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BMC Immunology

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https://www.readbyqxmd.com/read/28228109/fms-like-tyrosine-kinase-3-ligand-increases-resistance-to-burn-wound-infection-through-effects-on-plasmacytoid-dendritic-cells
#1
Leon Bae, Julia K Bohannon, Weihua Cui, Monika Vinish, Tracy Toliver-Kinsky
BACKGROUND: Patients experiencing large thermal injuries are susceptible to opportunistic infections that can delay recovery and lead to sepsis. Dendritic cells (DC) are important for the detection of pathogens and activation of the innate and acquired immune responses. DCs are significantly decreased in burn patients early after injury, and the development of sepsis is associated with persistent DC depletion. In a murine model of burn wound infection, the enhancement of DCs after injury by treatment with the DC growth factor Fms-like tyrosine kinase-3 ligand (FL) enhances neutrophil migration to infection, improves bacterial clearance, and increases survival in a DC-dependent manner...
February 22, 2017: BMC Immunology
https://www.readbyqxmd.com/read/28166724/association-between-il-17-and-iga-in-the-joints-of-patients-with-inflammatory-arthropathies
#2
Ricardo Javier Eliçabe, Juan Eduardo Silva, Mabel Noemí Dave, María Gabriela Lacoste, Héctor Tamashiro, Rodrigo Blas, Alicia Munarriz, Gabriel Adrián Rabinovich, María Silvia Di Genaro
BACKGROUND: Hyperactive secretion and pathogenic effects of interleukin (IL)-17 and IgA have been detected in different arthropathies. Recent evidence has revealed that TH17 cytokines regulate mucosal IgA secretion. However, it is unknown whether and how IL-17 mediates synovial IgA production. Here we aim to investigate the connection of synovial IL-17 with IgA production in the joint. In this study we included synovial fluids (SF) from patients with rheumatoid arthritis (RA; n = 66), spondyloarthritis (SpA; n = 18) and osteoarthritis (OA; n = 36)...
February 6, 2017: BMC Immunology
https://www.readbyqxmd.com/read/28158970/tumor-necrosis-factor-alpha-inhibitors-have-no-effect-on-a-human-t-lymphotropic-virus-type-i-htlv-i-infected-cell-line-from-patients-with-htlv-i-associated-myelopathy
#3
Shoichi Fukui, Hideki Nakamura, Yoshiko Takahashi, Naoki Iwamoto, Hiroo Hasegawa, Katsunori Yanagihara, Tatsufumi Nakamura, Akihiko Okayama, Atsushi Kawakami
BACKGROUND: While tumor necrosis factor alpha (TNF-α) inhibitors (TNFi) and other biologics are very effective against autoimmune diseases, they can also cause infectious diseases. Therefore, it is important to clarify whether the TNFi sometimes used to treat patients with rheumatoid arthritis (RA) complicated with human T-lymphotropic virus type-I (HTLV-I) infection have the unintended side effect of promoting HTLV-I proliferation. METHODS: We used the HTLV-I-infected cell line HCT-5, derived from spinal fluid cells of a patient with HTLV-I associated myelopathy, to evaluate the production of cytokines and chemokines, TNF-α receptor (TNFR), the expression of HTLV-I associated genes, the HTLV-I proviral load (PVL), the expression of HTLV-I structural protein, and apoptosis...
February 3, 2017: BMC Immunology
https://www.readbyqxmd.com/read/28148223/effect-of-cryopreservation-on-delineation-of-immune-cell-subpopulations-in-tumor-specimens-as-determinated-by-multiparametric-single-cell-mass-cytometry-analysis
#4
Elma Kadić, Raymond J Moniz, Ying Huo, An Chi, Ilona Kariv
BACKGROUND: Comprehensive understanding of cellular immune subsets involved in regulation of tumor progression is central to the development of cancer immunotherapies. Single cell immunophenotyping has historically been accomplished by flow cytometry (FC) analysis, enabling the analysis of up to 18 markers. Recent advancements in mass cytometry (MC) have facilitated detection of over 50 markers, utilizing high resolving power of mass spectrometry (MS). This study examined an analytical and operational feasibility of MC for an in-depth immunophenotyping analysis of the tumor microenvironment, using the commercial CyTOF™ instrument, and further interrogated challenges in managing the integrity of tumor specimens...
February 2, 2017: BMC Immunology
https://www.readbyqxmd.com/read/28129747/giardia-specific-cellular-immune-responses-in-post-giardiasis-chronic-fatigue-syndrome
#5
Kurt Hanevik, Einar Kristoffersen, Kristine Mørch, Kristin Paulsen Rye, Steinar Sørnes, Staffan Svärd, Øystein Bruserud, Nina Langeland
BACKGROUND: The role of pathogen specific cellular immune responses against the eliciting pathogen in development of post-infectious chronic fatigue syndrome (PI-CFS) is not known and such studies are difficult to perform. The aim of this study was to evaluate specific anti-Giardia cellular immunity in cases that developed CFS after Giardia infection compared to cases that recovered well. Patients reporting chronic fatigue in a questionnaire study three years after a Giardia outbreak were clinically evaluated five years after the outbreak and grouped according to Fukuda criteria for CFS and idiopathic chronic fatigue...
