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https://www.readbyqxmd.com/read/28741671/the-impact-of-foxp3-polymorphism-on-the-risk-of-allergic-rhinitis-a-meta-analysis
#1
Guimin Zhang, Di Zhang, Wenjie Shi, Peiyong Sun, Peng Lin
Polymorphisms of several genes were reported to be associated with the risk of allergic rhinitis. Here, we first conducted a meta-analysis to evaluate the potential genetic association between the polymorphisms of the FOXP3 (Forkhead Box P3) gene and the susceptibility to allergic rhinitis. A total of 2671 relevant articles were initially retrieved from the databases of PubMed, Web of Science, Embase, WANFANG/CNKI and Scopus, and six eligible case-control studies were finally enrolled in our meta-analysis, according to our strict inclusion/exclusion criteria...
July 25, 2017: Annals of Human Genetics
https://www.readbyqxmd.com/read/28736829/clonal-analysis-of-regulatory-t-cell-defect-in-patients-with-autoimmune-polyendocrine-syndrome-type-1-suggests-intrathymic-impairment
#2
Tuisku-Tuulia Koivula, Sini M Laakso, Heikki J Niemi, Eliisa Kekäläinen, Pia Laine, Lars Paulin, Petri Auvinen, T Petteri Arstila
Mutations in the Autoimmune Regulator (AIRE) gene disrupt thymic T cell development and negative selection, leading to the recessively inherited polyendocrine autoimmune disease APS-1 (autoimmune polyendocrine syndrome type 1). The patients also have a functional defect in the FOXP3(+) regulatory T cell population, but its origin is unclear. Here we have used T cell receptor sequencing to analyze the clonal relationship of major CD4(+) T cell subsets in 3 patients and 3 healthy controls. The naive regulatory T cells showed little overlap with helper T cell subsets, supporting divergence in the thymus...
July 22, 2017: Scandinavian Journal of Immunology
https://www.readbyqxmd.com/read/28736280/the-serine-threonine-protein-phosphatase-2a-controls-autoimmunity
#3
Amir Sharabi, Isaac R Kasper, George C Tsokos
Protein phosphatase 2A (PP2A) is the first Ser/Thr phosphatase recognized to contribute to human and murine lupus immunopathology. PP2A expression in SLE is controlled both epigenetically and genetically, and it is increased in patients with SLE, which contributes to decreased IL-2 production, decreased CD3ζ and increased FcRγ expression on the surface of T cells, increased CREMα expression, hypomethylation of genes associated with SLE pathogenesis, and increased IL-17 production. B regulatory subunit of PP2A regulates IL-2 deprivation-induced T cell death and is decreased in SLE patients...
July 20, 2017: Clinical Immunology: the Official Journal of the Clinical Immunology Society
https://www.readbyqxmd.com/read/28731226/curcumin-converts-foxp3-regulatory-t-cells-to-t-helper-1-cells-in-patients-with-lung-cancer
#4
JianYong Zou, ChunHua Su, HongHe Luo, YiYan Lei, Bo Zeng, HaoShuai Zhu, ZhenGuang Chen
The regulatory T cells (Treg) play an important role in the tumor tolerance. The methods to regulate the Treg population in cancer-bearing hosts are limited currently. The effect of curcumin on inhibiting cancer has been recognized, but the mechanism remains elusive. This study tests a hypothesis that administration of curcumin down regulates Tregs in lung cancer (LC) patients. In this study, a group of LC patients was treated with curcumin. The peripheral Tregs and T helper (Th) 1 cells were analyzed by flow cytometry...
