12, 2016: AIDS Research and Therapy
https://www.readbyqxmd.com/read/27905987/factors-associated-with-the-first-antiretroviral-therapy-modification-in-older-hiv-1-positive-patients
#17
Justyna D Kowalska, Joanna Kubicka, Ewa Siwak, Piotr Pulik, Ewa Firląg-Burkacka, Andrzej Horban
BACKGROUND: Rates of first antiretroviral therapy (cART) modifications are high in most observational studies. The age-related differences in treatment duration and characteristics of first cART modifications remain underinvestigated. With increasing proportion of older patients in HIV population it is important to better understand age-related treatment effects. METHODS: Patients were included into this analysis, if being cART naïve at the first visit at the clinic...
January 7, 2016: AIDS Research and Therapy
https://www.readbyqxmd.com/read/27901200/retrospective-analysis-of-the-clinical-behavior-of-oral-hairy-leukoplakia-in-215-hiv-seropositive-patients
#18
Daniela Assis do Vale, Fabiana Martins E Martins, Paulo Henrique Braz da Silva, Karem López Ortega
Oral manifestations are common findings in human immunodeficiency virus (HIV) infected patients and frequently influence the overall health. Oral hairy leukoplakia (OHL) is strongly associated with HIV infection demonstrating its relationship with the individual's immune status and progression of immunosuppression. This study aims to retrospectively evaluate OHL in HIV patients, analyzing its incidence, demographic aspects and possible changes in clinical and epidemiological profile of the disease over 17 years...
November 28, 2016: Brazilian Oral Research
https://www.readbyqxmd.com/read/27895013/frequent-cross-resistance-to-dapivirine-in-hiv-1-subtype-c-infected-individuals-on-failing-first-line-antiretroviral-therapy-in-south-africa
#19
Kerri J Penrose, Carole L Wallis, Chanson J Brumme, Kristen A Hamanishi, Kelley C Gordon, Raquel V Viana, P Richard Harrigan, John W Mellors, Urvi M Parikh
BACKGROUND: A vaginal ring containing dapivirine (DPV) has shown moderate protective efficacy against HIV-1 acquisition, but the activity of DPV against efavirenz (EFV)- and nevirapine (NVP)-resistant viruses that could be transmitted is not well-defined. We investigated DPV cross-resistance of subtype C HIV-1 from individuals on failing NVP- or EFV-containing antiretroviral therapy (ART) in South Africa (SA). METHODS: Plasma samples were obtained from individuals with >10,000 copies/mL HIV RNA and with HIV-1 containing at least one non-nucleoside reverse transcriptase (NNRTI) mutation...
November 28, 2016: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/27878300/induction-of-dna-damage-and-apoptosis-in-human-leukemia-cells-by-efavirenz
#20
Ansgar Brüning, Julia Jückstock, Bernd Kost, Panagiotis Tsikouras, Tobias Weissenbacher, Sven Mahner, Ioannis Mylonas
As part of the efforts to drug repurposing, some HIV drugs have recently been identified to exert anticancer effects. Selected nucleoside analogues of nucleosidic reverse-transcriptase inhibitors (NRTIs) have been shown to interfere with RNA transcription of HI viruses as well as with the replication of DNA in cancer cells. Non-nucleosidic reverse transcriptase inhibitors (NNRTIs) are believed to have less effects on human DNA replication and, thus, on cancer cell proliferation. Assessment of the effect of the NNRTI efavirenz in human cancer cells, however, revealed a high sensitivity of leukemia cells to this agent at pharmacologically relevant concentrations of less than 10 µg/ml...
January 2017: Oncology Reports
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