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https://www.readbyqxmd.com/read/28938026/hiv-exposed-seronegative-hesn-compared-to-hiv-infected-individuals-have-higher-frequencies-of-telomeric-killer-immunoglobulin-like-receptor-kir-b-motifs-contribution-of-kir-b-motif-encoded-genes-to-nk-cell-responsiveness
#1
Elise Jackson, Cindy Xinyu Zhang, Zahra Kiani, Irene Lisovsky, Benjamin Tallon, Alexa Del Corpo, Louise Gilbert, Julie Bruneau, Réjean Thomas, Pierre Côté, Benoit Trottier, Roger LeBlanc, Danielle Rouleau, Cécile Tremblay, Christos M Tsoukas, Jean-Pierre Routy, Xiaoyan Ni, Tsoarello Mabanga, Nicole F Bernard
Previously, we showed that Killer Immunoglobulin-like Receptor (KIR)3DS1 homozygotes (hmz) are more frequent in HIV exposed seronegative (HESN) than in recently HIV infected (HIV+) individuals. KIR3DS1 encodes an activating Natural Killer (NK) cell receptor (NKR). The link between KIR genotype and HIV outcomes likely arises from the function that NK cells acquire through expression of particular NKRs. An initial screen of 97 HESN and 123 HIV+ subjects for the frequency of KIR region gene carriage observed between-group differences for several telomeric KIR region loci...
2017: PloS One
https://www.readbyqxmd.com/read/28934432/intestinal-damage-and-inflammatory-biomarkers-in-human-immunodeficiency-virus-hiv-exposed-and-hiv-infected-zimbabwean-infants
#2
Andrew J Prendergast, Bernard Chasekwa, Sandra Rukobo, Margaret Govha, Kuda Mutasa, Robert Ntozini, Jean H Humphrey
Background: Disease progression is rapid in human immunodeficiency virus (HIV)-infected infants. Whether intestinal damage and inflammation underlie mortality is unknown. Methods: We measured plasma intestinal fatty acid binding protein (I-FABP), soluble CD14 (sCD14), interleukin 6 (IL-6), and C-reactive protein (CRP) at 6 weeks and 6 months of age in 272 HIV-infected infants who either died (cases) or survived (controls), and in 194 HIV-exposed uninfected (HEU) and 197 HIV-unexposed infants...
September 15, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28932223/editorial-immune-mechanisms-underlying-the-increased-morbidity-and-mortality-of-hiv-exposed-uninfected-heu-children
#3
EDITORIAL
Tessa Goetghebuer, Sarah L Rowland-Jones, Tobias R Kollmann
No abstract text is available yet for this article.
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28930847/guillain-barr%C3%A3-like-axonal-polyneuropathy-associated-with-toscana-virus-infection-a-case-report
#4
Eugenia Rota, Nicola Morelli, Paolo Immovilli, Paola De Mitri, Donata Guidetti
RATIONALE: Numerous cases of post-infectious Guillain-Barré syndrome (GBS) have been reported in the literature. Toscana virus (TOSV) is an arthropod-borne emerging pathogen in the Mediterranean area. PATIENT CONCERNS: A 40-year-old male patient was admitted to hospital for acute facial weakness, associated to numbness paraesthesias at lower and upper limbs. The neurological examination revealed facial diplegia and reduced tendon reflexes. The nerve conduction studies documented an acute motor and sensory axonal neuropathy (AMSAN); the lumbar puncture detected albuminocytologic dissociation...