July 21, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28719617/microrna-155-deficiency-leads-to-decreased-autoantibody-levels-and-reduced-severity-of-nephritis-and-pneumonitis-in-pristane-induced-lupus
#5
Harald Leiss, Wilhelm Salzberger, Barbara Jacobs, Irina Gessl, Nicolas Kozakowski, Stephan Blüml, Antonia Puchner, Attila Kiss, Bruno K Podesser, Josef S Smolen, Georg H Stummvoll
OBJECTIVE: We herein examine the role of endogenous miR155 in the development of systemic manifestations in pristane induced lupus. MATERIALS AND METHODS: Systemic lupus in miR155-deficient and wild type mice was induced upon injection of pristane and analyzed after 8 months, PBS-injected mice served as controls. Glomerulonephritis and pneumonitis were quantified using the kidney biopsy score and a newly adapted histomorphometric image analysis system; lung tissue was further analyzed by tissue cytometry...
2017: PloS One
https://www.readbyqxmd.com/read/28716029/foxp3-promotes-tumor-growth-and-metastasis-by-activating-wnt-%C3%AE-catenin-signaling-pathway-and-emt-in-non-small-cell-lung-cancer
#6
Shucai Yang, Yi Liu, Ming-Yue Li, Calvin S H Ng, Sheng-Li Yang, Shanshan Wang, Chang Zou, Yujuan Dong, Jing Du, Xiang Long, Li-Zhong Liu, Innes Y P Wan, Tony Mok, Malcolm J Underwood, George G Chen
BACKGROUND: The role of cancer cell FOXP3 in tumorigenesis is conflicting. We aimed to study FOXP3 expression and regulation, function and clinical implication in human non-small cell lung cancer (NSCLC). METHODS: One hundred and six patients with histologically-confirmed NSCLC who underwent surgery were recruited for the study. Tumor samples and NSCLC cell lines were used to examine FOXP3 and its related molecules. Various cell functions related to tumorigenesis were performed...
July 17, 2017: Molecular Cancer
https://www.readbyqxmd.com/read/28709726/induction-and-maintenance-of-regulatory-t-cells-by-transcription-factors-and-epigenetic-modifications
#7
REVIEW
Mana Iizuka-Koga, Hiroko Nakatsukasa, Minako Ito, Takashi Akanuma, Qianjin Lu, Akihiko Yoshimura
Regulatory T cells (Tregs) are an essential cell subset for the maintenance of immune homeostasis. Foxp3 (Forkhead box P3) is the Treg master gene which is essential for immune suppressing activity. In addition, Tregs are characterized by a distinct pattern of gene expression, including upregulation of immune-suppressive genes and silencing of inflammatory genes. The molecular mechanisms of Treg development and maintenance have been intensively investigated. Tregs are characterized by expression of the transcription factor Foxp3...
July 11, 2017: Journal of Autoimmunity
https://www.readbyqxmd.com/read/28706983/preimplantation-kidney-biopsies-of-extended-criteria-donors-have-a-heavier-inflammatory-burden-than-kidneys-from-standard-criteria-donors
#8
Camila M Mazeti-Felicio, Heloisa C Caldas, Ida M M Fernandes-Charpiot, Camila Z Dezotti, Maria A S F Baptista, Mario Abbud-Filho
BACKGROUND: Donors after brain death develop a systemic proinflammatory state that may predispose the kidneys to injury after transplantation. Because it is not known whether this inflammatory environment similarly affects the kidneys from expanded criteria donor (ECD) and standard criteria donors (SCD), we sought to evaluate differences in the gene expression of inflammatory cytokines in preimplantation biopsies (PIBx) from ECD and SCD kidneys. METHODS: Cytokines gene expression was measured in 80 PIBx (SCD, 52; ECD, 28) and associated with donor variables...
