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Tregs

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https://www.readbyqxmd.com/read/29457218/regulatory-t-cells-are-required-for-normal-and-activin-promoted-wound-repair-in-mice
#1
Eric Haertel, Natasha Joshi, Paul Hiebert, Manfred Kopf, Sabine Werner
Healing of skin wounds is orchestrated by various types of immune cells, but little is known about the role of FoxP3+ regulatory T cells (Tregs) in this process. Here we determined if Tregs are important for wound healing in normal mice and if they contribute to the accelerated healing of mice overexpressing the growth and differentiation factor activin. Diphtheria-toxin induced Treg depletion prior to injury caused impaired healing characterized by delayed re-epithelialization, reduced wound contraction and impaired vessel maturation...
February 19, 2018: European Journal of Immunology
https://www.readbyqxmd.com/read/29456737/distinctive-profiles-of-tumor-infiltrating-immune-cells-and-association-with-intensity-of-infiltration-in-colorectal-cancer
#2
Yugang Wu, Lei Yuan, Qicheng Lu, Haiyan Xu, Xiaozhou He
Tumor-infiltrating immune cells are heterogeneous and consist of characteristic compartments, including T helper (Th)1 and regulatory T (Treg) cells that exhibit distinctive biological functions. The present study investigated the profile of infiltrating immune cells from surgically removed tumor tissues from patients with colorectal cancer. The characteristic transcription factors of Th1 and Th2 cells, Treg cells, Th17 cells and T follicular helper (Tfh) cells were analyzed. The results demonstrated that a marked increased number of Treg cells presented in tumor infiltrates when compared with non-tumor adjacent tissues...
March 2018: Oncology Letters
https://www.readbyqxmd.com/read/29456692/effects-of-th17-treg-cell-imbalance-on-hiv-replication-in-patients-with-aids-complicated-with-tuberculosis
#3
Yanshuang Li, Weijia Sun
The purpose of this study was to determine the effect of Th17/Treg cell imbalance on HIV replication in patients with AIDS complicated with tuberculosis (TB). We selected 32 patients with AIDS combined with TB infection in our hospital and 30 healthy individual as controls. The Th17/Treg ratio in peripheral blood lymphocytes was detected by flow cytometry. Compared with healthy subjects, Th17 cells first declined in HIV patients with TB, but gradually increased over the course of the disease. Treg showed an increasing trend in HIV patients with TB...
March 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29456671/current-perspectives-of-sa-4-1bbl-in-immune-modulation-during-cancer
#4
Shu-Ni Zhou, Rui-Zhi Ran, Li-Li Tan, Hao Guo
A recombinant co-stimulatory molecule capable of inducing multiple effects on varied immune cells when present in its soluble active form is termed as SA-4-1BBL. It has been reported to influence innate, adaptive, and regulatory immune cells. Recent studies confirmed its engagement with receptor, 4-1BB leading to collection of interleukin-2 (IL-2) that in turn overcomes Treg suppression. Further, a vast number of pre-clinical studies reported its therapeutic efficacy in the form of adjuvant subunit in cancer vaccines...
March 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29456655/effect-of-immune-tolerance-induced-by-immature-dendritic-cells-and-ctla4-ig-on-systemic-lupus-erythematosus-an-in-vivo-study
#5
Cuili Huang, Lidan Zhang, Fang Ling, Sijian Wen, Yanyan Luo, Hui Liu, Jingping Liu, Wenjun Zheng, Ming Liang, Jian Sun, You-Kun Lin
Systemic lupus erythematosus (SLE) is a multi-organ autoimmune disease in which tissue damage is caused by autoantibodies. The induction of specific immune tolerance, including the utilization of immune regulatory cells, may enhance the therapeutic effects of organ transplantation in patients with SLE. Furthermore, inhibiting immune responses has been reported to be an effective treatment for SLE. However, few studies have explored the association between an increased immune tolerance and a decreased immune response in SLE treatment...
