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https://www.readbyqxmd.com/read/28520611/treatment-outcomes-of-third-line-antiretroviral-regimens-in-hiv-infected-thai-adolescents
#1
Wasana Prasitsuebsai, Jiratchaya Sophonphan, Kulkanya Chokephaibulkit, Jurai Wongsawat, Suparat Kanjanavanit, Pope Kosalaraksa, Chaiwat Ngampiyakul, Pakarat Sangkla, Rawiwan Hansudewechakul, Stephen J Kerr, Thanyawee Puthanakit, Jintanat Ananworanich
BACKGROUND: Efficacy and safety data of third-line antiretroviral (ARV) regimens in adolescents are limited. METHODOLOGY: This study enrolled HIV-infected Thais who were treated with third-line regimens consisting of darunavir/ritonavir (DRV/r), etravirine (ETR), tipranavir/ritonavir (TPV/r) or raltegravir (RAL). RESULTS: Fifty-four adolescents 2-17 years of age were enrolled from 8 sites and followed for 48 weeks. Reasons for switch were second-line failure (n=44) and toxicity to second-line regimens (n=10)...
May 16, 2017: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/28473532/novel-androgen-receptor-co-regulator-grhl2-exerts-both-oncogenic-and-anti-metastatic-functions-in-prostate-cancer
#2
Steve Paltoglou, Rajdeep Das, Scott L Townley, Theresa Hickey, Gerard Tarulli, Isabel Coutinho, Rayzel C Fernandes, Adrienne Hanson, Iza Denis, Jason Carroll, Scott M Dehm, Ganesh V Raj, Steve Plymate, Wayne D Tilley, Luke A Selth
Alterations to the expression and activity of androgen receptor (AR) co-regulators in prostate cancer is an important mechanism driving disease progression and therapy resistance. Using a novel proteomic technique, we identified a new AR co-regulator, the transcription factor Grainyhead-like 2 (GRHL2), and demonstrated its essential role in the oncogenic AR signaling axis. GRHL2 colocalized with AR in prostate tumors and was frequently amplified and upregulated in prostate cancer. Importantly, GRHL2 maintained AR expression in multiple prostate cancer model systems, was required for cell proliferation, enhanced AR's transcriptional activity, and co-located with AR at specific sites on chromatin to regulate genes relevant to disease progression...
May 4, 2017: Cancer Research
https://www.readbyqxmd.com/read/28468637/drug-transporter-mediated-interactions-between-anthelminthic-and-antiretroviral-drugs-across-the-caco-2-cell-monolayers
#3
Gabriel Kigen, Geoffrey Edwards
BACKGROUND: Drug interactions between antiretroviral drugs (ARVs) and anthelminthic drugs, ivermectin (IVM) and praziquantel (PZQ) were assessed by investigating their permeation through the Caco-2 cell monolayers in a transwell. The impact of anthelminthics on the transport of ARVs was determined by assessing the apical to basolateral (AP → BL) [passive] and basolateral to apical (BL → AP) [efflux] directions alone, and in presence of an anthelminthic. The reverse was conducted for the assessment of the influence of ARVs on anthelminthics...
May 4, 2017: BMC Pharmacology & Toxicology
https://www.readbyqxmd.com/read/28453240/virological-response-and-resistances-over-12-months-among-hiv-infected-children-less-than-two-years-receiving-first-line-lopinavir-ritonavir-based-antiretroviral-therapy-in-cote-d-ivoire-and-burkina-faso-the-monod-anrs-12206-cohort
#4
Clarisse Amani-Bosse, Désiré Lucien Dahourou, Karen Malateste, Madeleine Amorissani-Folquet, Malik Coulibaly, Sophie Dattez, Arlette Emieme, Mamadou Barry, Christine Rouzioux, Sylvie N'gbeche, Caroline Yonaba, Marguerite Timité-Konan, Véronique Mea, Sylvie Ouédraogo, Stéphane Blanche, Nicolas Meda, Carole Seguin-Devaux, Valériane Leroy
INTRODUCTION: Lopinavir/ritonavir-based antiretroviral therapy (ART) is recommended for all HIV-infected children less than three years. However, little is known about its field implementation and effectiveness in West Africa. We assessed the 12-month response to lopinavir/ritonavir-based antiretroviral therapy in a cohort of West African children treated before the age of two years. METHODS: HIV-1-infected, ART-naive except for a prevention of mother-to-child transmission (PMTCT), tuberculosis-free, and less than two years of age children with parent's consent were enrolled in a 12-month prospective therapeutic cohort with lopinavir/ritonavir ART and cotrimoxazole prophylaxis in Ouagadougou and Abidjan...