January 28, 2017: BMC Immunology
https://www.readbyqxmd.com/read/28077081/antigen-presenting-capacity-of-murine-splenic-myeloid-cells
#6
Ying-Ying Hey, Benjamin Quah, Helen C O'Neill
BACKGROUND: The spleen is an important site for hematopoiesis. It supports development of myeloid cells from bone marrow-derived precursors entering from blood. Myeloid subsets in spleen are not well characterised although dendritic cell (DC) subsets are clearly defined in terms of phenotype, development and functional role. Recently a novel dendritic-like cell type in spleen named 'L-DC' was distinguished from other known dendritic and myeloid cells by its distinct phenotype and developmental origin...
January 11, 2017: BMC Immunology
https://www.readbyqxmd.com/read/28061809/oxidative-stress-biomarkers-and-their-relationship-with-cytokine-concentrations-in-overweight-obese-pregnant-women-and-their-neonates
#7
María Hernández-Trejo, Araceli Montoya-Estrada, Yessica Torres-Ramos, Aurora Espejel-Núñez, Alberto Guzmán-Grenfell, Rosa Morales-Hernández, Maricruz Tolentino-Dolores, Estibalitz Laresgoiti-Servitje
BACKGROUND: Oxidative damage present in obese/overweight mothers may lead to further oxidative stress conditions or inflammation in maternal and cord blood samples. Thirty-four pregnant women/newborn pairs were included in this study to assess the presence of oxidative stress biomarkers and their relationship with serum cytokine concentrations. Oxidative stress biomarkers and antioxidant enzymes were compared between the mother/offspring pairs. The presence of 27 cytokines was measured in maternal and cord blood samples...
January 7, 2017: BMC Immunology
https://www.readbyqxmd.com/read/28061847/role-of-intestinal-microbiota-and-metabolites-on-gut-homeostasis-and-human-diseases
#8
REVIEW
Lan Lin, Jianqiong Zhang
BACKGROUND: A vast diversity of microbes colonizes in the human gastrointestinal tract, referred to intestinal microbiota. Microbiota and products thereof are indispensable for shaping the development and function of host innate immune system, thereby exerting multifaceted impacts in gut health. METHODS: This paper reviews the effects on immunity of gut microbe-derived nucleic acids, and gut microbial metabolites, as well as the involvement of commensals in the gut homeostasis...
January 6, 2017: BMC Immunology
https://www.readbyqxmd.com/read/28056810/porphyromonas-gingivalis-activates-nf%C3%AE%C2%BAb-and-mapk-pathways-in-human-oral-epithelial-cells
#9
Sabine Groeger, Fabian Jarzina, Eugen Domann, Joerg Meyle
BACKGROUND: The bacterial biofilm at the gingival margin induces a host immune reaction. In this local inflammation epithelial cells defend the host against bacterial challenge. Porphyromonas gingivalis (P. gingivalis), a keystone pathogen, infects epithelial cells. The aim of this study was to investigate the activation of signaling cascades in primary epithelial cells and oral cancer cell lines by a profiler PCR array. RESULTS: After infection with P. gingivalis membranes the RNA of 16 to 33 of 84 key genes involved in the antibacterial immune response was up-regulated, amongst them were IKBKB (NF-κB signaling pathway), IRF5 (TLR signaling) and JUN, MAP2K4, MAPK14 and MAPK8 (MAPK pathway) in SCC-25 cells and IKBKB, IRF5, JUN, MAP2K4, MAPK14 and MAPK8 in PHGK...
January 5, 2017: BMC Immunology
https://www.readbyqxmd.com/read/27887569/immune-modulation-of-cd4-cd25-regulatory-t-cells-by-zoledronic-acid
#10
Hsien Liu, Shih-Han Wang, Shin-Cheh Chen, Ching-Ying Chen, Jo-Lin Lo, Tsun-Mei Lin
BACKGROUND: CD4(+)CD25(+) regulatory T (Treg) cells suppress tumor immunity by inhibiting immune cells. Manipulation of Treg cells represents a new strategy for cancer treatment. Zoledronic acid (ZA), a nitrogen-containing bisphosphonate, inhibits the expression of receptor activator of nuclear factor kappa-B ligand (RANKL) on osteoblasts to inhibit osteoclastogenesis. In a mouse model of bisphosphonate-related osteonecrosis of the jaw, administration of ZA suppressed Treg-cell activity and activated inflammatory Th17 cells...
