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Helios T cell

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https://www.readbyqxmd.com/read/29757588/association-of-regulatory-t-cells-with-diabetes-type-1-and-its-renal-and-vascular-complications-based-on-the-expression-of-forkhead-box-protein-p3-foxp3-helios-and-neurophilin-1
#1
Tahereh Khamechian, Behnaz Irandoust, Hanieh Mohammadi, Hassan Nikoueinejad, Hossein Akbari
In recent years, it has been recognized that regulatory T cells (Tregs) play a critical role in maintaining immune tolerance. Moreover, the expression of two markers named Helios and neurophilin-1 (NRP-1) has been highlighted in such cells. Helios, an intracellular transcription marker, largely differentiates twomost operative sub group of Tregs, namely naturally occurring (nTreg) and induced (iTreg) Tregs, and NRP-1 is reckoned as a membranous activity marker of Tregs. We aimed to count peripheral mononuclear cells expressing such markers in a group of type 1 diabetes patients to elucidate the possible role of Tregs in the pathogenesis of such disease and its complications...
April 2018: Iranian Journal of Allergy, Asthma, and Immunology
https://www.readbyqxmd.com/read/29725423/role-of-a-non-canonical-splice-variant-of-the-helios-gene-in-the-differentiation-of-acute-lymphoblastic-leukemic-t-cells
#2
Yinghui Li, Yanhua Liu, Can Liu, Fengyong Liu, Daolei Dou, Wenjie Zheng, Wei Liu, Feifei Liu
T-cell acute lymphoblastic leukemia is a hematopoietic malignant disease, which arises from a genetic defect in the T-cell maturation signaling pathway. As a result, it is necessary to identify the molecules that impact T-cell development and control lymphoid-lineage malignancy. The present study utilized Jurkat T lymphoblastic cells as a well-established approach for the investigation into the function of the non-canonical alternative splice variant of Helios for the in vitro study of T-cell differentiation and leukemogenesis...
May 2018: Oncology Letters
https://www.readbyqxmd.com/read/29698674/downregulation-in-helios-transcription-factor-signaling-is-associated-with-immune-dysfunction-in-blood-leukocytes-of-autistic-children
#3
Sheikh F Ahmad, Ahmed Nadeem, Mushtaq A Ansari, Saleh A Bakheet, Laila Yousef Al-Ayadhi, Sabry M Attia
Autism spectrum disorder (ASD) is a complex heterogeneous neurodevelopmental disorder in which immunological imbalance has been suggested to be a major etiological component. Helios, a transcription factor, has been studied extensively in the context of human T cell regulation in health and disease, yet the role of Helios signaling has not been examined in children with ASD. In the present study, we investigated the production of Helios in CD4+ , CD8+ , and TIM-3+ , CXCR3+ cells in typically developing (TD) controls and children with ASD and in peripheral blood mononuclear cells (PBMCs)...
April 23, 2018: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/29686686/autoimmune-lymphoproliferative-syndrome-fas-patients-have-an-abnormal-regulatory-t-cell-treg-phenotype-but-display-normal-natural-treg-suppressive-function-on-t-cell-proliferation
#4
Fabienne Mazerolles, Marie-Claude Stolzenberg, Olivier Pelle, Capucine Picard, Benedicte Neven, Alain Fischer, Aude Magerus-Chatinet, Frederic Rieux-Laucat
Objective: Autoimmune lymphoproliferative syndrome (ALPS) with FAS mutation (ALPS-FAS) is a nonmalignant, noninfectious, lymphoproliferative disease with autoimmunity. Given the central role of natural regulatory T cells (nTregs) in the control of lymphoproliferation and autoimmunity, we assessed nTreg-suppressive function in 16 patients with ALPS-FAS. Results: The proportion of CD25high CD127low Tregs was lower in ALPS-FAS patients than in healthy controls. This subset was correlated with a reduced CD25 expression in CD3+ CD4+ T cells from ALPS patients and thus an abnormally low proportion of CD25high FOXP3+ Helios+ T cells...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29656112/influence-of-immunosuppressive-drugs-on-the-cd30-molecule-in-kidney-transplanted-patients
#5
Patricia Cristina Grenzi, Érika Fernandes Campos, Hélio Tedesco-Silva, Claudia Rosso Felipe, Maria Fernanda Soares, José Medina-Pestana, Hinrich Peter Hansen, Maria Gerbase-DeLima
BACKGROUND: Soluble CD30 (sCD30) is a suggested marker for kidney transplantation outcomes. We investigated whether sCD30 serum levels are influenced by immunosuppression and whether they correlate with findings in protocol biopsies and with CD30 gene expression in peripheral blood mononuclear cells (PBMC). METHODS: We studied 118 kidney transplant recipients that initially received tacrolimus (TAC) and, at month-3, were converted or not to sirolimus (SRL). RESULTS: sCD30 serum levels gradually declined after transplantation, being the decline more pronounced in the SRL group...
