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https://www.readbyqxmd.com/read/27906766/prescription-of-post-exposure-prophylaxis-for-hiv-1-in-the-emergency-room-correct-transmission-risk-assessment-remains-challenging
#1
Alex Marzel, Henriette Heinrich, Lukas Schilliger, Jan S Fehr, Huldrych F Günthard, Roger Kouyos, Silvana K Rampini
BACKGROUND: Limited data are available about the accuracy of PEP prescription in the emergency rooms. Here, we evaluated PEP prescription decision-making with respect to the risk of sexual HIV transmission and the exposed person`s fear vis-à-vis HIV. METHODS: Using a risk-assessment algorithm, we retrospectively evaluated the adequacy of PEP prescription for all persons presenting at the emergency room of the University Hospital Zurich after consensual sex from 2007 to 2013...
November 30, 2016: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/27906032/infection-of-rhesus-macaques-with-a-pool-of-simian-immunodeficiency-virus-with-the-envelope-genes-from-acute-hiv-1-infections
#2
Kendall C Krebs, Meijuan Tian, Mohammed Asmal, Binhua Ling, Kenneth Nelson, Kenneth Henry, Richard Gibson, Yuejin Li, Weining Han, Robin J Shattock, Ronald S Veazey, Norman Letvin, Eric J Arts, Yong Gao
BACKGROUND: New simian-human immunodeficiency chimeric viruses with an HIV-1 env (SHIVenv) are critical for studies on HIV pathogenesis, vaccine development, and microbicide testing. Macaques are typically exposed to single CCR5-using SHIVenv which in most instances does not reflect the conditions during acute/early HIV infection (AHI) in humans. Instead of individual and serial testing new SHIV constructs, a pool of SHIVenv_B derived from 16 acute HIV-1 infections were constructed using a novel yeast-based SHIV cloning approach and then used to infect macaques...
November 25, 2016: AIDS Research and Therapy
https://www.readbyqxmd.com/read/27899925/increased-risk-of-group-b-streptococcus-invasive-infection-in-hiv-exposed-but-uninfected-infants-a-review-of-the-evidence-and-possible-mechanisms
#3
REVIEW
Nicolas Dauby, Mustapha Chamekh, Pierrette Melin, Amy L Slogrove, Tessa Goetghebuer
Group B Streptococcus (GBS) is a major cause of neonatal sepsis and mortality worldwide. Studies from both developed and developing countries have shown that HIV-exposed but uninfected (HEU) infants are at increased risk of infectious morbidity, as compared to HIV-unexposed uninfected infants (HUU). A higher susceptibility to GBS infections has been reported in HEU infants, particularly late-onset diseases and more severe manifestations of GBS diseases. We review here the possible explanations for increased susceptibility to GBS infection...
2016: Frontiers in Immunology
https://www.readbyqxmd.com/read/27898591/tenofovir-exposure-in-utero-and-linear-growth-in-hiv-exposed-uninfected-infants
#4
Stanzi M le Roux, Jennifer Jao, Kirsty Brittain, Tamsin K Phillips, Seun Olatunbosun, Agnes Ronan, Allison Zerbe, Elaine J Abrams, Landon Myer
OBJECTIVE: Tenofovir (TDF) affects bone health and is widely used in pregnancy but data are limited on the effects of TDF exposure in utero. We examined the association between duration of in-utero TDF exposure and linear growth in HIV-exposed, uninfected (HEU) infants. DESIGN: A prospective cohort of pregnant women initiating TDF-containing regimens at primary care services in Cape Town, South Africa, were enrolled and followed with their breastfeeding infants through 12 months postpartum...
