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https://www.readbyqxmd.com/read/28719948/isolation-and-genotyping-of-toxoplasma-gondii-in-brazilian-dogs
#1
Jamille Rodrigues da Silva, Bianca Mendes Maciel, Luana Karla Nogueira de Santana Souza Santos, Fábio Santos Carvalho, Daniele de Santana Rocha, Carlos Wilson Gomes Lopes, George Rêgo Albuquerque
Strains of Toxoplasma gondii in Brazil are highly genetically diverse compared to strains from North America and Europe. Dogs are epidemiologically important because they act as sentinels for T. gondii infections in humans and are good indicators of environmental contamination. The aim of this study was to isolate and genetically characterize T. gondii strains from tissues of naturally infected Brazilian dogs. For this study, 21 blood samples were collected from dogs at the Zoonosis Control Centers of Ilhéus and Itabuna cities, Bahia, Brazil...
June 2017: Korean Journal of Parasitology
https://www.readbyqxmd.com/read/28719863/evaluation-of-platelet-adhesion-and-activation-on-polymers-round-robin-study-to-assess-inter-center-variability
#2
S Braune, C Sperling, M F Maitz, U Steinseifer, J Clauser, B Hiebl, S Krajewski, H P Wendel, F Jung
The regulatory agencies provide recommendations rather than protocols or standard operation procedures for the hemocompatibility evaluation of novel materials e.g. for cardiovascular applications. Thus, there is a lack of specifications with regard to test setups and procedures. As a consequence, laboratories worldwide perform in vitro assays under substantially different test conditions, so that inter-laboratory and inter-study comparisons are impossible. Here, we report about a prospective, randomized and double-blind multicenter trial which demonstrates that standardization of in vitro test protocols allows a reproducible assessment of platelet adhesion and activation from fresh human platelet rich plasma as possible indicators of the thrombogenicity of cardiovascular implants...
July 3, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28719802/cerebral-hypoperfusion-is-not-associated-with-an-increase-in-%C3%AE-amyloid-pathology-in-middle-aged-or-elderly-people
#3
O Hansson, S Palmqvist, H Ljung, T Cronberg, D van Westen, R Smith
INTRODUCTION: It is hypothesized that cerebral hypoperfusion promotes the development of Alzheimer pathology. We therefore studied whether longstanding cerebral hypoperfusion is associated with Alzheimer pathology in nondemented humans. METHODS: Cerebral blood flow and β-amyloid ((18)F-Flutemetamol) positron emission tomography retention were assessed in eleven patients with unilateral occlusion of precerebral arteries resulting in chronic and uneven hypoperfusion...
July 15, 2017: Alzheimer's & Dementia: the Journal of the Alzheimer's Association
https://www.readbyqxmd.com/read/28719653/isolation-of-a-monoclonal-antibody-from-a-phage-display-library-binding-the-rhesus-macaque-mhc-class-i-allomorph-mamu-a1-001
#4
Nathan Holman, Jason T Weinfurter, Trevor R Harsla, Roger W Wiseman, Aaron J Belli, Anthony J Michaels, Keith A Reimann, Robert I DeMars, Matthew R Reynolds
Monoclonal antibodies that bind to human leukocyte antigen (HLA) are useful tools for HLA-typing, tracking donor-recipient chimerisms after bone marrow transplants, and characterizing specific major histocompatibility complexes (MHC) on cell surfaces. Unfortunately, equivalent reagents are not available for rhesus macaques, which are commonly used animal as models in organ transplant and infectious disease research. To address this deficiency, we isolated an antibody that recognizes the common Indian rhesus macaque MHC class I molecule, Mamu-A1*001...
2017: PloS One
https://www.readbyqxmd.com/read/28719652/long-term-follow-up-of-human-t-cell-responses-to-conserved-hiv-1-regions-elicited-by-dna-simian-adenovirus-mva-vaccine-regimens
#5
Nathifa Moyo, Nicola J Borthwick, Edmund G Wee, Silvia Capucci, Alison Crook, Lucy Dorrell, Tomáš Hanke
BACKGROUND: Durability of vaccine-elicited immune responses is one of the key determinants for vaccine success. Our aim is to develop a vaccination strategy against the human immunodeficiency virus type 1 (HIV-1), which induces protective and durable CD8+ T-cell responses. The central theorem of our approach is to focus T cells on highly conserved regions of the HIV-1 proteome and this is achieved through the use of the first-generation conserved vaccine immunogen HIVconsv. This immunogen vectored by plasmid DNA, simian adenovirus and poxvirus MVA was tested in healthy, HIV-1-negative adults in UK and induced high magnitudes of HIVconsv-specific plurifunctional CD8+ T cells capable of in vitro HIV-1 inhibition...
