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https://www.readbyqxmd.com/read/28633455/fetal-metabolic-stress-disrupts-immune-homeostasis-and-induces-pro-inflammatory-responses-in-hiv-1-and-cart-exposed-infants
#1
Johannes C Schoeman, Gontse P Moutloatse, Amy C Harms, Rob J Vreeken, Henriette J Scherpbier, Liesbeth Van Leeuwen, Taco W Kuijpers, Carools J Reinecke, Ruud Berger, Thomas Hankemeier, Madeleine J Bunders
Increased morbidity and fetal growth restriction are reported in uninfected children born to HIV-1-infected women treated with antiretroviral (ARV) therapy. Viruses and/or pharmacological interventions such as ARVs can induce metabolic stress skewing the cell's immune response and restricting (cell) growth. Novel metabolomic techniques provided the opportunity to investigate the impact of fetal HIV-1 and combination ARV therapy (cART)-exposure on the infants' immune-metabolome. Peroxidized lipids, generated by reactive oxygen species, were increased in cART/HIV-1-exposed infants, indicating altered mitochondrial functioning...
June 17, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28628526/determinants-of-hiv-1-cd4-independent-brain-adaptation
#2
Madina Shakirzyanova, Xiang-Peng Kong, Cecilia Cheng-Mayer
BACKGROUND: HIV-1 is known to adapt to the local environment in its usage of receptors and it can become CD4 independent in the brain where the receptor is scarce. This adaptation is through amino acid variations, but the patterns of such variation are not yet well understood. Given that infection of long-lived CD4-low and CD4-negative cells in anatomic compartments such as the brain expand cell tropism in vivo and may serve as potential viral reservoirs that pose challenge for HIV eradication, understanding the evolution to CD4-independence and envelope conformation associated with infection in the absence of CD4 will not only broaden our insights into HIV pathogenesis, but may guide functional cure strategies as well...
June 15, 2017: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/28621223/a-generation-at-risk-a-cross-sectional-study-on-hiv-aids-knowledge-exposure-to-mass-media-and-stigmatizing-behaviors-among-young-women-aged-15-24-years-in-ghana
#3
Charity Konadu Asamoah, Benedict Oppong Asamoah, Anette Agardh
HIV/AIDS stigmatizing behaviors are a huge barrier to early detection and treatment of individuals with the AIDS virus. HIV/AIDS stigma and related consequences are debilitating, especially for vulnerable populations. This study sought to assess whether young women's HIV/AIDS knowledge levels and exposure to mass media (television and radio) have an influence on their stigmatizing behaviors and role as agents of stigma towards individuals living with HIV and AIDS. The data used for this study originated from the Ghana Multiple Indicator Cluster Survey 2011...
2017: Global Health Action
https://www.readbyqxmd.com/read/28615206/plasticity-and-epitope-exposure-of-the-hiv-1-envelope-trimer
#4
Rebecca L R Powell, Maxim Totrov, Vincenza Itri, Xiaomei Liu, Alisa Fox, Susan Zolla-Pazner
We recently showed that mutations in the HIV-1 Envelope (Env) destabilize the V3 loop, rendering neutralization-resistant viruses sensitive to V3-directed monoclonal antibodies (mAbs). Here we investigated the propagation of this effect on other Env epitopes, with special emphasis on V2 loop exposure. Wildtype JR-FL and 19 mutant JR-FL pseudoviruses were tested for neutralization sensitivity to 21 mAbs specific for epitopes in V2, the CD4 binding site (CD4bs), and the CD4-induced (CD4i) region. Certain glycan mutants, mutations in the gp120 hydrophobic core, and mutations in residues involved in intra-protomer interactions exposed epitopes in the V2i region (overlays the α4β7 integrin binding site) and the V3 crown, suggesting a general destabilization of the distal region of the trimer apex...
June 14, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28609788/resolving-sugar-puckers-in-rna-excited-states-exposes-slow-modes-of-repuckering-dynamics
#5
Mary C Clay, Laura R Ganser, Dawn K Merriman, Hashim M Al-Hashimi
Recent studies have shown that RNAs exist in dynamic equilibrium with short-lived low-abundance 'excited states' that form by reshuffling base pairs in and around non-canonical motifs. These conformational states are proposed to be rich in non-canonical motifs and to play roles in the folding and regulatory functions of non-coding RNAs but their structure proves difficult to characterize given their transient nature. Here, we describe an approach for determining sugar pucker conformation in RNA excited states through nuclear magnetic resonance measurements of C1΄ and C4΄ rotating frame spin relaxation (R1ρ) in uniformly 13C/15N labeled RNA samples...
