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https://www.readbyqxmd.com/read/28091550/imbalance-of-th17-treg-cells-in-pathogenesis-of-patients-with-human-leukocyte-antigen-b27-associated-acute-anterior-uveitis
#1
Zhenchao Zhuang, Yuqin Wang, Gejing Zhu, Yunfeng Gu, Liping Mao, Meng Hong, Yali Li, Meiqin Zheng
Th17 and regulatory T cells, involved in the pathogenesis of several autoimmune diseases, are new lineages of CD4+ T helper cells. However, the role of their imbalance in human leukocyte antigen B27-associated acute anterior uveitis has not been elucidated. In our study, the percentages of Th17 and Treg cells, their molecular markers and related factors in peripheral blood of patients and healthy controls were measured by flow cytometry, real-time RT-PCR and ELISA. We observed a remarkable increase of CD4+ and CD4+IL-17+ T cells in peripheral blood of patients compared to controls...
January 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28088699/procyanidin-b2-gallates-inhibit-ifn-%C3%AE-and-il-17-production-in-t-cells-by-suppressing-t-bet-and-ror%C3%AE-t-expression
#2
Sachi Tanaka, Kanon Furuya, Kana Yamamoto, Kazuki Yamada, Mikihiro Ichikawa, Manato Suda, Hidefumi Makabe
Procyanidins are widely found in plants and have anti-inflammatory activities. Procyanidin B2 (PCB2) inhibits production of proinflammatory cytokines in macrophages. However, there has been no study that has attempted to determine the effects of PCB2 gallates on T cell functions. In the present study, murine splenocytes were isolated and treated with PCB2 or PCB2 gallates in the presence of an anti-CD3 monoclonal antibody (mAb). PCB2 gallates, but not PCB2, inhibited proliferation and T cell activation of splenocytes after stimulation with the anti-CD3 mAb...
January 12, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28088614/ccaat-enhancer-binding-protein-%C3%AE-promotes-pathogenesis-of-eae
#3
Michelle R Simpson-Abelson, Gerard Hernandez-Mir, Erin E Childs, J Agustin Cruz, Amanda C Poholek, Ansuman Chattopadhyay, Sarah L Gaffen, Mandy J McGeachy
The CCAAT/Enhancer Binding Protein β (C/EBPβ) transcription factor is activated by multiple inflammatory stimuli, including IL-17 and LPS, and C/EBPβ itself regulates numerous genes involved in inflammation. However, the role of C/EBPβ in driving autoimmunity is not well understood. Here, we demonstrate that Cebpb(-/-) mice are resistant to EAE. Cebpb(-/-) mice exhibited reduced lymphocyte and APC infiltration into CNS following EAE induction. Furthermore, MOG-induced Th17 cytokine production was impaired in draining LN, indicating defects in Th17 cell priming...
January 12, 2017: Cytokine
https://www.readbyqxmd.com/read/28087917/-reasearch-progress-on-the-role-of-neutrophils-in-asthma
#4
Tingting Li, Yuehai Ke, Hongqiang Cheng
Asthma is a phenotypically heterogeneous chronic disease of the airways. Studies have found that neutrophils are crucial to airway inflammation in acute asthma, persistent asthma, particularly in asthma of poor response to glucocorticoid treatment. The role of neutrophils in development of bronchial asthma is complex, as they can release a potent source of cytokines and inflammatory mediators participating in asthma. Differing from eosinophilic inflammatory asthma, neutrophilic inflammatory asthma is not depend on helper T (Th)2 cells, but may be related to Th1 and Th17 cells...