January 2, 2017: AIDS
https://www.readbyqxmd.com/read/27892873/evidence-of-disseminated-infection-by-mycobacterium-avium-subspecies-hominissuis-in-a-pet-ferret-mustela-putorius-furo
#5
Javier Bezos, Beatriz Álvarez-Carrión, Antonio Rodríguez-Bertos, Álvaro Fernández-Manzano, Lucía de Juan, Cristina Huguet, Víctor Briones, Beatriz Romero
The infection caused by the zoonotic opportunistic pathogen Mycobacterium avium subsp. hominissuis (Mah) was reported for the first time in a pet ferret. Both owners were HIV-positive. Euthanasia of the pet was recommended due to medical reasons and as a preventive action. Disseminated and open tuberculosis lesions were observed in the gastrointestinal and respiratory systems of the ferret. Ecographic and radiographic surveys showed a severe generalized lymphadenopathy, strong thickening of the gastric wall and peritoneum layer...
September 17, 2016: Research in Veterinary Science
https://www.readbyqxmd.com/read/27885560/expression-of-human-endogenous-retrovirus-k-and-w-in-babies
#6
L H S Nali, A C S Oliveira, D O Alves, G S Caleiro, C F Nunes, D Gerhardt, R C M Succi, Camila M Romano, D M Machado
Here we determined the relative expression of HERV-K and W proviruses in HIV infected and non-infected mothers as well as their respective babies up to 1 year-old. HIV-infected mothers, their babies and uninfected control groups presented expression of both HERV-K and HERV-W with relatively high frequency. While the level of HERV-K expression was similar among groups, the level of HERV-W expression in HIV-infected mothers was four-fold higher than the uninfected mothers from the control group (p < 0.01)...
November 24, 2016: Archives of Virology
https://www.readbyqxmd.com/read/27881650/mechanism-of-enhanced-hiv-restriction-by-virion-coencapsidated-cytidine-deaminases-apobec3f-and-apobec3g
#7
Anjuman Ara, Robin P Love, Tyson B Follack, Khawaja A Ahmed, Madison B Adolph, Linda Chelico
: The APOBEC3 (A3) enzymes, A3G and A3F, are coordinately expressed in CD4+ T cells and can become coencapsidated into HIV-1 virions, primarily in the absence of the viral infectivity factor (Vif). A3F and A3G are deoxycytidine deaminases that inhibit HIV-1 replication by inducing guanine to adenine hypermutation through deamination of cytosine to form uracil in (-)DNA. The effect of the simultaneous presence of both A3G and A3F on HIV-1 restriction ability is not clear. Here, we used a single cycle infectivity assay and biochemical analyses to determine if coencapsidated A3G and A3F differ in their restriction capacity than A3G or A3F alone...
November 23, 2016: Journal of Virology
https://www.readbyqxmd.com/read/27880749/early-diagnosis-of-hiv-infection-in-infants-one-caribbean-and-six-sub-saharan-african-countries-2011-2015
#8
Karidia Diallo, Andrea A Kim, Shirley Lecher, Dennis Ellenberger, R Suzanne Beard, Helen Dale, Mackenzie Hurlston, Molly Rivadeneira, Peter N Fonjungo, Laura N Broyles, Guoqing Zhang, Katrina Sleeman, Shon Nguyen, Steve Jadczak, Nadine Abiola, Raimi Ewetola, Jérémie Muwonga, Franck Fwamba, Christina Mwangi, Mary Naluguza, Charles Kiyaga, Isaac Ssewanyana, Deyde Varough, Domercant Wysler, David Lowrance, Frantz Jean Louis, Olbeg Desinor, Josiane Buteau, Francois Kesner, Vanessa Rouzier, Nat Segaren, Tessa Lewis, Abdoulaye Sarr, Geoffrey Chipungu, Sundeep Gupta, Daniel Singer, Reuben Mwenda, Hilary Kapoteza, Zawadi Chipeta, Nancy Knight, Sergio Carmona, William MacLeod, Gayle Sherman, Yogan Pillay, Clement B Ndongmo, Bridget Mugisa, Annie Mwila, James McAuley, Peter J Chipimo, Wezi Kaonga, Dailess Nsofwa, Davy Nsama, Fales Zulu Mwamba, Crispin Moyo, Clement Phiri, Marie-Yolande Borget, Leonard Ya-Kouadio, Abo Kouame, Christiane A Adje-Toure, John Nkengasong
Pediatric human immunodeficiency virus (HIV) infection remains an important public health issue in resource-limited settings. In 2015, 1.4 million children aged <15 years were estimated to be living with HIV (including 170,000 infants born in 2015), with the vast majority living in sub-Saharan Africa (1). In 2014, 150,000 children died from HIV-related causes worldwide (2). Access to timely HIV diagnosis and treatment for HIV-infected infants reduces HIV-associated mortality, which is approximately 50% by age 2 years without treatment (3)...
