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https://www.readbyqxmd.com/read/28710773/reciprocal-modulation-of-helper-th1-and-th17-cells-by-the-%C3%AE-2-adrenergic-receptor-agonist-drug-terbutaline
#1
Catalina M Carvajal Gonczi, Mahdieh Tabatabaei Shafiei, Ashley East, Erika Martire, Meagane H I Maurice-Ventouris, Peter J Darlington
Catecholamine hormones are powerful regulators of the immune system produced by the sympathetic nervous system. They regulate the adaptive immune system by altering T cell differentiation into T helper (Th) 1 and Th2 cell subsets, but the effect on Th17 cells is not known. Th17 cells, defined in part by chemokine receptor CCR6 and cytokine IL-17A, are crucial for mediating certain pathogen-specific responses, and are linked with several autoimmune diseases. We demonstrated that a proportion of human Th17 cells express β2-adrenergic receptor, a G protein coupled receptor that responds to catecholamines...
July 15, 2017: FEBS Journal
https://www.readbyqxmd.com/read/28708859/interleukin-17a-induced-production-of-acute-serum-amyloid-a-by-keratinocytes-contributes-to-psoriasis-pathogenesis
#2
Elodie Couderc, Franck Morel, Pierre Levillain, Amandine Buffière-Morgado, Magalie Camus, Camille Paquier, Charles Bodet, Jean-François Jégou, Mathilde Pohin, Laure Favot, Martine Garcia, Vincent Huguier, Jiad Mcheik, Corinne Lacombe, Hans Yssel, Gérard Guillet, François-Xavier Bernard, Jean-Claude Lecron
BACKGROUND: Acute-serum Amyloid A (A-SAA), one of the major acute-phase proteins, is mainly produced in the liver but extra-hepatic synthesis involving the skin has been reported. Its expression is regulated by the transcription factors NF-κB, C/EBPβ, STAT3 activated by proinflammatory cytokines. OBJECTIVES: We investigated A-SAA synthesis by resting and cytokine-activated Normal Human Epidermal Keratinocytes (NHEK), and their inflammatory response to A-SAA stimulation...
2017: PloS One
https://www.readbyqxmd.com/read/28684423/the-rna-binding-protein-hur-contributes-to-neuroinflammation-by-promoting-c-c-chemokine-receptor-6-ccr6-expression-on-th17-cells
#3
Jing Chen, Jennifer L Martindale, Carole Cramer, Myriam Gorospe, Ulus Atasoy, Paul D Drew, Shiguang Yu
In both multiple sclerosis and experimental autoimmune encephalomyelitis (EAE), the C C chemokine receptor 6 (CCR6) is critical for pathogenic T helper 17 (Th17) cell migration to the central nervous system (CNS). While many cytokines and their receptors are potently regulated via posttranscriptional mechanisms in response to various stimuli, how CCR6 expression is posttranscriptionally regulated in Th17 cells is unknown. Here, using RNA binding protein HuR conditional knockout (KO) and wild type (WT) mice, we present evidence that HuR posttranscriptionally regulates CCR6 expression by binding to and stabilizing Ccr6 mRNA and by promoting CCR6 translation...
July 6, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28674001/delineation-of-an-immunosuppressive-gradient-in-hepatocellular-carcinoma-using-high-dimensional-proteomic-and-transcriptomic-analyses
#4
Valerie Chew, Liyun Lai, Lu Pan, Chun Jye Lim, Juntao Li, Raymond Ong, Camillus Chua, Jing Yao Leong, Kiat Hon Lim, Han Chong Toh, Ser Yee Lee, Chung Yip Chan, Brian K P Goh, Alexander Chung, Pierce K H Chow, Salvatore Albani
The recent development of immunotherapy as a cancer treatment has proved effective over recent years, but the precise dynamics between the tumor microenvironment (TME), nontumor microenvironment (NTME), and the systemic immune system remain elusive. Here, we interrogated these compartments in hepatocellular carcinoma (HCC) using high-dimensional proteomic and transcriptomic analyses. By time-of-flight mass cytometry, we found that the TME was enriched in regulatory T cells (Tregs), tissue resident memory CD8(+) T cells (TRMs), resident natural killer cells (NKRs), and tumor-associated macrophages (TAMs)...
