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https://www.readbyqxmd.com/read/28108610/circulating-cxcr5-pd-1-icos-follicular-t-helper-cells-are-increased-close-to-the-diagnosis-of-type-1-diabetes-in-children-with-multiple-autoantibodies
#1
Tyyne Viisanen, Emmi-Leena Ihantola, Kirsti Näntö-Salonen, Heikki Hyöty, Noora Nurminen, Jenni Selvenius, Auni Juutilainen, Leena Moilanen, Jussi Pihlajamäki, Riitta Veijola, Jorma Toppari, Mikael Knip, Jorma Ilonen, Tuure Kinnunen
Although type 1 diabetes (T1D) is primarily perceived as a T cell-driven autoimmune disease, islet autoantibodies are the best currently available biomarker for autoimmunity and disease risk. These antibodies are produced by autoreactive B cells, the activation of which is largely dependent on the function of CD4(+)CXCR5(+) follicular T helper cells (Tfh). In this study, we have comprehensively characterized the Tfh- as well as B-cell compartments in a large cohort of children with newly diagnosed T1D or at different stages of preclinical T1D...
February 2017: Diabetes
https://www.readbyqxmd.com/read/28017425/vaccination-of-rhesus-macaques-with-the-live-attenuated-hsv-1-vaccine-vc2-stimulates-the-proliferation-of-mucosal-t-cells-and-germinal-center-responses-resulting-in-sustained-production-of-highly-neutralizing-antibodies
#2
Brent A Stanfield, Bapi Pahar, Vladimir N Chouljenko, Ronald Veazey, Konstantin G Kousoulas
We have shown that the live-attenuated HSV-1 VC2 vaccine strain with mutations in glycoprotein K (gK) and the membrane protein UL20 is unable to establish latency in vaccinated animals and produces a robust immune response capable of completely protecting mice against lethal vaginal HSV-1 or HSV-2 infections. To better understand the immune response generated by vaccination with VC2, we tested its ability to elicit immune responses in rhesus macaques. Vaccinated animals showed no signs of disease and developed increasing HSV-1 and HSV-2 reactive IgG1 after two booster vaccinations, while IgG subtypes IgG2 and IgG3 remained at low to undetectable levels...
December 22, 2016: Vaccine
https://www.readbyqxmd.com/read/28004828/analysis-of-cxcr5-th17-cells-in-relation-to-disease-activity-and-tnf-inhibitor-therapy-in-rheumatoid-arthritis
#3
Deepika Singh, Matthew Henkel, Bernadette Sendon, June Feng, Anthony Fabio, Diana Metes, Larry W Moreland, Mandy J McGeachy
Th17 and TfH cells are thought to promote tissue inflammation and autoantibody production, respectively, in autoimmune diseases including rheumatoid arthritis (RA). TfH cells that co-express Th17 markers (CXCR5(+)Th17) encompass both of these pathogenic functions, and are increased in some human autoimmune settings including juvenile dermatomyositis. We investigated CXCR5(+)Th17 cells in RA subjects with stable or active disease and before and after TNF inhibitor therapy. CXCR5(+)Th17 cell frequency was increased in RA compared to healthy controls, but other helper T cell subsets were not different...
December 22, 2016: Scientific Reports
https://www.readbyqxmd.com/read/28002487/long-term-transcriptomic-effects-of-prebiotics-and-synbiotics-delivered-in-ovo-in-broiler-chickens
#4
Anna Slawinska, Arkadiusz Plowiec, Maria Siwek, Marcin Jaroszewski, Marek Bednarczyk
In ovo delivery of prebiotics and synbiotics in chickens allows for the development of intestinal microflora prior to hatching, which boosts their robustness. The goal of this study was to determine the transcriptomic profile of the spleen (S), cecal tonsils (CT), and large intestine (LI) of adult chickens injected with prebiotics and synbiotics in ovo. On day 12 of embryo development, incubating eggs were injected with prebiotics: inulin alone (P1) or in combination with Lactococcus lactis subsp. lactis IBB2955 (S1), galactooligosaccharides (GOS) alone (P2) or in combination with Lactococcus lactis subsp...