May 25, 2016: Zhejiang da Xue Xue Bao. Yi Xue Ban, Journal of Zhejiang University. Medical Sciences
https://www.readbyqxmd.com/read/28087664/human-blood-cd1c-dendritic-cells-encompass-cd5high-and-cd5low-subsets-that-differ-significantly-in-phenotype-gene-expression-and-functions
#5
Xiangyun Yin, Haisheng Yu, Xiaoyang Jin, Jingyun Li, Hao Guo, Quanxing Shi, Zhao Yin, Yong Xu, Xuefei Wang, Rong Liu, Shouli Wang, Liguo Zhang
There are three major dendritic cell (DC) subsets in both humans and mice, that is, plasmacytoid DCs and two types of conventional DCs (cDCs), cDC1s and cDC2s. cDC2s are important for polarizing CD4(+) naive T cells into different subsets, including Th1, Th2, Th17, Th22, and regulatory T cells. In mice, cDC2s can be further divided into phenotypically and functionally distinct subgroups. However, subsets of human cDC2s have not been reported. In the present study, we showed that human blood CD1c(+) cDCs (cDC2s) can be further separated into two subpopulations according to their CD5 expression status...
January 13, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28087239/on-going-mechanical-damage-from-mastication-drives-homeostatic-th17-cell-responses-at-the-oral-barrier
#6
Nicolas Dutzan, Loreto Abusleme, Hayley Bridgeman, Teresa Greenwell-Wild, Tamsin Zangerle-Murray, Mark E Fife, Nicolas Bouladoux, Holly Linley, Laurie Brenchley, Kelly Wemyss, Gloria Calderon, Bo-Young Hong, Timothy J Break, Dawn M E Bowdish, Michail S Lionakis, Simon A Jones, Giorgio Trinchieri, Patricia I Diaz, Yasmine Belkaid, Joanne E Konkel, Niki M Moutsopoulos
Immuno-surveillance networks operating at barrier sites are tuned by local tissue cues to ensure effective immunity. Site-specific commensal bacteria provide key signals ensuring host defense in the skin and gut. However, how the oral microbiome and tissue-specific signals balance immunity and regulation at the gingiva, a key oral barrier, remains minimally explored. In contrast to the skin and gut, we demonstrate that gingiva-resident T helper 17 (Th17) cells developed via a commensal colonization-independent mechanism...
January 6, 2017: Immunity
https://www.readbyqxmd.com/read/28086772/scutellaria-barbata-d-don-extract-inhibits-the-tumor-growth-through-down-regulating-of-treg-cells-and-manipulating-th1-th17-immune-response-in-hepatoma-h22-bearing-mice
#7
Xuefeng Kan, Wanli Zhang, Ruxu You, Yanfeng Niu, Jianrong Guo, Jun Xue
BACKGROUND: Previous studies showed Scutellaria barbata D. Don extract (SBE) is a potent inhibitor in hepatoma and could improve immune function of hepatoma H22-bearing mice. However, the immunomodulatory function of SBE on the tumor growth of hepatoma remains unclear. This study aimed to investigate the anti-tumor effects of SBE on hepatoma H22-bearing mice and explore the underlying immunomodulatory function. METHODS: The hepatoma H22-bearing mice were treated by SBE for 30 days...
January 13, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28080210/pathogen-control-at-the-intestinal-mucosa-h2o2-to-the-rescue
#8
Ulla G Knaus, Rosanne Hertzberger, Gratiela G Pircalabioru, S Parsa M Yousefi, Filipe Branco Dos Santos
Intestinal infections are a global challenge, connected to malnutrition and inadequate hygiene in developing countries, and to expanding antibiotic resistance in developed countries. In general, a healthy host is capable of fighting off gut pathogens or at least to recover from infections quickly. The underlying protective mechanism, termed colonization resistance, is provided by indigenous commensal communities (microbiota) that are shaped and aided by the host's epithelial and innate immune system. (1) Commensal-pathogen interactions are governed by competition for a suitable niche for replication and stable colonization, nutrient availability, species-specific alterations of the metabolic environment, changes in oxygen tension and release of chemicals and proteinaceous toxins (bacteriocins)...
