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Antiretroviral resistance

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https://www.readbyqxmd.com/read/27919899/pharmacokinetic-evaluation-of-darunavir-administered-once-or-twice-daily-in-combination-with-ritonavir-or-the-three-direct-acting-antiviral-regimen-of-ombitasvir-paritaprevir-ritonavir-and-dasabuvir-in-adults-co-infected-with-hepatitis-c-and-human-immunodeficiency
#1
Jennifer R King, Amit Khatri, Roger Trinh, Rolando M Viani, Bifeng Ding, Jiuhong Zha, Rajeev Menon
BACKGROUND: The three-direct acting antiviral (3D) regimen containing ombitasvir, paritaprevir, ritonavir and dasabuvir ± ribavirin (RBV) is approved for treatment of HCV GT1/HIV-1 co-infection. Results of a pharmacokinetic substudy of 3D and darunavir are presented. METHODS: HCV/HIV-1 infected subjects were randomized to maintain a darunavir 800 mg once daily (QD) or switch to a darunavir 600 mg twice daily (BID) based antiretroviral regimen. On Study Day 1, subjects received 3D and RBV plus darunavir for 12 weeks...
December 5, 2016: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/27918612/generalized-semiparametric-varying-coefficient-model-for-longitudinal-data-with-applications-to-adaptive-treatment-randomizations
#2
Li Qi, Yanqing Sun, Peter B Gilbert
This article investigates a generalized semiparametric varying-coefficient model for longitudinal data that can flexibly model three types of covariate effects: time-constant effects, time-varying effects, and covariate-varying effects. Different link functions can be selected to provide a rich family of models for longitudinal data. The model assumes that the time-varying effects are unspecified functions of time and the covariate-varying effects are parametric functions of an exposure variable specified up to a finite number of unknown parameters...
December 5, 2016: Biometrics
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
#3
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/27911140/effect-of-secondary-preventive-therapy-on-recurrence-of-tuberculosis-in-hiv-infected-individuals-a-systematic-review
#4
Wassilis Sc Bruins, Frank van Leth
Human immunodeficiency virus (HIV)-infected individuals successfully treated for tuberculosis (TB) remain at risk of recurrence of the disease, especially in high TB incidence settings. We performed a systematic review, investigating whether secondary preventive therapy (sPT) with anti-TB drugs (preventive therapy in former TB patients with treatment success) is an effective strategy to prevent recurrence of TB in this patient group. We searched the databases PubMed, Cochrane Library, EMBASE, Web of Science and Google Scholar using the keywords HIV-infections, HIV, human immunodeficiency virus, AIDS, isoniazid, isoniazid preventive therapy (IPT), tuberculosis, TB, recurrence and recurrent disease, resulting in 253 potential publications...
December 2, 2016: Infectious Diseases
https://www.readbyqxmd.com/read/27910750/antiretroviral-agents-looking-for-the-best-possible-chemotherapeutic-options-to-conquer-hiv
#5
Tahir Farooq, Arruje Hameed, Kanwal Rehman, Muhammad Ibrahim, Muhammad Imran Qadir, Muhammad Sajid Hamid Akash
For the last thirty years, ongoing efforts have revolutionized the antiretroviral therapy, which changed human immunodeficiency virus (HIV) infections from terrifying lethal diseases to chronic conditions. However, many challenges, like emergence of drug resistance, limited the scope of activity of currently existing anti-HIV agents. Quite often severe side effects and lifelong dependency are the major concerns of present era. All these issues have compelled the scientists to reconsider and refine the current therapies and also contemplate the pivotal priorities for the developments of novel therapeutic paradigms...
2016: Critical Reviews in Eukaryotic Gene Expression
https://www.readbyqxmd.com/read/27907076/clinical-determinants-of-hiv-1b-between-host-evolution-and-their-association-with-drug-resistance-in-pediatric-patients
#6
Israel Pagán, Patricia Rojas, José Tomás Ramos, África Holguín
Understanding the factors that modulate the evolution of virus populations is essential to design efficient control strategies. Mathematical models predict that factors affecting viral within-host evolution may also determine that at the between-host level. Although HIV-1 within-host evolution has been associated with clinical factors used to monitor AIDS progression, such as patient age, CD4 cells count, viral load, and antiretroviral experience, little is known about the role of these clinical factors in determining between-host HIV-1 evolution...
2016: PloS One
https://www.readbyqxmd.com/read/27907009/moderate-levels-of-pre-treatment-hiv-1-antiretroviral-drug-resistance-detected-in-the-first-south-african-national-survey
#7
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/27906995/assessment-of-the-world-health-organization-s-hiv-drug-resistance-early-warning-indicators-in-main-and-decentralized-outreach-antiretroviral-therapy-sites-in-namibia
#8
Nicholus Mutenda, Alexandra Bukowski, Anne-Marie Nitschke, Tuli Nakanyala, Ndapewa Hamunime, Tadesse Mekonen, Francina Tjituka, Greatjoy Mazibuko, Samson Mwinga, David Mabirizi, Evans Sagwa, Rosalia Indongo, Natalie Dean, Michael R Jordan, Steven Y Hong
BACKGROUND: The World Health Organization (WHO) early warning indicators (EWIs) of HIV drug resistance (HIVDR) assess factors at individual ART sites that are known to create situations favourable to the emergence of HIVDR. METHODS: In 2014, the Namibia HIV care and treatment program abstracted the following adult and pediatric EWIs from all public ART sites (50 main sites and 143 outreach sites): On-time pill pick-up, Retention in care, Pharmacy stock-outs, Dispensing practices, and Viral load suppression...