2016: PloS One
https://www.readbyqxmd.com/read/27987497/-significance-of-different-t-follicular-helper-subsets-in-rheumatoid-arthritis
#5
X M Chen, J Li, X Y Zhang, Y B Jin, D Yu, X L Sun, L J Wu, J He, Z G Li
OBJECTIVE: To detect the expressions of T follicular helper (Tfh) subsets and T follicular helper effect memory (Tfhem) cells in circulation of patients with rheumatoid arthritis (RA), as well as to examine their roles in providing biomarkers for active RA. METHODS: This study enrolled 41 patients with RA, who were navely-treated or had no application of hormone and disease-modifying anti-rheumatic drugs in recent 3 months, as well as 32 healthy controls. The percentages of Tfhem (CD4(+)CXCR5(+)CCR7(low)PD1(high)) cells, Tfh (CD3(+)CD4(+)CXCR5(+)CD45RA(-)) subsets, Tfh1 (CXCR3(+)CCR6(-)Tfh),Tfh2 (CXCR3(-)CCR6(-)Tfh),and Tfh17 (CXCR3(-)CCR6(+)Tfh), were determined by flow cytometry of peripheral blood from the patients with RA and health controls...
December 18, 2016: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/27987496/-detection-of-peripheral-follicular-helper-t-cells-in-rheumatoid-arthritis
#6
L M An, J Li, L L Ji, G T Li, Z L Zhang
OBJECTIVE: To detect cell frequency and surface markers of peripheral CD4(+)CXCR5+ follicular helper T (Tfh) cells and analyze the correlation between CD4(+)CXCR5(+)Tfh cells and rheumatoid arthritis (RA) disease activity. METHODS: Forty RA patients meeting the American College of Rheumatology classification criteria for RA and twenty healthy controls (HC) were included. The peripheral blood mononuclear cells and sera were collected. The expressions of CD4+CXCR5(+)Tfh cells (CXCR5, C-X-C chemokine receptor type 5) and inducible T cell costimulator (ICOS), programmed death 1 positive (PD-1), interleukin-21 receptor (IL-21R) and CD40 ligand (CD40L) positive on CD4(+)CXCR5(+)Tfh cells were analyzed by flow cytometry...
December 18, 2016: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/27957330/evidence-of-perturbed-germinal-center-dynamics-but-preserved-antibody-diversity-in-end-stage-renal-disease
#7
Kristian Assing, Christian Nielsen, Marianne Jakobsen, Alexandra Scholze, Mads Nybo, Grete Soerensen, Sussie Mortensen, Knud Vejen, Torben Barington, Claus Bistrup
INTRODUCTION: End-stage renal disease (ESRD) is associated with increased infectious susceptibility and with reduced vaccine responses consistent with compromised humoral immunity. Whether the compromised humoral immunity is due to reduced antibody diversity (reduced somatic hypermutation [SHM]) or altered germinal center (GC) dynamics is not known. The GC-derived chemokine CXCL13 as well as peripheral T follicular helper cells (pTFH) reflect GC dynamics, but have, similar to SHM, never been characterized in relation to ESRD...
June 2016: Immunity, Inflammation and Disease
https://www.readbyqxmd.com/read/27941331/interleukin-17ra-promotes-humoral-responses-and-glomerular-injury-in-experimental-rapidly-progressive-glomerulonephritis
#8
Joanna R Ghali, Kim M O'Sullivan, Peter J Eggenhuizen, Stephen R Holdsworth, A Richard Kitching
BACKGROUND/AIMS: Interleukin (IL)-17A and IL-17F are proinflammatory cytokines, which signal through a receptor complex consisting of IL-17RA and IL-17RC subunits. We sought to define the role of IL-17RA expression by leukocytes and stromal cells in nephritogenic immunity and injury in experimental glomerulonephritis. METHODS: Glomerulonephritis was induced in wild-type and IL-17RA-deficient (IL-17RA-/-) mice by sheep anti-mouse glomerular basement membrane globulin...