July 3, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28672408/ginger-extract-modulates-the-expression-of-chemokines-ccl20-and-ccl22-and-their-receptors-ccr6-and-ccr4-in-the-central-nervous-system-of-mice-with-experimental-autoimmune-encephalomyelitis
#5
Abdollah Jafarzadeh, Zahra Arabi, Rayhaneh Ahangar-Parvin, Marziyeh Mohammadi-Kordkhayli, Maryam Nemati
Background Chemokines facilitate the leukocytes infiltration into the central nervous system (CNS) which is an essential step in the pathogenesis of multiple sclerosis. Ginger has also a broad anti-inflammatory properties. The aim was to evaluate the effects of ginger extract on the expression of CCL20 and CCL22 and their receptors (CCR6 and CCR4, respectively) in experimental autoimmune encephalomyelitis (EAE). Material and Methods Female C57BL/6 mice used for EAE induction by immunization with myelin oligodendroglial glycoprotein...
July 3, 2017: Drug Research
https://www.readbyqxmd.com/read/28650992/galectin-8-as-an-immunosuppressor-in-experimental-autoimmune-encephalomyelitis-and-a-target-of-human-early-prognostic-antibodies-in-multiple-sclerosis
#6
Evelyn Pardo, Claudia Cárcamo, Reinaldo Uribe-San Martín, Ethel Ciampi, Fabián Segovia-Miranda, Cristobal Curkovic-Peña, Fabián Montecino, Christopher Holmes, Juan Enrique Tichauer, Eric Acuña, Francisco Osorio-Barrios, Marjorie Castro, Priscilla Cortes, Claudia Oyanadel, David M Valenzuela, Rodrigo Pacheco, Rodrigo Naves, Andrea Soza, Alfonso González
Galectin-8 (Gal-8) is a member of a glycan-binding protein family that regulates the immune system, among other functions, and is a target of antibodies in autoimmune disorders. However, its role in multiple sclerosis (MS), an autoimmune inflammatory disease of the central nervous system (CNS), remains unknown. We study the consequences of Gal-8 silencing on lymphocyte subpopulations and the development of experimental autoimmune encephalitis (EAE), to then assess the presence and clinical meaning of anti-Gal-8 antibodies in MS patients...
2017: PloS One
https://www.readbyqxmd.com/read/28615072/chemokine-receptor-co-expression-reveals-aberrantly-distributed-th-effector-memory-cells-in-gpa-patients
#7
Lucas L Lintermans, Abraham Rutgers, Coen A Stegeman, Peter Heeringa, Wayel H Abdulahad
BACKGROUND: Persistent expansion of circulating CD4(+) effector memory T cells (TEM) in patients with granulomatosis with polyangiitis (GPA) suggests their fundamental role in disease pathogenesis. Recent studies have shown that distinct functional CD4(+) TEM cell subsets can be identified based on expression patterns of chemokine receptors. The current study aimed to determine different CD4(+) TEM cell subsets based on chemokine receptor expression in peripheral blood of GPA patients...
June 14, 2017: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/28611085/ccr6-cc-chemokine-receptor-6-is-essential-for-the-migration-of-detrimental-natural-interleukin-17-producing-%C3%AE-%C3%AE-t-cells-in-stroke
#8
Priyadharshini Arunachalam, Peter Ludewig, Patrick Melich, Thiruma Valavan Arumugam, Christian Gerloff, Immo Prinz, Tim Magnus, Mathias Gelderblom
BACKGROUND AND PURPOSE: Immune-mediated tissue damage after stroke evolves within the first days, and lymphocytes contribute to the secondary injury. Our goal was to identify T-cell subpopulations, which trigger the immune response. METHODS: In a model of experimental stroke, we analyzed the immune phenotype of interleukin-17 (IL-17)-producing γδ T cells and explored the therapeutic potential of neutralizing anti-IL-17 antibodies in combination with mild therapeutic hypothermia...
