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Th17 cells

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https://www.readbyqxmd.com/read/27933701/ccr2-mediates-helicobacter-pylori-induced-immune-tolerance-and-contributes-to-mucosal-homeostasis
#1
Xia Sun, Min Zhang, Mohamad El-Zaatari, Gray B Huffnagle, John Y Kao
BACKGROUND: We previously demonstrated that H. pylori infection leads to increased induction of regulatory T cells in local and systemic immune compartments. Here, we investigate the role of CCR2 in the tolerogenic programing of dendritic cells in a mouse model of H. pylori infection. MATERIALS AND METHODS: CCR2 deficient (CCR2KO) mice and wild-type (Wt) mice infected with H. pylori SS1 strain were analyzed by qPCR and FACS analysis. In vitro, bone marrow-derived DC on day 6 from CCR2KO and Wt mice cocultured with or without H...
December 8, 2016: Helicobacter
https://www.readbyqxmd.com/read/27933513/effect-of-yiqi-tongyang-decoction-on-blood-t-cell-subsets-in-patients-with-chronic-immune-thrombocytopenia
#2
Xiu-Peng Yang, Rou Ma, Xiao-Hong Yang, Hui-Lan Zhu, Yong-Gang Xu
OBJECTIVE: To measure the proportions of blood T cell subsets, Th1, Th2, Th17, Th22, and Treg cells, and other parameters in patients with chronic immune thrombocytopenia (CITP) before and after treatment with Yiqi Tongyang Decoction (, YTD) to explore T cell status of patients with CITP, and to define the mechanism of action of YTD. METHODS: The changes in peripheral blood T lymphocyte subsets, and those of Th1, Th2, Th17, Th22, and Treg cells in 30 patients with CITP (22 females and 8 males) were analyzed using multiparametric flow cytometry before and after treatment with YTD for 6 months, and 26 healthy volunteers (14 males and 12 females) acted as a control...
December 9, 2016: Chinese Journal of Integrative Medicine
https://www.readbyqxmd.com/read/27932286/imbalance-of-th17-and-treg-in-peripheral-blood-mononuclear-cells-of-active-tuberculosis-patients
#3
Jie Luo, Mingxu Zhang, Baosong Yan, Kejun Zhang, Ming Chen, Shaoli Deng
OBJECTIVE: Maintaining a right balance between Th17 and Treg might be critical to the immunopathogenesis of active tuberculosis (TB). This study aimed to assess whether the Th17/Treg balance is altered in active TB patients. METHODS: 250 study subjects (90 active TB patients, 80 latent TB subjects, and 80 healthy controls) were recruited for the study. The expression of Th17 and Treg in peripheral blood mononuclear cells (PBMCs) in the 250 subjects was investigated by flow cytometry...
December 5, 2016: Brazilian Journal of Infectious Diseases
https://www.readbyqxmd.com/read/27932123/serum-levels-of-interleukin-34-during-acute-rejection-in-liver-transplantation
#4
D San Segundo, P Ruiz, J Irure, M T Arias-Loste, A Cuadrado, A Puente, F Casafont, M López-Hoyos, J Crespo, E Fábrega
INTRODUCTION: Accumulating evidence indicates that interleukin (IL)-34 participates in T-cell homeostasis and tolerance due to the ability of IL-34 to trigger apoptosis of Th1, Th17, and Tc1 cells, but spare Th2 cells and Treg. In addition, IL-34 exerts anti-inflammatory effects by impairing leukocyte adhesion and transendothelial migration, and reducing the secretion of proinflammatory cytokines. The aim of our study was to investigate the time course of serum levels of IL-34 during hepatic allograft rejection...
November 2016: Transplantation Proceedings
https://www.readbyqxmd.com/read/27931975/identification-of-il-17f-frequent-exacerbator-endotype-in-asthma
#5
Fabio L M Ricciardolo, Valentina Sorbello, Anna Folino, Fabio Gallo, Gian Mario Massaglia, Gabriella Favatà, Salvatore Conticello, Davide Vallese, Federica Gani, Mario Malerba, Gert Folkerts, Giovanni Rolla, Mirella Profita, Thais Mauad, Antonino Di Stefano, Giorgio Ciprandi
BACKGROUND: Severe asthma might be associated with neutrophil recruitment and Th17 cytokines over-expression in bronchial biopsies. OBJECTIVE: To study IL-17-related cytokines in nasal/bronchial biopsies from controls and mild (MA)-to-severe (SA) asthmatics in relation to exacerbation rate. METHODS: Inflammatory cells and IL-17A(+), IL-17F(+), IL-21(+), IL-22(+) and IL-23(+) cells were examined by immunohistochemistry (IHC) in cryostat sections of bronchial/nasal biopsies obtained from 33 SA (21 frequent exacerbators (FE)), 31 MA (3 FE) and 14 controls...