March 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29456534/critical-role-of-tgf-%C3%AE-and-il-2-receptor-signaling-in-foxp3-induction-by-an-inhibitor-of-dna-methylation
#6
Kristin Freudenberg, Nadja Lindner, Sebastian Dohnke, Annette I Garbe, Sonja Schallenberg, Karsten Kretschmer
Under physiological conditions, CD4+ regulatory T (Treg) cells expressing the transcription factor Foxp3 are generated in the thymus [thymus-derived Foxp3+ Treg (tTregs) cells] and extrathymically at peripheral sites [peripherally induced Foxp3+ Treg (pTreg) cell], and both developmental subsets play non-redundant roles in maintaining self-tolerance throughout life. In addition, a variety of experimental in vitro and in vivo modalities can extrathymically elicit a Foxp3+ Treg cell phenotype in peripheral CD4+ Foxp3- T cells, which has attracted much interest as an approach toward cell-based therapy in clinical settings of undesired immune responses...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29456159/cd150-high-bone-marrow-tregs-maintain-hematopoietic-stem-cell-quiescence-and-immune-privilege-via-adenosine
#7
Yuichi Hirata, Kazuhiro Furuhashi, Hiroshi Ishii, Hao Wei Li, Sandra Pinho, Lei Ding, Simon C Robson, Paul S Frenette, Joji Fujisaki
A crucial player in immune regulation, FoxP3+ regulatory T cells (Tregs) are drawing attention for their heterogeneity and noncanonical functions. Here, we describe a Treg subpopulation that controls hematopoietic stem cell (HSC) quiescence and engraftment. These Tregs highly expressed an HSC marker, CD150, and localized within the HSC niche in the bone marrow (BM). Specific reduction of BM Tregs achieved by conditional deletion of CXCR4 in Tregs increased HSC numbers in the BM. Adenosine generated via the CD39 cell surface ectoenzyme on niche Tregs protected HSCs from oxidative stress and maintained HSC quiescence...
February 7, 2018: Cell Stem Cell
https://www.readbyqxmd.com/read/29455908/increased-degradation-of-atp-is-driven-by-memory-regulatory-t-cells-in-kidney-transplantation-tolerance
#8
Maxim Durand, Florian Dubois, Cécile Dejou, Eugénie Durand, Richard Danger, Mélanie Chesneau, Carole Brosseau, Pierrick Guerif, Jean-Paul Soulillou, Nicolas Degauque, Jean-François Eliaou, Magali Giral, Nathalie Bonnefoy, Sophie Brouard
Regulatory T cells were recently proposed as the central actor in operational tolerance after renal transplantation. Tolerant patients harbor increased FoxP3hi memory Treg frequency and increased demethylation in the Foxp3 Treg-specific demethylated region when compared to stable kidney recipients and exhibit greater memory Treg suppressive capacities and higher expression of the ectonucleotidase CD39. However, in this particular and unique situation the mechanisms of action of Tregs were not identified. Thus, we analyzed the ability of memory Tregs to degrade extracellular ATP in tolerant patients, healthy volunteers, and patients with stable graft function under immunosuppression and determined the role of immunosuppressive drugs on this process...
February 15, 2018: Kidney International
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
#9
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...
February 14, 2018: Leukemia Research
https://www.readbyqxmd.com/read/29454913/restoring-th17-treg-balance-via-modulation-of-stat3-and-stat5-activation-contributes-to-the-amelioration-of-chronic-obstructive-pulmonary-disease-by-bufei-yishen-formula
#10
Peng Zhao, Jiansheng Li, Yange Tian, Jing Mao, Xuefang Liu, Suxiang Feng, Junzi Li, Qingqing Bian, Huige Ji, Lanxi Zhang
ETHNOPHARMACOLOGY RELEVANCE: Bufei Yishen formula (BYF), a Traditional Chinese Medicine (TCM), has been extensively applied in clinical treatment of chronic obstructive pulmonary disease (COPD) and provides an effective treatment strategy for the syndrome of lung-kidney qi deficiency in COPD patients. Here, we investigated its anti-COPD mechanism in COPD rats in relation to the balance between T helper (Th) 17 cells and regulatory T (Treg) cells. METHODS: Rat model of cigarette smoke- and bacterial infection-induced COPD was established, and orally treated with BYF for 12 consecutive weeks...
February 15, 2018: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/29454648/foxp3-renders-activated-human-regulatory-t-cells-resistant-to-restimulation-induced-cell-death-by-suppressing-sap-expression
#11
Gil Katz, Kelsey Voss, Toria F Yan, Yong Chan Kim, Robert L Kortum, David W Scott, Andrew L Snow
Restimulation-induced cell death (RICD) is an apoptotic program that regulates effector T cell expansion, triggered by repeated stimulation through the T cell receptor (TCR) in the presence of interleukin-2 (IL-2). Although CD4+ regulatory T cells (Tregs) consume IL-2 and experience frequent TCR stimulation, they are highly resistant to RICD. Resistance in Tregs is dependent on the forkhead box P3 (FOXP3) transcription factor, although the mechanism remains unclear. T cells from patients with X-linked lymphoproliferative disease (XLP-1), that lack the adaptor molecule SLAM-associated protein (SAP), are also resistant to RICD...
