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https://www.readbyqxmd.com/read/29344269/early-and-partial-reduction-in-cd4-foxp3-regulatory-t-cells-during-colitis-associated-colon-cancer-induces-cd4-and-cd8-t-cell-activation-inhibiting-tumorigenesis
#1
Jonadab E Olguín, Itzel Medina-Andrade, Emmanuel Molina, Armando Vázquez, Thalia Pacheco-Fernández, Rafael Saavedra, Carlos Pérez-Plasencia, Yolanda I Chirino, Felipe Vaca-Paniagua, Luis E Arias-Romero, Emma B Gutierrez-Cirlos, Sonia A León-Cabrera, Miriam Rodriguez-Sosa, Luis I Terrazas
Colorectal cancer (CRC) is the second most commonly diagnosed cancer in women and the third in men in North America and Europe. CRC is associated with inflammatory responses in which intestinal pathology is caused by different cell populations including a T cell dysregulation that concludes in an imbalance between activated T (Tact) and regulatory T (Treg) cells. Treg cells are CD4+Foxp3+ cells that actively suppress pathological and physiological immune responses, contributing to the maintenance of immune homeostasis...
2018: Journal of Cancer
https://www.readbyqxmd.com/read/29330114/human-cd4-cd25-cd127hi-cells-and-the-th1-th2-phenotype
#2
Aditi Narsale, Rosita Moya, Joanna Davida Davies
CD4+ T cells that co-express CD25 and CD127 (CD25+CD127+) make up around 20% of all circulating CD4+ memory T cells in healthy people. The clinical significance of these cells is that in children with type 1 diabetes their relative frequency at diagnosis is significantly and directly correlated with rate of disease progression. The purpose of this study was to further characterize the CD25+CD127hi cells. We show that they are a mix of Th1 and Th2 cells however, they have a significantly higher relative frequency of pre-committed and committed Th2 cells, and secrete significantly higher levels of Th2-type cytokines than CD25- memory T cells...
January 9, 2018: Clinical Immunology: the Official Journal of the Clinical Immunology Society
https://www.readbyqxmd.com/read/29298833/production-of-il-17-by-mait-cells-is-increased-in-multiple-sclerosis-and-is-associated-with-il-7-receptor-expression
#3
Anne Willing, Jan Jäger, Stefanie Reinhardt, Nina Kursawe, Manuel A Friese
Multiple sclerosis (MS) is a T cell-driven inflammatory disease of the CNS. Research on T cell subsets involved in MS pathogenesis has mainly focused on classical CD4+ T cells, especially Th17 cells, as they produce the proinflammatory, MS-associated cytokine IL-17. However, the abundant unconventional mucosal-associated invariant T (MAIT) cells are also able to produce IL-17. MAIT cells are characterized by high CD161 expression and a semi-invariant Vα7.2 TCR, with which they recognize bacterial and yeast Ags derived from the riboflavin (vitamin B2) metabolism...
January 3, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29275010/interleukin-7-augments-cd8-t-cells-function-and-promotes-viral-clearance-in-chronic-hepatitis-c-virus-infection
#4
Huanrong Hou, Yi Kang, Yanli Zeng, Yukui Li, Jia Shang
Interleukin (IL)-7 is a potent proliferation, activation, and survival cytokine for CD8+ T cells to improve viral and tumor specific CD8+ T cell responses. However, the role of IL-7 in regulation of dysfunctional hepatitis C virus (HCV)-specific CD8+ T cells was not fully elucidated. Thus, a total of 53 patients with chronic hepatitis C and 24 healthy individuals were enrolled in the current study. Serum IL-7 and its receptor α chain CD127 expression was measured. The modulatory function of IL-7 to CD8+ T cells was investigated in both direct and indirect contact co-culture with HCVcc-infected Huh7...
