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NK cell memory

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https://www.readbyqxmd.com/read/28322863/deep-immune-profiling-by-mass-cytometry-links-human-t-and-nk-cell-differentiation-and-cytotoxic-molecule-expression-patterns
#1
Bertram Bengsch, Takuya Ohtani, Ramin Sedaghat Herati, Niels Bovenschen, Kyong-Mi Chang, E John Wherry
The elimination of infected or tumor cells by direct lysis is a key T and NK cell effector function. T and NK cells can kill target cells by coordinated secretion of cytotoxic granules containing one or both pore-forming proteins, perforin and granulysin and combinations of granzyme (Gzm) family effector proteases (in humans: Gzm A, B, K, M and H). Understanding the pattern of expression of cytotoxic molecules and the relationship to different states of T and NK cells may have direct relevance for immune responses in autoimmunity, infectious disease and cancer...
March 17, 2017: Journal of Immunological Methods
https://www.readbyqxmd.com/read/28318628/b-and-t-cell-subpopulations-in-patients-with-severe-idiopathic-membranous-nephropathy-may-predict-an-early-response-to-rituximab
#2
Michelle Rosenzwajg, Eva Languille, Hanna Debiec, Joana Hygino, Karine Dahan, Tabassome Simon, David Klatzmann, Pierre Ronco
Primary membranous nephropathy (PMN) is characterized by antibodies to the podocyte, but little is known about B- and T-cell populations and their response to rituximab is controversial. To help resolve this we compared 33 lymphocyte subpopulations and 27 cytokines/chemokines in 25 patients with severe PMN and 27 age-matched healthy individuals. At baseline, patients had a significantly increased percentage of naive B-cells with significantly decreased switched and non-switched memory B-cells. There was a significantly decreased percentage of natural killer (NK) cells with an increase in the CD56(bright)CD16(-/lo) NK subset...
March 15, 2017: Kidney International
https://www.readbyqxmd.com/read/28292946/nox2-dependent-immunosuppression-in-chronic-myelomonocytic-leukemia
#3
Johan Aurelius, Alexander Hallner, Olle Werlenius, Rebecca Riise, Lars Möllgård, Mats Brune, Markus Hansson, Anna Martner, Fredrik B Thorén, Kristoffer Hellstrand
Chronic myelomonocytic leukemia (CMML) is a myeloproliferative and myelodysplastic neoplasm with few treatment options and dismal prognosis. The role of natural killer (NK) cells and other antileukemic lymphocytes in CMML is largely unknown. We aimed to provide insight into the mechanisms of immune evasion in CMML with a focus on immunosuppressive reactive oxygen species (ROS) formed by the myeloid cell NADPH oxidase-2 (NOX2). The dominant population of primary human CMML cells was found to express membrane-bound NOX2 and to release ROS, which, in turn, triggered extensive PARP-1-dependent cell death in cocultured NK cells, CD8(+) T effector memory cells, and CD8(+) T effector cells...
March 14, 2017: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/28276111/immune-cell-subsets-cytokine-and-cortisol-levels-during-the-first-week-of-life-in-neonates-born-to-pre-eclamptic-mothers
#4
Florentina Sava, Gergely Toldi, András Treszl, Júlia Hajdú, Ágnes Harmath, János Rigó, Tivadar Tulassay, Barna Vásárhelyi
PROBLEM: To address the hypothesis that pre-eclampsia (PE) impacts the fetal immune system, we investigated the prevalence of distinct immune cell subsets along with plasma cortisol and cytokine levels in pre-term newborns of PE mothers. METHOD OF STUDY: Cord blood and peripheral blood samples on the 1st, 3rd and 7th postnatal days of life were collected from 14 pre-term infants affected by PE and 14 non-PE pregnancies. We measured plasma cortisol and cytokine levels with immunoassays and assessed the prevalence of T, NK and DC subsets using flow cytometry...
March 9, 2017: American Journal of Reproductive Immunology: AJRI
https://www.readbyqxmd.com/read/28265581/impact-of-desensitization-on-antiviral-immunity-in-hla-sensitized-kidney-transplant-recipients
#5
Mieko Toyoda, Bong-Ha Shin, Shili Ge, James Mirocha, David Thomas, Maggie Chu, Edgar Rodriguez, Christine Chao, Anna Petrosyan, Odette A Galera, Ashley Vo, Jua Choi, Alice Peng, Joseph Kahwaji, Stanley C Jordan
Viral infections represent significant morbidity and mortality factors in kidney transplant recipients, with CMV, EBV, and BKV infections being most common. Desensitization (DES) with IVIg and rituximab with/without plasma exchange followed by kidney transplantation with alemtuzumab induction increased successful transplant rates in HLA-sensitized patients but may represent an increased risk for viral infections due to severe lymphocyte depletion. Here, we report on the posttransplant viral infection status in 372 DES versus 538 non-DES patients...
