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https://www.readbyqxmd.com/read/29222090/gpr55-regulates-intraepithelial-lymphocyte-migration-dynamics-and-susceptibility-to-intestinal-damage
#1
Hayakazu Sumida, Erick Lu, Hsin Chen, Qiyun Yang, Ken Mackie, Jason G Cyster
Intraepithelial lymphocytes (IELs) of the small intestine are intimately associated with the epithelial cells. Yet, the factors controlling their migration and interaction dynamics are poorly understood. We demonstrate that GPR55, a receptor that mediates migration inhibition in response to lysophosphatidylinositol (LPI), negatively regulates T cell receptor γδ (TCRγδ) IEL accumulation in the small intestine. Intravital imaging studies show that GPR55-deficient IELs migrate faster and interact more extensively with epithelial cells...
December 8, 2017: Science Immunology
https://www.readbyqxmd.com/read/29202478/%C3%AE-%C3%AE-tcr-recruits-the-syk-pi3k-axis-to-drive-proinflammatory-differentiation-program
#2
Ryunosuke Muro, Takeshi Nitta, Kenta Nakano, Tadashi Okamura, Hiroshi Takayanagi, Harumi Suzuki
γδT cells produce inflammatory cytokines and have been implicated in the pathogenesis of cancer, infectious diseases, and autoimmunity. The T cell receptor (TCR) signal transduction that specifically regulates the development of IL-17-producing γδT (γδT17) cells largely remains unclear. Here, we showed that the receptor proximal tyrosine kinase Syk is essential for γδTCR signal transduction and development of γδT17 in the mouse thymus. Zap70, another tyrosine kinase essential for the development of αβT cells, failed to functionally substitute for Syk in the development of γδT17...
December 4, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/29199946/stimulation-of-hair-follicle-stem-cell-proliferation-through-an-il-1-dependent-activation-of-%C3%AE-%C3%AE-t-cells
#3
Pedro Lee, Rupali Gund, Abhik Dutta, Neha Pincha, Isha Rana, Subhasri Ghosh, Deborah Witherden, Eve Kandyba, Amanda MacLeod, Krzysztof Kobielak, Wendy L Havran, Colin Jamora
The cutaneous wound-healing program is a product of a complex interplay among diverse cell types within the skin. One fundamental process that is mediated by these reciprocal interactions is the mobilization of local stem cell pools to promote tissue regeneration and repair. Using the ablation of epidermal caspase-8 as a model of wound healing in Mus musculus, we analyzed the signaling components responsible for epithelial stem cell proliferation. We found that IL-1α and IL-7 secreted from keratinocytes work in tandem to expand the activated population of resident epidermal γδT-cells...
December 4, 2017: ELife
https://www.readbyqxmd.com/read/29180322/-peripheral-blood-t-cell-tnf-%C3%AE-and-ifn-%C3%AE-production-stimulated-by-low-molecular-peptide-of-mycobacterium-tuberculosis-heat-resistant-antigen-for-differential-diagnosis-between-pulmonary-tuberculosis-and-latent-tuberculosis-infection
#4
Jie Tang, Ce Chen, Cheng Zha, Jian-Rong Chang, Qiang Fang, Zhao-Hua Wang, Bai-Qing Li
OBJECTIVE: To investigate the effects of low molecular peptide of Mycobacterium tuberculosis heat-resistant antigen (Mtb-HAg-10k) on the production of tumor necrosis factor-α (TNF-α) and interferon-γ (IFN-γ) in peripheral blood T cells and test the feasibility of differential diagnosis between pulmonary tuberculosis (PTB) and latent tuberculosis infection (LTBI) by assessing the number of Mtb-HAg-10k-stimulated IFN-γ-producing T cells. METHODS: Peripheral blood mononuclear cells (PBMCs) were separated from the peripheral blood of 10 healthy adults, 6 individuals with LTBI and 13 patients with PTB...
November 20, 2017: Nan Fang Yi Ke da Xue Xue Bao, Journal of Southern Medical University
https://www.readbyqxmd.com/read/29164800/the-generation-of-human-%C3%AE-%C3%AE-t-cell-derived-induced-pluripotent-stem-cells-from-whole-peripheral-blood-mononuclear-cell-culture
#5
Daisuke Watanabe, Michiyo Koyanagi-Aoi, Mariko Taniguchi-Ikeda, Yukiko Yoshida, Takeshi Azuma, Takashi Aoi
γδT cells constitute a small proportion of lymphocytes in peripheral blood. Unlike αβT cells, the anti-tumor activities are exerted through several different pathways in a MHC-unrestricted manner. Thus, immunotherapy using γδT cells is considered to be effective for various types of cancer. Occasionally, however, ex vivo expanded cells are not as effective as expected due to cell exhaustion. To overcome the issue of T-cell exhaustion, researchers have generated induced pluripotent stem cells (iPSCs) that harbor the same T-cell receptor (TCR) genes as their original T-cells, which provide nearly limitless sources for antigen-specific cytotoxic T lymphocytes (CTLs)...
