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rheumatoid arthritis, regulatory t cell

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https://www.readbyqxmd.com/read/28714991/resolution-of-inflammation-by-interleukin-9-producing-type-2-innate-lymphoid-cells
#1
Simon Rauber, Markus Luber, Stefanie Weber, Lisa Maul, Alina Soare, Thomas Wohlfahrt, Neng-Yu Lin, Katharina Dietel, Aline Bozec, Martin Herrmann, Mark H Kaplan, Benno Weigmann, Mario M Zaiss, Ursula Fearon, Douglas J Veale, Juan D Cañete, Oliver Distler, Felice Rivellese, Costantino Pitzalis, Markus F Neurath, Andrew N J McKenzie, Stefan Wirtz, Georg Schett, Jörg H W Distler, Andreas Ramming
Inflammatory diseases such as arthritis are chronic conditions that fail to resolve spontaneously. While the cytokine and cellular pathways triggering arthritis are well defined, those responsible for the resolution of inflammation are incompletely characterized. Here we identified interleukin (IL)-9-producing type 2 innate lymphoid cells (ILC2s) as the mediators of a molecular and cellular pathway that orchestrates the resolution of chronic inflammation. In mice, the absence of IL-9 impaired ILC2 proliferation and activation of regulatory T (Treg) cells, and resulted in chronic arthritis with excessive cartilage destruction and bone loss...
July 17, 2017: Nature Medicine
https://www.readbyqxmd.com/read/28713386/impairment-of-granzyme-b-producing-regulatory-b-cells-correlates-with-exacerbated-rheumatoid-arthritis
#2
Liling Xu, Xu Liu, Hongjiang Liu, Lei Zhu, Huaqun Zhu, Jian Zhang, Limin Ren, Pingzhang Wang, Fanlei Hu, Yin Su
Hyperactivated B cells have been demonstrated the contribution to the development of rheumatoid arthritis (RA). While the recognition of the negative regulatory function of B cells further promoted our understanding of their pathogenic role in RA. Recently, a new population of granzyme B (GrB)-producing B cells was identified, which was proved to be involved in cancer and infectious diseases. However, their characteristics and roles in RA remain to be elucidated. In the present study, we aim to further characterize whether B cells could produce GrB and reveal their potential role in the pathogenesis of RA...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28704638/regulator-of-calcineurin-3-ameliorates-autoimmune-arthritis-by-suppressing-th17-cell-differentiation
#3
Jin-Sil Park, Jeong-Hee Jeong, Jae-Kyeong Byun, Mi-Ae Lim, Eun-Kyung Kim, Sung-Min Kim, Si-Young Choi, Sung-Hwan Park, Jun-Ki Min, Mi-La Cho
Regulator of calcineurin 3 (RCAN3), an endogenous regulator of the calcineurin-nuclear factor of activated T cells (NFAT) signaling pathway, inhibits the phosphatase activity of calcineurin, the nuclear translocation of NFAT, and the NFAT downstream pathway. To investigate the effects of RCAN3 on T-cell regulatory function and the development and progression of inflammatory arthritis, we studied the effects of RCAN3 transfection on regulation of Th17 cell differentiation in a murine T-lymphoma cell line and primary splenic CD4(+) T cells...
July 10, 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/28673326/therapeutic-effect-of-a-novel-histone-deacetylase-6-inhibitor-ckd-l-on-collagen-induced-arthritis-in-vivo-and-regulatory-t-cells-in-rheumatoid-arthritis-in-vitro
#4
Bo Ram Oh, Dong-Hyeon Suh, Daekwon Bae, Nina Ha, Young Il Choi, Hyun Jung Yoo, Jin Kyun Park, Eun Young Lee, Eun Bong Lee, Yeong Wook Song
BACKGROUND: Histone deacetylase (HDAC) inhibitor has recently been reported to have a therapeutic effect as an anti-inflammatory agent in collagen-induced arthritis (CIA). We investigated the therapeutic effect of a new selective HDAC6 inhibitor, CKD-L, compared to ITF 2357 or Tubastatin A on CIA and regulatory T (Treg) cells in patients with rheumatoid arthritis (RA). METHODS: CIA was induced by bovine type II collagen (CII) in DBA/1 J mice. Mice were treated with HDAC inhibitor for 18 days...