April 12, 2018: Human Immunology
https://www.readbyqxmd.com/read/29617057/antigen-specific-helios-neuropilin-1-tregs-induce-apoptosis-of-autoreactive-b-cells-via-pd-l1
#6
Janine Gotot, Ermanila Dhana, Hideo Yagita, Romina Kaiser, Isis Ludwig-Portugall, Christian Kurts
Regulatory T cells (Tregs) maintain self-tolerance and prevent autoimmunity by controlling autoreactive T cells. We recently demonstrated in vivo that Tregs can directly suppress auto-reactive B cells via programmed death ligand 1 (PD-L1) that ligated PD-1 on B cells and caused them to undergo apoptosis. Here we asked whether this mechanism is utilized by thymus-derived natural Tregs and/or by peripheral lymphoid tissue-induced Tregs. We first demonstrated that antigen-specific PD-L1-expressing Tregs were induced in the draining lymph node (LN) of autoantigen-expressing tissue and characterized them by their lack of the transcription factor Helios and of the surface marker Neuropilin-1 (Nrp-1)...
April 4, 2018: Immunology and Cell Biology
https://www.readbyqxmd.com/read/29455107/helios-expression-in-regulatory-t-cells-promotes-immunosuppression-angiogenesis-and-the-growth-of-leukemia-cells-in-pediatric-acute-lymphoblastic-leukemia
#7
Xue Li, Dong Li, Xiaoyang Huang, Panpan Zhou, Qing Shi, Bing Zhang, Xiuli Ju
Regulatory T cells (Tregs) characterized by the transcription factor forkhead box P3 (FoxP3) are crucial for maintaining immune tolerance and preventing autoimmunity. However, FoxP3 does not function alone and Helios is considered a potential candidate for defining Treg subsets. In this study, we investigated the expression and function of Helios for identifying Tregs in childhood precursor B-cell acute lymphoblastic leukemia (pre-B ALL). Our results demonstrated that patients with pre-B ALL had a higher percentage of Helios+ FoxP3+ CD4+ Tregs...
April 2018: Leukemia Research
https://www.readbyqxmd.com/read/29440380/comparative-transcriptome-analysis-reveals-distinct-genetic-modules-associated-with-helios-expression-in-intratumoral-regulatory-t-cells
#8
Kathleen Yates, Kevin Bi, W Nicholas Haining, Harvey Cantor, Hye-Jung Kim
Regulatory T cells (Tregs) are key modulators of immune tolerance, capable of suppressing inflammatory immune responses and promoting nonlymphoid tissue homeostasis. Helios, a transcription factor (TF) that is selectively expressed by Tregs, has been shown to be essential for the maintenance of Treg lineage stability in the face of inflammatory conditions that include autoimmune disease and cancer. Helios-deficient Tregs within tumors acquire effector T cell function and contribute to immune responses against cancer...
