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Frontiers in Immunology

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https://www.readbyqxmd.com/read/27920779/functional-versatility-of-agy-serine-codons-in-immunoglobulin-variable-region-genes
#1
Thiago Detanico, Matthew Phillips, Lawrence J Wysocki
In systemic autoimmunity, autoantibodies directed against nuclear antigens (Ags) often arise by somatic hypermutation (SHM) that converts AGT and AGC (AGY) Ser codons into Arg codons. This can occur by three different single-base changes. Curiously, AGY Ser codons are far more abundant in complementarity-determining regions (CDRs) of IgV-region genes than expected for random codon use or from species-specific codon frequency data. CDR AGY codons are also more abundant than TCN Ser codons. We show that these trends hold even in cartilaginous fishes...
2016: Frontiers in Immunology
https://www.readbyqxmd.com/read/27920778/the-dynamics-of-t-and-b-cells-in-lymph-node-during-chronic-hiv-infection-tfh-and-hiv-unhappy-dance-partners
#2
REVIEW
Jung Joo Hong, Kyu-Tae Chang, Francois Villinger
Although the dynamics of germinal center (GC) formation, follicular helper T (TFH) cell recruitment to B cell follicles within lymphoid organs, and changes of lymphoid tissue architecture in HIV/SIV infection have been documented, the underlying immunopathology remains unclear. Here, we summarize what is known regarding the kinetics of TFH cells and GC B cells during the course of infection as well as the potential immunopathological features associated with structural changes in the lymphoid compartment. This review also explores the implications of cell dynamics in the formation and maintenance of viral reservoirs in hyperplastic follicles of secondary lymphoid organs before and after viral suppressive antiretroviral therapy...
2016: Frontiers in Immunology
https://www.readbyqxmd.com/read/27920777/physical-interaction-of-t-cells-with-dendritic-cells-is-not-required-for-the-immunomodulatory-effects-of-the-edible-mushroom-agaricus-subrufescens
#3
Ruud H P Wilbers, Lotte B Westerhof, Jan van de Velde, Geert Smant, Debbie R van Raaij, Anton S M Sonnenberg, Jaap Bakker, Arjen Schots
Mushrooms are well known for their immunomodulating capacities. However, little is known about how mushroom-stimulated dendritic cells (DCs) affect T cells. Therefore, we investigated the effect of mushroom compounds derived from seven edible mushroom species on DCs, their fate in DCs, and the effect of the mushroom-stimulated DCs on T cells. Each mushroom species stimulated DCs in a different manner as was revealed from the DC's cytokine response. Assessing DC maturation revealed that only one mushroom species, Agaricus subrufescens, induced complete DC maturation...
2016: Frontiers in Immunology
https://www.readbyqxmd.com/read/27920776/immunodetection-of-nets-in-paraffin-embedded-tissue
#4
Volker Brinkmann, Ulrike Abu Abed, Christian Goosmann, Arturo Zychlinsky
The pathogenic potential of neutrophil extracellular traps (NETs) was recently described, and their detection in tissue could serve as a prognostic marker. NETs are delicate and filigree structures; hence good tissue preservation is essential for their detection. Indeed, analysis of paraffin-embedded tissue has proven superior to the study of cryo sections. Though, under favorable conditions, the presence of NETs can be detected in tissue sections stained with histological dyes, definitive identification of NETs needs the colocalization of immunofluorescent signals for both nuclear and granular (or cytoplasmic) NET components...
2016: Frontiers in Immunology
https://www.readbyqxmd.com/read/27920775/human-papillomavirus-downregulates-the-expression-of-ifitm1-and-ripk3-to-escape-from-ifn%C3%AE-and-tnf%C3%AE-mediated-antiproliferative-effects-and-necroptosis
#5
Wenbo Ma, Bart Tummers, Edith M G van Esch, Renske Goedemans, Cornelis J M Melief, Craig Meyers, Judith M Boer, Sjoerd H van der Burg
The clearance of a high-risk human papillomavirus (hrHPV) infection takes time and requires the local presence of a strong type 1 cytokine T cell response, suggesting that hrHPV has evolved mechanisms to resist this immune attack. Using an unique system for non, newly, and persistent hrHPV infection, we show that hrHPV infection renders keratinocytes (KCs) resistant to the antiproliferative- and necroptosis-inducing effects of IFNγ and TNFα. HrHPV-impaired necroptosis was associated with the upregulation of several methyltransferases, including EZH2, and the downregulation of RIPK3 expression...