January 12, 2017: Gut Microbes
https://www.readbyqxmd.com/read/28078565/the-influence-of-sodium-on-pathophysiology-of-multiple-sclerosis
#9
REVIEW
Jacek Zostawa, Jowita Adamczyk, Paweł Sowa, Monika Adamczyk-Sowa
Multiple sclerosis (MS) is a chronic, inflammatory, autoimmune disease of the central nervous system, and is an important cause of disability in young adults. In genetically susceptible individuals, several environmental factors may play a partial role in the pathogenesis of MS. Some studies suggests that high-salt diet (>5 g/day) may contribute to the MS and other autoimmune disease development through the induction of pathogenic Th17 cells and pro-inflammatory cytokines in both humans and mice. However, the precise mechanisms of pro-inflammatory effect of sodium chloride intake are not yet explained...
January 11, 2017: Neurological Sciences
https://www.readbyqxmd.com/read/28077684/targeting-aurora-kinase-a-and-jak2-prevents-gvhd-while-maintaining-treg-and-antitumor-ctl-function
#10
Brian C Betts, Anandharaman Veerapathran, Joseph Pidala, Hua Yang, Pedro Horna, Kelly Walton, Christopher L Cubitt, Steven Gunawan, Harshani R Lawrence, Nicholas J Lawrence, Said M Sebti, Claudio Anasetti
Graft-versus-host disease (GVHD) is a leading cause of nonrelapse mortality after allogeneic hematopoietic cell transplantation. T cell costimulation by CD28 contributes to GVHD, but prevention is incomplete when targeting CD28, downstream mammalian target of rapamycin (mTOR), or Aurora A. Likewise, interleukin-6 (IL-6)-mediated Janus kinase 2 (JAK2) signaling promotes alloreactivity, yet JAK2 inhibition does not eliminate GVHD. We provide evidence that blocking Aurora A and JAK2 in human T cells is synergistic in vitro, prevents xenogeneic GVHD, and maintains antitumor responses by cytotoxic T lymphocytes (CTLs)...
January 11, 2017: Science Translational Medicine
https://www.readbyqxmd.com/read/28077598/notch-ligand-delta-like-4-promotes-regulatory-t-cell-identity-in-pulmonary-viral-infection
#11
Hung-An Ting, Matthew A Schaller, Denise E de Almeida Nagata, Andrew J Rasky, Ivan P Maillard, Nicholas W Lukacs
Regulatory T (Treg) cells establish tolerance, prevent inflammation at mucosal surfaces, and regulate immunopathology during infectious responses. Recent studies have shown that Delta-like ligand 4 (Dll4) was upregulated on APC after respiratory syncytial virus (RSV) infection, and its inhibition leads to exaggerated immunopathology. In the present study, we outline the role of Dll4 in Treg cell differentiation, stability, and function in RSV infection. We found that Dll4 was expressed on CD11b(+) pulmonary dendritic cells in the lung and draining lymph nodes in wild-type BALB/c mice after RSV infection...
January 11, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28077577/extracellular-microrna-signature-of-human-helper-t-cell-subsets-in-health-and-autoimmunity
#12
Anna Torri, Donatella Carpi, Elisabetta Bulgheroni, Maria-Cristina Crosti, Monica Moro, Paola Gruarin, Riccardo L Rossi, Grazisa Rossetti, Dolores Di Vizio, Mirjam Hoxha, Valentina Bollati, Cristina Gagliani, Carlo Tacchetti, Moira Paroni, Jens Geginat, Laura Corti, Luigia Venegoni, Emilio Berti, Massimiliano Pagani, Giuseppe Matarese, Sergio Abrignani, Paola de Candia
Upon TCR stimulation, CD4+ T lymphocytes release extracellular vesicles (EVs) containing microRNAs. However, no data are available on whether human CD4+ T cell subsets release EVs containing different pattern of microRNAs. The present work aimed at filling this gap by assessing the microRNA content in EVs released upon in vitro TCR stimulation of Th1, Th17 and T regulatory (Treg) cells. Our results indicate that EVs released by Treg cells are significantly different compared to those released by the other subsets...