December 5, 2016: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/27931536/advances-in-atopic-dermatitis-in-2015
#6
REVIEW
Takashi Nomura, Kenji Kabashima
This review aims to highlight recently published articles on atopic dermatitis (AD). Updated are the insights into epidemiology, pathology, diagnostics, and therapy. Epidemiologic studies have revealed a positive correlation between AD and systemic conditions, such as rheumatoid arthritis, inflammatory bowel disease, and neonatal adiposity. Pathologic findings highlight the involvement of novel barrier factors (desmoplakin and claudin), novel immune cell subsets (pathogenic effector TH2 cells and group 2 innate lymphoid cells), and differential skewing of helper T cells (eg, TH17 dominance in Asians with AD)...
December 2016: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/27931518/vitamin-c-enhances-the-expression-of-il17-in-a-jmjd2-dependent-manner
#7
Mi Hye Song, Varun Sasidharan Nair, Kwon Ik Oh
Previously, we reported that vitamin C facilitates the CpG demethylation of Foxp3 enhancer in CD4+Foxp3+ regulatory T cells (Tregs) by enhancing the activity of a DNA demethylase ten-eleven-translocation (Tet). However, it is not clear whether vitamin C affects other helper T cell lineages like T helper type 17 (Th17) cells which are related with Tregs. Here, we show that the expression of interleukin-17A (IL17) increases with the treatment of vitamin C but not with other antioxidants. Interestingly, the upregulation of IL17 was not accompanied by DNA demethylation in Il17 promoter and was independent of Tet enzymes...
December 9, 2016: BMB Reports
https://www.readbyqxmd.com/read/27930541/cytotoxic-th1-and-th17-cells-infiltrate-the-intestinal-mucosa-of-behcet-patients-and-exhibit-high-levels-of-tnf-%C3%AE-in-early-phases-of-the-disease
#8
Giacomo Emmi, Elena Silvestri, Chiara Della Bella, Alessia Grassi, Marisa Benagiano, Fabio Cianchi, Danilo Squatrito, Luca Cantarini, Lorenzo Emmi, Carlo Selmi, Domenico Prisco, Mario Milco D'Elios
BACKGROUND: Gastrointestinal involvement is one of the most serious in Behçet disease, potentially leading to severe complications. Aim of this study was to investigate at mucosal level the T-cell responses in Behçet patients with early intestinal involvement. METHODS: We isolated T cells from intestinal mucosa of 8 patients with intestinal symptoms started within 6 months. T lymphocytes were cloned and analyzed for surface phenotype and cytokines production. RESULTS: We obtained 382 T-cell clones: 324 were CD4+ and 58 were CD8+...
December 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27927968/%C3%AE-%C3%AE-t-cells-coexpressing-gut-homing-%C3%AE-4%C3%AE-7-and-%C3%AE-e-integrins-define-a-novel-subset-promoting-intestinal-inflammation
#9
Jeong-Su Do, Sohee Kim, Karen Keslar, Eunjung Jang, Emina Huang, Robert L Fairchild, Theresa T Pizarro, Booki Min
γδ T lymphocytes, dominant T cell subsets in the intestine, mediate both regulatory and pathogenic roles, yet the mechanisms underlying such opposing effects remain unclear. In this study, we identified a unique γδ T cell subset that coexpresses high levels of gut-homing integrins, CD103 and α4β7. They were exclusively found in the mesenteric lymph node after T cell-mediated colitis induction, and their appearance preceded the inflammation. Adoptive transfer of the CD103(+)α4β7(high) subsets enhanced Th1/Th17 T cell generation and accumulation in the intestine, and the disease severity...