November 21, 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/29155882/pharmacological-inhibition-of-ror%C3%AE-t-suppresses-the-th17-pathway-and-alleviates-arthritis-in-vivo
#6
Ulf Guendisch, Jessica Weiss, Florence Ecoeur, Julia Christina Riker, Klemens Kaupmann, Joerg Kallen, Samuel Hintermann, David Orain, Janet Dawson, Andreas Billich, Christine Guntermann
Retinoic acid receptor-related-orphan-receptor-C (RORγt) is the key transcription factor that is driving the differentiation of IL-17 producing T-helper 17 (Th17) cells that are implicated in the pathology of various autoimmune and inflammatory diseases. Based on the importance of RORγt in promoting Th17-driven pathology, there is considerable interest to develop low-molecular-weight compounds with the aim of inhibiting the transcriptional activity of this nuclear hormone receptor. In this article, we describe the in vitro and in vivo pharmacology of a potent and selective small-molecular-weight RORγt inverse agonist...
2017: PloS One
https://www.readbyqxmd.com/read/29150425/amino-bisphosphonates-%C3%AE-%C3%AE-t-cells-and-their-roles-in-rheumatoid-arthritis
#7
Wen-Xiu Mo, Shan-Shan Yin, Hua Chen, Xuan Zhang
No abstract text is available yet for this article.
November 17, 2017: Annals of the Rheumatic Diseases
https://www.readbyqxmd.com/read/29147601/tumor-infiltrating-%C3%AE-%C3%AE-t-cells-predict-prognosis-and-adjuvant-chemotherapeutic-benefit-in-patients-with-gastric-cancer
#8
Jieti Wang, Chao Lin, He Li, Ruochen Li, Yifan Wu, Hao Liu, Heng Zhang, Hongyong He, Weijuan Zhang, Jiejie Xu
Purpose : Tumor-infiltrating γδT cells (γδTILs) have different prognostic value and functions among various cancers. The aim of the present study was to evaluate the effect of γδTILs in gastric cancer. Patients and methods : A discovery set (n = 190) and a validation set (n = 273) were involved in this study. Patients with TNM II and III disease were used to predict response to 5-fluorouracil (5-FU)-based adjuvant chemotherapy (ACT) in both sets. γδTILs were defined as intense (γδT cells≥ 5/HPF) versus nonintense (γδT cells<5/HPF)...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/29123966/pd-1-blockade-at-the-time-of-tumor-escape-potentiates-the-immune-mediated-antitumor-effects-of-a-melanoma-targeting-monoclonal-antibody
#9
Laetitia They, Henri-Alexandre Michaud, Ondine Becquart, Virginie Lafont, Bernard Guillot, Florence Boissière-Michot, Marta Jarlier, Caroline Mollevi, Jean-François Eliaou, Nathalie Bonnefoy, Laurent Gros
Tumor antigen-targeting monoclonal antibodies (TA-targeting mAbs) are used as therapeutics in many malignancies and their capacity to mobilize the host immunity puts them at the forefront of anti-cancer immunotherapies. Both innate and adaptive immune cells have been associated with the therapeutic activity of such antibodies, but tumor escape from mAb-induced tumor immune surveillance remains one of the main clinical issues. In this preclinical study, we grafted immunocompetent and immunocompromised mice with the B16F10 mouse melanoma cell line and treated them with the TA99 TA-targeting mAb to analyze the immune mechanisms associated with the tumor response and resistance to TA99 monotherapy...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/29119640/il-23-actived-%C3%AE-%C3%AE-t-cells-affect-th17-cells-and-regulatory-t-cells-by-secreting-il-21-in-children-with-primary-nephrotic-syndrome
#10
Li Zhang, Junli Yan, Baohui Yang, Gaofu Zhang, Mo Wang, Shifang Dong, Wei Liu, Haiping Yang, Qiu Li
OBJECTIVE: This study (1) analyzed the percentage of γδ T cells, γδ T cell subsets, Th17 cells, and regulatory T cells (Treg cells), and (2) determined the role of IL-23 in primary nephrotic syndrome (PNS) patients with active disease and in remission. MATERIALS AND METHODS: Eighty-four PNS patients and 51 healthy age-matched controls were included in this study. The percentage of γδ T cells, γδ T cell subsets, Th17 cells, and Treg cells in peripheral blood mononuclear cells (PBMCs) were analyzed by fluorescence-activated cell sorting...