September 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28926411/lower-mitochondrial-dna-and-altered-mitochondrial-fuel-metabolism-in-hiv-exposed-uninfected-infants-in-cameroon
#5
Jennifer Jao, Kathleen M Powis, Brian Kirmse, Chunli Yu, Fanny Epie, Emmanuel Nshom, Elaine J Abrams, Rhoda S Sperling, Derek Leroith, Mitchell E Geffner, Irwin J Kurland, Hélène C F Côté
OBJECTIVE: Evaluate blood mitochondrial DNA (mtDNA) content in HIV/antiretroviral (ARV)-exposed uninfected (HEU) vs. HIV-unexposed uninfected (HUU) infants and investigate differences in mitochondrial-related metabolites by exposure group. DESIGN: We enrolled a prospective cohort of HIV-infected and -uninfected pregnant woman/infant pairs in Cameroon. METHODS: Dried blood spot mtDNA:nuclear DNA ratio was measured by monochrome multiplex qPCR in HEU infants exposed to in utero ARVs and postnatal zidovudine (HEU-Z) or nevirapine (HEU-N), and in HUU infants at 6 weeks of life...
September 18, 2017: AIDS
https://www.readbyqxmd.com/read/28926409/effects-of-concurrent-exposure-to-antiretrovirals-and-cotrimoxazole-prophylaxis-among-hiv-exposed-uninfected-infants
#6
Alexander C Ewing, Caroline C King, Jeffrey B Wiener, Charles S Chasela, Michael G Hudgens, Debbie Kamwendo, Gerald Tegha, Mina C Hosseinipour, Denise J Jamieson, Charles Van der Horst, Athena P Kourtis
BACKGROUND: Given the potential of Cotrimoxazole preventive therapy (CPT) to prevent bacterial and malarial infections in HIV exposed, uninfected (HEU) infants, it is important to evaluate the effects of its concurrent use with ARV agents that have overlapping toxicity profiles. METHODS: We used data from the Breastfeeding, Antiretrovirals and Nutrition-BAN study (2004-2010) to evaluate the association of CPT and ARV with hematologic measures (hemoglobin, neutrophil, and alanine aminotransferase levels) from 6 to 48 weeks of age in 2,006 HEU infants in Lilongwe, Malawi...
September 18, 2017: AIDS
https://www.readbyqxmd.com/read/28913617/fingolimod-induces-neuronal-specific-gene-expression-with-potential-neuroprotective-outcomes-in-maturing-neuronal-progenitor-cells-exposed-to-hiv
#7
Rebeca Geffin, Ricardo Martinez, Alicia de Las Pozas, Biju Issac, Micheline McCarthy
Fingolimod (FTY720), a structural analogue of sphingosine, targets sphingosine-1-phosphate receptor signaling and is currently an immunomodulatory therapy for multiple sclerosis. Fingolimod accesses the central nervous system (CNS) where its active metabolite, fingolimod phosphate (FTY720-P), has pleotropic neuroprotective effects in an inflammatory microenvironment. To investigate potential neuronal-specific mechanisms of fingolimod neuroprotection, we cultured the human neuronal progenitor cell line, hNP1, in differentiation medium supplemented with HIV- or Mock-infected supernatants, with or without FTY720-P...
September 14, 2017: Journal of Neurovirology
https://www.readbyqxmd.com/read/28912368/neurodevelopment-of-hiv-exposed-and-hiv-unexposed-uninfected-children-at-24-months
#8
Sumona Chaudhury, Paige L Williams, Gloria K Mayondi, Jean Leidner, Penny Holding, Vicki Tepper, Sharon Nichols, Jane Magetse, Maureen Sakoi, Kebaiphe Moabi, Joseph Makhema, Charlotte Mdluli, Haruna Jibril, George R Seage, Betsy Kammerer, Shahin Lockman
BACKGROUND: We sought to determine if HIV-exposed uninfected (HEU) children had worse neurodevelopmental outcomes at 24 months compared with HIV-unexposed uninfected (HUU) children in Botswana. METHODS: HIV-infected and uninfected mothers enrolled in a prospective observational study ("Tshipidi") in Botswana from May 2010 to July 2012. Child neurodevelopment was assessed at 24 months with the Bayley Scales of Infant and Toddler Development, Third Edition (Bayley-III: cognitive, gross motor, fine motor, expressive language, and receptive language domains) and the Development Milestones Checklist (DMC), a caregiver-completed questionnaire (locomotor, fine motor, language and personal-social domains)...