November 25, 2016: BMC Immunology
https://www.readbyqxmd.com/read/27835944/optimization-and-evaluation-of-luminex-performance-with-supernatants-of-antigen-stimulated-peripheral-blood-mononuclear-cells
#11
Mathieu Surenaud, Céline Manier, Laura Richert, Rodolphe Thiébaut, Yves Levy, Sophie Hue, Christine Lacabaratz
BACKGROUND: The Luminex bead-based multiplex assay is useful for quantifying immune mediators such as cytokines and chemokines. Cross-comparisons of reagents for this technique from different suppliers have already been performed using serum or plasma but rarely with supernatants collected from antigen-stimulated peripheral blood mononuclear cells (PBMC). Here, we first describe an optimization protocol for cell culture including quantity of cells and culture duration to obtain reproducible cytokine and chemokine quantifications...
November 11, 2016: BMC Immunology
https://www.readbyqxmd.com/read/27825298/the-ut-family-of-mhc-class-i-loci-unique-to-non-eutherian-mammals-has-limited-polymorphism-and-tissue-specific-patterns-of-expression-in-the-opossum
#12
Katina V Krasnec, Anthony T Papenfuss, Robert D Miller
BACKGROUND: The Major Histocompatibility Complex (MHC) class I family of genes encode for molecules that have well-conserved structures, but have evolved to perform diverse functions. The availability of the gray, short-tailed opossum, Monodelphis domestica whole genome sequence has allowed for analysis of MHC class I gene content in this marsupial. Utilization of a novel method to search for MHC related domain structures revealed a previously unknown family of MHC class I-related genes...
November 8, 2016: BMC Immunology
https://www.readbyqxmd.com/read/27793087/lipoproteins-attenuate-tlr2-and-tlr4-activation-by-bacteria-and-bacterial-ligands-with-differences-in-affinity-and-kinetics
#13
Jeroen van Bergenhenegouwen, Aletta D Kraneveld, Lieke Rutten, Johan Garssen, Arjan P Vos, Anita Hartog
BACKGROUND: The small intestine is a specialized compartment were close interactions take place between host, microbes, food antigens and dietary fatty acids. Dietary fats get absorbed by epithelial cells and processed into a range of lipoprotein particles after which they are basolaterally secreted and collected in the lymphatics. In contrast to the colon, the small intestine is covered only by a thin mucus coat that allows for intimate interactions between host-cells and microbes. Lipoproteins have long been recognized as protective factors in infectious diseases via the neutralization of bacterial toxins like lipopolysaccharides...
October 28, 2016: BMC Immunology
https://www.readbyqxmd.com/read/27784285/inhibition-of-histone-methyltransferase-ezh2-ameliorates-early-acute-renal-allograft-rejection-in-rats
#14
Long Li, Yi Zhang, Ming Xu, Ruiming Rong, Jina Wang, Tongyu Zhu
BACKGROUND: Although histone methyltransferases EZH2 has been proved to have significant regulatory effect on the immune rejection after hematopoietic stem cell transplantation, its role in solid-organ transplantation remains uncovered. In this study, we investigate whether histone methylation regulation can impact renal allograft rejection in rat models. RESULTS: Allogeneic rat renal transplantation model (Wistar to Lewis) was established, and the recipients were administrated with EZH2 inhibitor DZNep after transplantation...
October 26, 2016: BMC Immunology
https://www.readbyqxmd.com/read/27769184/distinct-phenotypic-subpopulations-of-circulating-cd4-cxcr5-follicular-helper-t-cells-in-children-with-active-iga-vasculitis
#15
Deying Liu, Jinxiang Liu, Jinghua Wang, Congcong Liu, Sirui Yang, Yanfang Jiang
BACKGROUND: Circulating follicular helper T (Tfh) cells are a heterogeneous population of CD4(+) helper T cells that promotes pathogenic immune responses in autoimmune diseases. In this study, we examined the status of different subpopulations of Tfh cells in peripheral circulation and their associations with various clinical characteristics of IgA vasculitis (IgAV). METHODS: According to the phenotypic expressions of different molecules, focus was given on six subpopulations of Tfh cells: CD4(+)CXCR5(+), CD4(+)CXCR5(+)ICOS(+), CD4(+)CXCR5(+)ICOS(+)PD-1(+), CD4(+)CXCR5(+)ICOS(high)PD-1(high), CD4(+)CXCR5(+)ICOS(-)PD-1(+), and CXCR5(+)CD45RA(-)IL-21(+)...