December 7, 2016: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/27927966/tolerogenic-dendritic-cells-from-poorly-compensated-type-1-diabetes-patients-have-decreased-ability-to-induce-stable-antigen-specific-t-cell-hyporesponsiveness-and-generation-of-suppressive-regulatory-t-cells
#10
Klára Dáňová, Anna Grohová, Pavla Strnadová, David P Funda, Zdeněk Šumník, Jan Lebl, Ondřej Cinek, Štěpánka Průhová, Stanislava Koloušková, Barbora Obermannová, Lenka Petruželková, Anna Šedivá, Petra Fundová, Karsten Buschard, Radek Špíšek, Lenka Palová-Jelínková
Tolerogenic dendritic cells (tolDCs) may offer an interesting intervention strategy to re-establish Ag-specific tolerance in autoimmune diseases, including type 1 diabetes (T1D). T1D results from selective destruction of insulin-producing β cells leading to hyperglycemia that, in turn, specifically affects a patient's immune system. In this study, we prepared monocyte-derived tolDCs modulated by dexamethasone and vitamin D2 from 31 T1D patients with optimal glycemic control and 60 T1D patients with suboptimal glycemic control and assessed their tolerogenic properties in correlation with metabolic state of patients...
December 7, 2016: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/27927767/t-cells-in-chronic-lymphocytic-leukemia-display-dysregulated-expression-of-immune-checkpoints-and-activation-markers
#11
Marzia Palma, Giusy Gentilcore, Kia Heimersson, Fariba Mozaffari, Barbro Näsman-Glaser, Emma Young, Richard Rosenquist, Lotta Hansson, Anders Österborg, Håkan Mellstedt
Chronic lymphocytic leukemia is characterized by impaired immune functions largely due to profound T cell defects. T cell functions also depend on co-signaling receptors, inhibitory or stimulatory, known as immune checkpoints, including cytotoxic T lymphocyte-associated antigen-4 (CTLA-4) and programmed death-1 (PD-1). Here we analyzed the T cell phenotype focusing on immune checkpoints and activation markers in chronic lymphocytic leukemia patients (n=80) with different clinical characteristics and compared to healthy controls...
December 7, 2016: Haematologica
https://www.readbyqxmd.com/read/27927642/an-expanded-population-of-pathogenic-regulatory-t-cells-in-giant-cell-arteritis-is-abrogated-by-il-6-blockade-therapy
#12
Chie Miyabe, Yoshishige Miyabe, Klemen Strle, Nancy D Kim, John H Stone, Andrew D Luster, Sebastian Unizony
OBJECTIVES: Randomised-controlled trials have recently proven the efficacy of the interleukin (IL)-6 receptor antagonist tocilizumab (TCZ) in giant cell arteritis (GCA). However, the mechanism of action of IL-6 blockade in this disease is unknown. Moreover, the role of regulatory T (Treg) cells in the pathogenesis of GCA remains underexplored. Given the plasticity of Tregs and the importance of IL-6 in their biology, we hypothesised that TCZ might modulate the Treg response in GCA. We therefore characterised the Treg compartment of patients with GCA treated with TCZ...
December 7, 2016: Annals of the Rheumatic Diseases
https://www.readbyqxmd.com/read/27926535/high-salt-diet-stimulates-gut-th17-response-and-exacerbates-tnbs-induced-colitis-in-mice
#13
Yingfeng Wei, Chong Lu, Jianing Chen, Guangying Cui, Lin Wang, Tianming Yu, Yue Yang, Wei Wu, Yulong Ding, Lanjuan Li, Toshimitsu Uede, Zhi Chen, Hongyan Diao
This study focuses on characterizing the effect of a high salt diet (HSD) on intestinal immunity and the risk of inflammatory bowel diseases (IBD). We found that mice on a HSD had an increased frequency of IL-17A producing cells in the intestinal lamina propria (LP) compared to mice on a normal diet (ND). Furthermore, most intestinal IL-17A producing cells were CD4+TCRβ+ cells. A HSD increased the LP T helper 17 (Th17) responses in both the small and large intestines but did not increase the Th17 response of other gut-associated lymphoid organ...
December 1, 2016: Oncotarget
https://www.readbyqxmd.com/read/27926504/the-immunomodulatory-effects-of-tnf-%C3%AE-inhibitors-on-human-th17-cells-via-ror%C3%AE-t-histone-acetylation
#14
Yi-Ching Lin, Yu-Chih Lin, Cheng-Chin Wu, Ming-Yii Huang, Wen-Chan Tsai, Chih-Hsing Hung, Po-Lin Kuo
The presence of interleukin (IL)-17-related cytokines correlates with rheumatoid arthritis (RA) pathogenesis. Epigenetic modifications, including histone acetylation, regulate gene expression in RA pathogenesis. Tumour necrosis factor-alpha (TNF-α) inhibitors such as etanercept and adalimumab, represent a breakthrough in RA treatment. We aimed to investigate the effects of etanercept and adalimumab on human Th17-polarized cells and the possible intracellular regulators of these effects, including the Th17-specific transcription factors signal transducer, activator of transcription 3 (STAT3), retinoid-related orphan receptor γ-T (RORγt) and epigenetic modification...