December 10, 2016: Nephron
https://www.readbyqxmd.com/read/27933060/regulators-of-tfh-cell-differentiation
#9
REVIEW
Gajendra M Jogdand, Suchitra Mohanty, Satish Devadas
The follicular helper T (Tfh) cells help is critical for activation of B cells, antibody class switching, and germinal center (GC) formation. The Tfh cells are characterized by the expression of CXC chemokine receptor 5 (CXCR5), ICOS, programed death 1 (PD-1), B cell lymphoma 6 (BCL-6), and IL-21. They are involved in clearing infections and are adversely linked with autoimmune diseases and also have a role in viral replication as well as clearance. On the one hand, Tfh cells are generated from naive CD4(+) T cells with sequential steps involving cytokine signaling (IL-21, IL-6, IL-12, activin A), migration, and positioning in the GC by CXCR5, surface receptors (ICOS/ICOSL, signaling lymphocyte activation molecule-associated protein/signaling lymphocyte activation molecule) as well as transcription factor (BCL-6, c-Maf, and signal transducer and activator of transcription 3) signaling and repressor miR155...
2016: Frontiers in Immunology
https://www.readbyqxmd.com/read/27931292/circulating-follicular-t-helper-cell-subset-distribution-in-patients-with-asthma
#10
Fang Gong, Chunyan Qian, HuaYan Zhu, Jie Zhu, Yuhong Pan, QiaoJing Dong, DongLin Jiang
BACKGROUND: The pathogenesis of allergic asthma is primarily characterized by abnormality in the immunoglobulin E (IgE) pathway, suggesting a possible role for follicular T-helper cells (Tfh) in the genesis of excessive IgE accumulation. The blood chemokine (C-X-C motif) receptor 5 (CXCR5)+CD4+ T cells, known as circulating Tfh, share common functional characteristics with Tfh cells from germinal centers. There are three subsets of circulating Tfh cells: Tfh1 (CXCR3+CC chemokine receptor [CCR] 6), Tfh2 (CXCR3CCR6) and Tfh17 (CXCR3CCR6+)...
November 2016: Allergy and Asthma Proceedings:
https://www.readbyqxmd.com/read/27909439/the-a-allele-of-the-single-nucleotide-polymorphism-rs630923-creates-a-binding-site-for-mef2c-resulting-in-reduced-cxcr5-promoter-activity-in-b-cell-lymphoblastic-cell-lines
#11
Nikita A Mitkin, Alisa M Muratova, Anton M Schwartz, Dmitry V Kuprash
Chemokine receptor CXCR5 is highly expressed in B-cells and under normal conditions is involved in their migration to specific areas of secondary lymphoid organs. B-cells are known to play an important role in various autoimmune diseases including multiple sclerosis (MS) where areas of demyelinating lesions attract B-cells by overexpressing CXCL13, the CXCR5 ligand. In this study, we aimed to determine the functional significance of single-nucleotide polymorphism rs630923 (A/C), which is located in cxcr5 gene promoter, and its common allele is associated with increased risk of MS...
2016: Frontiers in Immunology
https://www.readbyqxmd.com/read/27888017/circulating-cxcr5-cd4-t-cells-assist-in-the-survival-and-growth-of-primary-diffuse-large-b-cell-lymphoma-cells-through-interleukin-10-pathway
#12
Zhanshan Cha, Guangfang Qian, Yan Zang, Haihui Gu, Yanyan Huang, Lishuang Zhu, Jinqi Li, Yang Liu, Xiaohua Tu, Haihan Song, Baohua Qian
Diffuse large B cell lymphoma (DLBCL) is a common and aggressive cancer caused by the malignant transformation of B cells. Although it has been established that the follicular helper T (Tfh) cells play a central role in B cell development, little information is available on their involvement in DLBCL pathogenesis. We studied the role of the peripheral Tfh equivalent, the CXCR5(+) CD4(+) T cells, in DLBCL. Data showed that compared to CXCR5(-) CD4(+) T cells, CXCR5(+) CD4(+) T cells were significantly more effective at promoting the proliferation as well as inhibiting the apoptosis of primary autologous DLBCL tumor cells...