2016: PloS One
https://www.readbyqxmd.com/read/27906009/current-trends-and-intricacies-in-the-management-of-hiv-associated-pulmonary-tuberculosis
#9
REVIEW
Narendran Gopalan, Padmapriyadarsini Chandrasekaran, Soumya Swaminathan, Srikanth Tripathy
Human immunodeficiency virus (HIV) epidemic has undoubtedly increased the incidence of tuberculosis (TB) globally, posing a formidable global health challenge affecting 1.2 million cases. Pulmonary TB assumes utmost significance in the programmatic perspective as it is readily transmissible as well as easily diagnosable. HIV complicates every aspect of pulmonary tuberculosis from diagnosis to treatment, demanding a different approach to effectively tackle both the diseases. In order to control these converging epidemics, it is important to diagnose early, initiate appropriate therapy for both infections, prevent transmission and administer preventive therapy...
September 26, 2016: AIDS Research and Therapy
https://www.readbyqxmd.com/read/27905841/cell-delivered-entry-inhibitors-for-hiv-1-ccr5-downregulation-and-blocking-virus-membrane-fusion-in-defending-the-host-cell-population
#10
Geoff Symonds, Jeffrey S Bartlett, Hans-Peter Kiem, Marlene Tsie, Louis Breton
HIV-1 infection requires the presence of the CD4 receptor on the target cell surface and a coreceptor, predominantly CC-chemokine receptor 5 (CCR5). It has been shown that individuals who are homozygous for a defective CCR5 gene are protected from HIV-1 infection. A novel self-inactivating lentiviral vector LVsh5/C46 (Cal-1) has been engineered to block HIV-1 infection with two viral entry inhibitors, conferring resistance to HIV-1 infection from both CCR5 and CXCR4 tropic strains. Cal-1 encodes a short hairpin RNA (sh5) to downregulate CCR5 and C46, an HIV-1 fusion inhibitor...
December 2016: AIDS Patient Care and STDs
https://www.readbyqxmd.com/read/27903365/-hiv-drug-resistance-analysis-among-burmese-with-antiretroviral-treatment-in-dehong-prefecture-yunnan-province
#11
S T Yao, M Chen, Y L Li, R H Ye, J Yang, J B Wang, D D Cao, P Y Li, Y Shi, Y W Xu, W H Yang, C Y Yin, Y L Ma, S Duan
No abstract text is available yet for this article.
November 6, 2016: Zhonghua Yu Fang Yi Xue za Zhi [Chinese Journal of Preventive Medicine]
https://www.readbyqxmd.com/read/27897226/viral-and-host-characteristics-of-recent-and-established-hiv-1-infections-in-kisumu-based-on-a-multiassay-approach
#12
Newton Otecko, Seth Inzaule, Collins Odhiambo, George Otieno, Valarie Opollo, Alex Morwabe, Kennedy Were, Kenneth Ndiege, Fredrick Otieno, Andrea A Kim, Clement Zeh
Integrated approaches provide better understanding of HIV/AIDS epidemics. We optimised a multiassay algorithm (MAA) and assessed HIV incidence, correlates of recent infections, viral diversity, plus transmission clusters among participants screened for Kisumu Incidence Cohort Study (KICoS1) (2007-2009). We performed BED-CEIA, Limiting antigen (LAg) avidity, Biorad avidity, and viral load (VL) tests on HIV-positive samples. Genotypic analyses focused on HIV-1 pol gene. Correlates of testing recent by MAA were assessed using logistic regression model...
November 29, 2016: Scientific Reports
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
#13
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/27894862/hiv-drug-resistance-testing-among-patients-failing-second-line-antiretroviral-therapy-comparison-of-in-house-and-commercial-sequencing
#14
Benjamin Chimukangara, Bhavini Varyani, Tinei Shamu, Junior Mutsvangwa, Justen Manasa, Elizabeth White, Cleophas Chimbetete, Ruedi Luethy, David Katzenstein
INTRODUCTION: HIV genotyping is often unavailable in low and middle-income countries due to infrastructure requirements and cost. We compared genotype resistance testing in patients with virologic failure, by amplification of HIV pol gene, followed by "in-house" sequencing and commercial sequencing. METHODS: Remnant plasma samples from adults and children failing second-line ART were amplified and sequenced using in-house and commercial di-deoxysequencing, and analyzed in Harare, Zimbabwe and at Stanford, U...
