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İnfection immunology

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https://www.readbyqxmd.com/read/28823115/identification-of-distinctive-clinical-significance-in-hospitalized-patients-with-endoscopic-duodenal-mucosal-lesions
#1
Yeji Han, Hye-Kyung Jung, Ji Young Chang, Chang Mo Moon, Seong-Eun Kim, Ki-Nam Shim, Sung-Ae Jung, Joo-Young Kim, Ji-Yun Bae, Sae-In Kim, Ji-Hyun Lee, Sanghui Park
Background/Aims: Duodenitis is not infrequent finding in patient undergoing endoscopy. However, hospitalized patients have a higher incidence of secondary duodenal mucosal lesions that might be related with inflammatory bowel disease (IBD), cytomegalovirus (CMV) infection, tuberculosis, immunologic disorders, or other rare infections. We aimed to identify clinicopathologic features of duodenal mucosal lesions in hospitalized patients. Methods: All hospitalized patients having duodenal mucosal lesions were identified by endoscopic registration data and pathologic data query from 2011 to 2014...
August 21, 2017: Korean Journal of Internal Medicine
https://www.readbyqxmd.com/read/28822643/genetic-background-impacts-vaccine-induced-reduction-of-pneumococcal-colonization
#2
Kirsten Kuipers, Saskia van Selm, Fred van Opzeeland, Jeroen D Langereis, Lilly M Verhagen, Dimitri A Diavatopoulos, Marien I de Jonge
Vaccination has been one of the most successful strategies to reduce morbidity and mortality caused by respiratory infections. Recent evidence suggests that differences in the host genetic background and environmental factors may contribute to heterogeneity in the immune response to vaccination. During pre-clinical testing, vaccines are often evaluated in a single mouse inbred strain, which may not translate well to the heterogeneous human population. Here, we examined the influence of host genetic background on vaccine-induced protection against pneumococcal colonization in two commonly used inbred mouse strains, i...
August 16, 2017: Vaccine
https://www.readbyqxmd.com/read/28821806/longitudinal-study-of-changes-in-%C3%AE-%C3%AE-t-cells-and-cd4-t-cells-upon-asymptomatic-malaria-infection-in-indonesian-children
#3
Sanne E de Jong, Vera E R Asscher, Linda J Wammes, Aprilianto E Wiria, Firdaus Hamid, Erliyani Sartono, Taniawati Supali, Hermelijn H Smits, Adrian J F Luty, Maria Yazdanbakhsh
Both γδ T cells and CD4(+) T cells have been implicated in immunity to malaria, but their association with natural gain or loss of infection has not been studied before. Therefore, we followed up asymptomatic children living in an area endemic for malaria in Indonesia for 21 months. The percentage of γδ T cells was related to both current and previous infection, with higher percentages in infected than uninfected children and declining after infections resolve. Infected children also had higher levels of Th1 and Th17 cells, lower levels of CD25(Hi) FOXP3(+) regulatory T cells (Tregs), but similar levels of Th2 cells as compared to uninfected children...
August 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28820073/immunomodulatory-role-of-arsenic-on-regulatory-t-cells
#4
Rizwanul Haque, Archana Chaudhary, Nadra Sadaf
Background and objective-Chronic Arsenic (As) exposure continued to be a cause of major problem associated with different kind of diseases including skin problem and different types of cancer. As exposure leads to numerous other pathological conditions that affect millions of people worldwide on a regular basis. It was recently established that As toxicity affects immune system and modulate the function and survival of cells involved in immune regulation. Arsenic trioxide (As2O3) was reported to be an effective apoptosis inducer in a variety of cell types...
August 17, 2017: Endocrine, Metabolic & Immune Disorders Drug Targets
https://www.readbyqxmd.com/read/28819878/aspergillus-bronchitis-in-patients-with-cystic-fibrosis
#5
Claudia Brandt, Jobst Roehmel, Volker Rickerts, Volker Melichar, Nadja Niemann, Carsten Schwarz
Aspergillus fumigatus frequently colonizes the airways of patients with cystic fibrosis (CF) and may cause various severe infections, such as bronchitis. Serological data, sputum dependent markers and longitudinal data of treated cases of Aspergillus bronchitis were evaluated for further description of this infection. This study, which comprises three substudies, aimed to analyze epidemiological data of Aspergillus in CF and the entity of Aspergillus bronchitis. In a first step, data of the German Cystic Fibrosis Registry were used to evaluate the frequency of Aspergillus colonization in patients with CF (n = 2599)...
