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https://www.readbyqxmd.com/read/29180490/identity-and-diversity-of-human-peripheral-th-and-t-regulatory-cells-defined-by-single-cell-mass-cytometry
#1
Matthew A Kunicki, Laura C Amaya Hernandez, Kara L Davis, Rosa Bacchetta, Maria-Grazia Roncarolo
Human CD3+CD4+ Th cells, FOXP3+ T regulatory (Treg) cells, and T regulatory type 1 (Tr1) cells are essential for ensuring peripheral immune response and tolerance, but the diversity of Th, Treg, and Tr1 cell subsets has not been fully characterized. Independent functional characterization of human Th1, Th2, Th17, T follicular helper (Tfh), Treg, and Tr1 cells has helped to define unique surface molecules, transcription factors, and signaling profiles for each subset. However, the adequacy of these markers to recapitulate the whole CD3+CD4+ T cell compartment remains questionable...
November 27, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29163504/butyrate-conditions-human-dendritic-cells-to-prime-type-1-regulatory-t-cells-via-both-histone-deacetylase-inhibition-and-g-protein-coupled-receptor-109a-signaling
#2
Maria M M Kaisar, Leonard R Pelgrom, Alwin J van der Ham, Maria Yazdanbakhsh, Bart Everts
Recently, it has become clear that short-chain fatty acids (SCFAs), and in particular butyrate, have anti-inflammatory properties. Murine studies have shown that butyrate can promote regulatory T cells via the induction of tolerogenic dendritic cells (DCs). However, the effects of SCFAs on human DCs and how they affect their capacity to prime and polarize T-cell responses have not been addressed. Here, we report that butyrate suppresses LPS-induced maturation and metabolic reprogramming of human monocyte-derived DCs (moDCs) and conditions them to polarize naive CD4+ T cells toward IL-10-producing type 1 regulatory T cells (Tr1)...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29163480/differentiation-of-il-17-producing-invariant-natural-killer-t-cells-requires-expression-of-the-transcription-factor-c-maf
#3
Jhang-Sian Yu, Michito Hamada, Shigeo Ohtsuka, Keigyou Yoh, Satoru Takahashi, Shi-Chuen Miaw
c-Maf belongs to the large Maf family of transcription factors and plays a key role in the regulation of cytokine production and differentiation of TH2, TH17, TFH, and Tr1 cells. Invariant natural killer T (iNKT) cells can rapidly produce large quantity of TH-related cytokines such as IFN-γ, IL-4, and IL-17A upon stimulation by glycolipid antigens, such as α-galactosylceramide (α-GalCer). However, the role of c-Maf in iNKT cells and iNKT cells-mediated diseases remains poorly understood. In this study, we demonstrate that α-GalCer-stimulated iNKT cells express c-Maf transcript and protein...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29158953/retention-of-movement-technique-implications-for-primary-prevention-of-acl-injuries
#4
Wouter Welling, Anne Benjaminse, Alli Gokeler, Bert Otten
Background: Retention of movement technique is crucial in anterior cruciate ligament (ACL) injury prevention programs. It is unknown if specific instructions or video instructions result in changes in kinematic and kinetic measures during a relatively short training session, and in a retention test one week later. Hypothesis/Purpose: The purpose was to determine the effects of verbal external focus (EF), verbal internal focus (IF) and video instructions (VI) on landing technique (i...
November 2017: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/29155454/harnessing-the-power-of-regulatory-t-cells-to-control-autoimmune-diabetes-overview-and-perspective
#5
REVIEW
Hua Yu, Ricardo Paiva, Richard A Flavell
Type 1 diabetes (T1D) is a T cell-mediated autoimmune disease resulting in islet β-cell destruction, hypoinsulinemia, and severely altered glucose homeostasis. Although the mechanisms that initiate T1D still remain elusive, a breakdown of immune tolerance between effector T cells (Teff) and regulatory T cells (Treg) is considered to be the crucial component leading to autoimmunity. As such, strategies have been developed to boost the number and/or function of Treg in the hope of specifically hampering the pathogenic Teff activity...
November 20, 2017: Immunology
https://www.readbyqxmd.com/read/29151021/regulatory-t-cells-induced-by-b-cells-a-novel-subpopulation-of-regulatory-t-cells
#6
REVIEW
Chien-Hui Chien, Bor-Luen Chiang
Regulatory T cells play a crucial role in the homeostasis of the immune response. In addition to CD4(+)Foxp3(+) regulatory T cells, several subsets of Foxp3(-) regulatory T cells, such as T helper 3 (Th3) cells and type 1 regulatory T (Tr1) cells, have been described in mice and human. Accumulating evidence shows that naïve B cells contribute to tolerance and are able to promote regulatory T cell differentiation. Naïve B cells can convert CD4(+)CD25(-) T cells into CD25(+)Foxp3(-) regulatory T cells, named Treg-of-B cells by our group...