January 11, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28076390/il-37-confers-protection-against-mycobacterial-infection-involving-suppressing-inflammation-and-modulating-t-cell-activation
#13
Haipeng Liu, Ruijuan Zheng, Peng Wang, Hua Yang, Xin He, Qun Ji, Wenjuan Bai, Hao Chen, Jianxia Chen, Wenxia Peng, Siyu Liu, Zhonghua Liu, Baoxue Ge
Interleukin-37 (IL-37), a novel member of the IL-1 family, plays fundamental immunosuppressive roles by broadly reducing both innate inflammation and acquired immunity, but whether it is involved in the pathogenesis of tuberculosis (TB) has not been clearly elucidated. In this study, single nucleotide polymorphism (SNP) analysis demonstrated an association of the genetic variant rs3811047 of IL-37 with TB susceptibility. In line with previous report, a significant elevated IL-37 abundance in the sera and increased expression of IL-37 protein in the peripheral blood mononuclear cells (PBMC) were observed in TB patients in comparison to healthy controls...
2017: PloS One
https://www.readbyqxmd.com/read/28075473/spirulina-lipopolysaccharides-inhibit-tumor-growth-in-a-toll-like-receptor-4-dependent-manner-by-altering-the-cytokine-milieu-from-interleukin-17-interleukin-23-to-interferon-%C3%AE
#14
Hiromi Okuyama, Akira Tominaga, Satoshi Fukuoka, Takahiro Taguchi, Yutaka Kusumoto, Shiro Ono
Th17 cells and the cytokine they produce, interleukin (IL)-17, play an important role in tumor progression in humans and in mice. IL-6 and IL-23 are critical cytokines for the differentiation and propagation of Th17 cells, respectively. Bacterial lipopolysaccharides (LPS) are known to stimulate immune cells to produce such inflammatory cytokines. Contrary to Escherichia coli (E. coli) LPS, LPS from Spirulina has low toxicity and barely induces in vivo production of IL-6 and IL-23 in mice. We examined the antitumor effects of Spirulina LPS compared to E...
January 2, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28074676/potential-route-of-th17-treg-cell-dynamics-in-targeting-type-1-diabetes-and-rheumatoid-arthritis-an-autoimmune-disorder-perspective
#15
Suresh Kumar Karri, A Sheela
Cytokines, small secreted proteins, have a specific effect on the interactions and communications between cells. They play a pivotal role in the pathogenesis of autoimmune diseases. Factors in the breakdown of self-tolerance and the subsequent events leading to the induction of pathogenic responses remain unclear for most of the autoimmune diseases. Large numbers of studies have revealed a general scheme in which pro-inflammatory cytokines contribute to the initiation and propagation of autoimmune inflammation, whereas anti-inflammatory cytokines facilitate the regression of inflammation and thereby recovery from the disease...
January 11, 2017: British Journal of Biomedical Science
https://www.readbyqxmd.com/read/28073043/periplocoside-a-ameliorated-type-ii-collagen-induced-arthritis-in-mice-via-regulation-of-the-balance-of-th17-treg-cells
#16
Yang Yang, Xudong Hu, Lei Cheng, Wei Tang, Weimin Zhao, Yifu Yang, Jianping Zuo
Periplocoside A (PSA) has been extracted from the Chinese herbal medicine Periplocasepium Bge to treat rheumatoid arthritis (RA) via immune regulation. We previously found that PSA exhibits immunosuppressive activity both in vitro and in vivo. Balanced regulation of helper T 17 (Th17)/regulatory T (Treg) cells is the current therapeutic direction for the treatment of RA. The present study investigated the mechanism of PSA in treating collagen-induced arthritis (CIA). The therapeutic effects and potential pharmacological mechanisms of PSA were specifically clarified by examining its effects on CIA in DBA/1 mice...