November 9, 2017: Scandinavian Journal of Immunology
https://www.readbyqxmd.com/read/29113227/low-dose-valproic-acid-with-low-dose-gemcitabine-augments-mhc-class-i-related-chain-a-b-expression-without-inducing-the-release-of-soluble-mhc-class-i-related-chain-a-b
#11
Tomoharu Miyashita, Kenji Miki, Takashi Kamigaki, Isamu Makino, Hidehiro Tajima, Shinichi Nakanuma, Hironori Hayashi, Hiroyuki Takamura, Sachio Fushida, Ali K Ahmed, John W Harmon, Tetsuo Ohta
To improve natural killer group 2 member D (NKG2D)-dependent cytotoxicity, the inhibition of cleavage and release of major histocompatibility complex class 1-related chain (MIC) molecules from the tumor surface are required. Valproic acid (VPA), a histone deacetylase (HDAC) inhibitor, is able to induce cell-surface MICA/B on tumor cells. In the present study, the ability of VPA and gemcitabine (GEM) to upregulate MICA/B in pancreatic cancer cells was investigated, resulting in the inhibition of cleavage and release of MIC molecules from the tumor surface...
November 2017: Oncology Letters
https://www.readbyqxmd.com/read/29104081/wnt-pathway-activator-tws119-enhances-the-proliferation-and-cytolytic-activity-of-human-%C3%AE-%C3%AE-t-cells-against-colon-cancer
#12
Yong-Qiang Chen, Lu Zheng, Mohanad Aldarouish, Zhong-Hai Zhou, Ning Pan, Jun-Quan Liu, Fu-Xing Chen, Li-Xin Wang
γδT cells are a distinct T-cell subset that display unique characteristics regarding T-cell receptor gene usage, tissue tropism and antigen recognition. Adoptive γδT cell transfer therapy has recently been gaining importance as an efficient approach in cancer immunotherapy. However, exploiting γδT cell response for tumour immunotherapy is a challenge due to cell numbers, activities and differentiation states that minimize the clinical therapeutic effects. Previous studies have indicated that the wnt/β-catenin signalling pathway plays a crucial role in the differentiation, survival and enhancement of the immune response of T lymphocytes...
November 2, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/29091327/unconventional-t-cells-in-chronic-hepatitis-b-patients-on-long-term-suppressive-therapy-with-tenofovir-followed-by-a-peg-ifn-add-on-strategy-a-randomized-study
#13
Elvira Stefania Cannizzo, Camilla Tincati, Francesca Binda, Paola Ronzi, Federico Angelo Cazzaniga, Spinello Antinori, Antonella d'Arminio Monforte, Giulia Marchetti, Laura Milazzo
HBV eradication in Chronic Hepatitis B (CHB) subjects is rarely achieved with either nucleos(t)ide analogues (NA) or pegylated interferon (Peg-IFN), which both have a limited effect in restoring immune responses. 30 CHB subjects on long-term treatment with tenofovir (TDF) and HBV suppression were enrolled and randomized 1:2 to either receive Peg-IFN-α-2a add-on therapy or continue TDF alone. We studied γδT and iNKT frequency and function (by flow cytometry) at baseline, at 12 weeks and 12 weeks after the end of treatment...
November 1, 2017: Journal of Viral Hepatitis
https://www.readbyqxmd.com/read/29070614/type-i-ifn-receptor-signalling-controls-il-7-dependent-accumulation-and-activity-of-protumoral-il-17a-producing-%C3%AE-%C3%AE-t-cells-in-breast-cancer
#14
Emmanuel C Patin, Daphnée Soulard, Sébastien Fleury, Maya Hassane, David Dombrowicz, Christelle Faveeuw, François Trottein, Christophe Paget
The protumoral activity of γδT17 cells has recently emerged in a wide variety of solid malignancies including breast cancer. These cells promote tumor growth, angiogenesis, and subsequent metastasis development. However, the factors that regulate the biology of γδT17 cells within the tumor microenvironment are poorly understood. Here we use two experimental models of breast cancer to reinforce the concept that tumor-infiltrating γδT17 cells are endowed with protumoral functions that promote tumor progression and metastasis development...
