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https://www.readbyqxmd.com/read/28747624/number-of-infection-events-per-cell-during-hiv-1-cell-free-infection
#1
Yusuke Ito, Azaria Remion, Alexandra Tauzin, Keisuke Ejima, Shinji Nakaoka, Yoh Iwasa, Shingo Iwami, Fabrizio Mammano
HIV-1 accumulates changes in its genome through both recombination and mutation during the course of infection. For recombination to occur, a single cell must be infected by two HIV strains. These coinfection events were experimentally demonstrated to occur more frequently than would be expected for independent infection events and do not follow a random distribution. Previous mathematical modeling approaches demonstrated that differences in target cell susceptibility can explain the non-randomness, both in the context of direct cell-to-cell transmission, and in the context of free virus transmission (Q...
July 26, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28739783/effect-of-rifampin-on-the-single-dose-pharmacokinetics-of-oral-cabotegravir-in-healthy-subjects
#2
S L Ford, K Sutton, Y Lou, Z Zhang, A Tenorio, C Trezza, P Patel, W Spreen
Introduction: Drug-drug interactions between antiretroviral medications and rifampin complicate the treatment of HIV and tuberculosis coinfection. This study evaluated the effect of rifampin on the pharmacokinetics of oral cabotegravir, an integrase strand transfer inhibitor being investigated for long-acting treatment and prevention of HIV-1 infection.Methods: This was a phase I, single-center, open-label, fixed-sequence crossover study in healthy adults. The objective was to evaluate the effect of steady-state rifampin on the single-dose plasma pharmacokinetics of cabotegravir...
July 24, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28723710/controlled-attenuation-parameter-and-mr-spectroscopy-measured-liver-steatosis-are-discordant-in-hiv-infected-adults-with-high-body-mass
#3
Jennifer C Price, Jennifer L Dodge, Yifei Ma, Rebecca Scherzer, Natalie Korn, Kyle Tillinghast, Marion G Peters, Susan Noworolski, Phyllis C Tien
OBJECTIVE: Hepatic steatosis (HS) is common in HIV-infected individuals. Magnetic resonance spectroscopy (MRS) is the preferred non-invasive method for HS measurement but is expensive. Controlled attenuation parameter (CAP) also assesses HS and is conveniently performed concomitantly with transient elastography. We aimed to assess the accuracy of CAP in the setting of HIV infection. DESIGN: Cross-sectional study. METHODS: CAP and MRS were performed in 82 subjects (39 HIV-monoinfected;7 HCV-monoinfected;21 HIV/HCV-coinfected; 15 with neither infection)...
July 18, 2017: AIDS
https://www.readbyqxmd.com/read/28722631/dengue-virus-coinfection-in-human-immunodeficiency-virus-1-infected-patients-on-the-west-coast-of-mexico
#4
Francisco Espinoza-Gómez, Iván Delgado-Enciso, Salvador Valle-Reyes, Rodolfo Ochoa-Jiménez, Conrado Arechiga-Ramírez, José L Gámez-Arroyo, Roberto Vázquez-Campuzano, Carmen Guzmán-Bracho, Clemente Vásquez, Uriel A López-Lemus
Dengue virus infection in human immunodeficiency virus (HIV)-positive patients is not well studied. Previous reports suggest a transitory inhibition of the HIV-1 viral load, as well as a benign clinical progression of dengue. The follow-up of six HIV-1-infected patients, diagnosed and hospitalized with dengue virus infection in the State of Colima, Mexico, was carried out to analyze the progression of this viral coinfection. The presence of dengue virus serotype 1 was confirmed through molecular tests. No severe complications were observed in any of the patients during dengue virus infection...