September 14, 2017: Pediatrics
https://www.readbyqxmd.com/read/28902703/the-effect-of-schooling-on-age-disparate-relationships-and-number-of-sexual-partners-among-young-women-in-rural-south-africa-enrolled-in-hptn-068
#9
Marie C D Stoner, Jessie K Edwards, William C Miller, Allison E Aiello, Carolyn T Halpern, Aimée Julien, Amanda Selin, James P Hughes, Jing Wang, F Xavier Gomez-Olive, Ryan G Wagner, Catherine MacPhail, Kathleen Kahn, Audrey Pettifor
BACKGROUND: Attending school may have a strong preventative association with sexually transmitted infections among young women, but the mechanism for this relationship is unknown. One hypothesis is that students who attend school practice safer sex with fewer partners, establishing safer sexual networks that make them less exposed to infection. SETTING: We used longitudinal data from a randomized controlled trial of young women age 13-20 in the Bushbuckridge district, South Africa, to determine if the percentage of school days attended, school dropout and grade repetition are associated with having a partner five or more years older (age-disparate) and with the number of sexual partners in the previous 12 months...
September 11, 2017: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/28900043/a-natural-ligand-for-the-orphan-receptor-gpr15-modulates-lymphocyte-recruitment-to-epithelia
#10
Thomas Suply, Sébastien Hannedouche, Nathalie Carte, Jianping Li, Bianka Grosshans, Michael Schaefer, Layla Raad, Valérie Beck, Solange Vidal, Agnès Hiou-Feige, Noémie Beluch, Samuel Barbieri, Johann Wirsching, Nadine Lageyre, Frank Hillger, Corinne Debon, Janet Dawson, Philip Smith, Vincent Lannoy, Michel Detheux, Francis Bitsch, Rocco Falchetto, Tewis Bouwmeester, Jeffrey Porter, Birgit Baumgarten, Keith Mansfield, José M Carballido, Klaus Seuwen, Frédéric Bassilana
GPR15 is an orphan G protein-coupled receptor (GPCR) that is found in lymphocytes. It functions as a co-receptor of simian immunodeficiency virus and HIV-2 and plays a role in the trafficking of T cells to the lamina propria in the colon and to the skin. We describe the purification from porcine colonic tissue extracts of an agonistic ligand for GPR15 and its functional characterization. In humans, this ligand, which we named GPR15L, is encoded by the gene C10ORF99 and has some features similar to the CC family of chemokines...
September 12, 2017: Science Signaling
https://www.readbyqxmd.com/read/28898704/interpretation-of-indeterminate-hiv-1-pcr-results-are-influenced-by-changing-vertical-transmission-prevention-regimens
#11
Jean Maritz, Jayshree Narvin Maharaj, Mark Frederic Cotton, Wolfgang Preiser
BACKGROUND: Suppression of HIV by antiretroviral drugs may be one of the reasons that indeterminate HIV-1 PCR results are obtained from testing HIV-exposed infants. This complicates the early identification of infected infants, potentially delaying initiating treatment early. There is uncertainty as to how different vertical HIV transmission prevention regimens (VTP) affect the rate and predictive value of indeterminate PCR results. OBJECTIVES: To investigate rates of indeterminate PCR results, outcomes of subsequent samples and the predictive value of an indeterminate PCR for a later positive result in the setting of intensifying VTP in the Western Cape province of South Africa...
September 9, 2017: Journal of Clinical Virology: the Official Publication of the Pan American Society for Clinical Virology
https://www.readbyqxmd.com/read/28895059/central-nervous-system-penetrating-antiretrovirals-impair-energetic-reserve-in-striatal-nerve-terminals
#12
Kelly L Stauch, Katy Emanuel, Benjamin G Lamberty, Brenda Morsey, Howard S Fox
The use of antiretroviral (ARV) drugs with central nervous system (CNS) penetration effectiveness (CPE) may be useful in the treatment of HIV-associated neurocognitive disorder (HAND) as well as targeting a CNS reservoir in strategies to achieve a functional cure for HIV. However, increased cognitive deficits are linked to at least one of these drugs (efavirenz). As mitochondrial dysfunction has been found with a number of ARVs, and as such can affect neuronal function, the objective of this study was to assess the effects of ARV with high CPE for toxicological profiles on presynaptic nerve terminal energy metabolism...