November 25, 2016: Journal of Virological Methods
https://www.readbyqxmd.com/read/27890958/nonhealing-genital-ulcer-in-aids-a-diagnostic-dilemma
#15
Yogesh S Marfatia, Devi Sathianadha Menon, Sheethal Jose, Brijesh Kumar Patel
HIV/AIDS-related immune alteration poses many diagnostic and therapeutic challenges. HIV-positive 44-year-old male, on second-line antiretroviral therapy (ART) presented with asymptomatic non healing, well-defined, erythematous ulcer over penis since 8 months with serosanguinous discharge. Inguinal lymph nodes were not palpable. Tzanck smear was negative. Biopsy was not done as the patient was not willing for the same. Acyclovir was given considering herpes infection to which there was no response, and hence azithromycin and metronidazole were given, without improvement...
July 2016: Indian Journal of Sexually Transmitted Diseases
https://www.readbyqxmd.com/read/27890952/a-study-of-antiretroviral-resistance-patterns-in-treatment-experienced-and-naive-human-immunodeficiency-virus-infected-patients
#16
Raj Harjani, Ram Malkani
BACKGROUND: About 10% of the patients had surveillance drug-related mutations for nonnucleoside reverse transcriptase inhibitors (NNRTIs) and protease inhibitors (PIs) in an Indian study. It was also reported that resistance was maximum for nucleoside reverse transcriptase inhibitors (NRTIs) and minimum for PIs. METHODS: The present study was a cross-sectional assessment of 21 human immunodeficiency virus (HIV)-infected individuals attending a HIV care center in a tertiary care center in Mumbai, Maharashtra, India...
July 2016: Indian Journal of Sexually Transmitted Diseases
https://www.readbyqxmd.com/read/27889708/mir-34a-is-a-common-link-in-both-hiv-and-antiretroviral-therapy-induced-vascular-aging
#17
Jiaxin Zhan, Shanshan Qin, Lili Lu, Xiamin Hu, Jun Zhou, Yeying Sun, Jian Yang, Ying Liu, Zunzhe Wang, Ning Tan, Jiyan Chen, Chunxiang Zhang
Both HIV and antiretroviral therapy could induce vascular aging with unclear mechanisms. In this study, via microarray analysis, we identified, for the first time, that miR-34a expression was significantly increased in both HIV-infected, and antiretroviral agents-treated vessels and vascular endothelial cells (ECs) from these vessels. In cultured ECs, miR-34a expression was significantly increased by HIV-Tat protein and by the antiretroviral agents, lopinavir/ritonavir. Both HIV-Tat protein and antiretroviral agents could induce EC senescence, which was inhibited by miR-34a inhibition...
November 26, 2016: Aging
https://www.readbyqxmd.com/read/27882352/quantitative-evaluation-of-the-antiretroviral-efficacy-of-dolutegravir
#18
Sarah B Laskey, Robert F Siliciano
The second-generation HIV-1 integrase strand transfer inhibitor (InSTI) dolutegravir (DTG) has had a major impact on the treatment of HIV-1 infection. Here we describe important but previously undetermined pharmacodynamic parameters for DTG. We show that the dose-response curve slope, which indicates cooperativity and is a major determinant of antiviral activity, is higher for DTG than for first-generation InSTIs. This steepness does not reflect inhibition of multiple steps in the HIV-1 life cycle, as is the case for allosteric integrase inhibitors and HIV-1 protease inhibitors...
November 17, 2016: JCI Insight
https://www.readbyqxmd.com/read/27881659/glycosyl-phosphatidylinositol-gpi-anchored-anti-hiv-scfv-efficiently-protect-cd4-t-cells-from-hiv-1-infection-and-deletion-in-hu-pbl-mice
#19
Chaobaihui Ye, Weiming Wang, Liang Cheng, Guangming Li, Michael Wen, Qi Wang, Qing Zhang, Dan Li, Paul Zhou, Lishan Su
: Despite the success in viral inhibition and CD4 T cell recovery by highly active antiretroviral treatment (HAART), HIV-1 is still not curable due to the persistence of HIV-1 reservoir during treatment. One patient with acute myeloid leukemia who received allogeneic hematopoietic stem cell transplantation from homozygous CCR5 Δ32 donor has had no detectable viremia for 9 years after HAART cessation. This case has inspired a field of HIV-1 cure research focusing on engineering HIV-1 resistance of permissive cells...
November 23, 2016: Journal of Virology
https://www.readbyqxmd.com/read/27878224/potential-drug-interactions-in-patients-given-antiretroviral-therapy
#20
Wendel Mombaque Dos Santos, Silvia Regina Secoli, Stela Maris de Mello Padoin
Objective: to investigate potential drug-drug interactions (PDDI) in patients with HIV infection on antiretroviral therapy. Methods: a cross-sectional study was conducted on 161 adults with HIV infection. Clinical, socio demographic, and antiretroviral treatment data were collected. To analyze the potential drug interactions, we used the software Micromedex(r). Statistical analysis was performed by binary logistic regression, with a p-value of ≤0.05 considered statistically significant...
November 21, 2016: Revista Latino-americana de Enfermagem
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