2017: PloS One
https://www.readbyqxmd.com/read/28719385/prevention-of-hemolytic-disease-of-the-fetus-and-newborn-what-have-we-learned-from-animal-models
#6
Yoelys Cruz-Leal, Danielle Marjoram, Alan H Lazarus
PURPOSE OF REVIEW: This review aims to highlight recent advances in our understanding of how anti-red blood cell (RBC) antibodies prevent erythrocyte immunization with an emphasis on new murine models. RECENT FINDINGS: New murine models with clinically relevant human erythrocyte antigens have been used to understand the alloimmunization process and its inhibition. The search to elucidate the mechanism of action of IgG-mediated inhibition of erythrocyte alloimmunization has provided new evidence in support of a potential role for epitope masking, immune deviation and/or antigen modulation in this process...
July 17, 2017: Current Opinion in Hematology
https://www.readbyqxmd.com/read/28719322/case-report-disseminated-talaromyces-penicillium-marneffei-and-mycobacterium-tuberculosis-coinfection-in-a-japanese-patient-with-acquired-immunodeficiency-syndrome
#7
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/28719310/severity-of-pneumonia-in-under-5-year-old-children-from-developing-countries-a-multicenter-prospective-observational-study
#8
Thomas Bénet, Valentina Sanchez Picot, Shally Awasthi, Nitin Pandey, Ashish Bavdekar, Anand Kawade, Annick Robinson, Mala Rakoto-Andrianarivelo, Maryam Sylla, Souleymane Diallo, Graciela Russomando, Wilma Basualdo, Florence Komurian-Pradel, Hubert Endtz, Philippe Vanhems, Gláucia Paranhos-Baccalà, For The Gabriel Network
Pneumonia is the leading cause of death in children. The objectives were to evaluate the microbiological agents linked with hypoxemia in hospitalized children with pneumonia from developing countries, to identify predictors of hypoxemia, and to characterize factors associated with in-hospital mortality. A multicenter, observational study was conducted in five hospitals, from India (Lucknow, Vadu), Madagascar (Antananarivo), Mali (Bamako), and Paraguay (San Lorenzo). Children aged 2-60 months with radiologically confirmed pneumonia were enrolled prospectively...
July 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28719302/a-fatal-hantavirus-pulmonary-syndrome-misdiagnosed-as-dengue-an-investigation-into-the-first-reported-case-in-rio-de-janeiro-state-brazil
#9
Renata Carvalho de Oliveira, Alexandro Guterres, Bernardo Rodrigues Teixeira, Jorlan Fernandes, João Marcos Penna Júnior, Reynaldo de Jesus Oliveira Júnior, Liana Strecht Pereira, João Bosco Júnior, Patrícia Soares Meneguete, Cristina Maria Giordano Dias, Cibele Rodrigues Bonvicino, Paulo Sérgio D'Andrea, Elba Regina Sampaio de Lemos
We report the results of an investigation into a fatal case of hantavirus pulmonary syndrome (HPS) in Rio de Janeiro State, Brazil, where the disease had not been reported previous to 2015. Following the notification of an HPS case, serum samples were collected from the household members and work contacts of the HPS patient and tested for antibody to hantaviruses. Seroprevalence of 22% (10/45) was indicated for hantavirus out of 45 human samples tested. Blood and tissue samples were collected from 72 rodents during fieldwork to evaluate the prevalence of hantavirus infection, by using enzyme-linked immunosorbent assay IgG, and to characterize the rodent hantavirus reservoir(s), by reverse transcription polymerase chain reaction and sequencing...
July 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28719288/evaluation-of-the-protective-effect-of-deoxyribonucleic-acid-vaccines-encoding-granule-antigen-2-and-5-against-acute-toxoplasmosis-in-balb-c-mice
#10
Xiao Teng Ching, Mun Yik Fong, Yee Ling Lau
AbstractToxoplasma gondii infects a broad range of warm-blooded hosts, including humans. Important clinical manifestations include encephalitis in immunocompromised patients as well as miscarriage and fetal damage during early pregnancy. Toxoplasma gondii dense granule antigen 2 and 5 (GRA2 and GRA5) are essential for parasitophorous vacuole development of the parasite. To evaluate the potential of GRA2 and GRA5 as recombinant DNA vaccine candidates, these antigens were cloned into eukaryotic expression vector (pcDNA 3...