February 12, 2018: Cellular Immunology
https://www.readbyqxmd.com/read/29454374/effects-of-umbilical-cord-blood-cells-and-subtypes-to-reduce-neuroinflammation-following-perinatal-hypoxic-ischemic-brain-injury
#12
Courtney A McDonald, Tayla R Penny, Madison C B Paton, Amy E Sutherland, Lakshmi Nekkanti, Tamara Yawno, Margie Castillo-Melendez, Michael C Fahey, Nicole M Jones, Graham Jenkin, Suzanne L Miller
BACKGROUND: It is well understood that hypoxic-ischemic (HI) brain injury during the highly vulnerable perinatal period can lead to cerebral palsy, the most prevalent cause of chronic disability in children. Recently, human clinical trials have reported safety and some efficacy following treatment of cerebral palsy using umbilical cord blood (UCB) cells. UCB is made up of many different cell types, including endothelial progenitor cells (EPCs), T regulatory cells (Tregs), and monocyte-derived suppressor cells (MDSCs)...
February 17, 2018: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/29454004/identification-and-analysis-of-peanut-specific-t-effector-and-t-regulatory-cells-in-children-allergic-and-tolerant-to-peanut
#13
Katherine A Weissler, Marjohn Rasooly, Tom DiMaggio, Hyejeong Bolan, Daly Cantave, David Martino, Melanie R Neeland, Mimi Lk Tang, Thanh D Dang, Katrina J Allen, Pamela A Frischmeyer-Guerrerio
BACKGROUND: Peanut allergy is potentially life-threatening and generally persists lifelong. Recent data suggests the skin may be an important route of initial sensitization to peanut, while early oral exposure to peanut is protective. In mice, T regulatory cells (Tregs) are central to development of tolerance to food, but their contribution to the pathogenesis of food allergy in humans is less clear. OBJECTIVE: We sought to quantify and phenotype peanut-specific CD4+ T effector (ps-Teff) and ps-Tregs in children with and without peanut allergy or sensitization...
February 14, 2018: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29453928/cd4-cd25-cd127low-foxp3-regulatory-t-cells-in-crohn-s-disease
#14
Ali Khalili, Soheil Ebrahimpour, Iradj Maleki, Saeid Abediankenari, Mousa Mohammadnia Afrouzi
BACKGROUND: Regulatory T (Treg) cell play a key role in autoimmune diseases. We evaluated the regulatory function and frequency of Treg cells and secreted IL-10, IL-35 concentration in Crohn's disease (CD). METHODS: Twenty-three patients with CD and 25 healthy controls (HC) were included in this study. We analysed the alteration of Tregs frequency using flow cytometry for CD4, CD25, CD127 and FoxP3 markers. Surface expression of CD4, CD25 and CD127 markers were used for isolation of a relatively pure Treg cells...
February 16, 2018: Romanian Journal of Internal Medicine, Revue Roumaine de Médecine Interne
https://www.readbyqxmd.com/read/29453746/effect-of-aerobic-exercise-on-treg-and-th17-of-rats-with-ischemic-cardiomyopathy
#15
Zhisong Chen, Wenwen Yan, Yu Mao, Yi Ni, Lin Zhou, Haoming Song, Wenjun Xu, Leming Wang, Yuqin Shen
Immune activation and inflammation participate in the progression of chronic heart failure (CHF). Th17 cells and CD4+CD25+ regulatory T (Treg) cells both come from naive Th cells and share reciprocal development pathways but exhibit opposite effects. We hypothesized that the Th17/Treg balance was impaired in patients with CHF, and exercise can improve it. Rats with ischemic cardiomyopathy were prepared by ligaturing the left anterior descending branch of the left coronary artery. Rats in training group were trained with treadmill; Th17 cells increased significantly while Treg cells significantly decreased in s by flow cytometry, and the peripheral blood level of IL-6, IL-17, and TNF-α was obviously elevated by ELISA assay...