April 25, 2017: Journal of the International AIDS Society
https://www.readbyqxmd.com/read/28448537/mapping-of-quantitative-trait-loci-associated-with-resistance-to-net-form-net-blotch-pyrenophora-teres-f-teres-in-a-doubled-haploid-norwegian-barley-population
#5
Ronja Wonneberger, Andrea Ficke, Morten Lillemo
Barley net blotch caused by the necrotrophic fungus Pyrenophora teres is a major barley disease in Norway. It can cause grain shriveling and yield losses, and resistance in currently grown cultivars is insufficient. In this study, a set of 589 polymorphic SNP markers was used to map resistance loci in a population of 109 doubled haploid lines from a cross between the closely related Norwegian cultivars Arve (moderately susceptible) and Lavrans (moderately resistant). Resistance to three net form net blotch (P...
2017: PloS One
https://www.readbyqxmd.com/read/28438932/evaluation-of-a-multi-drug-assay-for-monitoring-adherence-to-a-regimen-for-hiv-pre-exposure-prophylaxis-in-a-clinical-study-hiv-prevention-trials-network-073
#6
Yinfeng Zhang, William Clarke, Mark A Marzinke, Estelle Piwowar-Manning, Geetha Beauchamp, Autumn Breaud, Craig W Hendrix, Gavin A Cloherty, Lynda Emel, Scott Rose, Lisa Hightow-Weidman, Marc Siegel, Steven Shoptaw, Sheldon D Fields, Darrell Wheeler, Susan H Eshleman
Daily oral tenofovir disoproxil fumarate/emtricitabine (TDF/FTC) is a safe and effective intervention for HIV pre-exposure prophylaxis (PrEP). We evaluated the performance of a qualitative assay that detects 20 antiretroviral (ARV) drugs for assessing recent PrEP exposure (multi-drug assay; detection limit: 2-20 ng/mL). Samples were obtained from 216 Black men who have sex with men in the United States who were enrolled in a study evaluating acceptability of tenofovir disoproxil fumarate/emtricitabine (TDF/FTC) PrEP (208 HIV-uninfected men and eight seroconverters; 165 of the uninfected men and five of the seroconverters accepted PrEP)...
April 24, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28422610/joint-bent-cable-tobit-models-for-longitudinal-and-time-to-event-data
#7
Getachew A Dagne
In this article, we show how to estimate a transition period for the evolvement of drug resistance to antiretroviral (ARV) drug or other related treatments in the framework of developing a Bayesian method for jointly analyzing time-to-event and longitudinal data. For HIV/AIDS longitudinal data, developmental trajectories of viral loads tend to show a gradual change from a declining trend after initiation of treatment to an increasing trend without an abrupt change. Such characteristics of trajectories are also associated with a time-to-event process...
April 19, 2017: Journal of Biopharmaceutical Statistics
https://www.readbyqxmd.com/read/28403027/candidates-for-inclusion-in-a-universal-antiretroviral-regimen-tenofovir-alafenamide
#8
Dzintars Gotham, Andrew Hill, Anton L Pozniak
PURPOSE OF REVIEW: Tenofovir disoproxil fumarate (TDF) is a standard first-line therapy for HIV. Recently, tenofovir alafenamide (TAF), a different prodrug for the same active moiety, has been approved. In this review, we have conducted a meta-analysis comparing efficacy and safety data for TDF and TAF, to inform a discussion of which drug would be best for a proposed 'universal antiretroviral (ARV) regimen'. RECENT FINDINGS: We identified 10 randomized controlled trials comparing TDF with TAF (6969 patients, 8043 patient-years of follow-up)...