November 18, 2017: Journal of Biomedical Science
https://www.readbyqxmd.com/read/29134510/drug-design-for-alk-positive-nsclc-an-integrated-pharmacophore-based-3d-qsar-and-virtual-screening-strategy
#7
Nivya James, V Shanthi, K Ramanathan
The increasing death rates related to anaplastic lymphoma kinase (ALK)-positive lung cancer culminated in a significant interest in the discovery of novel inhibitors for ALK. In the present research work, pharmacophore-based 3D QSAR modeling and virtual screening strategy have been carried out to address these issues. Initially, a five-point pharmacophore model was developed using the biological data of 50 compounds which includes an FDA-approved ALK inhibitor, crizotinib. Using the generated pharmacophore, a 3D QSAR model was developed and used as a query to screen the DrugBank database...
November 13, 2017: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/29076963/mechanical-and-metabolic-responses-to-traditional-and-cluster-set-configurations-in-the-bench-press-exercise
#8
Amador García-Ramos, Jorge M González-Hernández, Ezequiel Baños-Pelegrín, Adrián Castaño-Zambudio, Fernando Capelo-Ramírez, Daniel Boullosa, Guy G Haff, Pedro Jiménez-Reyes
García-Ramos, A, González-Hernández, JM, Baños-Pelegrín, E, Castaño-Zambudio, A, Capelo-Ramírez, F, Boullosa, D, Haff, GG, and Jiménez-Reyes, P. Mechanical and metabolic responses to traditional and cluster set configurations in the bench press exercise. J Strength Cond Res XX(X): 000-000, 2017-This study aimed to compare mechanical and metabolic responses between traditional (TR) and cluster (CL) set configurations in the bench press exercise. In a counterbalanced randomized order, 10 men were tested with the following protocols (sets × repetitions [inter-repetition rest]): TR1: 3 × 10 (0-second), TR2: 6 × 5 (0-second), CL5: 3 × 10 (5-second), CL10: 3 × 10 (10-second), and CL15: 3 × 10 (15-second)...
October 20, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29075269/galectin-1-impairs-the-generation-of-anti-parasitic-th1-cell-responses-in-the-liver-during-experimental-visceral-leishmaniasis
#9
Patrick T Bunn, Marcela Montes de Oca, Fabian de Labastida Rivera, Rajiv Kumar, Chelsea L Edwards, Rebecca J Faleiro, Susanna S Ng, Meru Sheel, Yulin Wang, Fiona H Amante, Ashraful Haque, Christian R Engwerda
Many infectious diseases are characterized by the development of immunoregulatory pathways that contribute to pathogen persistence and associated disease symptoms. In diseases caused by intracellular parasites, such as visceral leishmaniasis (VL), various immune modulators have the capacity to negatively impact protective CD4(+) T cell functions. Galectin-1 is widely expressed on immune cells and has previously been shown to suppress inflammatory responses and promote the development of CD4(+) T cells with immunoregulatory characteristics...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29066539/tcr-stimulated-changes-in-cell-surface-cd46-expression-generate-type-1-regulatory-t-cells
#10
Siobhan Ni Choileain, Joanne Hay, Joelle Thomas, Anna Williams, Matthieu M Vermeren, Cecile Benezech, Mario Gomez-Salazar, Owen R Hugues, Sonja Vermeren, Sarah E M Howie, Ian Dransfield, Anne L Astier
A lack of regulatory T cell function is a critical factor in the pathogenesis of autoimmune diseases, such as multiple sclerosis (MS). Ligation of the complement regulatory protein CD46 facilitates the differentiation of T helper 1 (TH1) effector cells into interleukin-10 (IL-10)-secreting type 1 regulatory T cells (Tr1 cells), and this pathway is defective in MS patients. Cleavage of the ectodomain of CD46, which contains three N-glycosylation sites and multiple O-glycosylation sites, enables CD46 to activate T cells...