June 12, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28722596/therapeutic-response-in-adult-patients-with-nonsevere-chronic-paracoccidioidomycosis-treated-with-sulfamethoxazole-trimethoprim-a-retrospective-study
#5
Andreia F Nery, Natasha P Crepaldi, Soraya B R S Rossi, Tomoko Tadano, Fabio A Leal-Santos, Rosane Christine Hahn, Valfredo M Menezes, Cor Jesus F Fontes
According to the Brazilian Consensus on Paracoccidioidomycosis (PCM), itraconazole is the drug of choice for treatment. However, the combination of sulfamethoxazole and trimethoprim (SMX-TMP) is most commonly used in clinical practice because of its higher availability in the public health services. The aims of this study were to evaluate the therapeutic response of patients with nonsevere chronic PCM to SMX-TMP and highlight the factors related to treatment failure. An adequate therapeutic response was defined as completely improved disease signs and symptoms after medication use for a minimum of 6 months, followed by normalized hematological and biochemical changes, radiological improvements, and negative mycological examination findings...
May 30, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28722574/intestinal-parasitic-infections-in-human-immunodeficiency-virus-infected-and-noninfected-persons-in-a-high-human-immunodeficiency-virus-prevalence-region-of-cameroon
#6
Céline Nguefeu Nkenfou, Sandrine Mboula Tchameni, Carine Nguefeu Nkenfou, Patrice Djataou, Ulrich Florian Simo, Alexandre Benjamin Nkoum, William Estrin
The problem of intestinal parasitic infection in human immunodeficiency virus (HIV)-infected people requires careful consideration in the developing world where poor nutrition is associated with poor hygiene and several coinfecting diseases. Studies have addressed this issue in Cameroon, especially in the low HIV prevalence area. The current study was conducted to determine the prevalence of intestinal parasitosis in people living with HIV (PLHIV) in Adamaoua and to identify associated risk factors. Stool and blood specimens from study participants were screened for intestinal parasites and anti-HIV antibodies, respectively...
June 26, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28722331/hepatitis-c-virus-and-proprotein-convertase-subtilisin-kexin-type-9-a-detrimental-interaction-to-increase-viral-infectivity-and-disrupt-lipid-metabolism
#7
REVIEW
Matteo Pirro, Vanessa Bianconi, Daniela Francisci, Elisabetta Schiaroli, Francesco Bagaglia, Amirhossein Sahebkar, Franco Baldelli
From viral binding to the hepatocyte surface to extracellular virion release, the replication cycle of the hepatitis C virus (HCV) intersects at various levels with lipid metabolism; this leads to a derangement of the lipid profile and to increased viral infectivity. Accumulating evidence supports the crucial regulatory role of proprotein convertase subtilisin/kexin type 9 (PCSK9) in lipoprotein metabolism. Notably, a complex interaction between HCV and PCSK9 has been documented. Indeed, either increased or reduced circulating PCSK9 levels have been observed in HCV patients; this discrepancy might be related to several confounders, including HCV genotype, human immunodeficiency virus (HIV) coinfection and the ambiguous HCV-mediated influence on PCSK9 transcription factors...
July 18, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28722244/risk-of-liver-decompensation-with-cumulative-use-of-mitochondrial-toxic-nucleoside-analogues-in-hiv-hepatitis-c-virus-coinfection
#8
Vincent Lo Re Rd, Bret Zeldow, Michael J Kallan, Janet P Tate, Dena M Carbonari, Sean Hennessy, Jay R Kostman, Joseph K Lim, Matthew Bidwell Goetz, Robert Gross, Amy C Justice, Jason A Roy
PURPOSE: Among patients dually infected with human immunodeficiency virus (HIV) and chronic hepatitis C virus (HCV), use of antiretroviral therapy (ART) containing mitochondrial toxic nucleoside reverse transcriptase inhibitors (mtNRTIs) might induce chronic hepatic injury, which could accelerate HCV-associated liver fibrosis and increase the risk of hepatic decompensation and death. METHODS: We conducted a cohort study among 1747 HIV/HCV patients initiating NRTI-containing ART within the Veterans Aging Cohort Study (2002-2009) to determine if cumulative mtNRTI use increased the risk of hepatic decompensation and death among HIV-/HCV-coinfected patients...