July 3, 2017: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/28664612/autoimmune-arthritis-induces-paired-immunoglobulin-like-receptor-b-expression-on-cd4-t-cells-from-skg-mice
#5
Kathrin Rothe, Nora Raulien, Gabriele Köhler, Matthias Pierer, Dagmar Quandt, Ulf Wagner
The chronic, destructive autoimmune arthritis in SKG mice, which closely resembles human rheumatoid arthritis, is the result of self-reactive T cells escaping thymic deletion. Since the inhibitory receptor LIR-1 is up-regulated on auto-reactive T cells in human rheumatoid arthritis, the role of its murine ortholog PIR-B was investigated. Peripheral CD4(+) T cells from SKG mice were found to frequently express PIR-B, and this population produces more frequently IL-17 upon in vitro stimulation compared to PIR-B(-) cells...
June 30, 2017: European Journal of Immunology
https://www.readbyqxmd.com/read/28652101/salt-inflammatory-joint-disease-and-autoimmunity
#6
Johanna Sigaux, Luca Semerano, Guillaume Favre, Natacha Bessis, Marie-Christophe Boissier
Salt is a vital nutrient. Excess salt intake, however, has recently been blamed for triggering and/or worsening certain autoimmune diseases. In vitro, the cells involved in innate and adaptive immune responses exhibit an inflammatory profile when placed in hypertonic saline. More specifically, macrophages release increased amounts of proinflammatory cytokines, produce reactive oxygen species, and become capable of activating the inflammasome. T helper cells, via activation of serum and glucocorticoid-regulated kinase 1 (SGK1), overexpress IL-17A and IL-23R and differentiate into Th17 cells; whereas regulatory T cells lose the inhibitory capabilities needed to preserve self-tolerance...
June 23, 2017: Joint, Bone, Spine: Revue du Rhumatisme
https://www.readbyqxmd.com/read/28642760/interleukin-6-in-allogeneic-stem-cell-transplantation-its-possible-importance-for-immunoregulation-and-as-a-therapeutic-target
#7
REVIEW
Tor Henrik Anderson Tvedt, Elisabeth Ersvaer, Anders Aune Tveita, Øystein Bruserud
Allogeneic stem cell transplantation is associated with a high risk of treatment-related mortality mainly caused by infections and graft-versus-host disease (GVHD). GVHD is characterized by severe immune dysregulation and impaired regeneration of different tissues, i.e., epithelial barriers and the liver. The balance between pro- and anti-inflammatory cytokine influences the risk of GVHD. Interleukin-6 (IL-6) is a cytokine that previously has been associated with pro-inflammatory effects. However, more recent evidence from various autoimmune diseases (e...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28615031/leucine-rich-alpha-2-glycoprotein-promotes-th17-differentiation-and-collagen-induced-arthritis-in-mice-through-enhancement-of-tgf-%C3%AE-smad2-signaling-in-na%C3%A3-ve-helper-t-cells
#8
Hayato Urushima, Minoru Fujimoto, Takashi Mishima, Tomoharu Ohkawara, Hiromi Honda, Hyun Lee, Hirohisa Kawahata, Satoshi Serada, Tetsuji Naka
BACKGROUND: Leucine-rich alpha 2 glycoprotein (LRG) has been identified as a serum protein elevated in patients with active rheumatoid arthritis (RA). Although the function of LRG is ill-defined, LRG binds with transforming growth factor (TGF)-β and enhances Smad2 phosphorylation. Considering that the imbalance between T helper 17 (Th17) cells and regulatory T cells (Treg) plays important roles in the pathogenesis of RA, LRG may affect arthritic pathology by enhancing the TGF-β-Smad2 pathway that is pivotal for both Treg and Th17 differentiation...