August 17, 2017: Mycopathologia
https://www.readbyqxmd.com/read/28819653/targeting-cytokines-in-gvhd-therapy
#6
Sandeep Kumar, Hemn Mohammadpour, Xuefang Cao
Transplantation of donor-derived allogeneic hematopoietic cells causes increased survival in patients suffering from various blood cancers and other hematologic and immunologic diseases. However, this health benefit is limited to certain patients. One major complication is graft-versus-host disease (GVHD) that occurs when donor-derived immune cells recognize host cells/tissues as foreign and perpetrate subsequent destruction. Cytokines are a major class of effector molecules that are involved in GVHD pathogenesis...
2017: Journal of Immunology Research and Therapy
https://www.readbyqxmd.com/read/28817724/from-the-animal-house-to-the-field-are-there-consistent-individual-differences-in-immunological-profile-in-wild-populations-of-field-voles-microtus-agrestis
#7
Elena Arriero, Klara M Wanelik, Richard J Birtles, Janette E Bradley, Joseph A Jackson, Steve Paterson, Mike Begon
Inbred mouse strains, living in simple laboratory environments far removed from nature, have been shown to vary consistently in their immune response. However, wildlife populations are typically outbreeding and face a multiplicity of challenges, parasitological and otherwise. In this study we seek evidence of consistent difference in immunological profile amongst individuals in the wild. We apply a novel method in this context, using longitudinal (repeated capture) data from natural populations of field voles, Microtus agrestis, on a range of life history and infection metrics, and on gene expression levels...
2017: PloS One
https://www.readbyqxmd.com/read/28817375/effect-of-maternal-antibody-transfer-on-antibody-dynamics-and-control-of-porcine-circovirus-type-2-infection-in-offspring
#8
Cheryl M T Dvorak, Brian J Payne, Jessica L Seate, Michael P Murtaugh
Sow immunity plays an important role in preventing viral infection and disease in newborn piglets. Vertical transmission of porcine circovirus type 2 (PCV2) may perpetuate porcine circovirus associated disease (PCVAD) in newborn and growing pigs. Hence, the immunological effects of maternal immunoglobulin transfer of PCV2-specific antibodies on PCV2 viremia and immune response in piglets in commercial swine herds were evaluated. Sow vaccination has been shown to reduce viral shedding and viremia, and increases the neutralizing antibody (NA) titers...
August 17, 2017: Viral Immunology
https://www.readbyqxmd.com/read/28815848/inflammation-and-fertility-in-the-mare
#9
REVIEW
M Christoffersen, Mht Troedsson
A transient uterine inflammation post-breeding is a normal physiological reaction in the mare, and it is believed that the inflammatory response is necessary to eliminate bacteria and excess spermatozoa introduced into the uterine lumen. A tight balance between multiple pro- and anti-inflammatory factors is required for resolving the breeding-induced inflammation within 24-36 hr in the reproductively healthy mare, whereas a subpopulation of mares is susceptible to development of a persistent infection that can interfere with fertility...
August 2017: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/28814661/hdac-inhibition-induces-hiv-1-protein-and-enables-immune-based-clearance-following-latency-reversal
#10
Guoxin Wu, Michael Swanson, Aarthi Talla, Donald Graham, Julie Strizki, Daniel Gorman, Richard Jo Barnard, Wade Blair, Ole S Søgaard, Martin Tolstrup, Lars Østergaard, Thomas A Rasmussen, Rafick-Pierre Sekaly, Nancie M Archin, David M Margolis, Daria J Hazuda, Bonnie J Howell
Promising therapeutic approaches for eradicating HIV include transcriptional activation of provirus from latently infected cells using latency-reversing agents (LRAs) and immune-mediated clearance to purge reservoirs. Accurate detection of cells capable of producing viral antigens and virions, and the measurement of clearance of infected cells, is essential to assessing therapeutic efficacy. Here, we apply enhanced methodology extending the sensitivity limits for the rapid detection of subfemtomolar HIV gag p24 capsid protein in CD4+ T cells from ART-suppressed HIV+ individuals, and we show viral protein induction following treatment with LRAs...
August 17, 2017: JCI Insight
https://www.readbyqxmd.com/read/28814660/sustained-immune-tolerance-induction-in-enzyme-replacement-therapy-treated-crim-negative-patients-with-infantile-pompe-disease
#11
Zoheb B Kazi, Ankit K Desai, Kathryn L Berrier, R Bradley Troxler, Raymond Y Wang, Omar A Abdul-Rahman, Pranoot Tanpaiboon, Nancy J Mendelsohn, Eli Herskovitz, David Kronn, Michal Inbar-Feigenberg, Catherine Ward-Melver, Michelle Polan, Punita Gupta, Amy S Rosenberg, Priya S Kishnani
BACKGROUND: Cross-reactive immunological material-negative (CRIM-negative) infantile Pompe disease (IPD) patients develop an immune response against enzyme replacement therapy (ERT) with alglucosidase alfa that nullifies ERT efficacy. Prophylactic immune tolerance induction (ITI) with rituximab, methotrexate, and IVIG successfully prevents development of deleterious rhGAA IgG antibodies; however, safety, likelihood of success, and long-term efficacy of ITI in a larger cohort remain unknown...