2016: Frontiers in Immunology
https://www.readbyqxmd.com/read/27917176/graft-immune-cell-composition-associates-with-clinical-outcome-of-allogeneic-hematopoietic-stem-cell-transplantation-in-patients-with-aml
#6
Ulla Impola, Antti Larjo, Urpu Salmenniemi, Mervi Putkonen, Maija Itälä-Remes, Jukka Partanen
Complications of allogeneic hematopoietic stem cell transplantation (HSCT) have been attributed to immune cells transferred into the patient with the graft. However, a detailed immune cell composition of the graft is usually not evaluated. In the present study, we determined the level of variation in the composition of immune cells between clinical HSCT grafts and whether this variation is associated with clinical outcome. Sizes of major immune cell populations in 50 clinical grafts from a single HSCT Centre were analyzed using flow cytometry...
2016: Frontiers in Immunology
https://www.readbyqxmd.com/read/27917175/nuclear-localization-of-suppressor-of-cytokine-signaling-1-regulates-local-immunity-in-the-lung
#7
Jana Zimmer, Michael Weitnauer, Sébastien Boutin, Günter Küblbeck, Sabrina Thiele, Patrick Walker, Felix Lasitschka, Lars Lunding, Zane Orinska, Christina Vock, Bernd Arnold, Michael Wegmann, Alexander Dalpke
Suppressor of cytokine signaling 1 (SOCS1) is a negative feedback inhibitor of cytoplasmic Janus kinase and signal transducer and activator of transcription (STAT) signaling. SOCS1 also contains a nuclear localization sequence (NLS), yet, the in vivo importance of nuclear translocation is unknown. We generated transgenic mice containing mutated Socs1ΔNLS that fails to translocate in the cell nucleus (MGL(tg) mice). Whereas mice fully deficient for SOCS1 die within the first 3 weeks due to excessive interferon signaling and multiorgan inflammation, mice expressing only non-nuclear Socs1ΔNLS (Socs1(-/-)MGL(tg) mice) were rescued from early lethality...
2016: Frontiers in Immunology
https://www.readbyqxmd.com/read/27917174/cd16-monocyte-subset-was-enriched-and-functionally-exacerbated-in-driving-t-cell-activation-and-b-cell-response-in-systemic-lupus-erythematosus
#8
Huaqun Zhu, Fanlei Hu, Xiaolin Sun, Xiaoying Zhang, Lei Zhu, Xu Liu, Xue Li, Liling Xu, Lianjie Shi, Yuzhou Gan, Yin Su
BACKGROUND: The roles that CD16(+) monocyte subset plays in T-cell activation and B-cell response have not been well studied in systemic lupus erythematosus (SLE). OBJECTIVE: The present study aimed to investigate the distribution of CD16(+) monocyte subsets in SLE and explore their possible roles in T-cell activation and B-cell differentiation. METHODS: The frequencies of monocyte subsets in the peripheral blood of healthy controls (HCs) and patients with SLE were determined by flow cytometry...
2016: Frontiers in Immunology
https://www.readbyqxmd.com/read/27917173/live-imaging-of-immune-responses-in-experimental-models-of-multiple-sclerosis
#9
REVIEW
Barbara Rossi, Gabriela Constantin
Experimental autoimmune encephalomyelitis (EAE) is the most common animal model of multiple sclerosis (MS), a chronic inflammatory autoimmune disease of the central nervous system (CNS) characterized by multifocal perivascular infiltrates that predominantly comprise lymphocytes and macrophages. During EAE, autoreactive T cells first become active in the secondary lymphoid organs upon contact with antigen-presenting cells (APCs), and then gain access to CNS parenchyma, through a compromised blood-brain barrier, subsequently inducing inflammation and demyelination...