April 11, 2017: Current Opinion in HIV and AIDS
https://www.readbyqxmd.com/read/28380417/prospects-of-estrogen-receptor-%C3%AE-activation-in-the-treatment-of-castration-resistant-prostate-cancer
#9
Julia Gehrig, Silke Kaulfuß, Hubertus Jarry, Felix Bremmer, Mark Stettner, Peter Burfeind, Paul Thelen
Advanced prostate cancer can develop into castration-resistant prostate cancer (CRPC). This process is mediated either by intratumoral ligand synthesis or by mutations or aberrations of the androgen receptor (AR) or its cofactors. To date, no curative therapy for CRPC is available, as AR-targeted therapies eventually result in the development of resistance. The human prostate cancer cell line VCaP (vertebral cancer of the prostate) overexpresses AR and its splice variants (ARVs) as a mechanism of resistance to androgen-deprivation therapy (ADT) of external and intratumoral origin...
March 23, 2017: Oncotarget
https://www.readbyqxmd.com/read/28376825/antiretroviral-therapy-supply-chain-quality-control-and-assurance-in-improving-people-living-with-hiv-therapeutic-outcomes-in-cameroon
#10
M P Ngogang Djobet, David Singhe, Julienne Lohoue, Christopher Kuaban, Jeanne Ngogang, Ernest Tambo
BACKGROUND: Evaluation of medication efficacy and safety is an essential guarantee to successful therapeutic outcome in public health practices. However, larger distribution chain supply in developing countries such as Cameroon is often challenged by counterfeit drugs, poor manufacturing, storage and degradation leading to health and patient adverse consequences. Yet, access to supply chain management in strengthening ARVs quality assurance and outcomes remains poorly documented. More than 53,000 patients have been enrolled on free ARVs medications, but little is documented on quality assurance and validity of safety for affected populations along the supply chain management since 2008...
April 4, 2017: AIDS Research and Therapy
https://www.readbyqxmd.com/read/28375551/phenotypic-characterization-of-regulatory-t-cells-from-antiretroviral-na%C3%A3-ve-hiv-1-infected-people
#11
Georgia N Ambada, Claudine E Ntsama, Nadesh N Nji, Loveline N Ngu, Sake N Carole, Abel Lissom, Flaurent T Tchouangeu, Jules Tchadji, Martin Sosso, François-Xavier Etoa, Godwin W Nchinda
Regulatory T cells (Tregs) play a key role in dampening excessive immune activation. However antiretroviral (ARV) naive HIV-1 infection maintains the immune system in a sustained state of activation that could alter both Tregs surface markers and functions. Since Tregs surface markers are directly linked to their functions the overall objective of this study was to determine how ARV naïve HIV infection affects the phenotypic properties of Tregs. Our data showed that in ARV naive HIV-1 infection, Tregs are dominated by effector (CD45RA(+) CD27(-) CCR7(-) CD62L(-) ) and effector memory (CD45RA(-) CD27(-) CCR7(-) CD62L(-) ) cells...
April 4, 2017: Immunology
https://www.readbyqxmd.com/read/28351158/stressful-and-traumatic-life-events-as-disruptors-to-antiretroviral-therapy-adherence
#12
Julie K O'Donnell, Bradley N Gaynes, Stephen R Cole, Andrew Edmonds, Nathan M Thielman, E Byrd Quinlivan, Amy Heine, Rhiddi Modi, Brian W Pence
Stressful and traumatic life events (STLEs) are common among HIV-infected individuals and may affect health behaviors such as adherence to antiretroviral (ARV) therapy, with important implications for treatment outcomes. We examined the association between STLEs and ARV adherence among 289 US-based participants enrolled between 7/1/2010 and 9/1/2013 in a study of depression treatment for HIV-infected patients. Participants received monthly telephone calls to assess STLEs and pill count-based ARV adherence. Inverse probability of observation weighting was combined with multiple imputation to address missing data...