June 14, 2017: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/28583308/an-epitope-specific-derg-pg70-leaps-vaccine-modulates-t-cell-responses-and-suppresses-arthritis-progression-in-two-related-murine-models-of-rheumatoid-arthritis
#9
Katalin Mikecz, Tibor T Glant, Adrienn Markovics, Kenneth S Rosenthal, Julia Kurko, Roy E Carambula, Steve Cress, Harold L Steiner, Daniel H Zimmerman
Rheumatoid arthritis (RA) is an autoimmune joint disease maintained by aberrant immune responses involving CD4+ T helper (Th)1 and Th17 cells. In this study, we tested the therapeutic efficacy of Ligand Epitope Antigen Presentation System (LEAPS™) vaccines in two Th1 cell-driven mouse models of RA, cartilage proteoglycan (PG)-induced arthritis (PGIA) and PG G1-domain-induced arthritis (GIA). The immunodominant PG peptide PG70 was attached to a DerG or J immune cell binding peptide, and the DerG-PG70 and J-PG70 LEAPS vaccines were administered to the mice after the onset of PGIA or GIA symptoms...
July 13, 2017: Vaccine
https://www.readbyqxmd.com/read/28582403/vitamin-d-and-immunomodulation-in-early-rheumatoid-arthritis-a-randomized-double-blind-placebo-controlled-study
#10
Ilaria Buondonno, Guido Rovera, Francesca Sassi, Micol Maria Rigoni, Claudia Lomater, Simone Parisi, Raffaele Pellerito, Giovanni Carlo Isaia, Patrizia D'Amelio
The aim of this study was to evaluate differences in T helper cell sub-types and osteoclast (OCs) precursors in peripheral blood between patients affected by early rheumatoid arthritis (eRA) and healthy controls. The effect of administration of cholecalcipherol on clinical and laboratory parameters was subsequently evaluated, by a parallel, randomized double blind, placebo controlled trial. Thirty nine eRA patients and 31 age-matched controls were enrolled and compared for levels of 25OH vitamin D, T helper cell sub-types, OCs precursors including both classical and non-classical and pro-inflammatory cytokines at baseline...
2017: PloS One
https://www.readbyqxmd.com/read/28565837/artesunate-influences-th17-treg-lymphocyte-balance-by-modulating-treg-apoptosis-and-th17-proliferation-in-a-murine-model-of-rheumatoid-arthritis
#11
Jia Liu, Xuezhi Hong, Dong Lin, Xiaohong Luo, Mengya Zhu, Hanyou Mo
CD4(+) regulatory T (Treg) cells and T-helper 17 (Th17) cells have been shown to have important roles in rheumatoid arthritis (RA). In our previous study, it was demonstrated that artesunate was able to alter the Treg/Th17 ratio in patients with RA; however, the underlying mechanisms remain unclear. The present study established a male Sprague Dawley (SD) rat model of type II collagen-induced arthritis (CIA). SD rats were divided into normal control, CIA model and artesunate-treated (5, 10 or 20 mg/kg/day) groups...