January 7, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28071693/ik-acts-as-an-immunoregulator-of-inflammatory-arthritis-by-suppressing-th17-cell-differentiation-and-macrophage-activation
#17
Hye-Lim Park, Sang-Myeong Lee, Jun-Ki Min, Su-Jin Moon, Inki Kim, Kyung-Won Kang, Sooho Park, SeulGi Choi, Ha-Na Jung, Dong-Hee Lee, Jae-Hwan Nam
Pathogenic T helper cells (TH) and macrophages have been implicated in the development of rheumatoid arthritis (RA), which can lead to severe synovial inflammation and bone destruction. A range of therapies have been widely used for RA, including specific monoclonal antibodies and chemical inhibitors against inflammatory cytokines produced by these cells. However, these have not been sufficient to meet the medical need. Here, we show that in transgenic mice expressing truncated IK (tIK) cytokine, inflammatory arthritis symptoms were ameliorated as the result of suppression of the differentiation of TH1 and TH17 cells and of macrophage activation...
January 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28069426/impaired-nk-cell-functions-in-patients-with-stat1-gain-of-function-mutations
#18
Giovanna Tabellini, Donatella Vairo, Omar Scomodon, Nicola Tamassia, Rosalba Monica Ferraro, Ornella Patrizi, Sara Gasperini, Annarosa Soresina, Giuliana Giardino, Claudio Pignata, Vassilios Lougaris, Alessandro Plebani, Laura Dotta, Marco A Cassatella, Silvia Parolini, Raffaele Badolato
BACKGROUND: Gain-of-function (GOF) mutations affecting the coiled-coil domain or the DNA-binding domain of the Signal Transducer and Activator of Transcription 1 (STAT1) cause chronic mucocutaneous candidiasis disease (CMCD). This condition is characterized by fungal and bacterial infections due to impaired generation of Th17 cells; meanwhile some CMCD patients may also develop viral or intracellular pathogens infections. OBJECTIVE: To Investigate the effect of GOF-STAT1 mutations on functioning of Natural Killer (NK) cells...
January 6, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28067059/il-23-blockade-for-crohn-s-disease-next-generation-of-anti-cytokine-therapy
#19
Federica Furfaro, Daniela Gilardi, Mariangela Allocca, Clelia Cicerone, Carmen Correale, Gionata Fiorino, Silvio Danese
Adaptive immunity in intestinal inflammation may play a key role in the pathogenesis of Crohn's disease. In particular, interleukin (IL)-23 may be a key mediator in chronic intestinal inflammation by inducing the differentiation of naïve CD4+ T cells into Th17, with the production of several pro-inflammatory cytokines. Furthermore, IL-23 induces interferon-γ (IFN- γ) production from activated T cells, a critical cytokine in innate and adaptive immunity against infections. Areas covered: We aim to review the available data from literature regarding the role of IL-23, with a more specific focus on the recent progresses in the therapeutic modulation of this cytokine...
January 9, 2017: Expert Review of Clinical Immunology
https://www.readbyqxmd.com/read/28065853/sitagliptin-inhibit-human-lymphocytes-proliferation-and-th1-th17-differentiation-in-vitro
#20
Marcelo Maia Pinheiro, Caroline Lais Stoppa, Claudete Justina Valduga, Cristina Eunice Okuyama, Renata Gorjão, Regina Mara Silva Pereira, Susana Nogueira Diniz
Dipeptidyl peptidase-4 (DPP-4) inhibitors are a new class of anti-diabetic agents that are widely used in clinical practice to improve glycemic control in patients with type 2 diabetes. DPP-4 is also known as lymphocyte cell surface protein, CD26, and plays an important role in T-cell immunity. Recent studies suggest that DPP-4 inhibitors improve beta-cell function and attenuate autoimmunity in type 1 diabetic mouse models. To investigate the direct effect of DPP4 in immune response, human peripheral blood mononuclear cells (PBMC) from healthy volunteers were obtained by Ficoll gradient and cultivated in the absence (control) or presence of phytohemagglutinin (PHA), or stimulated with PHA and treated with sitagliptin...
January 5, 2017: European Journal of Pharmaceutical Sciences
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