November 25, 2016: MMWR. Morbidity and Mortality Weekly Report
https://www.readbyqxmd.com/read/27878224/potential-drug-interactions-in-patients-given-antiretroviral-therapy
#9
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
https://www.readbyqxmd.com/read/27871328/membrane-bound-modified-form-of-clade-b-env-jrcsf-is-suitable-for-immunogen-design-as-it-is-efficiently-cleaved-and-displays-all-the-broadly-neutralizing-epitopes-including-v2-and-c2-domain-dependent-conformational-epitopes
#10
Supratik Das, Saikat Boliar, Nivedita Mitra, Sweety Samal, Manish Bansal, Wayne C Koff, Bimal K Chakrabarti
BACKGROUND: Antigenicity of HIV-1 envelope proteins (Envs) of both lab-adapted and primary isolates expressed on the cell surface rarely match with in vitro neutralization of viruses, pseudo-typed with corresponding Envs. Often, both neutralizing and non-neutralizing antibodies bind to Envs expressed on the cell membrane. This could be due to the lack of efficient cleavage of Env expressed on the cell surface. Naturally occurring, efficiently cleaved Envs with appropriate antigenic properties are relatively rare...
November 21, 2016: Retrovirology
https://www.readbyqxmd.com/read/27861788/phenotypically-resembling-myeloid-derived-suppressor-cells-are-increased-in-children-with-hiv-and-exposed-infected-with-mycobacterium-tuberculosis
#11
Nelita Du Plessis, Ruschca Jacobs, Andrea Gutschmidt, Zhuo Fang, Paul D van Helden, Manfred B Lutz, Anneke C Hesseling, Gerhard Walzl
Increased disease susceptibility during early life has been linked to immune immaturity, regulatory T-cell/TH2 immune biasing and hyporesponsiveness. The contribution of myeloid derived suppressor cells (MDSCs) remains uninvestigated. Here, we assessed peripheral MDSC in HIV-infected and -uninfected children with tuberculosis (TB) disease before, during and after TB treatment, along with matched household contacts (HHCs), HIV-exposed, -infected and -uninfected children without recent TB exposure. Serum analytes and enzymes associated with MDSC accumulation/activation/function were measured by colorimetric- and fluorescence arrays...
November 8, 2016: European Journal of Immunology
https://www.readbyqxmd.com/read/27861238/complementary-feeding-and-diarrhea-and-respiratory-infection-among-hiv-exposed-tanzanian-infants
#12
P Kamenju, E Liu, E Hertzmark, D Spiegelman, R R Kisenge, R Kupka, S Aboud, K P Manji, C Duggan, W W Fawzi
OBJECTIVE: To examine the association between complementary feeding (CF) and risks of diarrhea and acute respiratory infection (ARI) among HIV-exposed infants aged 6-24 months. DESIGN: We prospectively employed an Infant and Child Feeding Index (ICFI) to measure CF practices (breastfeeding status, food consistency, dietary diversity, food group frequency and meal frequency). We determined the association of ICFI and each of its components with the risk of diarrhea and ARI...
