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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
#1
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
#2
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...
November 23, 2016: 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
#3
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-tfh-response
#4
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 the terminal B-cell differentiation. Human regulatory B (Breg) cells modulate cellular responses but their control of Tfh-dependent humoral immune responses is unknown. OBJECTIVE: To assess the role of Breg cells on Tfh 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 co-cultured 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
#5
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...
November 15, 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
#6
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
#7
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
#8
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
#9
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...
November 3, 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
#10
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
https://www.readbyqxmd.com/read/27798160/water-in-oil-only-adjuvants-selectively-promote-t-follicular-helper-cell-polarization-through-a-type-i-ifn-and-il-6-dependent-pathway
#11
Nicolas Riteau, Andrea J Radtke, Kevin Shenderov, Lara Mittereder, Sandra D Oland, Sara Hieny, Dragana Jankovic, Alan Sher
T follicular helper (Tfh) cells are a subset of CD4(+) T lymphocytes that promote the development of humoral immunity. Although the triggers required for the differentiation of the other major Th subsets are well defined, those responsible for Tfh cell responses are still poorly understood. We determined that mice immunized with peptide or protein Ags emulsified in IFA or related water-in-oil adjuvants develop a highly polarized response in which the majority of the Ag-specific CD4(+) T cells are germinal center-homing CXCR5(+)Bcl6(+) Tfh cells...
November 15, 2016: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/27791035/mirna92a-targets-klf2-and-the-phosphatase-pten-signaling-to-promote-human-t-follicular-helper-precursors-in-t1d-islet-autoimmunity
#12
Isabelle Serr, Rainer W Fürst, Verena B Ott, Martin G Scherm, Alexei Nikolaev, Füsun Gökmen, Stefanie Kälin, Stephanie Zillmer, Melanie Bunk, Benno Weigmann, Nicole Kunschke, Brigitta Loretz, Claus-Michael Lehr, Benedikt Kirchner, Bettina Haase, Michael Pfaffl, Ari Waisman, Richard A Willis, Anette-G Ziegler, Carolin Daniel
Aberrant immune activation mediated by T effector cell populations is pivotal in the onset of autoimmunity in type 1 diabetes (T1D). T follicular helper (TFH) cells are essential in the induction of high-affinity antibodies, and their precursor memory compartment circulates in the blood. The role of TFH precursors in the onset of islet autoimmunity and signaling pathways regulating their differentiation is incompletely understood. Here, we provide direct evidence that during onset of islet autoimmunity, the insulin-specific target T-cell population is enriched with a C-X-C chemokine receptor type 5 (CXCR5)(+)CD4(+) TFH precursor phenotype...
October 25, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27788370/function-of-follicular-helper-t-cell-is-impaired-and-correlates-with-survival-time-in-non-small-cell-lung-cancer
#13
Qin-Yun Ma, Da-Yu Huang, Hui-Jun Zhang, Ji Chen, Wendy Miller, Xiao-Feng Chen
Non-small cell lung cancer (NSCLC) represents one of the most common and aggressive cancers worldwide. The PD-1/PD-L1 interaction plays important roles in cancer immunology, and expression of PD-L1 has been discovered in NSCLC tumor cells. Since follicular helper T (Tfh) cells have characteristic high PD-1 expression, we therefore investigated the inflammatory status of Tfh in NSCLC. CD4(+)CXCR5(+) T cell population was examined to define Tfh cells. Data showed that frequency of Tfh cells in peripheral blood was significantly lower in NSCLC patients than in healthy controls...
October 24, 2016: International Immunopharmacology
https://www.readbyqxmd.com/read/27769508/b-lymphopoiesis-in-fetal-liver-guided-by-chemokines
#14
K Kajikhina, M Tsuneto, F Melchers
Early in embryonic development of mice, from day 12.5 after conception, myeloid-lymphoid bipotent progenitors, expressing receptors both for IL7 and CSF-1, migrate from embryonic blood into developing fetal liver. These progenitors also express multiple chemokine receptors, i.e., CCR7, CXCR3, CXCR4, and CXCR5, all on one cell. Their migration through LYVE-1+ vascular endothelium is guided by CCR7, recognizing the chemokine CCL19, and by CXCR3, recognizing CXCL10/11, chemokines which are both produced by the endothelium...
2016: Advances in Immunology
https://www.readbyqxmd.com/read/27769184/distinct-phenotypic-subpopulations-of-circulating-cd4-cxcr5-follicular-helper-t-cells-in-children-with-active-iga-vasculitis
#15
Deying Liu, Jinxiang Liu, Jinghua Wang, Congcong Liu, Sirui Yang, Yanfang Jiang
BACKGROUND: Circulating follicular helper T (Tfh) cells are a heterogeneous population of CD4(+) helper T cells that promotes pathogenic immune responses in autoimmune diseases. In this study, we examined the status of different subpopulations of Tfh cells in peripheral circulation and their associations with various clinical characteristics of IgA vasculitis (IgAV). METHODS: According to the phenotypic expressions of different molecules, focus was given on six subpopulations of Tfh cells: CD4(+)CXCR5(+), CD4(+)CXCR5(+)ICOS(+), CD4(+)CXCR5(+)ICOS(+)PD-1(+), CD4(+)CXCR5(+)ICOS(high)PD-1(high), CD4(+)CXCR5(+)ICOS(-)PD-1(+), and CXCR5(+)CD45RA(-)IL-21(+)...