June 13, 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/28607111/a-distinct-inhibitory-function-for-mir-18a-in-th17-cell-differentiation
#9
Misty M Montoya, Julia Maul, Priti B Singh, Heather H Pua, Frank Dahlström, Nanyan Wu, Xiaozhu Huang, K Mark Ansel, Dirk Baumjohann
Th17 cell responses orchestrate immunity against extracellular pathogens but also underlie autoimmune disease pathogenesis. In this study, we uncovered a distinct and critical role for miR-18a in limiting Th17 cell differentiation. miR-18a was the most dynamically upregulated microRNA of the miR-17-92 cluster in activated T cells. miR-18a deficiency enhanced CCR6(+) RAR-related orphan receptor (ROR)γt(+) Th17 cell differentiation in vitro and increased the number of tissue Th17 cells expressing CCR6, RORγt, and IL-17A in airway inflammation models in vivo...
July 15, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28600287/enrichment-of-human-ccr6-regulatory-t-cells-with-superior-suppressive-activity-in-oral-cancer
#10
Jang-Jaer Lee, Kung-Chi Kao, Yen-Ling Chiu, Chiau-Jing Jung, Chung-Ji Liu, Shih-Jung Cheng, Yen-Liang Chang, Jenq-Yuh Ko, Jean-San Chia
Human oral squamous cell carcinoma (OSCC) constitutes an inflammatory microenvironment enriched with chemokines such as CCL20, which promote cancer cell invasion and tumor progression. We found that in OSCC there is a correlation between the expression of CCL20 and FOXP3 mRNA. Therefore, we hypothesized that OSCC may favor the recruitment and retention of regulatory T (Treg) cells that express the CCL20 receptor, CCR6. Interestingly, most (∼60%) peripheral blood Treg cells express CCR6, and CCR6(+) Treg cells exhibit an activated effector/memory phenotype...
June 9, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28599122/respiratory-syncytial-virus-infection-compromises-asthma-tolerance-by-recruiting-interleukin-17a-producing-cells-via-ccr6-ccl20-signaling
#11
Tianyun Shi, Yanchao He, Wei Sun, Yi Wu, Ling Li, Zhijun Jie, Xiao Su
Asthma tolerance can be induced by breast-feeding or oral feeding with ovalbumin (OVA). Anergy or deletion of specific T cells and generation of T regulatory cells might contribute to this process. However, whether respiratory syncytial virus (RSV) infection would affect asthma tolerance is not very clear. Here, we first established asthma and oral tolerance mouse models and then analyzed airway hypersensitivity and asthma-related genes in the lung, CCR6-expressing IL-17A(+) cells in the lungs, hilar or mesenteric lymph nodes (HLN or MLN) among control, asthmatic, tolerized, RSV infection, and RSV-infected asthmatic and tolerized groups...
June 6, 2017: Molecular Immunology
https://www.readbyqxmd.com/read/28580944/il-17-producing-%C3%AE-%C3%AE-t-cells-switch-migratory-patterns-between-resting-and-activated-states
#12
Duncan R McKenzie, Ervin E Kara, Cameron R Bastow, Timona S Tyllis, Kevin A Fenix, Carly E Gregor, Jasmine J Wilson, Rachelle Babb, James C Paton, Axel Kallies, Stephen L Nutt, Anne Brüstle, Matthias Mack, Iain Comerford, Shaun R McColl
Interleukin 17-producing γδ T (γδT17) cells have unconventional trafficking characteristics, residing in mucocutaneous tissues but also homing into inflamed tissues via circulation. Despite being fundamental to γδT17-driven early protective immunity and exacerbation of autoimmunity and cancer, migratory cues controlling γδT17 cell positioning in barrier tissues and recruitment to inflammatory sites are still unclear. Here we show that γδT17 cells constitutively express chemokine receptors CCR6 and CCR2...