August 17, 2017: JCI Insight
https://www.readbyqxmd.com/read/28814515/fdg-uptake-in-lymphoid-tissue-serves-as-a-predictor-of-disease-outcome-in-the-nonhuman-primate-model-of-monkeypox-infection
#12
Julie Dyall, Reed F Johnson, Svetlana Chefer, Christopher Leyson, David Thomasson, Jurgen Seidel, Dan R Ragland, Russell Byrum, Catherine Jett, Jennifer A Cann, Marisa St Claire, Elaine Jagoda, Richard C Reba, Dima Hammoud, Joseph E Blaney, Peter B Jahrling
Real-time bioimaging of infectious disease processes may aid countermeasure development and lead to an improved understanding of pathogenesis. However, few studies have identified biomarkers for monitoring infections using in vivo imaging. Previously, we demonstrated that positron emission tomography/computed tomography (PET/CT) imaging with [(18)F]-fluorodeoxyglucose (FDG) can monitor monkeypox disease progression in vivo in nonhuman primates (NHPs). In this study, we investigated [(18)F]-FDG-PET/CT imaging of immune processes in lymphoid tissues to identify patterns of inflammation in the monkepox NHP model and to determine the value of [(18)F]-FDG-PET/CT as a biomarker for disease and treatment outcomes...
August 16, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28812548/bacteroidales-recruit-il-6-producing-intraepithelial-lymphocytes-in-the-colon-to-promote-barrier-integrity
#13
K A Kuhn, H M Schulz, E H Regner, E L Severs, J D Hendrickson, G Mehta, A K Whitney, D Ir, N Ohri, C E Robertson, D N Frank, E L Campbell, S P Colgan
Interactions between the microbiota and distal gut are important for the maintenance of a healthy intestinal barrier; dysbiosis of intestinal microbial communities has emerged as a likely contributor to diseases that arise at the level of the mucosa. Intraepithelial lymphocytes (IELs) are positioned within the epithelial barrier, and in the small intestine they function to maintain epithelial homeostasis. We hypothesized that colon IELs promote epithelial barrier function through the expression of cytokines in response to interactions with commensal bacteria...
August 16, 2017: Mucosal Immunology
https://www.readbyqxmd.com/read/28811631/development-of-a-primary-human-co-culture-model-of-inflamed-airway-mucosa
#14
Lael M Yonker, Hongmei Mou, Kengyeh K Chu, Michael A Pazos, Huimin Leung, Dongyao Cui, Jinhyeob Ryu, Rhianna M Hibbler, Alexander D Eaton, Tim N Ford, J R Falck, T Bernard Kinane, Guillermo J Tearney, Jayaraj Rajagopal, Bryan P Hurley
Neutrophil breach of the mucosal surface is a common pathological consequence of infection. We present an advanced co-culture model to explore neutrophil transepithelial migration utilizing airway mucosal barriers differentiated from primary human airway basal cells and examined by advanced imaging. Human airway basal cells were differentiated and cultured at air-liquid interface (ALI) on the underside of 3 µm pore-sized transwells, compatible with the study of transmigrating neutrophils. Inverted ALIs exhibit beating cilia and mucus production, consistent with conventional ALIs, as visualized by micro-optical coherence tomography (µOCT)...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28811492/interferon-alpha-treatment-rapidly-clears-hepatitis-e-virus-infection-in-humanized-mice
#15
Martijn D B van de Garde, Suzan D Pas, Gertine W van Oord, Lucio Gama, Youkyung Choi, Robert A de Man, Andre Boonstra, Thomas Vanwolleghem
Antiviral treatment options for chronic Hepatitis E Virus (HEV) infections are limited and immunological determinants of viral persistence remain largely unexplored. We studied the antiviral potency of pegylated interferon-α (pegIFNα) against HEV infections in humanized mice and modelled intrahepatic interferon stimulated gene (ISG) responses. Human gene expression levels in humanized mouse livers were analyzed by qPCR and Nanostring. Human CXCL10 was measured in mouse serum. HEV genotype 3 (gt3) infections were cleared from liver and feces within 8 pegIFNα doses in all mice and relapsed after a single pegIFNα injection in only half of treated animals...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28807415/the-impact-of-seismic-air-gun-exposure-on-the-haemolymph-physiology-and-nutritional-condition-of-spiny-lobster-jasus-edwardsii
#16
Quinn P Fitzgibbon, Ryan D Day, Robert D McCauley, Cedric J Simon, Jayson M Semmens
There is a critical knowledge gap regarding the impacts of seismic air gun signals on the physiology of adult crustaceans. We conducted four controlled field experiments to examine the impact of seismic acoustic signals on spiny lobster, Jasus edwardsii. Seismic air gun exposure suppressed total haemocyte count (THC) for up to 120days post-exposure, suggesting a chronic negative impact of immune competency. THC levels after 365days post-exposure, were elevated two fold, potentially indicating an immune response to infection...