October 21, 2016: BMC Immunology
https://www.readbyqxmd.com/read/27762350/erratum-follicular-cxcr5-expressing-cd8-t-cells-curtail-chronic-viral-infection
#16
Ran He, Shiyue Hou, Cheng Liu, Anli Zhang, Qiang Bai, Miao Han, Yu Yang, Gang Wei, Ting Shen, Xinxin Yang, Lifan Xu, Xiangyu Chen, Yaxing Hao, Pengcheng Wang, Chuhong Zhu, Juanjuan Ou, Houjie Liang, Ting Ni, Xiaoyan Zhang, Xinyuan Zhou, Kai Deng, Yaokai Chen, Yadong Luo, Jianqing Xu, Hai Qi, Yuzhang Wu, Lilin Ye
No abstract text is available yet for this article.
October 19, 2016: Nature
https://www.readbyqxmd.com/read/27751964/altered-expression-of-glial-markers-chemokines-and-opioid-receptors-in-the-spinal-cord-of-type-2-diabetic-monkeys
#17
Norikazu Kiguchi, Huiping Ding, Christopher M Peters, Nancy D Kock, Shiroh Kishioka, J Mark Cline, Janice D Wagner, Mei-Chuan Ko
Neuroinflammation is a pathological condition that underlies diabetes and affects sensory processing. Given the high prevalence of pain in diabetic patients and crosstalk between chemokines and opioids, it is pivotal to know whether neuroinflammation-associated mediators are dysregulated in the central nervous system of diabetic primates. Therefore, the aim of this study was to investigate whether mRNA expression levels of glial markers, chemokines, and opioid receptors are altered in the spinal cord and thalamus of naturally occurring type 2 diabetic monkeys (n=7) compared with age-matched non-diabetic monkeys (n=6)...
October 14, 2016: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/27737526/enforced-expression-of-cxcr5-drives-t-follicular-regulatory-like-features-in-foxp3%C3%A2-%C2%BA-t-cells
#18
Young Uk Kim, Byung-Seok Kim, Hoyong Lim, Rick A Wetsel, Yeonseok Chung
CXCR5⁺ T follicular helper (Tfh) cells are associated with aberrant autoantibody production in patients with antibody-mediated autoimmune diseases including lupus. Follicular regulatory T (Tfr) cells expressing CXCR5 and Bcl6 have been recently identified as a specialized subset of Foxp3⁺ regulatory T (Treg) cells that control germinal center reactions. In this study, we show that retroviral transduction of CXCR5 gene in Foxp3⁺ Treg cells induced a stable expression of functional CXCR5 on their surface...
October 17, 2016: Biomolecules & Therapeutics
https://www.readbyqxmd.com/read/27708397/cxcl13-cxcr5-enhances-sodium-channel-nav1-8-current-density-via-p38-map-kinase-in-primary-sensory-neurons-following-inflammatory-pain
#19
Xiao-Bo Wu, De-Li Cao, Xin Zhang, Bao-Chun Jiang, Lin-Xia Zhao, Bin Qian, Yong-Jing Gao
CXCL13 is a B lymphocyte chemoattractant and activates CXCR5 receptor in the immune system. Here we investigated whether CXCL13/CXCR5 mediates inflammatory pain in dorsal root ganglia (DRG) and the underlying mechanisms. Peripheral injection of complete Freund's Adjuvant (CFA) increased the expression of CXCL13 and CXCR5 in DRG neurons. In Cxcr5(-/-) mice, CFA-induced pain hypersensitivity were attenuated. Whole-cell patch-clamp recording showed that the excitability of dissociated DRG neurons was increased after CFA injection or CXCL13 incubation from wild-type (WT) mice, but not from Cxcr5(-/-) mice...
October 6, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27704036/treatment-of-spontaneous-eae-by-laquinimod-reduces-tfh-b-cell-aggregates-and-disease-progression
#20
Michel Varrin-Doyer, Kara L Pekarek, Collin M Spencer, Claude C A Bernard, Raymond A Sobel, Bruce A C Cree, Ulf Schulze-Topphoff, Scott S Zamvil
OBJECTIVE: To evaluate the influence of oral laquinimod, a candidate multiple sclerosis (MS) treatment, on induction of T follicular helper cells, development of meningeal B cell aggregates, and clinical disease in a spontaneous B cell-dependent MS model. METHODS: Experimental autoimmune encephalomyelitis (EAE) was induced in C57BL/6 mice by immunization with recombinant myelin oligodendrocyte glycoprotein (rMOG) protein. Spontaneous EAE was evaluated in C57BL/6 MOG p35-55-specific T cell receptor transgenic (2D2) × MOG-specific immunoglobulin (Ig)H-chain knock-in (IgH(MOG-ki) [Th]) mice...
October 2016: Neurology® Neuroimmunology & Neuroinflammation
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