June 5, 2017: Nature Communications
https://www.readbyqxmd.com/read/28569167/increased-serum-concentrations-of-il-1-beta-il-21-and-th17-cells-in-overweight-patients-with-rheumatoid-arthritis
#13
Hirofumi Shoda, Yasuo Nagafuchi, Yumi Tsuchida, Keiichi Sakurai, Shuji Sumitomo, Keishi Fujio, Kazuhiko Yamamoto
BACKGROUNDS: Obesity is associated with worse disease activity and drug responses in patients with rheumatoid arthritis (RA). However, the immunological mechanisms responsible for the relationship between RA and obesity have not yet been clarified in detail. This study aimed to elucidate the immunological mechanisms contributing to the pathogenesis of RA in overweight patients. METHODS: The frequencies of CD4(+) T cell, B cell and monocyte subsets were analyzed in RA (n = 81) and healthy donors (n = 99) by flow cytometry, and were compared between three groups (body mass index (BMI) <20,  ≥20 to 25, >25)...
May 31, 2017: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/28567554/erratum-to-expression-of-ccr6-on-b-cells-in-systemic-lupus-erythematosus-patients
#14
Adrian Y S Lee, Jennifer L Bannan, Murray J Adams, Heinrich Körner
No abstract text is available yet for this article.
May 31, 2017: Clinical Rheumatology
https://www.readbyqxmd.com/read/28564491/abatacept-attenuates-t-follicular-helper-cell-dependent-b-cell-hyperactivity-in-primary-sj%C3%A3-gren-s-syndrome
#15
Gwenny M Verstappen, Petra M Meiners, Odilia B J Corneth, Annie Visser, Suzanne Arends, Wayel H Abdulahad, Rudi W Hendriks, Arjan Vissink, Frans G M Kroese, Hendrika Bootsma
Objective To assess the effect of abatacept (CTLA-4-Ig), which limits T-cell activation, on homeostasis of CD4(+) T-cell subsets and T-cell-dependent B-cell hyperactivity in patients with primary Sjögren's syndrome (pSS). Methods Fifteen pSS patients treated with abatacept were included. Circulating CD4(+) T-cell and B-cell subsets were analyzed by flow cytometry at baseline, on treatment and off treatment. CD4(+) effector T-cell subsets and T regulatory (Treg)-cells were identified based on expression of CD45RA, CXCR3, CCR6, CCR4, CXCR5, programmed death-1 (PD-1), inducible costimulator (ICOS) and FoxP3...
May 31, 2017: Arthritis & Rheumatology
https://www.readbyqxmd.com/read/28560063/ccr6-b-lymphocytes-responding-to-tumor-cell-derived-ccl20-support-hepatocellular-carcinoma-progression-via-enhancing-angiogenesis
#16
Huan He, Jianxiong Wu, Mengya Zang, Weihu Wang, Xiuli Chang, Xiangmei Chen, Ruijun Wang, Zhiyuan Wu, Liming Wang, Dongmei Wang, Fengmin Lu, Zongtang Sun, Chunfeng Qu
BACKGROUND & AIMS: Different immune cells in tumor microenvironment shape tumor progression. CCL20 over-expression was reported as one of the "stemness" trait in TP53 mutated hepatocellular carcinoma (HCC). We aimed to understand the effect of CCL20 on HCC progression. METHODS: In two HCC cohort patients (n=95, n=85 respectively), serum CCL20 concentration was quantified by using ELISA. Expressions of CCL20 and CCR6 in 41 paired HCC tumor and adjacent non-tumor tissues were determined by quantitative Real-Time PCR, confirmed by immunohistochemistry (CCL20) or by flow cytometry analysis (CCR6)...