May 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28560007/use-of-immune-modulation-by-human-adipose-derived-mesenchymal-stem-cells-to-treat-experimental-arthritis-in-mice
#12
Li Zhang, Xiao-Yan Wang, Peng-Jun Zhou, Zhe He, Hai-Zhao Yan, Dan-Dan Xu, Ying Wang, Wu-Yu Fu, Bi-Bo Ruan, Sheng Wang, Hai-Xuan Chen, Qiu-Ying Liu, Yu-Xia Zhang, Zhong Liu, Yi-Fei Wang
Rheumatoid arthritis is a chronic and systemic autoimmune disease characterized by inflammatory cell infiltration and joint erosion. Human adipose-derived mesenchymal stem cells (hASCs) have shown the capacity of suppressing effector T cell activation and inflammatory cytokine expression. We investigated whether hASCs play a therapeutic role in collagen-induced arthritis (CIA) by administering a single dose of hASCs in mice with established CIA. In vivo, a beneficial effect was observed following hASC infusion as shown by a marked decrease in the severity of arthritis...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/28555437/autoimmunity-in-2016
#13
REVIEW
Carlo Selmi
The number of peer-reviewed articles published during the 2016 solar year and retrieved using the "autoimmunity" key word remained stable while gaining a minimal edge among the immunology articles. Nonetheless, the quality of the publications has been rising significantly and, importantly, acquisitions have become available through scientific journals dedicated to immunology or autoimmunity. Major discoveries have been made in the fields of systemic lupus erythematosus, rheumatoid arthritis, autoimmunity of the central nervous system, vasculitis, and seronegative spondyloarthrithritides...
August 2017: Clinical Reviews in Allergy & Immunology
https://www.readbyqxmd.com/read/28554321/phosphodiesterase-4-inhibitors-in-immune-mediated-diseases-mode-of-action-clinical-applications-current-and-future-perspectives
#14
Lazaros I Sakkas, Athanasios Mavropoulos, Dimitrios P Bogdanos
Phosphodiesterase (PDE) 4 is a superfamily of enzymes that catalyze the hydrolysis of cyclic adenosine 3',5'-monophosphate (cAMP), an intracellular second messenger and regulator of a wide array of genes and proteins. Increased levels of intracellular cAMP lead to activation of genes but also to inhibition of nuclear factor-kappa B, involved in pro-inflammatory responses. By increasing cAMP levels, PDE4 inhibitors, such as apremilast, reduced production of pro-inflammatory TNFα, IFNγ, and IL-17 and increased production of anti-inflammatory IL-10 in lipopolysaccharide-stimulated peripheral blood mononuclear cells, and in patients with psoriatic arthritis (PsA)...
May 29, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28526072/differences-in-serum-and-synovial-cd4-t-cells-and-cytokine-profiles-to-stratify-patients-with-inflammatory-osteoarthritis-and-rheumatoid-arthritis
#15
Alessandra Penatti, Federica Facciotti, Roberta De Matteis, Paola Larghi, Moira Paroni, Antonella Murgo, Orazio De Lucia, Massimiliano Pagani, Luca Pierannunzii, Marcello Truzzi, Andreea Ioan-Facsinay, Sergio Abrignani, Jens Geginat, Pier Luigi Meroni
BACKGROUND: The aim was to investigate CD4(+)T-cell subsets, immune cells and their cytokine profiles in blood and synovial compartments in rheumatoid arthritis (RA) and inflammatory osteoarthritis (OA) to define specific immune signatures. METHODS: Peripheral blood, synovial fluid (SF) and synovial membranes (SM) of RA and OA patients were analyzed. CD4(+)T-cell subset frequencies were determined by flow cytometry, and cytokine concentrations in serum and SF were measured by ELISA...
May 19, 2017: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/28522406/therapeutic-effect-of-cryptotanshinone-on-experimental-rheumatoid-arthritis-through-downregulating-p300-mediated-stat3-acetylation
#16
Ying Wang, Chun Zhou, Hui Gao, Cuixian Li, Dong Li, Peiqing Liu, Min Huang, Xiaoyan Shen, Liang Liu
BACKGROUND AND PURPOSE: The balance between T helper 17 (Th17) cells and regulatory T (Treg) cells, plays a critical role in rheumatoid arthritis (RA). The differentiation of Th17 cells requires the activation of STAT3, which determines the balance of Th17/Treg. Here, we investigated the therapeutic effect of Cryptotanshinone (CTS) on collagen induced mouse arthritis and explored the underlying mechanisms. EXPERIMENTAL APPROACH: Arthritis was induced in DBA/1 mice with bovine collagen type II and complete Freund's adjuvant...