June 13, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28609400/cytomegalovirus-viraemia-is-associated-with-poor-growth-and-t-cell-activation-with-an-increased-burden-in-hiv-exposed-uninfected-infants
#6
Miguel A Garcia-Knight, Eunice Nduati, Amin S Hassan, Irene Nkumama, Timothy J Etyang, Naseem J Hajj, Faith Gambo, Denis Odera, James A Berkley, Sarah L Rowland-Jones, Britta Urban
OBJECTIVE: Factors associated with poor health in HIV-exposed-uninfected (HEU) infants are poorly defined. We describe the prevalence and correlates of CMV viraemia in HEU and HIV-unexposed-uninfected (HUU) infants, and quantify associations with anthropometric, haematological and immunological outcomes. DESIGN: Cross-sectional, including HEU and HUU infants from rural coastal Kenya. METHODS: Infants aged 2-8 months were studied. The primary outcome was CMV viraemia and viral load, determined by quantitative PCR...
June 12, 2017: AIDS
https://www.readbyqxmd.com/read/28601098/emotional-appeals-in-hiv-prevention-campaigns-unintended-stigma-effects
#7
Prawit Thainiyom, Katherine Elder
OBJECTIVES: The purpose of this study was to determine whether HIV/AIDS public service announcements (PSAs) that use emotional appeals have unintended effects of creating stigmatizing attitudes in their viewers. METHODS: We analyzed data for 240 respondents located in the United States who were recruited online. Respondents were randomly assigned to one of 3 conditions, where they viewed a PSA with hope appeals, fear appeals, or non-emotional appeals. Respondents then answered a series of questions about their attitudes about HIV/AIDS; testing behavior; engagement with HIV/AIDS-related people, organizations, and issues; and HIV/AIDS knowledge...
July 1, 2017: American Journal of Health Behavior
https://www.readbyqxmd.com/read/28591258/immune-development-in-hiv-exposed-uninfected-children-born-to-hiv-infected-women
#8
Maristela Miyamoto, Aída F T B Gouvêa, Erika Ono, Regina Célia M Succi, Savita Pahwa, Maria Isabel de Moraes-Pinto
Immunological and clinical findings suggestive of some immune dysfunction have been reported among HIV-exposed uninfected (HEU) children and adolescents. Whether these defects are persistent or transitory is still unknown. HEU pediatric population at birth, 12 months, 6-12 years were evaluated in comparison to healthy age-matched HIV-unexposed controls. Plasma levels of LPS, sCD14, cytokines, lymphocyte immunophenotyping and T-cell receptor excision circles (TREC) were assessed. HEU and controls had similar LPS levels, which remained low from birth to 6-12 years; for plasma sCD14, IL-2, IL-6, IL-7, IL-10, IL-12p70, IL-13, IL-17, IFN-γ, TNF-α, G-CSF, GM-CSF and MCP-1, which increased from birth to 12 months and then decreased at 6-12 years; and for TREC/106 PBMC at birth in HEU and controls...
June 1, 2017: Revista do Instituto de Medicina Tropical de São Paulo
https://www.readbyqxmd.com/read/28590477/evaluation-of-ligand-based-nmr-screening-methods-to-characterize-small-molecule-binding-to-hiv-1-glycoprotein-41
#9
Shidong Chu, Guangyan Zhou, Miriam Gochin
Small molecule inhibitors of glycoprotein-41 (gp41) are able to prevent HIV infection by binding to a hydrophobic pocket (HP) contained within the gp41 ectodomain, and preventing progression of fusion. There is little structural information on gp41-ligand complexes, owing to hydrophobicity of the ligands, occlusion of the HP in folded gp41 ectodomain, and failure to form crystals of complexes. Here we used an engineered gp41 ectodomain protein containing an exposed HP and a small molecule designed to bind with weak affinity to the HP...
June 28, 2017: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/28582435/school-and-household-tuberculosis-contact-investigations-in-swaziland-active-tb-case-finding-in-a-high-hiv-tb-burden-setting
#10
Piluca Alonzo Ustero, Alexander W Kay, Katherine Ngo, Rachel Golin, Bhekisisa Tsabedze, Bulisile Mzileni, Jessica Glickman, Mildred Wisile Xaba, Gcinile Mavimbela, Anna Maria Mandalakas
BACKGROUND: Investigation of household contacts exposed to infectious tuberculosis (TB) is widely recommended by international guidelines to identify secondary cases of TB and limit spread. There is little data to guide the use of contact investigations outside of the household, despite strong evidence that most TB infections occur outside of the home in TB high burden settings. In older adolescents, the majority of infections are estimated to occur in school. Therefore, as part of a project to increase active case finding in Swaziland, we performed school contact investigations following the identification of a student with infectious TB...