November 14, 2016: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/27858357/surface-plasmon-resonance-analysis-of-heparin-binding-angiogenic-growth-factors
#13
Marco Rusnati, Antonella Bugatti
Surface plasmon resonance (SPR) is an optical technique to evaluate biomolecular interactions. Briefly, SPR measures the capacity of two molecules to bind each other by detecting reflected light from a prism-gold film interface. One of the two putative interactants (called ligand) is chemically immobilized onto the gold film. When the sensor is exposed to a sample containing the second interactant (called analyte), its binding to the immobilized ligand causes a change of the refractive index of the material above the gold surface that is monitored as a real-time graph of the response units against time, producing a real-time graph called sensorgram...
2016: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27856821/determinants-of-early-life-lung-function-in-african-infants
#14
Diane Gray, Lauren Willemse, Ane Visagie, Dorottya Czövek, Polite Nduru, Aneesa Vanker, Dan J Stein, Nastassja Koen, Peter D Sly, Zoltán Hantos, Graham L Hall, Heather J Zar
BACKGROUND: Low lung function in early life is associated with later respiratory illness. There is limited data on lung function in African infants despite a high prevalence of respiratory disease. AIM: To assess the determinants of early lung function in African infants. METHOD: Infants enrolled in a South African birth cohort, the Drakenstein child health study, had lung function measured at 6-10 weeks of age. Measurements, made with the infant breathing via a facemask during natural sleep, included tidal breathing, sulfur hexafluoride multiple breath washout and the forced oscillation technique...
November 17, 2016: Thorax
https://www.readbyqxmd.com/read/27856674/longitudinal-evaluation-of-language-impairment-in-youth-with-perinatally-acquired-human-immunodeficiency-virus-hiv-and-youth-with-perinatal-hiv-exposure
#15
Sean M Redmond, Tzy-Jyun Yao, Jonathan S Russell, Mabel L Rice, Howard J Hoffman, George K Siberry, Toni Frederick, Murli Purswani, Paige L Williams
BACKGROUND: Language impairment (LI) risk is increased for perinatally acquired human immunodeficiency virus-infected (PHIV) and perinatally exposed to HIV but uninfected (PHEU) youth. This study evaluates the persistence of LI in these groups. METHODS: The Clinical Evaluation of Language Fundamentals was repeated on participants of the Pediatric HIV/AIDS Cohort Study Adolescent Master Protocol 18 months postbaseline. Regression models identified factors associated with change in standardized score (SC) and the resolution or development of LI...
December 2016: Journal of the Pediatric Infectious Diseases Society
https://www.readbyqxmd.com/read/27856673/associations-of-memory-and-executive-functioning-with-academic-and-adaptive-functioning-among-youth-with-perinatal-hiv-exposure-and-or-infection
#16
Patricia A Sirois, Miriam C Chernoff, Kathleen M Malee, Patricia A Garvie, Lynnette L Harris, Paige L Williams, Steven P Woods, Molly L Nozyce, Betsy L Kammerer, Cenk Yildirim, Sharon L Nichols
BACKGROUND: Perinatally acquired HIV (PHIV) confers risk for neurocognitive impairment, which potentially affects school performance and functional independence of infected children. In this study, we examined the associations of 2 key neurocognitive domains, memory and executive function (EF), with academic and adaptive skills among youth with PHIV and perinatally HIV-exposed but uninfected (PHEU) youth. METHODS: Participants ages 9 to <19 years enrolled in the Pediatric HIV/AIDS Cohort Study's Memory and Executive Functioning Study completed standardized measures of reading and math...
December 2016: Journal of the Pediatric Infectious Diseases Society
https://www.readbyqxmd.com/read/27856672/executive-functioning-in-children-and-adolescents-with-perinatal-hiv-infection-and-perinatal-hiv-exposure
#17
Sharon L Nichols, Miriam C Chernoff, Kathleen M Malee, Patricia A Sirois, Steven P Woods, Paige L Williams, Cenk Yildirim, Dean Delis, Betsy Kammerer
BACKGROUND: Executive functions (EFs) are critical for management of life activities, but few studies have evaluated EFs in children and adolescents with perinatally acquired HIV (PHIV), who are at risk for problems in academics, behavior, and medication adherence. We compared EFs in youth with PHIV and in perinatally HIV-exposed but uninfected (PHEU) youth. METHODS: Four Delis-Kaplan Executive Function System (D-KEFS) subtests were administered to 173 youth with PHIV and 85 PHEU youth, aged 9 to <19 years, who were enrolled in the Pediatric HIV/AIDS Cohort Study (PHACS) Memory and Executive Functioning Study...