June 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28719147/human-immunology-studies-using-organ-donors-impact-of-clinical-variations-on-immune-parameters-in-tissues-and-circulation
#11
D J Carpenter, T Granot, N Matsuoka, T Senda, B V Kumar, J J C Thome, C L Gordon, M Miron, J Weiner, T Connors, H Lerner, A Friedman, T Kato, A D Griesemer, D L Farber
Organ donors are sources of physiologically healthy organs and tissues for life-saving transplantation, and have been recently used for human immunology studies which are typically confined to the sampling of peripheral blood. Donors comprise a diverse population with different causes of death and clinical outcomes during hospitalization, and the effects of such variations on immune parameters in blood and tissues are not known. We present here coordinate analyses of innate and adaptive immune components in blood, lymphoid (bone marrow, spleen, lymph nodes), and mucosal (lungs, intestines) sites from a population of brain-dead organ donors (3-months-93-years; n=291) across eight clinical parameters...
July 18, 2017: American Journal of Transplantation
https://www.readbyqxmd.com/read/28718976/low-density-lipopolyprotein-inhibits-flavivirus-acquisition-in-aedes-aegypti
#12
Z L Wagar, M O Tree, M C Mpoy, M J Conway
Aedes aegypti is the primary vector of a number of human pathogens including dengue virus (DENV) and Zika virus (ZIKV). Ae. aegypti acquires these viruses during the processing of bloodmeals obtained from an infected vertebrate host. Vertebrate blood contains a number of factors that have the potential to modify virus acquisition in the mosquito. Interestingly, low density lipopolyprotein (LDL) levels are decreased during severe DENV infection. Accordingly, we hypothesized that LDL is a modifiable factor that can influence flavivirus acquisition in the mosquito...
July 18, 2017: Insect Molecular Biology
https://www.readbyqxmd.com/read/28718821/tick-haller-s-organ-a-new-paradigm-for-arthropod-olfaction-how-ticks-differ-from-insects
#13
Ann L Carr, Robert D Mitchell Iii, Anirudh Dhammi, Brooke W Bissinger, Daniel E Sonenshine, R Michael Roe
Ticks are the vector of many human and animal diseases; and host detection is critical to this process. Ticks have a unique sensory structure located exclusively on the 1st pairs of legs; the fore-tarsal Haller's organ, not found in any other animals, presumed to function like the insect antennae in chemosensation but morphologically very different. The mechanism of tick chemoreception is unknown. Utilizing next-generation sequencing and comparative transcriptomics between the 1st and 4th legs (the latter without the Haller's organ), we characterized 1st leg specific and putative Haller's organ specific transcripts from adult American dog ticks, Dermacentor variabilis...
July 18, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28718701/occludin-regulates-glucose-uptake-and-atp-production-in-pericytes-by-influencing-amp-activated-protein-kinase-activity
#14
Victor Castro, Marta Skowronska, Jorge Lombardi, Jane He, Neil Seth, Martina Velichkovska, Michal Toborek
Energetic regulation at the blood-brain barrier is critical for maintaining its integrity, transport capabilities, and brain demands for glucose. However, the underlying mechanisms that regulate these processes are still poorly explored. We recently characterized the protein occludin as a NADH oxidase and demonstrated its influence on the expression and activation of the histone deacetylase SIRT-1. Because SIRT-1 works in concert with AMP-activated protein kinase (AMPK) (AMPK), we investigated the impact of occludin on this metabolic switch...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/28718522/t2-prepared-balanced-steady-state-free-precession-bssfp-for-quantifying-whole-blood-oxygen-saturation-at-1-5t
#15
Ana E Rodríguez-Soto, Osheiza Abdulmalik, Michael C Langham, Nadav Schwartz, Hyunyeol Lee, Felix W Wehrli
PURPOSE: To establish a calibration equation to convert human blood T2 to the full range of oxygen saturation levels (HbO2 ) and physiologic hematocrit (Hct) values using a T2 -prepared balanced steady-state free precession sequence (T2 -SSFP) at 1.5T. METHODS: Blood drawn from 10 healthy donors (29.1 ± 3.9 years old) was prepared into samples of varying HbO2 and Hct (n = 79), and imaged using T2 -SSFP sequence at 37°C and interrefocusing interval τ180  = 12 ms...