October 24, 2017: Science Signaling
https://www.readbyqxmd.com/read/29063971/novel-microbial-sources-of-tropane-alkaloids-first-report-of-production-by-endophytic-fungi-isolated-from-datura-metel-l
#11
Tanushree Naik, Shanadrahalli Chandrashekaraiah Vanitha, Pradumn Kumar Rajvanshi, Manjegowda Chandrika, Subban Kamalraj, Chelliah Jayabaskaran
Eighteen endophytic fungi were isolated from various tissues of Datura metel and genes encoding for putrescine N-methyltransferase (PMT), tropinone reductase 1 (TR1) and hyoscyamine 6β-hydroxylase (H6H) were used as molecular markers for PCR-based screening approach for tropane alkaloids (TAs) producing endophytic fungi. These fungi were identified taxonomically by sequence analysis of the internal transcribed spacer region (ITS1-5.8S-ITS2) and also based on morphological characteristics of the fungal spore as Colletotrichum boninense, Phomopsis sp...
October 24, 2017: Current Microbiology
https://www.readbyqxmd.com/read/29040756/tcdd-ficz-and-other-high-affinity-ahr-ligands-dose-dependently-determine-the-fate-of-cd4-t-cell-differentiation
#12
Allison K Ehrlich, Jamie M Pennington, William H Bisson, Siva K Kolluri, Nancy I Kerkvliet
FICZ and TCDD, two high affinity AhR ligands, are reported to have opposite effects on T cell differentiation with TCDD inducing regulatory T cells and FICZ inducing Th17 cells. This dichotomy has been attributed to ligand-intrinsic differences in AhR activation, although differences in sensitivity to metabolism complicates the issue. TCDD is resistant to AhR-induced metabolism and produces sustained AhR activation following a single dose in the μg/kg range while FICZ is rapidly metabolized and AhR activation is transient...
October 13, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/29033934/ebi3-prevents-trypanosoma-cruzi-induced-myocarditis-by-dampening-ifn-%C3%AE-driven-inflammation
#13
Tiago Silva Medina, Gabriela Gonçalves Oliveira, Maria Cláudia Silva, Bruna Araújo David, Grace Kelly Silva, Denise Morais Fonseca, Renata Sesti-Costa, Amanda Farage Frade, Monique Andrade Baron, Barbara Ianni, Alexandre Costa Pereira, Christophe Chevillard, Edécio Cunha-Neto, José Antonio Marin-Neto, João Santana Silva
The identification of anti-inflammatory mediators can reveal important targetable molecules capable of counterbalancing Trypanosoma cruzi-induced myocarditis. Composed of Ebi3 and IL-27p28 subunits, IL-27 is produced by myeloid cells and is able to suppress inflammation by inducing IL-10-producing Tr1 cells, thus emerging as a potential candidate to ameliorate cardiac inflammation induced by T. cruzi. Although IL-27 has been extensively characterized as a suppressive cytokine that prevents liver immunopathogenesis after T...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29033913/biochemical-function-molecular-structure-and-evolution-of-an-atypical-thioredoxin-reductase-from-desulfovibrio-vulgaris
#14
Odile Valette, Tam T T Tran, Christine Cavazza, Elodie Caudeville, Gaël Brasseur, Alain Dolla, Emmanuel Talla, Laetitia Pieulle
Thioredoxin reductase (TR) regulates the intracellular redox environment by reducing thioredoxin (Trx). In anaerobes, recent findings indicate that the Trx redox network is implicated in the global redox regulation of metabolism but also actively participates in protecting cells against O2. In the anaerobe Desulfovibrio vulgaris Hildenborough (DvH), there is an intriguing redundancy of the Trx system which includes a classical system using NADPH as electron source, a non-canonical system using NADH and an isolated TR (DvTRi)...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29030870/the-competitive-nature-of-stat-complex-formation-drives-phenotype-switching-of-t-cells
#15
Ildar I Sadreev, Michael Z Q Chen, Yoshinori Umezawa, Vadim N Biktashev, Claudia Kemper, Diana V Salakhieva, Gavin I Welsh, Nikolay V Kotov
Signal transducers and activators of transcription (STATs) are key molecular determinants of T cell fate and effector function. Several inflammatory diseases are characterized by an altered balance of T cell phenotypes and cytokine secretion. STATs, therefore, represent viable therapeutic targets in numerous pathologies. However, the underlying mechanisms by which the same STAT proteins regulate both the development of different T cell phenotypes and their plasticity during changes in extracellular conditions remain unclear...