December 21, 2017: Cytokine
https://www.readbyqxmd.com/read/29261670/human-intrahepatic-ilc2-are-il-13positive-amphiregulinpositive-and-their-frequency-correlates-with-model-of-end-stage-liver-disease-score
#5
Hannah C Jeffery, Patrick McDowell, Philipp Lutz, Rebecca E Wawman, Sheree Roberts, Chris Bagnall, Jane Birtwistle, David H Adams, Ye Htun Oo
INTRODUCTION: Innate lymphoid cells (ILC) have been implicated in the initiation of inflammation and fibrosis in mice. However, ILC have not been characterized in inflamed human liver tissue. METHODS: Human intrahepatic lymphocytes were isolated by mechanical digestion and phenotyped by flow cytometry. Conditioned medium from cultures of primary human biliary epithelial cells, stellate cells, fibroblasts and inflamed human liver tissue was used to model the effects of the inflammatory liver environment of ILC phenotype and function...
2017: PloS One
https://www.readbyqxmd.com/read/29250067/group-2-innate-lymphoid-cells-exhibit-a-dynamic-phenotype-in-allergic-airway-inflammation
#6
Bobby W S Li, Ralph Stadhouders, Marjolein J W de Bruijn, Melanie Lukkes, Dior M J M Beerens, Maarten D Brem, Alex KleinJan, Ingrid Bergen, Heleen Vroman, Mirjam Kool, Wilfred F J van IJcken, Tata Nageswara Rao, Hans Jörg Fehling, Rudi W Hendriks
Group 2 innate lymphoid cells (ILC2) are implicated in allergic asthma as an early innate source of the type 2 cytokines IL-5 and IL-13. However, their induction in house dust mite (HDM)-mediated airway inflammation additionally requires T cell activation. It is currently unknown whether phenotypic differences exist between ILC2s that are activated in a T cell-dependent or T cell-independent fashion. Here, we compared ILC2s in IL-33- and HDM-driven airway inflammation. Using flow cytometry, we found that surface expression levels of various markers frequently used to identify ILC2s were dependent on their mode of activation, highly variable over time, and differed between tissue compartments, including bronchoalveolar lavage (BAL) fluid, lung, draining lymph nodes, and spleen...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29244714/identification-of-novel-human-nk-cell-progenitor-subsets
#7
Priyanka Sathe, Swee Heng Milon Pang, Rebecca Delconte, Ngaire Elwood, Nicholas D Huntington
Understanding the pathways and regulation of human haematopoiesis, in particular, lymphopoiesis, is vital to manipulation of these processes for therapeutic purposes. However, although haematopoiesis has been extensively characterised in mice, translation of these findings to human biology remains rudimentary. Here, we describe the isolation of three progenitor subsets from human foetal bone marrow that represent differential stages of commitment to the natural killer (NK) cell lineage based on IL-15 responsiveness...
December 15, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29207606/combination-therapy-with-an-ox40l-fusion-protein-and-a-vaccine-targeting-the-transcription-factor-twist-inhibits-metastasis-in-a-murine-model-of-breast-cancer
#8
Anthony S Malamas, Scott A Hammond, Jeffrey Schlom, James W Hodge
OX40 is a costimulatory receptor that potentiates proliferation, survival, memory formation, and effector function of CD4+ and CD8+ T-cells, while overcoming the suppressive activity of regulatory T-cells (Tregs). Here, we explored the combination of an OX40L fusion protein (OX40L-FP) with a poxvirus-based cancer vaccine (MVA-Twist-TRICOM) to inhibit tumor metastasis in the 4T1 murine breast cancer model. Contrary to the single agent treatments, the combination therapy significantly decreased the number of metastatic colonies per lung and prolonged survival...