February 27, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29411880/indirect-presentation-in-the-thymus-limits-naive-and-regulatory-t-cell-differentiation-by-promoting-deletion-of-self-reactive-thymocytes
#9
Jin Yan Yap, Rushika C Wirasinha, Anna Chan, Debbie R Howard, Christopher C Goodnow, Stephen R Daley
Acquisition of T-cell central tolerance involves distinct pathways of self-antigen presentation to thymocytes. One pathway termed indirect presentation requires a self-antigen transfer step from thymic epithelial cells (TECs) to bone marrow-derived cells before the self-antigen is presented to thymocytes. The role of indirect presentation in central tolerance is context-dependent, potentially due to variation in self-antigen expression, processing and presentation in the thymus. Here, we report experiments in mice in which TECs expressed a membrane-bound transgenic self-antigen, hen egg lysozyme (HEL), from either the insulin (insHEL) or thyroglobulin (thyroHEL) promoter...
February 7, 2018: Immunology
https://www.readbyqxmd.com/read/29403500/human-immunodeficiency-virus-type-1-elite-controllers-maintain-low-co-expression-of-inhibitory-receptors-on-cd4-t-cells
#10
Kajsa Noyan, Son Nguyen, Michael R Betts, Anders Sönnerborg, Marcus Buggert
Human immunodeficiency virus type-1 (HIV-1) elite controllers (ELCs) represent a unique population that control viral replication in the absence of antiretroviral therapy (cART). It is well established that expression of multiple inhibitory receptors on CD8+ T cells is associated with HIV-1 disease progression. However, whether reduced co-expression of inhibitory receptors on CD4+ T cells is linked to natural viral control and slow HIV-1 disease progression remains undefined. Here, we report on the expression pattern of numerous measurable inhibitory receptors, associated with T cell exhaustion (programmed cell death-1, CTLA-4, and TIGIT), on different CD4+ T cell memory populations in ELCs and HIV-infected subjects with or without long-term cART...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29299806/role-of-%C3%AE-fetoprotein-in-differentiation-of-regulatory-t-lymphocytes
#11
V A Chereshnev, V P Timganova, S A Zamorina, M S Bochkova, P V Khramtsov, M D Kropaneva, M B Raev
The effect of native α-fetoprotein (AFP) on the expression of T-regulatory lymphocyte (Treg) markers by activated CD4+ lymphocytes with different proliferative status was studied. α-Fetoprotein did not affect the ratio of proliferating and non-proliferating activated CD4+ cells. In the study of Treg differentiation, it was found that AFP at concentrations of 50 and 100 μg/mL significantly inhibited the number of nonproliferating CD4+ FOXP3+ and CD4+ FOXP3+ HELIOS+ lymphocytes without affecting the expression of Treg markers by proliferating CD4+ lymphocytes...
November 2017: Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
https://www.readbyqxmd.com/read/29278858/the-ikaros-family-in-lymphocyte-development
#12
REVIEW
Beate Heizmann, Philippe Kastner, Susan Chan
The IKZF family of transcription factors are essential regulators of lymphopoiesis. Ikaros, Helios, Aiolos and Eos function as transcriptional repressors and activators during T and B cell differentiation and in mature cell function, depending on the stage of development and/or cell type. Their potential mechanisms of action are varied. Ikaros family proteins partner with multiple complexes, including NuRD, PRC2 and transcription elongation factors, to modulate gene expression and the chromatin state. In humans, mutations in the IKZF genes are associated with B cell deficiency, leukemias and autoimmunity...
December 23, 2017: Current Opinion in Immunology
https://www.readbyqxmd.com/read/29259350/decreased-helios-expression-in-regulatory-t-cells-in-acute-coronary-syndrome
#13
Lili Jiang, Feng Chen, Xiaofan Hu, Yingying Hu, Yange Wang, Wenyong Zhang, Yudong Peng, Longxian Cheng
Regulatory T cells (Tregs) play an essential role in acute coronary syndrome (ACS). However, there is debate about which Treg subsets are truly critical to ACS. Helios, a transcription factor, was recently reported to be a bona fide marker for natural Tregs or activated Tregs with a suppression function, but little is known about its role in ACS. We therefore examined Helios+ Tregs in patients with ACS, patients with stable angina, and control subjects. 73 patients with ACS, 30 patients with stable angina, and 48 control subjects were enrolled...