July 2017: Transplantation Direct
https://www.readbyqxmd.com/read/28702031/alloantigen-induced-regulatory-t-cells-generated-in-presence-of-vitamin-c-display-enhanced-stability-of-foxp3-expression-and-promote-skin-allograft-acceptance
#9
Eirini Nikolouli, Matthias Hardtke-Wolenski, Martin Hapke, Michael Beckstette, Robert Geffers, Stefan Floess, Elmar Jaeckel, Jochen Huehn
Regulatory T cells (Tregs) are critical for the maintenance of immune homeostasis and self-tolerance and can be therapeutically used for prevention of unwanted immune responses such as allotransplant rejection. Tregs are characterized by expression of the transcription factor Foxp3, and recent work suggests that epigenetic imprinting of Foxp3 and other Treg-specific epigenetic signatures genes is crucial for the stabilization of both Foxp3 expression and immunosuppressive properties within Tregs. Lately, vitamin C was reported to enhance the activity of enzymes of the ten-eleven translocation family, thereby fostering the demethylation of Foxp3 and other Treg-specific epigenetic signatures genes in developing Tregs...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28698369/a-distinct-subpopulation-of-cd25-t-follicular-regulatory-cells-localizes-in-the-germinal-centers
#10
James Badger Wing, Yohko Kitagawa, Michela Locci, Hannah Hume, Christopher Tay, Takayoshi Morita, Yujiro Kidani, Kyoko Matsuda, Takeshi Inoue, Tomohiro Kurosaki, Shane Crotty, Cevayir Coban, Naganari Ohkura, Shimon Sakaguchi
T-follicular helper (Tfh) cells differentiate through a multistep process, culminating in germinal center (GC) localized GC-Tfh cells that provide support to GC-B cells. T-follicular regulatory (Tfr) cells have critical roles in the control of Tfh cells and GC formation. Although Tfh-cell differentiation is inhibited by IL-2, regulatory T (Treg) cell differentiation and survival depend on it. Here, we describe a CD25(-) subpopulation within both murine and human PD1(+)CXCR5(+)Foxp3(+) Tfr cells. It is preferentially located in the GC and can be clearly differentiated from CD25(+) non-GC-Tfr, Tfh, and effector Treg (eTreg) cells by the expression of a wide range of molecules...
July 11, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28690889/imbalances-in-t-cell-related-transcription-factors-among-patients-with-hashimoto-s-thyroiditis
#11
Vahid Safdari, Ebrahim Alijani, Maryam Nemati, Abdollah Jafarzadeh
OBJECTIVES: Imbalances in effector T cell functioning have been associated with a number of autoimmune diseases, including Hashimoto's thyroiditis (HT). Differentiation of effector T helper (Th) 1, Th2, Th17 and regulatory T cell (Treg) lymphocytes is regulated by transcription factors, including Th1-specific T box (T-bet), GATA binding protein-3 (GATA3), retinoid-related orphan receptor (ROR)-α and forkhead box P3 (FOXP3). This study aimed to investigate Th1/Th2, Th1/Treg, Th2/Treg and Th17/Treg balances at the level of these transcription factors...
May 2017: Sultan Qaboos University Medical Journal
https://www.readbyqxmd.com/read/28680330/differentiated-all-trans-retinoic-acid-response-of-naive-cd4-cd25-cells-isolated-from-rats-with-collagen-induced-arthritis-and-healthy-ones-under-in-vitro-conditions
#12
Isaura Felcenloben, Edyta Żyromska, Tomasz Piasecki, Joanna Rossowska, Anna Kędzierska, Marcin Nowak, Marcin Żyromski, Anna Chełmońska-Soyta
AIM O THE STUDY: To compare the potential of CD4+CD25- cells, isolated from both healthy rats and rats with CIA (Collagen-Induced Arthritis), for differentiation into regulatory T cells in the presence of all-trans retinoic acid in order to learn more about the activation mechanisms and therapeutic potential of regulatory T cells. MATERIAL AND METHODS: Sorted CD4+CD25- cells were cultured in vitro with/without ATRA, and then the frequency of regulatory T cells and their ability to secrete IL-10 by CD4+ FOXP3+ cells was examined...