October 31, 2017: Oncotarget
https://www.readbyqxmd.com/read/29207601/dissecting-the-mechanisms-involved-in-anti-human-t-lymphocyte-immunoglobulin-atg-induced-tolerance-in-the-setting-of-allogeneic-stem-cell-transplantation-potential-implications-for-graft-versus-host-disease
#9
Katia Beider, David Naor, Valeria Voevoda, Olga Ostrovsky, Hanna Bitner, Evgenia Rosenberg, Nira Varda-Bloom, Victoria Marcu-Malina, Jonathan Canaani, Ivetta Danilesko, Avichai Shimoni, Arnon Nagler
Polyclonal anti-human thymocyte globulins (ATG) have been recently shown to significantly reduce the incidence of graft versus host disease (GVHD) post allogeneic stem cell transplantation (HSCT) from both sibling and unrelated donors. Induction of regulatory T cells has been suggested as one of the possible mechanisms. The aim of current study was to further characterize the T cell populations induced by ATG treatment and to delineate the mechanisms involved in ATG-induced tolerance. Phenotypic characterization revealed a significant increase in the expression of FoxP3, GITR, CD95, PD-1 and ICOS as well as the complement inhibitory molecules CD55, CD58 and CD59 on CD4+CD25+ T cells upon ATG treatment...
October 31, 2017: Oncotarget
https://www.readbyqxmd.com/read/29197674/risk-factors-for-severe-acute-graft-versus-host-disease-in-donor-graft-composition
#10
Arwen Stikvoort, Ahmed Gaballa, Martin Solders, Iris Nederlof, Björn Önfelt, Berit Sundberg, Mats Remberger, Mikael Sundin, Jonas Mattsson, Michael Uhlin
Acute graft-versus-host disease (aGVHD) is one of the main major complications of post hematopoietic stem cell transplantation (HSCT). Identifying patients at risk of severe aGVHD may lead to earlier intervention and treatment, resulting in increased survival and a better quality of life. We aimed to identify biomarkers in donor grafts and patient plasma around the time of transplantation which might be predictive of aGVHD development. We build upon our previously published methods by using multiplex assays and multi-colour flow cytometry...
November 29, 2017: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/29182416/ex-vivo-stimulation-of-lymphocytes-with-il-10-mimics-sepsis-induced-intrinsic-t-cell-alterations
#11
Fanny Poujol, Guillaume Monneret, Emmanuelle Gallet-Gorius, Alexandre Pachot, Julien Textoris, Fabienne Venet
Profound T-cell alterations are observed in septic patients in association with increased risk of secondary infection and mortality. The pathophysiological mechanisms leading to such dysfunctions are not completely understood and direct and indirect mechanisms have been described. In this study we evaluated whether ex vivo stimulation of lymphocytes with IL-10, an immunosuppressive cytokine released at the systemic level during sepsis, could mimic sepsis-induced intrinsic T-cell alterations. We showed that recombinant human IL-10 priming of T cells altered their proliferative response to anti-CD2/CD3/CD28 antibody-coated beads and PHA stimulations, in a dose-dependent manner independently of accessory cells...
November 28, 2017: Immunological Investigations
https://www.readbyqxmd.com/read/29166179/imbalance-between-subpopulations-of-regulatory-t-cells-in-patients-with-acute-exacerbation-of-copd
#12
Xia Yang, Bo Huo, Xiaoning Zhong, Wenyan Su, Wenting Liu, Yumei Li, Zhiyi He, Jing Bai
Human regulatory T cells (Tregs) have been reported to be not significantly different in the peripheral blood of patients with chronic obstructive pulmonary disease (COPD) and healthy controls. Recent research has identified some new markers for Tregs and indicated that Tregs are composed of distinct subpopulations. The aim of the study was to describe the changing patterns of circulating Treg subpopulations in patients with acute exacerbation of COPD (AECOPD) and healthy controls, and to explore their potential roles in AECOPD pathogenesis...
November 22, 2017: COPD
https://www.readbyqxmd.com/read/29164490/immunotherapy-with-interferon-%C3%AE-induced-dendritic-cells-for-chronic-hcv-infection-the-results-of-pilot-clinical-trial
#13
Elena Chernykh, Olga Leplina, Ekaterina Oleynik, Marina Tikhonova, Tamara Tyrinova, Natalia Starostina, Alexandr Ostanin
The key role of T cells in hepatitis C virus (HCV) elimination and the ability of dendritic cells (DCs) to induce antiviral T cell responses suggest that DC vaccines could be a promising approach in the treatment of chronic HCV infection. The aim of our study was to evaluate, whether immunotherapy with DCs is safe and elicits anti-HCV T cell responses. Ten patients with HCV (genotype 1) were vaccinated with monocyte-derived DCs, generated in the presence of IFN-α (IFN-DCs) and pulsed with recombinant HCV Core and NS3 proteins...