2017: Journal of Immunology Research
https://www.readbyqxmd.com/read/28250797/changes-in-peripheral-immune-cell-numbers-and-functions-in-octogenarian-walkers-an-acute-exercise-study
#6
Kornelis S M van der Geest, Qi Wang, Thijs M H Eijsvogels, Hans J P Koenen, Irma Joosten, Elisabeth Brouwer, Maria T E Hopman, Joannes F M Jacobs, Annemieke M H Boots
BACKGROUND: Age-related changes of the immune system, termed immunosenescence, may underlie the increased risk of infections and morbidity in the elderly. Little is known about the effects of acute exercise on peripheral immune parameters in octogenarians. Therefore, we investigated acute exercise-induced changes in phenotype and function of the immune system in octogenarians participating in the 2013 edition of the Nijmegen Four Days Marches. Blood sampling was performed at baseline and immediately after 4 days of the walking exercise (30 km/day)...
2017: Immunity & Ageing: I & A
https://www.readbyqxmd.com/read/28237724/the-common-autoimmunity-predisposing-620arg%C3%A2-%C3%A2-trp-variant-of-ptpn22-modulates-macrophage-function-and-morphology
#7
Meihang Li, Hugues Beauchemin, Natalija Popovic, Alan Peterson, Eva d'Hennezel, Ciriaco A Piccirillo, Chao Sun, Constantin Polychronakos
The C1858T single nucleotide polymorphism (SNP) in PTPN22 (protein tyrosine phosphatase nonreceptor 22) leads to the 620 Arg to Trp polymorphism in its encoded human protein LYP. This allelic variant is associated with multiple autoimmune diseases, including type 1 diabetes (T1D), Crohn's disease, rheumatoid arthritis and systemic lupus erythematosus. However, the underlying mechanisms are poorly understood. To study how this polymorphism influences the immune system, we generated a mouse strain with a knock-in of the Trp allele, imitating the human disease-associated variant...
February 22, 2017: Journal of Autoimmunity
https://www.readbyqxmd.com/read/28223983/b-cell-homeostasis-and-functional-properties-are-altered-in-an-hypochlorous-acid-induced-murine-model-of-systemic-sclerosis
#8
Sébastien Sanges, Manel Jendoubi, Niloufar Kavian, Carine Hauspie, Silvia Speca, Jean-Charles Crave, Thomas Guerrier, Guillaume Lefèvre, Vincent Sobanski, Ariel Savina, Eric Hachulla, Pierre-Yves Hatron, Myriam Labalette, Frédéric Batteux, Sylvain Dubucquoi, David Launay
INTRODUCTION: During systemic sclerosis (SSc), peripheral B cells display alterations in subset homeostasis and functional properties and are a promising therapeutic target. However, there is only few data regarding whether these anomalies are accurately reproduced in animal models of SSc. OBJECTIVE: In this work, we assessed the B cell homeostasis modifications in an experimental model of SSc [hypochlorous acid (HOCl)-induced mouse], both at a phenotypic and functional level, during the course of the disease...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28219652/influence-of-age-sex-and-hcmv-serostatus-on-blood-lymphocyte-subpopulations-in-healthy-adults
#9
P A Apoil, B Puissant-Lubrano, N Congy-Jolivet, M Peres, J Tkaczuk, F Roubinet, A Blancher
Using a standardized immunophenotyping procedure we studied thirty-eight distinct subpopulations of T, B and NK lymphocytes in 253 healthy blood donors aged from 19 to 67. We analysed the influence of age, sex and HCMV seropositivity on each lymphocyte subpopulations and established reference ranges. We observed that aging influences the largest number of lymphocyte subpopulations with a slow increase of CD8+ EMRA T lymphocytes and of the numbers of circulating Tregs. The proportion of HLA-DR+ cells among Tregs increased with age and was correlated to the proportion of HLA-DR+ cells among effector T CD4+ lymphocytes...
February 9, 2017: Cellular Immunology
https://www.readbyqxmd.com/read/28215279/about-training-and-memory-nk-cell-adaptation-to-viral-infections
#10
Q Hammer, C Romagnani
Viral infections continuously challenge and shape our immune system. Due to their fine antigen recognition ability, adaptive lymphocytes protect against pathogen reencounter by generating specific immunological memory. Innate cells such as macrophages also adapt to pathogen challenge and mount resistance to reinfection, a phenomenon termed trained immunity. As part of the innate immunity, natural killer (NK) cells can display rapid effector functions and play a crucial role in the control of viral infections, especially by the β-herpesvirus cytomegalovirus (CMV)...