March 28, 2017: AIDS Care
https://www.readbyqxmd.com/read/28329343/commonly-transmitted-hiv-1-drug-resistance-mutations-in-reverse-transcriptase-and-protease-in-antiretroviral-treatment-na%C3%A3-ve-patients-do-not-affect-response-to-tenofovir-disoproxil-fumarate-or-tenofovir-alafenamide-containing-regimens
#13
Nicolas A Margot, Pamela Wong, Rima Kulkarni, Kirsten White, Danielle Porter, Michael E Abram, Christian Callebaut, Michael D Miller
Background.: The presence of transmitted drug-resistance mutations (TDRM) in antiretroviral (ARV) treatment-naïve patients can adversely affect the outcome of ARV therapy. Methods.: Resistance testing was conducted in 6704 ARV-naïve subjects predominantly from the U.S. and Europe in 9 Gilead clinical studies from 2000 to 2013. Results.: The presence of TDRM increased during this period (5.2% to 11.4%), primarily driven by non-nucleoside RT inhibitor resistance mutations (NNRTI; 0...
January 30, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28328548/characterization-of-hiv-seroconverters-in-a-tdf-ftc-prep-study-hptn-067-adapt
#14
Mariya V Sivay, Maoji Li, Estelle Piwowar-Manning, Yinfeng Zhang, Sarah E Hudelson, Mark A Marzinke, Rivet K Amico, Andrew Redd, Craig W Hendrix, Peter L Anderson, Kevin Bokoch, Linda Gail-Bekker, Frits van Griensven, Sharon Mannheimer, James P Hughes, Robert Grant, Susan H Eshleman
BACKGROUND: HPTN 067/ADAPT evaluated tenofovir disoproxil fumarate/emtricitabine (TDF/FTC) pre-exposure prophylaxis (PrEP) in women (South Africa) and men who have sex with men (Thailand, US). Participants received once-weekly directly observed TDF/FTC (DOT), and were then randomized to daily, time-driven, or event-driven PrEP. This report describes characterization of 12 HIV seroconversion events in this trial. METHODS: HIV rapid testing was performed at study sites...
March 22, 2017: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/28302065/lamivudine-dolutegravir-dual-therapy-in-hiv-infected-virologically-suppressed-patients
#15
Franco Maggiolo, Roberto Gulminetti, Layla Pagnucco, Margherita Digaetano, Simone Benatti, Daniela Valenti, Annapaola Callegaro, Diego Ripamonti, Cristina Mussini
BACKGROUND: Little is known about the applicability of dual treatments based on integrase inhibitors. We explored the combination of lamivudine + dolutegravir as an option when switching from standard cART in virologically suppressed patients. METHODS: In this prospective cohort we enrolled patients previously switched to 3TC + DTG who were 18 years or older, with no previous resistance mutations to the used drugs, having a HIV-RNA <50 copies/ml for 6 months or longer, negative for HBsAg and on a stable (>6 months) cART...
March 16, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28235766/sigma1-targeting-to-suppress-aberrant-androgen-receptor-signaling-in-prostate-cancer
#16
Jeffrey D Thomas, Charles G Longen, Halley M Oyer, Nan Chen, Christina M Maher, Joseph M Salvino, Blase Kania, Kelsey N Anderson, William F Ostrander, Karen E Knudsen, Felix J Kim
Suppression of androgen receptor (AR) activity in prostate cancer by androgen depletion or direct AR antagonist treatment, although initially effective, leads to incurable castration-resistant prostate cancer (CRPC) via compensatory mechanisms including resurgence of AR and AR splice variant (ARV) signaling. Emerging evidence suggests that Sigma1 (also known as sigma-1 receptor) is a unique chaperone or scaffolding protein that contributes to cellular protein homeostasis. We reported previously that some Sigma1-selective small molecules can be used to pharmacologically modulate protein homeostasis pathways...