November 21, 2017: Immunologic Research
https://www.readbyqxmd.com/read/29161617/early-pregnancy-immune-biomarkers-in-peripheral-blood-may-predict-preeclampsia
#14
M D Salazar Garcia, Y Mobley, J Henson, M Davies, A Skariah, S Dambaeva, A Gilman-Sachs, K Beaman, C Lampley, J Kwak-Kim
We performed a prospective cohort study in 197 pregnant women. Peripheral blood was collected between 5 and 16 weeks of gestation. Intracellular cytokine analysis and immunophenotype were performed by flow-cytometry. Serum levels of cytokines and chemokines were analyzed by multiplex assay. 86 patients were eligible for the analysis and 10.5% (n=9) developed preeclampsia. Patients with preeclampsia had significantly higher percentage of CD3+CD4+TNFα+ T helper (Th) 1 cells (45.4±10.3 vs 37.1±8.5, P=0.032) and CD3+CD4+IL17+ Th 17 cells (2...
November 2, 2017: Journal of Reproductive Immunology
https://www.readbyqxmd.com/read/29128554/immunomodulatory-effects-of-tyrosine-kinase-inhibitor-in-vitro-and-in-vivo-study
#15
Elena Marinelli Busilacchi, Andrea Costantini, Nadia Viola, Benedetta Costantini, Jacopo Olivieri, Luca Butini, Giorgia Mancini, Ilaria Scortechini, Martina Chiarucci, Monica Poiani, Antonella Poloni, Pietro Leoni, Attilio Olivieri
Pathogenesis of chronic graft-versus-host disease (cGVHD) is incompletely defined, involving donor-derived CD4 and CD8-positive T lymphocytes as well as B cells. Standard treatment is lacking for steroid-dependent/refractory cases; therefore, the potential usefulness of tyrosine kinase inhibitors (TKIs) has been suggested, based on their potent antifibrotic effect. However, TKIs seem to have pleiotropic activity. We sought to evaluate the in vitro and in vivo impact of different TKIs on lymphocyte phenotype and function...
November 8, 2017: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/29103633/cd8-cd28-cd127locd39-regulatory-t-cell-expansion-a%C3%A2-new-possible-pathogenic-mechanism-for-hiv-infection
#16
Daniela Fenoglio, Chiara Dentone, Alessio Signori, Antonio Di Biagio, Alessia Parodi, Francesca Kalli, Giorgia Nasi, Monica Curto, Giovanni Cenderello, Pasqualina De Leo, Valentina Bartolacci, Giancarlo Orofino, Laura Ambra Nicolini, Lucia Taramasso, Edoardo Fiorillo, Valeria Orrù, Paolo Traverso, Bianca Bruzzone, Federico Ivaldi, Eugenio Mantia, Michele Guerra, Simone Negrini, Mauro Giacomini, Sanjay Bhagani, Gilberto Filaci
BACKGROUND: HIV-associated immunodeficiency is related to loss of CD4+ T cells. This mechanism does not explain certain manifestations of HIV disease, such as immunodeficiency events in patients with greater than 500 CD4+ T cells/μL. CD8+CD28-CD127loCD39+ T cells are regulatory T (Treg) lymphocytes that are highly concentrated within the tumor microenvironment and never analyzed in the circulation of HIV-infected patients. OBJECTIVES: We sought to analyze the frequency of CD8+CD28-CD127loCD39+ Treg cells in the circulation of HIV-infected patients...