July 19, 2017: Pharmacoepidemiology and Drug Safety
https://www.readbyqxmd.com/read/28721101/survey-of-malaria-and-anti-dengue-virus-igg-among-febrile-hiv-infected-patients-attending-a-tertiary-hospital-in-abuja-nigeria
#9
Jelili Olaide Mustapha, Anthony Uchenna Emeribe, Idris Abdullahi Nasir
BACKGROUND: Dengue and malaria are infections, of great public health concern, especially in sub-Saharan Africa where the burden of HIV infection is high. This study was conducted to determine the seroprevalence of dengue virus IgG antibodies and dengue/malaria coinfection among febrile HIV-infected patients attending the University of Abuja Teaching Hospital, Gwagwalada, Abuja. METHODS: In this cross-sectional study, blood samples from 178 consenting HIV-infected patients receiving antiretroviral therapy were collected and tested for plasmodiasis and anti-Dengue virus IgG using malaria microscopy and ELISA, respectively...
2017: HIV/AIDS: Research and Palliative Care
https://www.readbyqxmd.com/read/28719501/evaluation-of-the-adequacy-of-the-2010-revised-world-health-organization-recommended-dosages-of-the-first-line-antituberculosis-drugs-for-children
#10
Hongmei Yang, Anthony Enimil, Fizza S Gillani, Sampson Antwi, Albert Dompreh, Antoinette Ortsin, Eugene Adu Awhireng, Maxwell Owusu, Lubbe Wiesner, Charles A Peloquin, Awewura Kwara
BACKGROUND: The World Health Organization recommended increased dosages of the first-line antituberculosis (anti-TB) drugs for children in 2010. We examined the frequency of and factors associated with low plasma maximum concentration (Cmax) of each drug in children treated with the revised dosages. METHODS: Children on anti-TB therapy for at least 4 weeks underwent pharmacokinetic testing. Plasma Cmax below the lower limit of proposed reference range was considered low...
July 14, 2017: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/28719322/case-report-disseminated-talaromyces-penicillium-marneffei-and-mycobacterium-tuberculosis-coinfection-in-a-japanese-patient-with-acquired-immunodeficiency-syndrome
#11
Shuji Hatakeyama, Takeshi Yamashita, Toshiyasu Sakai, Katsuhiko Kamei
Talaromyces marneffei is a dimorphic fungus endemic mainly in southeast and south Asia. It causes severe mycosis, usually in immunocompromised individuals, such as those with human immunodeficiency virus (HIV) infection. Concomitant infection with T. marneffei and other opportunistic pathogens is plausible because the majority of T. marneffei infections occur in patients with advanced HIV infection. Nonetheless, coinfection in the same site has rarely been reported, and poses a considerable diagnostic and therapeutic challenge...
July 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28719316/high-mortality-and-coinfection-in-a-prospective-cohort-of-human-immunodeficiency-virus-acquired-immune-deficiency-syndrome-patients-with-histoplasmosis-in-guatemala
#12
Blanca Samayoa, Monika Roy, Angela Ahlquist Cleveland, Narda Medina, Dalia Lau-Bonilla, Christina M Scheel, Beatriz L Gomez, Tom Chiller, Eduardo Arathoon
Histoplasmosis is one of the most common and deadly opportunistic infections among persons living with human immunodeficiency virus (HIV)/acquired immune deficiency syndrome in Latin America, but due to limited diagnostic capacity in this region, few data on the burden and clinical characteristics of this disease exist. Between 2005 and 2009, we enrolled patients ≥ 18 years of age with suspected histoplasmosis at a hospital-based HIV clinic in Guatemala City. A case of suspected histoplasmosis was defined as a person presenting with at least three of five clinical or radiologic criteria...