2017: PloS One
https://www.readbyqxmd.com/read/28579471/first-case-of-vaccine-strain-varicella-infection-as-manifestation-of-hiv-in-healthcare-worker-a-case-report-and-review-of-the-literature
#11
REVIEW
Bhagyashri D Navalkele, Oryan Henig, Marilynn Fairfax, Elaine Flanagan, Mark Upfal, Jim Russell, Sorabh Dhar, Keith Kaye, Teena Chopra
Live-attenuated varicella vaccination is safe in non-immunocompromised population and associated with rare non-serious adverse events. A healthcare worker (HCW) developed varicella infection and exposure investigation led to immunization against varicella in an exposed non-immune HCW. Subsequently, vaccine-strain induced disseminated varicella and progressive outer retinal necrosis in the exposed HCW resulted in identification of undiagnosed HIV infection. Here, we review serious adverse events from varicella vaccination and advice extreme caution prior to live vaccination of healthcare workers...
June 1, 2017: Journal of Hospital Infection
https://www.readbyqxmd.com/read/28576902/application-of-pharmacogenomics-to-investigate-adverse-drug-reactions-to-the-disease-modifying-treatments-for-multiple-sclerosis-a-case-control-study-protocol-for-dimethyl-fumarate-induced-lymphopenia
#12
Kaarina Kowalec, Elaine Kingwell, Robert Carruthers, Ruth Ann Marrie, Sasha Bernatsky, Anthony Traboulsee, Colin J D Ross, Bruce Carleton, Helen Tremlett
INTRODUCTION: Adverse drug reactions (ADRs) are a global public health issue. The potential for pharmacogenomic biomarkers has been demonstrated in several therapeutical areas, including HIV infection and oncology. Dimethyl fumarate (DMF) is a licensed disease-modifying therapy for the treatment of multiple sclerosis (MS). The use of DMF in MS has been associated with a severe reduction in lymphocyte counts and reports of progressive multifocal leukoencephalopathy. Here, we outline the protocol for a case-control study designed to discover genomic variants associated with DMF-induced lymphopenia...
June 2, 2017: BMJ Open
https://www.readbyqxmd.com/read/28575201/birth-weight-and-preterm-delivery-outcomes-of-perinatally-vs-non-perinatally-hiv-infected-pregnant-women-in-the-u-s-results-from-the-phacs-smartt-study-and-impaact-p1025-protocol
#13
Jennifer Jao, Deborah Kacanek, Paige L Williams, Mitchell E Geffner, Elizabeth G Livingston, Rhoda S Sperling, Kunjal Patel, Arlene D Bardeguez, Sandra K Burchett, Nahida Chakhtoura, Gwendolyn B Scott, Russell B Van Dyke, Elaine J Abrams
Background: Pregnancy outcomes of perinatally HIV-infected women (PHIV) are poorly defined. Methods: We compared preterm delivery and birth weight (BW) outcomes [low BW (LBW, <2500 g), small-for-gestational-age (SGA), and BW z-scores (BWZ)] in HIV-exposed uninfected infants of PHIV vs. non-perinatally HIV-infected (NPHIV) pregnant women in the PHACS SMARTT or IMPAACT P1025 studies. Mixed effects models were fit to assess the association of maternal PHIV status with infant BWZ; log binomial models were used to estimate adjusted relative risks (aRR) for dichotomous outcomes...
May 30, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28574336/early-infant-diagnosis-of-hiv-in-myanmar-call-for-innovative-interventions-to-improve-uptake-and-reduce-turnaround-time
#14
Soe Thiha, Hemant Deepak Shewade, Sairu Philip, Thet Ko Aung, Nang Thu Thu Kyaw, Myo Minn Oo, Khine Wut Yee Kyaw, May Wint War, Htun Nyunt Oo
BACKGROUND: In collaboration with the national AIDS program, early infant diagnosis (EID) is implemented by Integrated HIV Care (IHC) program through its anti-retroviral therapy (ART) centers across 10 cities in five states and regions of Myanmar. Blood samples from the ART centers are sent using public transport to a centralized PCR facility. OBJECTIVES: Among HIV-exposed babies <9 months at enrolment into IHC program (2013-15), to describe the EID cascade (enrolment, sample collection for PCR, result receipt by mother, HIV diagnosis and ART initiation) and factors associated with delayed (>8 weeks of age) or no blood sample collection for EID...
2017: Global Health Action
https://www.readbyqxmd.com/read/28567281/toward-elimination-of-mother-to-child-transmission-of-hiv-in-south-africa-how-best-to-monitor-early-infant-infections-within-the-prevention-of-mother-to-child-transmission-program
#15
Gayle G Sherman, Ahmad Haeri Mazanderani, Peter Barron, Sanjana Bhardwaj, Ronelle Niit, Margaret Okobi, Adrian Puren, Debra J Jackson, Ameena Ebrahim Goga
BACKGROUND: South Africa has utilized three independent data sources to measure the impact of its program for the prevention of mother-to-child transmission (PMTCT) of HIV. These include the South African National Health Laboratory Service (NHLS), the District Health Information System (DHIS), and South African PMTCT Evaluation (SAPMTCTE) surveys. We compare the results of each, outlining advantages and limitations, and make recommendations for monitoring transmission rates as South Africa works toward achieving elimination of mother-to-child transmission (eMTCT)...