2017: American Journal of Cancer Research
https://www.readbyqxmd.com/read/28554560/th1-phenotype-of-t-follicular-helper-cells-indicates-an-ifn%C3%AE-associated-immune-dysregulation-in-cd21low-cvid-patients
#17
Susanne Unger, Maximilian Seidl, Pauline van Schouwenburg, Mirzokhid Rakhmanov, Alla Bulashevska, Natalie Frede, Bodo Grimbacher, Jens Pfeiffer, Klaudia Schrenk, Luis Munoz, Leif Hanitsch, Ina Stumpf, Fabian Kaiser, Oliver Hausmann, Florian Kollert, Sigune Goldacker, Mirjam van der Burg, Baerbel Keller, Klaus Warnatz
BACKGROUND: A subgroup of patients with Common Variable Immunodeficiency (CVID) suffers from immune dysregulation, manifesting as autoimmunity, lymphoproliferation and organ inflammation, and thereby increasing morbidity and mortality. Therefore, treatment of these complications demands a deeper comprehension of their etiology and pathophysiology. OBJECTIVES: Based on the identification of an Interferon (IFN) signature in CVID patients with secondary complications and a skewed T follicular helper cell (TFH) differentiation in defined monogenic immunodeficiencies, we sought to determine the profile of CD4 memory T cells in blood and secondary lymphatic tissues of these patients...
May 26, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28552941/ccl20-secreted-from-iga1-stimulated-human-mesangial-cells-recruits-inflammatory-th17-cells-in-iga-nephropathy
#18
Guoyuan Lu, Xiaopan Zhang, Lei Shen, Qing Qiao, Yuan Li, Jieqiong Sun, Jinping Zhang
IgA nephropathy (IgAN) is the most common primary glomerulonephritis characterized by human mesangial cells (HMC) proliferation and extracellular matrix expansion associated with immune deposits consisting of galactose-deficient IgA1. However, how IgA1 contributes to IgAN has yet to be completely elucidated. In this study, the expression profile of chemokines was more altered in IgA1-treated HMC than in the control group. CCL20 was significantly higher either in the serum of IgAN patients or in IgA1-treated HMC...
2017: PloS One
https://www.readbyqxmd.com/read/28549988/regulatory-t-cell-populations-in-children-are-affected-by-age-and-food-allergy-diagnosis
#19
Benjamin T Prince, Ashley L Devonshire, Kristin A Erickson, Jenna Bergerson, Dalia Fuleihan, Christine Szychlinski, Robert P Schleimer, Paul J Bryce, Anne Marie Singh
No abstract text is available yet for this article.
May 23, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28535889/unbalanced-expression-of-aryl-hydrocarbon-receptor-in-peripheral-blood-ccr6-cd4-and-cd4-cd25-t-cells-of-rheumatoid-arthritis
#20
Lin Cheng, Long Qian, Yue Tan, Guo-Sheng Wang, Xiao-Mei Li, Xiang-Pei Li, Chao-Yin Luo
OBJECTIVE: The goal of this study was to analyze the role of aryl hydrocarbon receptor in peripheral blood CCR6(+)CD4(+) and CD4(+)CD25(+)T cells of patients with rheumatoid arthritis. METHODS: Flow cytometry was applied to determine the proportion of AhR positive cells in CCR6(+)CD4(+)T, CD4(+)CD25(+)T and peripheral blood peripheral mononuclear cells from each subject. AhR mRNA and CYP1A1 mRNA relative expression levels were tested by real-time PCR. RESULTS: The percentage of AhR positive cells in peripheral blood mononuclear cells was higher in RA group than that in healthy cases [(35...
May 2017: Revista Brasileira de Reumatologia
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