February 16, 2018: Journal of Cardiovascular Translational Research
https://www.readbyqxmd.com/read/29453607/semaphorin-7a-in-circulating-regulatory-t-cells-is-increased-in-autosomal-dominant-polycystic-kidney-disease-and-decreases-with-tolvaptan-treatment
#16
Yashang Lee, Katrina Lehmann Blount, Feng Dai, Siobhan Thompson, Jonathan Kaufman Scher, Sherrie Bitterman, Madeline Droher, Erica L Herzog, Gilbert Moeckel, Anil Karihaloo, Neera K Dahl
BACKGROUND: Semaphorin 7A (SEMA7A) is an immunomodulating protein implicated in lung and liver fibrosis. In autosomal-dominant polycystic kidney disease (ADPKD), the progressive expansion of renal cysts, inflammation, and subsequent renal fibrosis leads to end-stage renal disease (ESRD). SEMA7A may play a role in renal fibrosis and in ADPKD. METHODS: We evaluated Sema7a in a mouse model of renal fibrosis and determined the expression of SEMA7A in human ADPKD kidney...
February 16, 2018: Clinical and Experimental Nephrology
https://www.readbyqxmd.com/read/29453041/microrna-signature-of-regulatory-t-cells-in-health-and-autoimmunity
#17
REVIEW
Mehdi Soltanzadeh-Yamchi, Mehdi Shahbazi, Saeed Aslani, Mousa Mohammadnia-Afrouzi
MicroRNAs (miRNAs) are small RNA molecules with regulatory functions on the expression of genes through binding directly to target messenger RNA (mRNA) transcripts, eventuating in gene expression suppression via translational hindrance and/or target mRNA cleavage. These molecules have been established to participate in numerous critical cellular settings, including differentiation, development, and function of immune cells. As an important suppressor cell of immune system, regulatory T cells (Tregs) are important in modulating the immune homeostasis as well as tolerance to self-antigens...
February 13, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29452585/beta-2-adrenergic-receptors-increase-treg-cell-suppression-in-an-ova-induced-allergic-asthma-mouse-model-when-mice-are-moderate-aerobically-exercised
#18
Kari J Dugger, Taylor Chrisman, Sarah L Sayner, Parker Chastain, Kacie Watson, Robert Estes
BACKGROUND: The potency of T regulatory (TREG) cells to inhibit T helper (Th)-driven immune cell responses has been linked to increased intracellular cyclic-AMP (cAMP) levels of TREG cells. In an ovalbumin (OVA)-driven allergic asthma mouse model, moderate aerobic exercise increases TREG cell function in a contact-dependent manner that leads to a significant reduction in chronic inflammation and restoration of lung function. However, the mechanism, whereby exercise increases TREG function, remains unknown and was the focus of these investigations...
February 17, 2018: BMC Immunology
https://www.readbyqxmd.com/read/29450641/chronic-lymphocytic-leukemia-cells-acquire-regulatory-b-cell-properties-in-response-to-tlr9-and-cd40-activation
#19
Shimrit Ringelstein-Harlev, Irit Avivi, Mona Fanadka, Netanel A Horowitz, Tami Katz
Circulating chronic lymphocytic leukemia (CLL) cells share phenotypic features with certain subsets of regulatory B-cells (Bregs). The latter cells have been reported to negatively regulate immune cell responses, mostly by provision of IL-10. The purpose of the current study was to identify and delineate Breg properties of CLL cells. B-cells and T-cells were obtained from the peripheral blood of untreated CLL patients diagnosed according to the 2008 Guidelines of the International Workshop on Chronic Lymphocytic Leukemia...
February 15, 2018: Cancer Immunology, Immunotherapy: CII
https://www.readbyqxmd.com/read/29449887/role-of-the-t-and-b-lymphocytes-in-pathogenesis-of-autoimmune-thyroid-diseases
#20
Marta Rydzewska, Michał Jaromin, Izabela Elżbieta Pasierowska, Karlina Stożek, Artur Bossowski
Autoimmune thyroid disorders (AITD) broadly include Graves' disease and Hashimoto's thyroiditis which are the most common causes of thyroid gland dysfunctions. These disorders develop due to complex interactions between environmental and genetic factors and are characterized by reactivity to self-thyroid antigens due to autoreactive lymphocytes escaping tolerance. Both cell-mediated and humoral responses lead to tissue injury in autoimmune thyroid disease. The differentiation of CD4+ cells in the specific setting of immune mediators (for example cytokines, chemokines) results in differentiation of various T cell subsets...
2018: Thyroid Research
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