May 16, 2017: Biochemical Pharmacology
https://www.readbyqxmd.com/read/28512992/association-of-cd8-t-cells-with-bone-erosion-in-patients-with-rheumatoid-arthritis
#17
Young Bin Joo, Youngho Park, Kwangwoo Kim, So-Young Bang, Sang-Cheol Bae, Hye-Soon Lee
AIM: Bone erosion is a major problem worsening quality of rheumatoid arthritis (RA) patients' lives. However, causal factors responsible for bone erosion in RA have remained unclear. We aimed to examine genetic variants conferring bone erosion in RA using a Korean genome-wide association study (GWAS) and to search for possible biological mechanisms underlying the development of bone erosion. METHOD: We obtained genome-wide single nucleotide polymorphism (SNP) data for 711 Korean RA patients using Illumina HapMap 550v3/660W arrays...
May 16, 2017: International Journal of Rheumatic Diseases
https://www.readbyqxmd.com/read/28511719/interleukin-10-producing-lag3-regulatory-t-cells-are-associated-with-disease-activity-and-abatacept-treatment-in-rheumatoid-arthritis
#18
Shinichiro Nakachi, Shuji Sumitomo, Yumi Tsuchida, Haruka Tsuchiya, Masanori Kono, Rika Kato, Keiichi Sakurai, Norio Hanata, Yasuo Nagafuchi, Shoko Tateishi, Hiroko Kanda, Tomohisa Okamura, Kazuhiko Yamamoto, Keishi Fujio
BACKGROUND: Regulatory T cells (Tregs) play a role in the suppression of inflammation in autoimmune diseases, and lymphocyte activation gene 3 (LAG3) was reported as a marker of interleukin (IL)-10-producing Tregs. We aimed to clarify the function of human IL-10-producing CD4(+)CD25(-)LAG3(+) T cells (LAG3(+) Tregs) and their association with rheumatoid arthritis (RA). METHODS: LAG3(+) Tregs of human peripheral blood mononuclear cells (PBMCs) were cultured with B cells and follicular helper T cells to examine antibody suppression effects...
May 16, 2017: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/28502136/cd4-cd25-cd127low-regulatory-t-cells-as-indicator-of-rheumatoid-arthritis-disease-activity
#19
Sahar S Khattab, Amany M El-Saied, Rehab A Mohammed, Eman E Mohamed
Rheumatoid arthritis (RA) is an autoimmune disease characterized by disturbed immune regulation, inducing a progressive cartilage and bone destruction. Despite enrichment of T regulatory cell (T-regs) in synovial fluid, conflicting results are reported concerning T-regs in peripheral blood (PB) of RA patients. To determine possible correlation between the frequency of PB CD4+ CD25+CD127low (T-regs) with RA disease activity. Forty females with RA, classified according to the Disease Activity Score 28 (DAS-28), as highly active, mild-moderate or low disease activity; and 20 age and sex matched healthy controls, were enrolled to study CD4+ CD25+ CD127low T- regs in PB by flow cytometry...
June 2016: Egyptian Journal of Immunology
https://www.readbyqxmd.com/read/28497863/ctla-4-expressed-by-foxp3-treg-cells-prevents-inflammatory-tissue-attack-and-not-t-cell-priming-in-arthritis
#20
Katrin Klocke, Rikard Holmdahl, Kajsa Wing
Cytotoxic T-lymphocyte antigen 4 (CTLA-4)-mediated regulation of already tolerized autoreactive T cells is critical for understanding autoimmune responses. While defects in CTLA-4 contribute to abnormal FOXP3(+) regulatory T cell (Treg) function in rheumatoid arthritis (RA) its role in autoreactive T cells remains elusive. We studied immunity towards the dominant collagen type-II (CII) T cell epitope in collagen-induced arthritis (CIA) both in the heterologous setting and in the autologous setting where CII is mutated at position E266D in mouse cartilage...
May 12, 2017: Immunology
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