August 11, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28807291/toxocara-canis-analysis-of-the-kinetics-of-antigen-release-and-antibody-production-in-an-in-vivo-model-for-the-detection-of-past-or-present-infection
#17
Aarón Rodríguez-Caballero, Mario Noé Martínez-Gordillo, Silvia Caballero-Salazar, Yadira Rufino-González, Martha Ponce-Macotela
Worldwide, Toxocara canis is an important zoonotic nematode of public health concern. This soil-transmitted helminth causes visceral larva and ocular larva migrans in paratenic hosts. The detection of T. canis larva migrans is complicated because current immunological tests detect only IgG antibodies, which can cross-react with antigens from other parasites and cannot distinguish between the past and present infection. Analysis of antigen release and antibody production could help improve the detection of larva migrans...
August 30, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28805315/a-comparison-of-clinical-and-immunologic-phenotypes-in-familial-and-sporadic-forms-of-common-variable-immunodeficiency
#18
Amir Valizadeh, Reza Yazdani, Gholamreza Azizi, Hassan Abolhassani, Asghar Aghamohammadi
Common variable immunodeficiency (CVID) is the most frequent symptomatic primary immunodeficiency disease and its prevalence varies significantly among different population. Minority of CVID patients present a familial aggregation suggesting a higher probability of heritable genetic defects. A total of 235 registered CVID patients were evaluated in this cohort study. Familial and sporadic patients were stratified and demographic information, clinical records, laboratory and molecular data were compared among these two groups of patients...
August 11, 2017: Scandinavian Journal of Immunology
https://www.readbyqxmd.com/read/28804700/abridged-version-of-the-awmf-guideline-for-the-medical-clinical-diagnostics-of-indoor-mould-exposure-s2k-guideline-of-the-german-society-of-hygiene-environmental-medicine-and-preventive-medicine-ghup-in-collaboration-with-the-german-association-of-allergists
#19
Gerhard A Wiesmüller, Birger Heinzow, Ute Aurbach, Karl-Christian Bergmann, Albrecht Bufe, Walter Buzina, Oliver A Cornely, Steffen Engelhart, Guido Fischer, Thomas Gabrio, Werner Heinz, Caroline E W Herr, Jörg Kleine-Tebbe, Ludger Klimek, Martin Köberle, Herbert Lichtnecker, Thomas Lob-Corzilius, Rolf Merget, Norbert Mülleneisen, Dennis Nowak, Uta Rabe, Monika Raulf, Hans Peter Seidl, Jens-Oliver Steiß, Regine Szewszyk, Peter Thomas, Kerttu Valtanen, Julia Hurraß
This article is an abridged version of the AWMF mould guideline "Medical clinical diagnostics of indoor mould exposure" presented in April 2016 by the German Society of Hygiene, Environmental Medicine and Preventive Medicine (Gesellschaft für Hygiene, Umweltmedizin und Präventivmedizin, GHUP), in collaboration with the above-mentioned scientific medical societies, German and Austrian societies, medical associations and experts. Indoor mould growth is a potential health risk, even if a quantitative and/or causal relationship between the occurrence of individual mould species and health problems has yet to be established...
2017: Allergo Journal International
https://www.readbyqxmd.com/read/28804486/first-association-of-interleukin-12-receptor-beta-1-deficiency-with-sj%C3%A3-gren-s-syndrome
#20
Georgios Sogkas, Faranaz Atschekzei, Vivien Schacht, Christian von Falck, Alexandra Jablonka, Roland Jacobs, Matthias Stoll, Torsten Witte, Reinhold E Schmidt
INTRODUCTION: Interleukin 12 receptor beta 1 (IL12Rβ1) deficiency is a primary immunodeficiency resulting mainly in susceptibility to opportunistic infection by non-tuberculous, environmental mycobacteria and severe infection caused by Salmonella spp. Till now, less than 300 patients with IL12Rβ1 deficiency have been reported. Among them, only three have been described to develop autoimmunity. CASE PRESENTATION: We present the case of a 50-year-old male with IL12Rβ1 deficiency due to compound heterozygosity [c...
2017: Frontiers in Immunology
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