2016: Frontiers in Immunology
https://www.readbyqxmd.com/read/27917172/immunization-strategies-against-piscirickettsia-salmonis-infections-review-of-vaccination-approaches-and-modalities-and-their-associated-immune-response-profiles
#10
REVIEW
Øystein Evensen
Salmonid rickettsial septicemia (SRS) is a serious, infectious disease in Chilean salmon farming caused by Piscirickettsia salmonis, causing heavy losses to the salmonid industry. P. salmonis belongs to the Gammaproteobacteria, order Thiotrichales. SRS was first described in Chile in 1989, and infection with P. salmonis has since been described from a high number of fish species and in several geographic regions globally. P. salmonis infection of salmonids causes multifocal, necrotic areas of internal organs such as liver, kidney, and spleen...
2016: Frontiers in Immunology
https://www.readbyqxmd.com/read/27917171/editorial-vascular-inflammation-in-systemic-autoimmunity
#11
EDITORIAL
Giuseppe A Ramirez, Cornelia Weyand, Augusto Vaglio, Angelo A Manfredi
No abstract text is available yet for this article.
2016: Frontiers in Immunology
https://www.readbyqxmd.com/read/27909439/the-a-allele-of-the-single-nucleotide-polymorphism-rs630923-creates-a-binding-site-for-mef2c-resulting-in-reduced-cxcr5-promoter-activity-in-b-cell-lymphoblastic-cell-lines
#12
Nikita A Mitkin, Alisa M Muratova, Anton M Schwartz, Dmitry V Kuprash
Chemokine receptor CXCR5 is highly expressed in B-cells and under normal conditions is involved in their migration to specific areas of secondary lymphoid organs. B-cells are known to play an important role in various autoimmune diseases including multiple sclerosis (MS) where areas of demyelinating lesions attract B-cells by overexpressing CXCL13, the CXCR5 ligand. In this study, we aimed to determine the functional significance of single-nucleotide polymorphism rs630923 (A/C), which is located in cxcr5 gene promoter, and its common allele is associated with increased risk of MS...
2016: Frontiers in Immunology
https://www.readbyqxmd.com/read/27909438/donor-specific-regulatory-t-cells-acquired-from-tolerant-mice-bearing-cardiac-allograft-promote-mixed-chimerism-and-prolong-intestinal-allograft-survival
#13
Xiao-Fei Shen, Jin-Peng Jiang, Jian-Jun Yang, Wei-Zhong Wang, Wen-Xian Guan, Jun-Feng Du
The induction of donor-specific transplant tolerance has always been a central problem for small bowel transplantation (SBT), which is thought to be the best therapy for end-stage bowel failure. With the development of new tolerance-inducing strategies, mixed chimerism induced by co-stimulation blockade has become most potent for tolerance of allografts, such as skin, kidney, and heart. However, a lack of clinically available co-stimulation blockers has hindered efficient application in humans. Furthermore, unlike those for other types of solid organ transplantation, strategies to induce robust mixed chimerism for intestinal allografts have not been fully developed...
2016: Frontiers in Immunology
https://www.readbyqxmd.com/read/27909437/differentially-methylated-dna-regions-in-monozygotic-twin-pairs-discordant-for-rheumatoid-arthritis-an-epigenome-wide-study
#14
Anders J Svendsen, Kristina Gervin, Robert Lyle, Lene Christiansen, Kirsten Kyvik, Peter Junker, Christian Nielsen, Gunnar Houen, Qihua Tan
OBJECTIVES: In an explorative epigenome-wide association study (EWAS) to search for gene independent, differentially methylated DNA positions and regions (DMRs) associated with rheumatoid arthritis (RA) by studying monozygotic (MZ) twin pairs discordant for RA. METHODS: Genomic DNA was isolated from whole blood samples from 28 MZ twin pairs discordant for RA. DNA methylation was measured using the HumanMethylation450 BeadChips. Smoking, anti-cyclic citrullinated peptide antibodies, and immunosuppressive treatment were included as covariates...