July 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28718492/-hiv-and-syphilis-coinfection-in-pregnancy-and-vertical-hiv-transmission-a-study-based-on-epidemiological-surveillance-data
#13
Lisiane M W Acosta, Tonantzin Ribeiro Gonçalves, Nêmora Tregnago Barcellos
Objective: To estimate the rate of HIV and syphilis coinfection among pregnant women living in Porto Alegre, Brazil, as well as the association of coinfection with vertical HIV transmission and socioeconomic variables. Method: This analytical retrospective cross-sectional study employed data from the regular epidemiological surveillance system for the period from 2010 to 2013. Data were obtained regarding pregnant women with HIV and exposed children, syphilis in pregnancy, and congenital syphilis...
December 2016: Revista Panamericana de Salud Pública, Pan American Journal of Public Health
https://www.readbyqxmd.com/read/28715086/optimal-use-of-transient-elastography-and-acoustic-radiation-force-impulse-to-stage-liver-fibrosis-in-hiv-hcv-coinfected-patients-in-clinical-practice
#14
Juan José López, Núria Pérez-Àlvarez, Raul V Rodríguez, Antoni Jou, Pere Carbonell, José A Jiménez, Laura Soldevila, Montserrat Tenesa, Jordi Tor, Bonaventura Clotet, Jordi Bechini, Cristina Tural
OBJECTIVES: Liver fibrosis (LF) is crucial for the individualized management of patients with hepatitis C virus (HCV). We evaluated the concordance between two noninvasive methods for staging LF, transient elastography (TE) and acoustic radiation force impulse (ARFI), in patients coinfected with human immunodeficiency virus and HCV. We propose an algorithm for optimal use of both techniques in routine clinical practice. METHODS: A total of 89 human immunodeficiency virus/HCV-coinfected patients underwent TE and ARFI on the same day...
July 17, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28715065/hypertension-dyslipidemia-and-cardiovascular-risk-in-hiv-infected-adults-in-poland
#15
Magdalena Rogalska-Płońska, Paweł Rogalski, Magdalena Leszczyszyn-Pynka, Justyna Stempkowska, Piotr Kocbach, Aldona Kowalczuk-Kot, Małgorzata Janczarek, Anna Grzeszczuk
BACKGROUND: Prevalence of cardiovascular diseases (CVD) in HIV infected patients increases with aging and duration of the disease. Hypertension (HA), high cholesterol level obesity, diabetes, tobacco exposure and use of alcohol are among the traditional risk factors that contribute to CVD. AIM: was to determinate the incidence of HA, lipid disturbances and CVD risk in dependence on clinical, viral and biochemical factors. METHODS: Four hundred and seventeen HIV infected Caucasian adult patients from the four clinical centers in Poland were enrolled and analyzed on the basis of available medical data from the years 2013-2015...
July 17, 2017: Kardiologia Polska
https://www.readbyqxmd.com/read/28702728/cd8-t-cell-expansion-in-hiv-hcv-coinfection-is-associated-with-systemic-inflammation
#16
E V Saidakova, K V Shmagel, L B Korolevskaya, N G Shmagel, V A Chereshnev
High prevalence of non-AIDS-defining illnesses in treated HIV-infected patients is associated with increased peripheral CD8(+) T cell counts. Hepatitis C virus (HCV) coinfection is an additional risk factor for the development of non-AIDS events. We found that, in HIV/HCV coinfection, the increased proportion of CD8(+) T lymphocytes is due to the effector memory and terminal effector T cells gain. Moreover, in these patients, the accumulation of highly differentiated forms of CD8(+) T lymphocytes was associated with increased concentrations of inflammatory indices...