October 14, 2017: Immunology
https://www.readbyqxmd.com/read/28993775/il-27-induced-type-1-regulatory-t-cells-produce-oxysterols-that-constrain-il-10-production
#16
Solenne Vigne, Fanny Chalmin, Donovan Duc, Aurélie S Clottu, Lionel Apetoh, Jean-Marc A Lobaccaro, Isabelle Christen, Juan Zhang, Caroline Pot
The behaviors of lymphocytes, including CD4(+) T helper cells, are controlled on many levels by internal metabolic properties. Lipid metabolites have recently been ascribed a novel function as immune response modulators and perturbation of steroids pathways modulates inflammation and potentially promotes a variety of diseases. However, the impact of lipid metabolism on autoimmune disease development and lymphocyte biology is still largely unraveled. In this line, oxysterols, oxidized forms of cholesterol, have pleiotropic roles on the immune response aside from their involvements in lipid metabolism...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28982868/peripheral-tr1-and-foxp3-treg-as-markers-of-recurrent-malignancies-in-patients-with-hepato-biliary-pancreatic-cancers
#17
Tetsuya Ikemoto, Mitsuo Shimada, Daichi Ishikawa, Yoichiro Kawashita, Hiroki Teraoku, Masato Yoshikawa, Shinichiro Yamada, Y U Saito, Yuji Morine, Satoru Imura
BACKGROUND/AIM: Recently CD4(+)CD49b(+) LAG3(+)regulatory T (Tr1) cells are reported to be IL-10 driven, have strong regulatory activities. Thus, this study aimed to investigate whether Treg and Tr1 cells participate in immunological status against cancer. PATIENTS AND METHODS: Peripheral blood was withdrawn from patients (n=78), and healthy volunteers as controls (n=23). The peripheral blood mononuclear cells were subjected to FACScan analysis after labeling with anti-CD4, -CD25, - Foxp3, -CD49b and -LAG3 antibodies...
October 2017: Anticancer Research
https://www.readbyqxmd.com/read/28900492/identification-of-novel-epitopes-with-agonistic-activity-for-the-development-of-tumor-immunotherapy-targeting-trail-r1
#18
Lu Guo, Xin Sun, Zhichao Hao, Jingjing Huang, Xiaojian Han, Yajie You, Yaying Li, Meiying Shen, Tatsuhiko Ozawa, Hiroyuki Kishi, Atsushi Muraguchi, Aishun Jin
Tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) receptor-1/2 (TRAIL-R1/R2), also known as death receptors, are expressed in a wide variety of tumor cells. Although TRAIL can induce cell apoptosis by engaging its cognate TRAIL-R1/R2, some tumor cells are or become resistant to TRAIL treatment. Monoclonal antibodies (mAbs) against TRAIL-R1/R2 have been developed to use as potential antitumor therapeutic agents instead of TRAIL. However, TRAIL-R1/R2-based tumor therapy has not yet been realized...
2017: Journal of Cancer
https://www.readbyqxmd.com/read/28894001/intestinal-type-1-regulatory-t-cells-migrate-to-periphery-to-suppress-diabetogenic-t-cells-and-prevent-diabetes-development
#19
Hua Yu, Nicola Gagliani, Harumichi Ishigame, Samuel Huber, Shu Zhu, Enric Esplugues, Kevan C Herold, Li Wen, Richard A Flavell
Growing insight into the pathogenesis of autoimmune diseases and numerous studies in preclinical models highlights the potential of regulatory T cells to restore tolerance. By using non-obese diabetic (NOD) BDC2.5 TCR-transgenic (Tg), and IL-10 and Foxp3 double-reporter mice, we demonstrate that alteration of gut microbiota during cohousing experiments or treatment with anti-CD3 mAb significantly increase intestinal IL-10-producing type 1 regulatory T (Tr1) cells and decrease diabetes incidence. These intestinal antigen-specific Tr1 cells have the ability to migrate to the periphery via a variety of chemokine receptors such as CCR4, CCR5, and CCR7 and to suppress proliferation of Th1 cells in the pancreas...
September 26, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28869950/interleukin-10-gene-modified-dendritic-cell-induced-type-1-regulatory-t-cells-induce-transplant-tolerance-and-impede-graft-versus-host-disease-after-allogeneic-stem-cell-transplantation
#20
Jiangbo Wan, Fang Huang, Siguo Hao, Weiwei Hu, Chuanxu Liu, Wenhao Zhang, Xiaohui Deng, Linjun Chen, Liyuan Ma, Rong Tao
BACKGROUND/AIMS: Tr1 cells can induce peripheral tolerance to self- and foreign antigens, and have been developed as a therapeutic tool for the induction of tolerance to transplanted tissue. We explored the feasibility of generating Tr1 cells by using IL-10 gene-modified recipient DCs (DCLV-IL-10) to stimulate donor naive CD4+ T cells. We also investigated some biological properties of Tr1 cells. METHODS: DCLV-IL-10 were generated through DCs transduced with a lentivirus vector carrying the IL-10 gene, and Tr1 cells were produced by using DCLV-IL-10 to stimulate naive CD4+ T cells...
2017: Cellular Physiology and Biochemistry
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