June 2017: Journal of Global Health
https://www.readbyqxmd.com/read/28556456/gender-violence-poverty-and-hiv-infection-risk-among-persons-engaged-in-the-sex-industry-cross-national-analysis-of-the-political-economy-of-sex-markets-in-30-european-and-central-asian-countries
#16
A Reeves, S Steele, D Stuckler, M McKee, A Amato-Gauci, J C Semenza
OBJECTIVES: Persons engaged in the sex industry are at greater risk of HIV and other sexually transmitted infections than the general population. One major factor is exposure to higher levels of risky sexual activity. Expanding condom use is a critical prevention strategy, but this requires negotiation with those buying sex, which takes place in the context of cultural and economic constraints. Impoverished individuals who fear violence are more likely to forego condoms. METHODS: Here we tested the hypotheses that poverty and fear of violence are two structural drivers of HIV infection risk in the sex industry...
May 28, 2017: HIV Medicine
https://www.readbyqxmd.com/read/28550120/hiv-1-decreases-nrf2-are-activity-and-phagocytic-function-in-alveolar-macrophages
#17
Bashar S Staitieh, Lingmei Ding, Wendy A Neveu, Paul Spearman, David M Guidot, Xian Fan
Respiratory complications occur frequently in individuals living with human immunodeficiency-1 virus (HIV) infection, and there is evidence that HIV-related oxidative stress impairs alveolar macrophage immune function. We hypothesized that nuclear factor (erythroid-derived 2)-like 2 (Nrf2), a master transcription factor that activates the antioxidant response element (ARE) and regulates antioxidant defenses, has an important role in alveolar macrophage (AMs) immune dysfunction in individuals with HIV infections...
May 26, 2017: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/28541084/the-feasibility-of-automated-eye-tracking-with-the-early-childhood-vigilance-test-of-attention-in-younger-hiv-exposed-ugandan-children
#18
Michael J Boivin, Jonathan Weiss, Ronak Chhaya, Victoria Seffren, Jorem Awadu, Alla Sikorskii, Bruno Giordani
OBJECTIVE: Tobii eye tracking was compared with webcam-based observer scoring on an animation viewing measure of attention (Early Childhood Vigilance Test; ECVT) to evaluate the feasibility of automating measurement and scoring. Outcomes from both scoring approaches were compared with the Mullen Scales of Early Learning (MSEL), Color-Object Association Test (COAT), and Behavior Rating Inventory of Executive Function for preschool children (BRIEF-P). METHOD: A total of 44 children 44 to 65 months of age were evaluated with the ECVT, COAT, MSEL, and BRIEF-P...
May 25, 2017: Neuropsychology
https://www.readbyqxmd.com/read/28539451/reducing-v3-antigenicity-and-immunogenicity-on-soluble-native-like-hiv-1-env-sosip-trimers
#19
Rajesh P Ringe, Gabriel Ozorowski, Kimmo Rantalainen, Weston B Struwe, Katie Matthews, Jonathan L Torres, Anila Yasmeen, Christopher A Cottrell, Thomas J Ketas, Celia C LaBranche, David C Montefiori, Albert Cupo, Max Crispin, Ian A Wilson, Andrew B Ward, Rogier W Sanders, P J Klasse, John P Moore
Native-like trimers of the SOSIP design are being developed as immunogens in human immunodeficiency virus type 1 (HIV-1) vaccine development programs. These trimers display the epitopes for multiple broadly neutralizing antibodies (bNAbs), but can also expose binding sites for some types of non-neutralizing antibodies (non-NAbs). Among the latter are epitopes in the gp120 V3 region that are highly immunogenic when SOSIP trimers are evaluated in animal models. It is presently uncertain whether antibodies against V3 can interfere with the induction of NAbs, but there are good arguments in favor of suppressing such "off-target" immune responses...
May 24, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28538901/sexually-transmitted-infections-and-pro-lives-based-on-a-clinical-report
#20
Paulo Eduardo Neves Ferreira Velho
Physicians are also responsible for the increase in sexually transmitted infections. We report a case of patient inadequately monitored, that shows the importance of physicians to take basic measures with any individual at risk of acquiring such infections. We propose the following mnemonic acrostic: PRO-LIVES (Protection: usual and proper codom use, Responsibility, Other orientations, Laboratory tests -HIV infection, syphilis and B and C hepatitis-, Immunization: B hepatitis vaccination, Various: at least two patients, Ensure: case history and physical examination, Single dose treatment: whenever possible)...
March 2017: Anais Brasileiros de Dermatologia
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