May 2017: Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
https://www.readbyqxmd.com/read/28694828/prevalence-and-risk-factors-of-delayed-sputum-conversion-among-patients-treated-for-smear-positive-ptb-in-northwestern-rural-tanzania-a-retrospective-cohort-study
#17
Daniel W Gunda, Igembe Nkandala, Godfrey A Kavishe, Semvua B Kilonzo, Rodrick Kabangila, Bonaventura C Mpondo
INTRODUCTION: Smear positive TB carries high morbidity and mortality. The TB treatment aims at sputum conversion by two months of antituberculous. Patients who delay sputum conversion remain potentially infectious, with risk of treatment failure, drug resistance, and mortality. Little is known about the magnitude of this problem in our setting. This study was designed to determine the prevalence and risk factors of delayed sputum conversion in northwestern rural part of Tanzania. METHODS: This was a retrospective cohort study involving smear positive TB patients at Sengerema DDH in 2015...
2017: Journal of Tropical Medicine
https://www.readbyqxmd.com/read/28692539/hiv-hepatitis-b-virus-co-infection-epidemiology-pathogenesis-and-treatment
#18
Kasha P Singh, Megan Crane, Jennifer Audsley, Sharon R Lewin
: HIV infection has a significant impact on the natural history of chronic hepatitis B virus (HBV) infection, with increased levels of HBV DNA, accelerated progression of liver disease, and increased liver-associated mortality compared with HBV monoinfection. Widespread uptake and early initiation of HBV-active antiretroviral therapy has substantially improved the natural history of HIV-HBV coinfection but the prevalence of liver disease remains elevated in this population. In this paper, we review recent studies examining the natural history and pathogenesis of liver disease and seroconversion in HIV-HBV coinfection in the era of HBV-active antiretroviral therapy and the effects of HIV directly on liver disease...
July 7, 2017: AIDS
https://www.readbyqxmd.com/read/28692530/limited-overlap-between-phylogenetic-hiv-and-hcv-clusters-illustrates-the-dynamic-sexual-network-structure-of-dutch-hiv-infected-msm
#19
Joost W Vanhommerig, Daniela Bezemer, Richard Molenkamp, Ard I Van Sighem, Colette Smit, Joop E Arends, Fanny N Lauw, Kees Brinkman, Bart J Rijnders, Astrid M Newsum, Sylvia M Bruisten, Maria Prins, Jan T Van Der Meer, Thijs J Van De Laar, Janke Schinkel
OBJECTIVE: Men who have sex with men (MSM) are at increased risk for infection with HIV-1 and hepatitis C virus (HCV). Is HIV/HCV-coinfection confined to specific HIV transmission networks? DESIGN AND METHODS: A HIV pol phylogenetic tree was constructed for 5,038 HIV-1 subtype B infected MSM from the ATHENA cohort. We investigated (i) the existence of HIV clusters with increased HCV prevalence, (ii) the HIV phylogenetic density (i.e. the number of potential HIV transmission partners) of HIV/HCV-coinfected MSM compared to HIV-infected MSM without HCV, and (iii) the overlap in HIV and HCV phylogenies using HCV NS5B sequences from 183 HIV-infected MSM with acute HCV-infection...
July 7, 2017: AIDS
https://www.readbyqxmd.com/read/28690879/epidemiological-characteristics-and-clinical-outcome-of-hiv-related-tuberculosis-in-a-population-of-tb-patients-in-south-western-nigeria
#20
Olugbenga A Olowe, Olufunmilola B Makanjuola, Adeniyi S Adekanmi, Olusola J Adefioye, Rita A Olowe
Tuberculosis (TB) is the second leading cause of death from infectious disease globally with its impact more dramatic in resource limited settings. Individuals with human immunodeficiency virus (HIV) infection who also develop tuberculosis represent a significant challenge to TB control. This study was carried out to determine the prevalence of TB-HIV coinfection and pattern of infection among TB patients. We also compared treatment outcome among coinfected patients with those not coinfected. A six-year retrospective review of records of patients managed at the Tuberculosis Treatment Center of the LAUTECH Teaching Hospital, South-Western Nigeria from January 2009 to December 2014 was carried out...
June 2017: European Journal of Microbiology & Immunology
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