May 1, 2017: Cancer Research
https://www.readbyqxmd.com/read/28178281/surveillance-of-hiv-1-pol-transmitted-drug-resistance-in-acutely-and-recently-infected-antiretroviral-drug-na%C3%A3-ve-persons-in-rural-western-kenya
#17
Harris Onywera, David Maman, Seth Inzaule, Erick Auma, Kennedy Were, Harrison Fredrick, Prestone Owiti, Valarie Opollo, Jean-François Etard, Irene Mukui, Andrea A Kim, Clement Zeh
HIV-1 transmitted drug resistance (TDR) is of increasing public health concern in sub-Saharan Africa with the rollout of antiretroviral (ARV) therapy. Such data are, however, limited in Kenya, where HIV-1 drug resistance testing is not routinely performed. From a population-based household survey conducted between September and November 2012 in rural western Kenya, we retrospectively assessed HIV-1 TDR baseline rates, its determinants, and genetic diversity among drug-naïve persons aged 15-59 years with acute HIV-1 infections (AHI) and recent HIV-1 infections (RHI) as determined by nucleic acid amplification test and both Limiting Antigen and BioRad avidity immunoassays, respectively...
2017: PloS One
https://www.readbyqxmd.com/read/28105499/cx4945-suppresses-the-growth-of-castration-resistant-prostate-cancer-cells-by-reducing-ar-v7-expression
#18
Chuangzhong Deng, Jieping Chen, Shengjie Guo, Yanjun Wang, Qianghua Zhou, Zaishang Li, Xingping Yang, Xingsu Yu, Zhenfeng Zhang, Fangjian Zhou, Hui Han, Kai Yao
PURPOSE: The aberrant expression of casein kinase 2 (CK2) has been reported to be involved in the tumorigenesis and progression of prostate cancer. The inhibition of CK2 activity represses androgen-dependent prostate cancer cells by attenuating the androgen receptor (AR) signaling pathway. In this study, we examined the effect of CK2 inhibition in castration-resistant prostate cancer (CRPC) cells, in which AR variants (ARVs) play a predominant role. METHODS: A newly synthetic CK2 selective inhibitor CX4945 was utilized to study the effect of CK2 inhibition in CRPC cells by CCK8 assay and colony formation assay...
January 19, 2017: World Journal of Urology
https://www.readbyqxmd.com/read/28104311/comprehensive-profiling-of-the-androgen-receptor-in-liquid-biopsies-from-castration-resistant-prostate-cancer-reveals-novel-intra-ar-structural-variation-and-splice-variant-expression-patterns
#19
Bram De Laere, Pieter-Jan van Dam, Tom Whitington, Markus Mayrhofer, Emanuela Henao Diaz, Gert Van den Eynden, Jean Vandebroek, Jurgen Del-Favero, Steven Van Laere, Luc Dirix, Henrik Grönberg, Johan Lindberg
BACKGROUND: Expression of the androgen receptor splice variant 7 (AR-V7) is associated with poor response to second-line endocrine therapy in castration-resistant prostate cancer (CRPC). However, a large fraction of nonresponding patients are AR-V7-negative. OBJECTIVE: To investigate if a comprehensive liquid biopsy-based AR profile may improve patient stratification in the context of second-line endocrine therapy. DESIGN, SETTING, AND PARTICIPANTS: Peripheral blood was collected from patients with CRPC (n=30) before initiation of a new line of systemic therapy...
January 16, 2017: European Urology
https://www.readbyqxmd.com/read/28096150/hemodynamic-determinants-of-the-short-term-blood-pressure-variability-differential-roles-of-arterial-stiffness-and-wave-reflection
#20
Pai-Feng Hsu, Hao-Min Cheng, Shih-Hsien Sung, Shao-Yuan Chuang, Edward G Lakatta, Frank C P Yin, Pesus Chou, Chen-Huan Chen
BACKGROUND: A high 24-hour ambulatory diastolic (DBP) but not systolic (SBP) blood pressure variability (BPV) is significantly predictive of long-term cardiovascular mortality in untreated hypertensive subjects, independent of office or 24-hour SBP. The present study was aimed to investigate hemodynamic factors that are independently associated with systolic and diastolic BPV from the 24-hour ambulatory blood pressure monitoring (ABPM). METHODS: A cohort of 624 normotensive and 633 untreated hypertensive participants with baseline ABPM was drawn from a community-based survey...
March 1, 2017: American Journal of Hypertension
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