January 1, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/27873133/altered-expression-of-cxcl13-and-cxcr5-in-intractable-temporal-lobe-epilepsy-patients-and-pilocarpine-induced-epileptic-rats
#13
Ruohan Li, Limin Ma, Hao Huang, Shu Ou, Jinxian Yuan, Tao Xu, Xinyuan Yu, Xi Liu, Juan Yang, Yangmei Chen, Xi Peng
The mechanisms that underlie the pathogenesis of epilepsy are still unclear. Recent studies have indicated that inflammatory processes occurring in the brain are involved in a common and crucial mechanism in epileptogenesis. C-X-C motif chemokine ligand 13 (CXCL13) and its only receptor, C-X-C motif chemokine receptor 5 (CXCR5), are highly expressed in the central nervous system (CNS) and participate in inflammatory responses. The present study aimed to assess the expression of CXCL13 and CXCR5 in the brain tissues of both patients with intractable epilepsy (IE) and a rat model (lithium-pilocarpine) of temporal lobe epilepsy (TLE) to identify possible roles of the CXCL13-CXCR5 signaling pathway in epileptogenesis...
November 21, 2016: Neurochemical Research
https://www.readbyqxmd.com/read/27865860/human-regulatory-b-cells-control-the-tfh-cell-response
#14
Achouak Achour, Quentin Simon, Audrey Mohr, Jean-François Séité, Pierre Youinou, Boutahar Bendaoud, Ibtissem Ghedira, Jacques-Olivier Pers, Christophe Jamin
BACKGROUND: Follicular helper T (TFH) cells support terminal B-cell differentiation. Human regulatory B (Breg) cells modulate cellular responses, but their control of TFH cell-dependent humoral immune responses is unknown. OBJECTIVE: We sought to assess the role of Breg cells on TFH cell development and function. METHODS: Human T cells were polyclonally stimulated in the presence of IL-12 and IL-21 to generate TFH cells. They were cocultured with B cells to induce their terminal differentiation...
November 16, 2016: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/27863842/development-of-t-follicular-helper-cells-and-their-role-in-disease-and-immune-system
#15
REVIEW
Sadegh Eivazi, Salman Bagheri, Mohammad Sadegh Hashemzadeh, Majdedin Ghalavand, Elmira Safaie Qamsari, Ruhollah Dorostkar, Maryam Yasemi
The T follicular helper cells (TFH) are a subset of CD4+ T cells specialized to regulate antibody responses. The production of these cells is associated with the dendritic cells (DCs) and B cells. TFH cells help B cells form germinal centers (GC) differentiate into memory and plasma cells (antibody-secreting cells) as humoral responses. In addition, there is strong evidence that TFH cells play a pivotal role in the development of long-lived humoral immunity. Molecular factors such as transcription factors, surface receptors, cytokine and micro RNAs are involved in the formation of TFH cells...
December 2016: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/27853628/tir-domain-containing-adapter-inducing-interferon-%C3%AE-trif-regulates-cxcr5-t-helper-cells-in-the-intestine
#16
Saravana Kanagavelu, Claudia Flores, Shinichiro Hagiwara, Jose Ruiz, Jinhee Hyun, Ei E Cho, Frank Sun, Laura Romero, David Q Shih, Masayuki Fukata
OBJECTIVE: Establishing an effective humoral immunity is an important host defense mechanism in intestinal mucosa. T follicular helper (Tfh) cells are a spectrum of CXCR5 expressing T helper cells that induce antigen-specific B cell differentiation. Because the differentiation of T helper cells is largely regulated by innate immunity, we addressed whether TRIF signaling regulates Tfh cell differentiation and its ability to trigger humoral immune responses in the intestine. METHOD: CD4(+)CXCR5(+) T cells, B cells, and plasma cells in the Peyer's patches (PPs) of WT and TRIF-deficient (Trif(LPS2)) mice were analyzed by flow cytometry at the baseline, 9 days post primary infection, and 7 days post-secondary infection with Y...