2017: Central-European Journal of Immunology
https://www.readbyqxmd.com/read/28666843/downregulated-regulatory-t-cell-function-is-associated-with-increased-peptic-ulcer-in-helicobacter-pylori-infection
#13
Nader Bagheri, Hedayatollah Shirzad, Shokrollah Elahi, Fatemeh Azadegan-Dehkordi, Ghorbanali Rahimian, Mohammedhadi Shafigh, Reza Rashidii, Abdulfatah Sarafnejad, Mahmoud Rafieian-Kopaei, Rana Faridani, Kamran Tahmasbi, Soleiman Kheiri, Alireza Razavi
BACKGROUND: Helicobacter pylori (H. pylori) chronically colonizes gastric/duodenal mucosa and induces gastroduodenal disease such as gastritis and peptic ulcer and induces vigorous innate and specific immune responses; however, the infection is not removed, a state of chronic active gastritis persists for life if untreated. The objective of this study was to determine the number of regulatory T cells (Tregs) in gastric mucosa of patients with gastritis and peptic ulcer and determined the relationship between main virulence factor of H...
June 27, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28662296/phase-iia-trial-of-fingolimod-for-als-demonstrates-acceptable-acute-safety-and-tolerability
#14
James D Berry, Sabrina Paganoni, Nazem Atassi, Eric A Macklin, Namita Goyal, Michael Rivner, Ericka Simpson, Stanley Appel, Daniela L Grasso, Nicte I Mejia, Farrah Mateen, Alan Gill, Fernando Vieira, Valerie Tassinari, Steven Perrin
INTRODUCTION: Immune activation is implicated in ALS progression. Oral fingolimod reduces circulating lymphocytes. The objective of this phase IIa randomized controlled trial was to test the short-term safety, tolerability, and target engagement of fingolimod in ALS. METHODS: Randomization was 2:1 (fingolimod:placebo). Treatment duration was four weeks. Primary outcomes were safety and tolerability. Secondary outcomes included circulating lymphocytes and whole blood gene expression...
June 29, 2017: Muscle & Nerve
https://www.readbyqxmd.com/read/28655579/the-interbranchial-lymphoid-tissue-likely-contributes-to-immune-tolerance-and-defense-in-the-gills-of-atlantic-salmon
#15
Ida Bergva Aas, Lars Austbø, Knut Falk, Ivar Hordvik, Erling Olaf Koppang
Central and peripheral immune tolerance is together with defense mechanisms a hallmark of all lymphoid tissues. In fish, such tolerance is especially important in the gills, where the intimate contact between gill tissue and the aqueous environment would otherwise lead to continual immune stimulation by innocuous antigens. In this paper, we focus on the expression of genes associated with immune regulation by the interbranchial lymphoid tissue (ILT) in an attempt to understand its role in maintaining immune homeostasis...
June 24, 2017: Developmental and Comparative Immunology
https://www.readbyqxmd.com/read/28646042/on-the-role-il-4-il-13-heteroreceptor-plays-in-regulation-of-type-1-diabetes
#16
Tobechukwu K Ukah, Alexis N Cattin-Roy, Weirong Chen, Mindy M Miller, Subhasis Barik, Habib Zaghouani
Type 1 diabetes (T1D) manifests when the insulin-producing pancreatic β cells are destroyed as a consequence of an inflammatory process initiated by lymphocytes of the immune system. The NOD mouse develops T1D spontaneously and serves as an animal model for human T1D. The IL-4Rα/IL-13Rα1 heteroreceptor (HR) serves both IL-4 and IL-13 cytokines, which are believed to function as anti-inflammatory cytokines in T1D. However, whether the HR provides a responsive element to environmental (i.e., physiologic) IL-4/IL-13 in the regulation of peripheral tolerance and the development of T1D has yet to be defined...