October 25, 2017: Cancer Research
https://www.readbyqxmd.com/read/29052125/differences-in-innate-ifn%C3%AE-and-il-17-responses-to-bordetella-pertussis-between-balb-c-and-c57bl-6-mice-role-of-%C3%AE-%C3%AE-t-cells-nk-cells-and-dendritic-cells
#15
Yung-Yi C Mosley, Fangjia Lu, Harm HogenEsch
Cell-mediated immune responses characterized by the secretion of IFNγ and IL-17 play an important role in the immune response to Bordetella pertussis (B. pertussis). We investigated innate sources of IFNγ and IL-17 upon stimulation of spleen cells from BALB/c (B/c) and C57BL/6 (B6) mice with heat-killed B. pertussis (hkBp). Spleen cells from B/c mice secreted less IFNγ and more IL-17 than those from B6 mice. Innate IFNγ was produced predominantly by NK cells in B/c mice and by CD8 T cells and NK cells in B6 mice...
October 19, 2017: Immunologic Research
https://www.readbyqxmd.com/read/28944217/activation-of-inkt-cells-prevents-salmonella-enterocolitis-and-salmonella-induced-reactive-arthritis-by-downregulating-il-17-producing-%C3%AE-%C3%AE-t-cells
#16
Mariángeles Noto Llana, Sebastián H Sarnacki, Andrea L Morales, María Del R Aya Castañeda, Mónica N Giacomodonato, Guillermo Blanco, María C Cerquetti
Reactive arthritis (ReA) is an inflammatory condition of the joints that arises following an infection. Salmonella enterocolitis is one of the most common infections leading to ReA. Although the pathogenesis remains unclear, it is known that IL-17 plays a pivotal role in the development of ReA. IL-17-producers cells are mainly Th17, iNKT, and γδT lymphocytes. It is known that iNKT cells regulate the development of Th17 lineage. Whether iNKT cells also regulate γδT lymphocytes differentiation is unknown...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28912779/v%C3%AE-4-%C3%AE-%C3%AE-t-cells-aggravate-severe-h1n1-influenza-virus-infection-induced-acute-pulmonary-immunopathological-injury-via-secreting-interleukin-17a
#17
Chunxue Xue, Mingjie Wen, Linlin Bao, Hui Li, Fengdi Li, Meng Liu, Qi Lv, Yunqing An, Xulong Zhang, Bin Cao
The influenza A (H1N1) pdm09 virus remains a critical global health concern and causes high levels of morbidity and mortality. Severe acute lung injury (ALI) and acute respiratory distress syndrome (ARDS) are the major outcomes among severely infected patients. Our previous study found that interleukin (IL)-17A production by humans or mice infected with influenza A (H1N1) pdm09 substantially contributes to ALI and subsequent morbidity and mortality. However, the cell types responsible for IL-17A production during the early stage of severe influenza A (H1N1) pdm09 infection remained unknown...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28845043/human-regulatory-%C3%AE-%C3%AE-t-cells-and-their-functional-plasticity-in-the-tumor-microenvironment
#18
Hui Chen, Wei He
No abstract text is available yet for this article.
August 28, 2017: Cellular & Molecular Immunology
https://www.readbyqxmd.com/read/28835458/il-2-shapes-the-survival-and-plasticity-of-il-17-producing-%C3%AE-%C3%AE-t-cells
#19
Theresa M Corpuz, Rodrigo Vazquez-Lombardi, Jason K Luong, Joanna Warren, Jessica Stolp, Daniel Christ, Cecile King, Robert Brink, Jonathan Sprent, Kylie E Webster
IL-17-producing γδ T (γδT-17) cells have proved to be an important early source of IL-17 in many inflammatory settings and are emerging as an important participant in protumor immune responses. Considering that their peripheral activation depends largely on innate signals rather than TCR ligation, it is important to understand what mechanisms exist to curb unwanted activation. Expression of the high-affinity IL-2R on γδT-17 cells prompted us to investigate a role for this cytokine. We found γδT-17 cells to be enriched, not depleted, in IL-2-deficient mice...
October 1, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28798316/the-proton-sensing-g-protein-coupled-receptor-t-cell-death-associated-gene-8-tdag8-shows-cardioprotective-effects-against-myocardial-infarction
#20
Akiomi Nagasaka, Chihiro Mogi, Hiroki Ono, Toshihide Nishi, Yuma Horii, Yuki Ohba, Koichi Sato, Michio Nakaya, Fumikazu Okajima, Hitoshi Kurose
Myocardial infarction (MI) is an ischaemic heart condition caused by the occlusion of coronary arteries. Following MI, lactic acid from anaerobic glycolysis increases and infiltrating immune cells produce severe inflammation, which leads to acidosis in the ischaemic heart. However, the physiological implication of this pH reduction remains largely unknown. T-cell death-associated gene 8 (TDAG8) is a proton-sensing G protein-coupled receptor found on cardiac macrophages that recognise increases in extracellular protons...
August 10, 2017: Scientific Reports
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