December 3, 2016: Oncotarget
https://www.readbyqxmd.com/read/27922688/berberine-exerts-an-anti-inflammatory-role-in-ocular-behcet-s-disease
#15
Yan Yang, Qin Wang, Manyun Xie, Ping Liu, Xin Qi, Xiao Liu, Zhuo Li
Behcet's disease is a multi‑system inflammatory disorder, and ocular Behcet's disease (OBD) is one of the most common causes of uveitis in China. A number of studies have indicated that Th17 cells, a subset of interleukin-17 (IL-17)-producing CD4+ T‑helper cells, serve important roles in the pathogenesis of OBD. Berberine (BBR) is an isoquinoline derivative alkaloid isolated from Chinese herbs, and has been used traditionally for the treatment of gastrointestinal disorders. The aim of the present study was to investigate the effect of BBR on Th17 cell proliferation and cytokine secretion, and the expression and activation of the signal transducer and activator of transcription 3 (STAT3) transcription factor in OBD in vitro...
December 5, 2016: Molecular Medicine Reports
https://www.readbyqxmd.com/read/27921415/the-roles-of-t-helper-1-t-helper-17-and-regulatory-t-cells-in-the-pathogenesis-of-sarcoidosis
#16
Esmaeil Mortaz, Fatemeh Rezayat, Davar Amani, Arda Kiani, Johan Garssen, Ian M Adcock, Aliakbar Velayati
Sarcoidosis is a systemic granulomatous disorder of unidentified etiology, with a heterogeneous clinical presentation. It is characterized by a reduced delayed-type hypersensitivity to tuberculin and common antigens. The balance between Th1, Th17 and Regulatory T(Treg) cells controls T-cell proliferation and activation.The Th17/Treg ratio in the peripheral blood and bronchoalveolar lavage fluidis increased in patients with active sarcoidosis. Amplified IL-17A expression in granulomas and the presence of IL-17A+, IL-17A+IL-4+ and IL-17A+IFN-γ+ memory T helper cells in the circulation and BAL indicate Th17 cell involvement in granuloma induction and/or maintenance in sarcoidosis...
August 2016: Iranian Journal of Allergy, Asthma, and Immunology
https://www.readbyqxmd.com/read/27921406/house-dust-mites-confer-a-distinct-immunological-feature-among-dermatitis
#17
Safa Baris, Ahmet Ozen, Tuba Akdeniz, Elif Karakoc-Aydiner, Ovgu Aydin, Hulya Ercan, Ismail Ogulur, Yildiz Camcioglu, Reha Cengizlier, Cuyan Demirkesen, Deniz Yucelten, Gulderen Demirel, Isil B Barlan
Atopic dermatitis (AD) is a heterogeneous disease with regard to clinical phenotype and natural history. We investigated T cell subtypes and cytokine responses in peripheral blood and skin lesions of AD patients with various sensitivities. Immunological studies were performed in 27 subjects: 9 house dust mite (HDM)-sensitized; 6 subjects with sensitizations other than HDM; 7 non-allergic AD patients and 5 healthy controls. Among those, skin biopsy samples of 13 subjects were evaluated for immunohistochemical analyses, as well...
August 2016: Iranian Journal of Allergy, Asthma, and Immunology
https://www.readbyqxmd.com/read/27918476/antenatal-dexamethasone-exposure-in-preterm-infants-is-associated-with-allergic-diseases-and-the-mental-development-index-in-children
#18
Wan-Ning Tseng, Chih-Cheng Chen, Hong-Ren Yu, Li-Tung Huang, Ho-Chang Kuo
Background: Antenatal steroid administration may benefit fetal lung maturity in preterm infants. Although some studies have shown that this treatment may increase asthma in childhood, the correlation between antenatal dexamethasone exposure and allergic diseases remains unclear. The purpose of this study is to investigate the association between antenatal dexamethasone and T cell expression in childhood allergic diseases. Methods: We recruited a cohort of preterm infants born at Kaohsiung Chang Gung Memorial Hospital between 2007 and 2010 with a gestational age of less than 35 weeks and body weight at birth of less than 1500 g...
December 3, 2016: International Journal of Environmental Research and Public Health
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
#19
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/27916974/autoimmune-disease-egress-of-intestinal-th17-cells-in-autoimmune-renal-disease
#20
Susan J Allison
No abstract text is available yet for this article.
December 5, 2016: Nature Reviews. Nephrology
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