August 1, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28638744/azacytidine-prevents-experimental-xenogeneic-graft-versus-host-disease-without-abrogating-graft-versus-leukemia-effects
#17
Grégory Ehx, Gilles Fransolet, Laurence de Leval, Stéphanie D'Hondt, Sophie Lucas, Muriel Hannon, Loïc Delens, Sophie Dubois, Pierre Drion, Yves Beguin, Stéphanie Humblet-Baron, Frédéric Baron
The demethylating agent 5-azacytidine (AZA) has proven its efficacy in the treatment of myelodysplastic syndrome and acute myeloid leukemia. In addition, AZA can demethylate FOXP3 intron 1 (FOXP3i1) leading to the generation of regulatory T cells (Treg). Here, we investigated the impact of AZA on xenogeneic graft-vs.-host disease (xGVHD) and graft-vs.-leukemia effects in a humanized murine model of transplantation (human PBMCs-infused NSG mice), and described the impact of the drug on human T cells in vivo...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/28630656/physical-activity-black-carbon-exposure-and-dna-methylation-in-the-foxp3-promoter
#18
Stephanie Lovinsky-Desir, Kyung Hwa Jung, Jacqueline R Jezioro, David Z Torrone, Mariangels de Planell-Saguer, Beizhan Yan, Frederica P Perera, Andrew G Rundle, Matthew S Perzanowski, Steven N Chillrud, Rachel L Miller
BACKGROUND: Physical activity is associated with improvement in lung function; however, pollution exposure during physical activity can lead to a transient reduction in lung function. This paradoxical relationship may be linked to altered T regulatory (Treg) cell activity, which increases with exercise and suppresses airway inflammation, but decreases in association with exposure to air pollution. To clarify these relationships, we investigated buccal cell DNA methylation of the forkhead box p3 (FOXP3) gene promoter, a proposed biomarker of Treg activity...
2017: Clinical Epigenetics
https://www.readbyqxmd.com/read/28630384/modulation-of-cd4-t-cell-subsets-by-euphorbia-microciadia-and-euphorbia-osyridea-plant-extracts
#19
Haideh Namdari, Maryam Izad, Zahra Amirghofran
BACKGROUND: Euphorbia plants are traditionally used in folk medicine for infections, inflammation, and cancer. OBJECTIVES: To investigate the effects of the butanolic extracts of Euphorbia micorociadia and Euphorbia osyridea on specific transcription factors and cytokines expression of T cell subsets. METHODS: Activated mouse splenocytes were cultured in the presence of non-cytotoxic concentrations of the extracts. Cells were evaluated for the gene expressions of T cell transcription factors and cytokines of T helper (Th)1 [T-bet and interferon gamma (IFNγ)], Th17 [retinoic acid receptor related orphan receptor (RORγt) and interleukin (IL)-17], and T regulatory (Treg) cells [forkhead box P3(Foxp3), IL-10, and Transforming growth factor (TGF)-β] using real-time PCR...
June 2017: Iranian Journal of Immunology: IJI
https://www.readbyqxmd.com/read/28622455/intestinal-metabolites-are-profoundly-altered-in-the-context-of-hla-b27-expression-and-functionally-modulate-disease-in-a-rat-model-of-spondyloarthropathy
#20
Mark Asquith, Sean Davin, Patrick Stauffer, Claire Michell, Cathleen Janowitz, Phoebe Lin, Joe Ensign-Lewis, Jason M Kinchen, Dennis R Koop, Jim Rosenbaum
Objective HLA-B27 associated spondyloarthropathies are associated with an altered intestinal microbiota and bowel inflammation. Therefore, we sought to identify B27-dependent changes in both host and microbial metabolites in the HLA-B27/β2m rat and whether microbiota-derived metabolites could impact disease in this major model of spondyloarthropathy. Methods Cecal contents were collected from 6wk (pre-diseased) and 16wk (diseased) Fischer 344 HLA-B27/β2m transgenic rats and WT controls. Metabolomic profiling was performed by high-throughput gas- and liquid-chromatography-based mass spectrometry...
June 16, 2017: Arthritis & Rheumatology
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