2016: Frontiers in Immunology
https://www.readbyqxmd.com/read/27909436/evaluation-of-anti-inflammatory-effects-of-steroids-and-arthritis-related-biotherapies-in-an-in-vitro-coculture-model-with-immune-cells-and-synoviocytes
#15
Mélissa Noack, Ndiémé Ndongo-Thiam, Pierre Miossec
BACKGROUND: During rheumatoid arthritis (RA), steroids and biotherapies are used alone and combined. Efficacy has been established in clinical trials but their differential effects at the cellular level are less documented. The aim was to study these cellular effects using an in vitro model with synoviocytes interacting with peripheral blood mononuclear cells (PBMC) to reproduce the interactions in the RA synovium. METHODS: Activated-PBMC were cocultured with RA synoviocytes during 48 h...
2016: Frontiers in Immunology
https://www.readbyqxmd.com/read/27909435/immune-reconstitution-after-allogeneic-hematopoietic-stem-cell-transplantation
#16
REVIEW
Justyna Ogonek, Mateja Kralj Juric, Sakhila Ghimire, Pavankumar Reddy Varanasi, Ernst Holler, Hildegard Greinix, Eva Weissinger
The timely reconstitution and regain of function of a donor-derived immune system is of utmost importance for the recovery and long-term survival of patients after allogeneic hematopoietic stem cell transplantation (HSCT). Of note, new developments such as umbilical cord blood or haploidentical grafts were associated with prolonged immunodeficiency due to delayed immune reconstitution, raising the need for better understanding and enhancing the process of immune reconstitution and finding strategies to further optimize these transplant procedures...
2016: Frontiers in Immunology
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
#17
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/27895646/manufacturing-natural-killer-cells-as-medicinal-products
#18
REVIEW
Christian Chabannon, Bechara Mfarrej, Sophie Guia, Sophie Ugolini, Raynier Devillier, Didier Blaise, Eric Vivier, Boris Calmels
Natural Killer (NK) cells are innate lymphoid cells (ILC) with cytotoxic and regulatory properties. Their functions are tightly regulated by an array of inhibitory and activating receptors, and their mechanisms of activation strongly differ from antigen recognition in the context of human leukocyte antigen presentation as needed for T-cell activation. NK cells thus offer unique opportunities for new and improved therapeutic manipulation, either in vivo or in vitro, in a variety of human diseases, including cancers...
2016: Frontiers in Immunology
https://www.readbyqxmd.com/read/27895645/inflamm-aging-of-hematopoiesis-hematopoietic-stem-cells-and-the-bone-marrow-microenvironment
#19
REVIEW
Larisa V Kovtonyuk, Kristin Fritsch, Xiaomin Feng, Markus G Manz, Hitoshi Takizawa
All hematopoietic and immune cells are continuously generated by hematopoietic stem cells (HSCs) and hematopoietic progenitor cells (HPCs) through highly organized process of stepwise lineage commitment. In the steady state, HSCs are mostly quiescent, while HPCs are actively proliferating and contributing to daily hematopoiesis. In response to hematopoietic challenges, e.g., life-threatening blood loss, infection, and inflammation, HSCs can be activated to proliferate and engage in blood formation. The HSC activation induced by hematopoietic demand is mediated by direct or indirect sensing mechanisms involving pattern recognition receptors or cytokine/chemokine receptors...
2016: Frontiers in Immunology
https://www.readbyqxmd.com/read/27895644/recent-developments-in-cellular-immunotherapy-for-hsct-associated-complications
#20
REVIEW
Monica Reis, Justyna Ogonek, Marsela Qesari, Nuno M Borges, Lindsay Nicholson, Liane Preußner, Anne Mary Dickinson, Xiao-Nong Wang, Eva M Weissinger, Anne Richter
Allogeneic hematopoietic stem cell transplantation is associated with serious complications, and improvement of the overall clinical outcome of patients with hematological malignancies is necessary. During the last decades, posttransplant donor-derived adoptive cellular immunotherapeutic strategies have been progressively developed for the treatment of graft-versus-host disease (GvHD), infectious complications, and tumor relapses. To date, the common challenge of all these cell-based approaches is their implementation for clinical application...
2016: Frontiers in Immunology
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