December 2016: Journal of the Pediatric Infectious Diseases Society
https://www.readbyqxmd.com/read/27847176/association-of-serum-bactericidal-antibody-and-opsonic-antibody-levels-after-neisseria-meningitidis-serogroup-c-conjugate-vaccine-in-brazilian-children-and-adolescents-infected-or-not-infected-with-hiv
#18
Wânia F Pereira-Manfro, Raquel M Alvino, Aline C Cruz, Giselle P Silva, Raquel B N Castro, Bianca Ferreira, Daniella M Barreto, Ana Cristina C Frota, Cristina B Hofer, Lucimar G Milagres
Neisseria meningitidis serogroup C (MenC) is the main causative agent of meningitis in Brazil. HIV infection affects the quality of the immune system. HIV(+) children have an increased risk of infection to encapsulated bacteria such as N. meningitidis. We evaluated the opsonic antibody (OPA) levels and its correlation with serum bactericidal antibody (SBA) levels induced by one and two doses of a MenC conjugate vaccine in children and adolescents HIV(+) and HIV-exposed but uninfected children (HEU) group. Overall the data show the importance of two doses of vaccine for HIV(+) individuals...
December 7, 2016: Vaccine
https://www.readbyqxmd.com/read/27846736/small-molecule-cd4-mimetics-sensitize-hiv-1-infected-cells-to-adcc-by-antibodies-elicited-by-multiple-envelope-glycoprotein-immunogens-in-non-human-primates
#19
Shilei Ding, Myriam M Verly, Amy Princiotto, Bruno Melillo, Tony Moody, Todd Bradley, David Easterhoff, Michele Roger, Beatrice H Hahn, Navid Madani, Amos B Smith Iii, Barton F Haynes, Joseph G Sodroski, Andres Finzi
Recent studies have linked antibody Fc-mediated effector functions with control of human immunodeficiency virus type 1 (HIV-1) and simian immunodeficiency virus (SIV) infections. Interestingly, the presence of antibodies with potent antibody-dependent cellular cytotoxicity (ADCC) activity in RV144 vaccine trial participants correlated inversely with HIV-1 acquisition risk. These antibodies were recently found to recognize epitopes on the HIV-1 envelope (Env) glycoprotein exposed upon Env-CD4 binding. Accordingly, small molecule CD4-mimetics (CD4mc) that induce Env to sample the CD4-bound conformation were shown to sensitize HIV-1-infected cells to ADCC mediated by sera from HIV-1-infected individuals...
November 16, 2016: AIDS Research and Human Retroviruses
https://www.readbyqxmd.com/read/27846415/chinks-in-the-armor-of-the-hiv-1-envelope-glycan-shield-implications-for-immune-escape-from-anti-glycan-broadly-neutralizing-antibodies
#20
Thandeka Moyo, Roux-Cil Ferreira, Reyaaz Davids, Zarinah Sonday, Penny L Moore, Simon A Travers, Natasha T Wood, Jeffrey R Dorfman
Glycans on HIV-1 Envelope serve multiple functions including blocking epitopes from antibodies. We show that removal of glycan 301, a major target of anti-V3/glycan antibodies, has substantially different effects in two viruses. While glycan 301 on Du156.12 blocks epitopes commonly recognized by sera from chronically HIV-1-infected individuals, it does not do so on CAP45.G3, suggesting that removing the 301 glycan has a smaller effect on the integrity of the glycan shield in CAP45.G3. Changes in sensitivity to broadly neutralizing monoclonal antibodies suggest that the interaction between glycan 301 and the CD4 binding site differ substantially between these 2 viruses...
November 12, 2016: Virology
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