2017: Disease Markers
https://www.readbyqxmd.com/read/29246111/helios-regulatory-t-cell-frequencies-are-correlated-with-control-of-viral-replication-and-recovery-of-absolute-cd4-t-cells-counts-in-early-hiv-1-infection
#14
Raquel Matavele Chissumba, Eduardo Namalango, Vânia Maphossa, Ivalda Macicame, Nilesh Bhatt, Christina Polyak, Merlin Robb, Nelson Michael, Ilesh Jani, Luc Kestens
BACKGROUND: The acute phase of HIV infection is characterized by massive depletion of CD4 T cells, high viral plasma levels and pronounced systemic immune activation. Regulatory T cells (Tregs) have the potential to control systemic immune activation but also to suppress antigen specific T and B cell response. The co-expression of FoxP3 and Helios transcription factors, has been described for identification of highly suppressive Tregs. The aim of this study was to characterize the phenotype of classic Tregs during early HIV infection, and to assess the correlations between the frequencies and phenotype of Tregs with the plasma viral load, CD4 counts, immune activation and the frequency of antibodies reactive to HIV-1 proteins, measured by an immunochromatographic test...
December 16, 2017: BMC Immunology
https://www.readbyqxmd.com/read/29221730/ablation-of-transcription-factor-irf4-promotes-transplant-acceptance-by-driving-allogenic-cd4-t-cell-dysfunction
#15
Jie Wu, Hedong Zhang, Xiaomin Shi, Xiang Xiao, Yihui Fan, Laurie J Minze, Jin Wang, Rafik M Ghobrial, Jiahong Xia, Roger Sciammas, Xian C Li, Wenhao Chen
CD4+ T cells orchestrate immune responses and destruction of allogeneic organ transplants, but how this process is regulated on a transcriptional level remains unclear. Here, we demonstrated that interferon regulatory factor 4 (IRF4) was a key transcriptional determinant controlling T cell responses during transplantation. IRF4 deletion in mice resulted in progressive establishment of CD4+ T cell dysfunction and long-term allograft survival. Mechanistically, IRF4 repressed PD-1, Helios, and other molecules associated with T cell dysfunction...
December 19, 2017: Immunity
https://www.readbyqxmd.com/read/29197677/distinct-biomarker-profiles-in-ex-vivo-t-cell-depletion-graft-manipulation-strategies-cd34-selection-versus-cd3-19-depletion-in-matched-sibling-allogeneic-peripheral-blood-stem-cell-transplantation
#16
Caroline R Cantilena, Sawa Ito, Xin Tian, Prachi Jain, Fariba Chinian, Prathima Anandi, Keyvan Keyvanfar, Debbie Draper, Eleftheria Koklanaris, Sara Hauffe, Jeanine Superata, David Stroncek, Pawel Muranski, A John Barrett, Minoo Battiwalla
Various approaches have been developed for ex vivo T cell depletion in allogeneic stem cell transplantation to prevent graft-versus-host disease (GVHD). Direct comparisons of T cell depletion strategies have not been well studied, however. We evaluated cellular and plasma biomarkers in 2 different graft manipulation strategies, CD3+ CD19+ cell depletion (CD3/19D) versus CD34+ selection (CD34S), and their associations with clinical outcomes. Identical conditions, including the myeloablative preparative regimen, HLA-identical sibling donor, GVHD prophylaxis, and graft source, were used in the 2 cohorts...