October 28, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29093987/targeting-the-epitope-spreader-pep19-by-na%C3%A3-ve-human-cd45ra-regulatory-t-cells-dictates-a-distinct-suppressive-t-cell-fate-in-a-novel-form-of-immunotherapy
#17
Hyun-Joo Kim, Gil Sun Cha, Ji-Young Joo, Juyoun Lee, Sung-Jo Kim, Jeongae Lee, So Youn Park, Jeomil Choi
Purpose: Beyond the limited scope of non-specific polyclonal regulatory T cell (Treg)-based immunotherapy, which depends largely on serendipity, the present study explored a target Treg subset appropriate for the delivery of a novel epitope spreader Pep19 antigen as part of a sophisticated form of immunotherapy with defined antigen specificity that induces immune tolerance. Methods: Human polyclonal CD4(+)CD25(+)CD127(lo-) Tregs (127-Tregs) and naïve CD4(+)CD25(+)CD45RA(+) Tregs (45RA-Tregs) were isolated and were stimulated with target peptide 19 (Pep19)-pulsed dendritic cells in a tolerogenic milieu followed by ex vivo expansion...
October 2017: Journal of Periodontal & Implant Science
https://www.readbyqxmd.com/read/29093082/according-to-hcv-infection-stage-il-7-plus-4-1bb-triggering-alone-or-combined-with-pd-1-blockade-increases-traf1-low-hcv-specific-cd8-cell-reactivity
#18
Elia Moreno-Cubero, Dolores Subirá, Eduardo Sanz-de-Villalobos, Trinidad Parra-Cid, Antonio Madejón, Joaquín Miquel, Antonio Olveira, Alejandro González-Praetorius, Javier García-Samaniego, Juan-Ramón Larrubia
Hepatitis C virus (HCV)-specific CD8(+) T cells suffer a progressive exhaustion during persistent HCV infection (PI). This process could involve the positive immune checkpoint 4-1BB/4-1BBL, through the loss of its signal transducer TRAF1. To address this issue, peripheral HCV-specific CD8(+) T cells (Pentamer(+)/CD8(+)) from patients with PI and resolved infection after treatment (RI) were studied. Duration of HCV infection and liver fibrosis progression rate inversely correlated with the likelihood of detecting peripheral pentamer(+)/CD8(+) cells...
November 1, 2017: Journal of Virology
https://www.readbyqxmd.com/read/29075318/t-and-nk-cell-populations-with-regulatory-phenotype-and-markers-of-apoptosis-in-circulating-lymphocytes-of-patients-with-cin3-or-microcarcinoma-of-the-cervix-evidence-for-potential-mechanisms-of-immune-suppression
#19
Olga V Kurmyshkina, Pavel I Kovchur, Ludmila V Schegoleva, Tatyana O Volkova
BACKGROUND: Processes and mechanisms responsible for systemic immune suppression in early-stage cervical cancer remain substantially underinvestigated. In this work, we focused on studying the frequencies of circulating regulatory T (CD4 and CD8 Tregs) and NK (NKregs) cells in parallel with assessment of apoptotic markers expression in T cells from patients with preinvasive and microinvasive cervical cancer, with the aim to determine whether up-regulation of apoptosis-associated markers in Т lymphocytes accompanies cervical cancer development and correlates with the change in percentages of regulatory cell populations at systemic level during the initial stages of invasive cervical cancer progression...
2017: Infectious Agents and Cancer
https://www.readbyqxmd.com/read/29070122/-levels-of-t-lymphocyte-subsets-il-17-il-35-and-ifn-%C3%AE-in-peripheral-blood-and-their-clinical-significance-in-patients-with-multiple-myeloma
#20
Zhao-Juan Xu, Dong Zhao, Fu-Ping Li, Ying-Fang Wang, Hui-Ying Xiao, Xu Wang
OBJECTIVE: To explore the levels of T-lymphocyte subsets and IL-17, IL-35, IFN-γ in peripheral blood of patients with multiple myeloma(MM) and their clinical significance. METHODS: A total of 86 MM patients in our hospital from January 2014 to January 2017 were enrolled in MM group and 30 healthy persons were enrolled in control group, the CD4+/CD8+ T cells ratio, CD4+CD25high/+ CD127low/- Treg level in peripheral blood were detected by flow cytometer. The levels of IL-17, IL-35 and IFN-γ in peripheral serum were detected by ELISA, and the differences of detected indicators between different groups were compared...
October 2017: Zhongguo Shi Yan Xue Ye Xue za Zhi
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