September 11, 2017: Journal of Neurovirology
https://www.readbyqxmd.com/read/28893304/preventing-hiv-infection-without-targeting-the-virus-how-reducing-hiv-target-cells-at-the-genital-tract-is-a-new-approach-to-hiv-prevention
#13
REVIEW
Julie Lajoie, Lucy Mwangi, Keith R Fowke
For over three decades, HIV infection has had a tremendous impact on the lives of individuals and public health. Microbicides and vaccines studies have shown that immune activation at the genital tract is a risk factor for HIV infection. Furthermore, lower level of immune activation, or what we call immune quiescence, has been associated with a lower risk of HIV acquisition. This unique phenotype is observed in highly-exposed seronegative individuals from different populations including female sex workers from the Pumwani cohort in Nairobi, Kenya...
September 12, 2017: AIDS Research and Therapy
https://www.readbyqxmd.com/read/28893275/unlocking-hiv-1-env-implications-for-antibody-attack
#14
REVIEW
Jonathan Richard, Shilei Ding, Andrés Finzi
Collective evidence supporting a role of Antibody-Dependent Cell-Mediated Cytotoxicity (ADCC) in controlling HIV-1 transmission and disease progression emerged in the last few years. Non-neutralizing antibodies (nnAbs) recognizing conserved CD4-induced epitopes on Env and able to mediate potent ADCC against HIV-1-infected cells exposing Env in its CD4-bound conformation have been shown to be present in some RV144 vaccinees and most HIV-1-infected individuals. HIV-1 evolved sophisticated strategies to decrease exposure of this Env conformation by downregulating CD4 and by limiting the overall amount of cell-surface Env...
September 12, 2017: AIDS Research and Therapy
https://www.readbyqxmd.com/read/28887751/hiv-prevention-among-women-who-use-substances-and-report-sex-work-risk-groups-identified-among-south-african-women
#15
Wendee M Wechsberg, Courtney Peasant, Tracy Kline, William A Zule, Jacqueline Ndirangu, Felicia A Browne, Colby Gabel, Charles van der Horst
This cross-sectional study presents baseline data from women (n = 641) in a community-based randomized trial in Pretoria, South Africa. Women were eligible if they reported recent alcohol or other drug (AOD) use and condomless sex. Latent class analyses were conducted separately for those who reported sex work and those who did not. Among those who reported sex work, a Risky Sex class (n = 72, 28%) and Low Sexual Risk class (n = 190, 73%) emerged. Those in the Risky Sex class were more likely to report that their last episode of sexual intercourse was with their boyfriend (vs...
September 8, 2017: AIDS and Behavior
https://www.readbyqxmd.com/read/28886715/peroxisome-proliferator-activated-receptor-gamma-potential-molecular-therapeutic-target-for-hiv-1-associated-brain-inflammation
#16
Amila Omeragic, Md Tozammel Hoque, U-Yeong Choi, Reina Bendayan
BACKGROUND: Despite the use of combination antiretroviral therapy for the treatment of HIV-1 infection, cognitive impairments remain prevalent due to persistent viral replication and associated brain inflammation. Primary cellular targets of HIV-1 in the brain are macrophages, microglia, and to a certain extent astrocytes which in response to infection release inflammatory markers, viral proteins [i.e., glycoprotein 120 (gp120)] and exhibit impaired glutamate uptake. Peroxisome proliferator-activated receptors (PPARs) are members of the nuclear receptor superfamily of ligand-activated transcription factors...