October 21, 2016: BMC Immunology
https://www.readbyqxmd.com/read/27756214/chitosan-gel-vaccine-protects-against-tumour-growth-in-an-intracaecal-mouse-model-of-cancer-by-modulating-systemic-immune-responses
#16
Andrew J Highton, Adam Girardin, Georgia M Bell, Sarah M Hook, Roslyn A Kemp
BACKGROUND: Vaccination generating a robust memory population of CD8(+) T cells may provide protection against cancer. However, immune therapies for cancer are influenced by the local tumour immune microenvironment. An infiltrate of T cells into tumours of people with colorectal cancer has proven to be a significant indicator of good prognosis. METHODS: We used an intracaecal mouse model of cancer to determine whether a protective immune response against a mucosal gut tumour could be generated using a systemic intervention...
October 18, 2016: BMC Immunology
https://www.readbyqxmd.com/read/27729009/a-new-high-throughput-sequencing-method-for-determining-diversity-and-similarity-of-t-cell-receptor-tcr-%C3%AE-and-%C3%AE-repertoires-and-identifying-potential-new-invariant-tcr-%C3%AE-chains
#17
Kazutaka Kitaura, Tadasu Shini, Takaji Matsutani, Ryuji Suzuki
BACKGROUND: High-throughput sequencing of T cell receptor (TCR) genes is a powerful tool for analyses of antigen specificity, clonality and diversity of T lymphocytes. Here, we developed a new TCR repertoire analysis method using 454 DNA sequencing technology in combination with an adaptor-ligation mediated polymerase chain reaction (PCR). This method allows the amplification of all TCR genes without PCR bias. To compare gene usage, diversity and similarity of expressed TCR repertoires among individuals, we conducted next-generation sequencing (NGS) of TRA and TRB genes in peripheral blood mononuclear cells from 20 healthy human individuals...
October 11, 2016: BMC Immunology
https://www.readbyqxmd.com/read/27716047/intranasal-immunization-with-recombinant-toxoplasma-gondii-actin-depolymerizing-factor-confers-protective-efficacy-against-toxoplasmosis-in-mice
#18
Zhuanzhuan Liu, Litian Yin, Yaqing Li, Fei Yuan, Xiaofan Zhang, Jiazhi Ma, Hongmei Liu, Yanjuan Wang, Kuiyang Zheng, Jianping Cao
BACKGROUND: Toxoplasma gondii is an opportunistic protozoan closely associated with AIDS and vertical transmission. T. gondii actin depolymerizing factor (TgADF) plays an important role in actin cytoskeleton remodeling, and it is required to invade host cells. TgADF was a promising vaccine candidate. To observe the immunological changes and protective efficacy of recombinant TgADF protein (rTgADF) against T. gondii infection, we optimized the intranasal immunization dose of rTgADF and analyzed the survival rate and tachyzoite loads in mouse tissues after oral challenge with T...
October 6, 2016: BMC Immunology
https://www.readbyqxmd.com/read/27716059/il-23-plasma-level-is-strongly-associated-with-cmv-status-and-reactivation-of-cmv-in-renal-transplant-recipients
#19
Mahmoud Sadeghi, Imad Lahdou, Gerhard Opelz, Arianeb Mehrabi, Martin Zeier, Paul Schnitzler, Volker Daniel
BACKGROUND: Cytomegalovirus seropositivity is an independent risk factor for atherosclerosis in patients with ESRD. Donor CMV seropositivity is associated with higher graft loss. Dendritic cells, macrophages and Th17 lymphocytes are defined as producers of IL-23. IL-23 is thought to be involved in the promotion of Th17 cell polarization. Latent CMV-induced Th17 might be involved in the pathogenesis of CMV infection in patients with ESRD. We aimed to evaluate associations of Th17-dependent cytokines with ESRD, CMV status and post-transplant outcome in kidney transplantation...
October 3, 2016: BMC Immunology
https://www.readbyqxmd.com/read/27716046/immune-analysis-of-expression-of-il-17-relative-ligands-and-their-receptors-in-bladder-cancer-comparison-with-polyp-and-cystitis
#20
Yanbo Liu, Wanguo Yang, Lijing Zhao, Zuowen Liang, Weigao Shen, Qinlong Hou, Zhenjiang Wang, Jing Jiang, Sun Ying
BACKGROUND: Bladder cancer, cystitis and bladder polyp are the most common urinary system diseases all over the world. Our former research results show that IL-17A and IL-17 F contribute to the pathogenesis of benign prostatic hyperplasia (BPH) and prostate cancer (Pca) while IL-17E interacting with IL-17RB might have an anti-tumor effect. RESULTS: Using imunohistochemistry, we systemically compared immunoreactivity of ligands (IL-17A, E and F) and receptors (IL-17RA, IL-17RB and IL-17RC) of IL-17 family, infiltration of inflammatory cells and changes of structural cells (fibroblast cells, smooth muscle and vascular endothelial cells) in sections of bladder tissues from subjects with bladder cancer, cystitis and bladder polyp...
October 3, 2016: BMC Immunology
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