July 17, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28718368/remodeling-of-extracellular-matrix-of-the-lamina-propria-in-the-uninvolved-human-rectal-mucosa-10-and-20%C3%A2-cm-away-from-the-malignant-tumor
#16
Sanja Z Despotović, Novica M Milićević, Dragoslav P Milošević, Nebojša Despotović, Predrag Erceg, Petar Svorcan, Udo Schumacher, Sebastian Ullrich, Gordana Mihajlović, Dragan Kalem, Srđan Marković, Ivana M Lalić, Aleksandar J Krmpot, Mihailo D Rabasović, Dejan V Pantelić, Svetlana Z Jovanić, Thomas Rösch, Živana Milićević
In recent years, it has been demonstrated that malignancy arises and advances through the molecular interplay between tumor cells and non-malignant elements of the tumor stroma, that is, fibroblasts and extracellular matrix. However, in contrast to the mounting evidence about the role of tumor stroma in the genesis and progression of the malignant disease, there are very few data regarding the uninvolved stromal tissue in the remote surrounding of the tumor. Using the objective morphometric approach in patients with adenocarcinoma, we demonstrate the remodeling of extracellular matrix of the lamina propria in the uninvolved rectal mucosa 10 and 20 cm away from the neoplasm...
July 2017: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
https://www.readbyqxmd.com/read/28718358/an-updated-method-for-the-jugular-catheterization-of-grower-pigs-for-repeated-blood-sampling-following-an-oral-glucose-tolerance-test
#17
Anton M Pluschke, Gregory S Simmons, Helen L Keates, Ranald D A Cameron, Dagong Zhang, John D Wright, Barbara A Williams
Jugular catheterization is a common procedure used under experimental conditions. However, there is considerable variation in the reported techniques, particularly for grower pigs (>40 kg and <60 kg) when larger volumes of blood per sample (>10 mL) are required. This paper provides a complete methodology including the use of current equipment and anaesthetic regimen for grower pigs. This surgical jugular catheterization method was carried out in 30 large white grower pigs. Firstly, the pigs were habituated to human handling for at least two weeks prior to surgery...
August 2017: Laboratory Animals
https://www.readbyqxmd.com/read/28718231/endostatin-concentration-in-plasma-of-healthy-human-volunteers
#18
Inayat Shah, Muhammad Omar Malik, Muhammad Jaffar Khan, Sadia Fatima, Ronald Hugh Baxendale, Syed Hamid Habib
BACKGROUND: Angiogenesis is involved in many cardiovascular and cancerous diseases, including atherosclerosis and is controlled by a fine balance between angiogenic and angiostatic mediators. Endostatin is one of the main angiostatic mediators, and inhibits angiogenesis and prevents progression of atherosclerosis. The available literature shows a broad range of concentrations in relatively small samples of healthy controls and is calculated by using different techniques. This study was aimed to determine the basal endostatin concentration in plasma of healthy volunteers, to fully understand its physiological role...
April 2017: Journal of Ayub Medical College, Abbottabad: JAMC
https://www.readbyqxmd.com/read/28718199/the-clec12a-receptor-marks-human-basophils-potential-implications-for-minimal-residual-disease-detection-in-myeloid-malignancies
#19
Marie Toft-Petersen, Anne Stidsholt Roug, Trine Plesner, Lene Ebbesen, Gordon D Brown, Line Nederby
BACKGROUND: The transmembrane receptor C-type lectin domain family 12, member A (CLEC12A) is known to be highly expressed on monocytes and neutrophils and is a reliable leukemia associated marker in acute myeloid leukemia. Consequently, detailed knowledge of the various normal cell types expressing this receptor is essential. We have observed CLEC12A to be expressed on CD45lowSSClowCD14-CD123+ basophils in peripheral blood (PB) and in the present study, we aimed at verifying this observation and further delineate the CD45lowSSClowCD14-CD123+CLEC12A+ subpopulation...
July 17, 2017: Cytometry. Part B, Clinical Cytometry
https://www.readbyqxmd.com/read/28718025/reduction-of-individual-or-combined-toxicity-of-fumonisin-b1-and-zearalenone-via-dietary-inclusion-of-organo-modified-nano-montmorillonite-in-rats
#20
Aziza A El-Nekeety, Ahmed A El-Kady, Khaled G Abdel-Wahhab, Nabila S Hassan, Mosaad A Abdel-Wahhab
Fusarium mycotoxins are nature environmental contaminants worldwide in animal feed and human food resulting in a serious health risk. The present study aimed to evaluate the potential role of organo-modified nano-montmorillonite (OMNM) against the health risk and the oxidative stress resulted from the exposure of fumonisin (FB1) and zearalenone (ZEN) individually and in combination in rats. Eight groups of female Sprague Dawley rats were treated orally for 3 weeks including the control group, FB1 alone-treated group (50 mg/kg b...
July 17, 2017: Environmental Science and Pollution Research International
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