October 2016: Journal of Clinical & Cellular Immunology
https://www.readbyqxmd.com/read/27821867/impaired-t-cell-dependent-humoral-immune-response-associated-with-juvenile-onset-recurrent-respiratory-papillomatosis-progression
#17
Xunyao Wu, Guoliang Wang, Xi Chen, Jie Zhang, Jing Zhao, Jun Wang, Yang Xiao, Jun Tai, Shengcai Wang, Guixiang Wang, Hua Wang, Lina Bai, Jingang Gui, Xin Ni
Whether humoral immunity plays a role in HPV type 6 or 11 virus-mediated Juvenile-onset Recurrent Respiratory Papillomatosis (JORRP) remains unknown. In the present study, serum total IgG level in 44 JORRP patients was significantly decreased compared with that in 40 healthy controls. Moreover, expanded CD3(-)CD19(+) B cells with down-regulation of CD23, CD40, HLA-DR and up-regulation of CD86 expression were found in the peripheral blood of JORRP patients. Flow cytometry analysis of B-cell compartment showed that the frequency of both CD19(+)CD27(hi) plasma cells and CD19(+)CD27(+) memory B cells were decreased in JORRP patients...
November 8, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27819282/characterization-of-t-follicular-helper-cells-in-allogeneic-normal-pregnancy-and-pdl1-blockage-induced-abortion
#18
Weihong Zeng, Zhicui Liu, Siming Zhang, Jiabin Ren, Xiaoling Ma, Chuanmei Qin, Fuju Tian, Yan Zhang, Yi Lin
A deeper understanding of the immunological events during pregnancy will provide novel insights into the pathogenesis of pregnancy complications. The fundamental function of T follicular helper (Tfh) cells is to provide cognate help to B cells. Dysregulations of Tfh-cell function and/or development can result in various immunological diseases. However, the role and characteristics of Tfh cells during pregnancy remain unknown. Herein, an allogeneic-normal-pregnant mouse model was used, and we found that the CD4(+) T cells residing at the uterus and placenta (UP) displayed a Tfh-like phenotype; and the UP-derived CD4(+)CXCR5(hi)PD-1(hi) and CD4(+)CXCR5(hi)ICOS(hi) Tfh cells, which showed a memory/activation phenotype, reached their peak at mid-pregnancy...
November 7, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27818202/the-expression-of-bcl-6-in-circulating-follicular-helper-like-t-cells-positively-correlates-with-the-disease-activity-in-systemic-lupus-erythematosus
#19
Xin Huang, Haijing Wu, Hong Qiu, Huilan Yang, Yaxiong Deng, Ming Zhao, Hairong Luo, Xiang Zhou, Yubin Xie, Vera Chan, Chak-Sing Lau, Qianjin Lu
Increased circulating follicular helper-like T cells (cTfh) are reported in systemic lupus erythematosus (SLE) patients. However, whether B-cell lymphoma 6 (Bcl-6) is expressed in cTfh cells remains to be clarified. In this study, we found that the frequencies of CD4(+)CXCR5(hi)PD-1(hi)cTfh, CD4(+)CXCR5(hi)PD-1(hi)ICOS(hi), and CD4(+)CXCR5(hi)PD-1(hi)Bcl-6(+) populations were significantly increased in SLE patients (n=70) when compared with healthy controls (n=48). Surprisingly, only CD4(+)CXCR5(hi)PD-1(hi)Bcl-6(+) cTfh cells, rather than CD4(+)CXCR5(hi)PD-1(hi) population, were positively correlated with SLEDAI and anti-dsDNA antibodies...
December 2016: Clinical Immunology: the Official Journal of the Clinical Immunology Society
https://www.readbyqxmd.com/read/27805618/eosinophils-are-required-to-suppress-th2-responses-in-peyer-s-patches-during-intestinal-infection-by-nematodes
#20
J Strandmark, S Steinfelder, C Berek, A A Kühl, S Rausch, S Hartmann
Infections with enteric nematodes result in systemic type 2 helper T (Th2) responses, expansion of immunoglobulin (Ig)G1 antibodies, and eosinophilia. Eosinophils have a supportive role in mucosal Th2 induction during airway hyperreactivity. Whether eosinophils affect the local T-cell and antibody response in the gut-associated lymphoid tissue during enteric infections is unknown. We infected eosinophil-deficient ΔdblGATA-1 mice with the Th2-inducing small intestinal nematode Heligmosomoides polygyrus and found that parasite fecundity was decreased in the absence of eosinophils...
November 2, 2016: Mucosal Immunology
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