March 2018: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/29127350/memory-regulatory-t-cells-increase-only-in-inflammatory-phase-of-chronic-hepatitis-b-infection-and-related-to-galectin-9-tim-3-interaction
#17
Ching-Chih Hu, Wen-Juei Jeng, Yi-Cheng Chen, Jian-He Fang, Chien-Hao Huang, Wei Teng, Yi-Chung Hsieh, Yung-Chang Lin, Rong-Nan Chien, I-Shyan Sheen, Chun-Yen Lin
CD4+ Foxp3+ regulatory T cells (Tregs) are the main immune suppressors with subpopulation of inflamed-tissue related memory Tregs (mTregs) and non-related resting Treg (rTregs). Previously, Treg was proposed to be the cause of chronicity of hepatitis B virus (HBV) infection but with controversies. We then investigated the role of mTregs in distinct immune phases of chronic HBV infection, especially the non-inflammatory versus inflammatory phases. It was found mTregs but not rTregs increased only in the inflammatory phase and correlated with serum alanine aminotransferase (ALT) level...
November 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29124456/serial-immunological-parameters-in-a-phase-ii-trial-of-exemestane-and-low-dose-oral-cyclophosphamide-in-advanced-hormone-receptor-positive-breast-cancer
#18
Maryann Kwa, Xiaochun Li, Yelena Novik, Ruth Oratz, Komal Jhaveri, Jennifer Wu, Ping Gu, Marleen Meyers, Franco Muggia, James Speyer, Alyssa Iwano, Maryam Bonakdar, Lina Kozhaya, Ece Tavukcuoglu, Bahar Budan, Roy Raad, Judith D Goldberg, Derya Unutmaz, Sylvia Adams
BACKGROUND AND PURPOSE: Resistance to endocrine therapies in hormone receptor (HR)-positive breast cancer is a significant challenge. Prior studies have shown that low-dose oral cyclophosphamide can transiently deplete regulatory T cells (Tregs) and improve anti-tumor immunity. We investigated the combination of exemestane with cyclophosphamide in patients with advanced HR-positive breast cancer and assessed changes in circulating immune cell subsets. METHODS: This was a single-arm phase II trial of exemestane with cyclophosphamide in patients with metastatic HR-positive/HER2-negative breast cancer who had progressed on prior endocrine therapy (ClinicalTrials...
February 2018: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/29124315/the-class-i-iv-hdac-inhibitor-mocetinostat-increases-tumor-antigen-presentation-decreases-immune-suppressive-cell-types-and-augments-checkpoint-inhibitor-therapy
#19
David Briere, Niranjan Sudhakar, David M Woods, Jill Hallin, Lars D Engstrom, Ruth Aranda, Harrah Chiang, Andressa L Sodré, Peter Olson, Jeffrey S Weber, James G Christensen
Checkpoint inhibitor therapy has led to major treatment advances for several cancers including non-small cell lung cancer (NSCLC). Despite this, a significant percentage of patients do not respond or develop resistance. Potential mechanisms of resistance include lack of expression of programmed death ligand 1 (PD-L1), decreased capacity to present tumor antigens, and the presence of an immunosuppressive tumor microenvironment. Mocetinostat is a spectrum-selective inhibitor of class I/IV histone deacetylases (HDACs), a family of proteins implicated in epigenetic silencing of immune regulatory genes in tumor and immune cells...
March 2018: Cancer Immunology, Immunotherapy: CII
https://www.readbyqxmd.com/read/29069245/belatacept-in-kidney-transplantation-past-and-future-perspectives
#20
Zaki Siddiqui, Hélio Tedesco-Silva, Leonardo V Riella
Calcineurin inhibitors (CNIs) are used widely for maintenance immunosuppression in renal transplant recipients. However, their side effect profile has led researchers to attempt to find safer alternatives that can maintain effective long-term immunosuppression with less toxicity. Belatacept is a CTLA4-Ig molecule designed to block the costimulatory B7-CD28 signal needed for activation of effector T cells. While it has shown great promise in clinical trials, it has made halting progress towards replacing CNIs in actual clinical practice...
April 2017: Jornal Brasileiro de Nefrologia: ʹorgão Oficial de Sociedades Brasileira e Latino-Americana de Nefrologia
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