September 8, 2017: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/28886165/low-mother-to-child-hiv-transmission-rate-but-high-loss-to-follow-up-among-mothers-and-babies-in-mandalay-myanmar-a-cohort-study
#17
Khine Wut Yee Kyaw, Myo Minn Oo, Nang Thu Thu Kyaw, Khaing Hnin Phyo, Thet Ko Aung, Theingi Mya, Nilar Aung, Htun Nyunt Oo, Petros Isaakidis
INTRODUCTION: Loss-to-follow-up (LTFU) throughout the Prevention of Mother-To-Child Transmission (PMTCT) cascade remains one of the major threats to the success of PMTCT programs. In this study, we aimed to determine the mother-to-child transmission rate in a programmatic setting and to determine factors associated with LTFU among enrolled mothers and unfavorable outcomes among HIV-exposed babies which includes being HIV positive, death and LTFU. METHODS: A retrospective cohort study reviewing routinely collected data in an Integrated HIV care program, Mandalay, Myanmar in June 2016...
2017: PloS One
https://www.readbyqxmd.com/read/28884524/hiv-transmission-and-retention-in-care-among-hiv-exposed-children-enrolled-in-malawi-s-prevention-of-mother-to-child-transmission-programme
#18
Andreas D Haas, Joep J van Oosterhout, Lyson Tenthani, Andreas Jahn, Marcel Zwahlen, Malango T Msukwa, Mary-Ann Davies, Kali Tal, Nozgechi Phiri, Adrian Spoerri, Frank Chimbwandira, Matthias Egger, Olivia Keiser
INTRODUCTION: In Malawi, HIV-infected pregnant and breastfeeding women are offered lifelong antiretroviral therapy (ART) regardless of CD4 count or clinical stage (Option B+). Their HIV-exposed children are enrolled in the national prevention of mother-to-child transmission (PMTCT) programme, but many are lost to follow-up. We estimated the cumulative incidence of vertical HIV transmission, taking loss to follow-up into account. METHODS: We abstracted data from HIV-exposed children enrolled into care between September 2011 and June 2014 from patient records at 21 health facilities in central and southern Malawi...
September 4, 2017: Journal of the International AIDS Society
https://www.readbyqxmd.com/read/28883971/vaccination-of-hiv-infected-pregnant-women-implications-for-protection-of-their-young-infants
#19
REVIEW
Ziyaad Dangor, Marta C Nunes, Gaurav Kwatra, Sanjay G Lala, Shabir A Madhi
BACKGROUND: The prevention of mother to child transmission of HIV has resulted in reduced burden of pediatric HIV-infection, but the prevalence of maternal HIV infection remains high in sub-Saharan African countries. HIV-exposed-uninfected infants have an increased risk of morbidity and mortality due to infectious diseases than HIV-unexposed infants, particularly during the first six months of life, which in part might be due to lower levels of pathogen-specific protective antibodies acquired transplacentally from their mothers...
2017: Tropical Diseases, Travel Medicine and Vaccines
https://www.readbyqxmd.com/read/28874783/hyperactive-tgf-%C3%AE-signaling-in-smooth-muscle-cells-exposed-to-hiv-protein-s-and-cocaine-role-in-pulmonary-vasculopathy
#20
Pranjali Dalvi, Himanshu Sharma, Tomara Konstantinova, Miles Sanderson, Amy O' Brien-Ladner, Navneet K Dhillon
We earlier demonstrated synergistic increase in the proliferation of pulmonary smooth muscle cells on exposure to HIV-proteins and/or cocaine due to severe down-modulation of bone morphogenetic protein receptor (BMPR) axis: the anti-proliferative arm of TGF-β super family of receptors. Here, now we demonstrate the effect of HIV-Tat and cocaine on the proliferative TGF-β signaling cascade. We observed a significant increase in the secretion of TGF-β1 ligand along with enhanced protein expression of TGFβ Receptor (TGFβR)-1, TGFβR-2 and phosphorylated SMAD2/3 in human pulmonary arterial smooth muscle cells on treatment with cocaine and Tat...
September 5, 2017: Scientific Reports
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