2017: Advances in Immunology
https://www.readbyqxmd.com/read/28198545/the-therapeutic-t-cell-response-induced-by-tumor-delivery-of-tnf-and-melphalan-is-dependent-on-early-triggering-of-natural-killer-and-dendritic-cells
#11
Enrica Balza, Silvia Zanellato, Alessandro Poggi, Daniele Reverberi, Anna Rubartelli, Lorenzo Mortara
The fusion protein L19mTNF (mouse TNF and human antibody fragment L19 directed to fibronectin extra domain-B) selectively targets the tumor vasculature, and in combination with melphalan induces a long-lasting T-cell therapeutic response and immune memory in murine models. Increasing evidence suggests that natural killer (NK) cells act to promote effective T-cell-based antitumor responses. We have analyzed the role of NK cells and dendritic cells (DCs) on two different murine tumor models: WEHI-164 fibrosarcoma and C51 colon carcinoma, in which the combined treatment induces high and low rejection rates respectively...
February 15, 2017: European Journal of Immunology
https://www.readbyqxmd.com/read/28198539/cytomegalovirus-infection-alters-phenotypes-of-different-%C3%AE-%C3%AE-t-cell-subsets-in-renal-transplant-recipients-with-long-term-stable-graft-function
#12
Silvia Lee, Jacquita S Affandi, Ashley B Irish, Patricia Price
Cytomegalovirus (CMV) infection alters the phenotypic profiles of T-cells and NK cells in healthy and immunocompromised individuals. Here, we examined the effects of CMV infection on the phenotype and functions of γδ T-cell subsets in renal transplant recipients (RTR) stable several years after transplantation (n = 80) and healthy controls (n = 72). Differentiation status, function, and expression of HLA-DR, CD57, and LIR-1 on Vδ2(-) and Vδ2(+) γδ T-cells were examined in peripheral blood cells using flow cytometry...
February 15, 2017: Journal of Medical Virology
https://www.readbyqxmd.com/read/28197386/deficiency-of-the-immunostimulatory-cytokine-il-21-promotes-intestinal-neoplasia-via-dysregulation-of-the-th1-th17-axis
#13
Mia Shapiro, Bisweswar Nandi, Gabriel Gonzalez, Rao H Prabhala, Hiroshi Mashimo, Qin Huang, Natasha Y Frank, Nikhil C Munshi, Jason S Gold
IL-21 has reported activity in promoting both Th1 and Th17 immune responses. Its role in sporadic human colorectal cancer is unknown. We aimed to delineate the role of IL-21 in a model of sporadic intestinal carcinogenesis. We found that in APC(MIN/+) mice, ablation of IL-21 increased intestinal tumorigenesis. Expression of pro-inflammatory Th17-associated genes, including RORγt and IL-17A, was increased in the intestine in the absence of IL-21, while expression of antitumor Th1-associated genes Tbet, IFNγ, granzyme B, and perforin was decreased...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/28139257/robust-8-color-flow-cytometry-panel-reveals-enhanced-effector-function-of-nkg2c-cd57-fc%C3%AE%C2%B5r%C3%AE-nk-cells-in-cmv-seropositive-human-blood-donors
#14
Thomas Nerreter, Stephan Zeiß, Thomas Herrmann, Hermann Einsele, Ruth Seggewiss-Bernhardt
Increasing evidence suggests that human NK cells may develop memory-like features. Here, we report the establishment of a robust 8-color flow cytometry panel that allows quantification and functional analysis of different memory-like NK cell subsets (NKG2C(+)/CD57(+), FcεRγ(-)) from relatively small blood samples. We could confirm previous publications reporting an enhanced prevalence of the mentioned memory-like NK cell subsets in CMV seropositive human donors and were able to show a clear congruence between enhanced expression of NKG2C and CD57, the absence of FcεRγ and CMV seropositivity supporting the hypothesis of memory-like NK cell development following viral infections...
January 25, 2017: Immunobiology
https://www.readbyqxmd.com/read/28125551/o-003-the-brain-as-extraintestinal-ibd-manifestation-are-brain-and-cognitive-differences-in-pediatric-crohn-s-disease-associated-with-immune-gene-expression
#15
Christine Mrakotsky, Dunn W Augustine, Christopher Watson, James Canavan, Michael Rivkin, Scott Snapper
BACKGROUND: Structural brain changes in gray and white matter have been previously found in adults with Crohn's disease (CD). We have recently shown similar effects for pediatric CD in 2 separate studies (Mrakotsky et al., 2012, 2013, 2015), particularly for cortical and subcortical brain regions important for cognition, memory and emotion. Our prior data also revealed serum markers of inflammation and steroid therapy to be negatively associated with cortical thickness, subcortical volume, cognitive and school function, however, associations between brain structure and more detailed inflammatory profiles have not been studied...
February 2017: Inflammatory Bowel Diseases
https://www.readbyqxmd.com/read/28125549/o-001-a-diagnostic-approach-of-immune-dysregulation-on-very-early-onset-ibd
#16
Judith Kelsen, Noor Dawany, Maire Conrad, Kathleen Sullivan, Edward Behrens, Marcella Devoto
BACKGROUND: Immune deficiencies have been associated with inflammatory bowel disease (IBD), and are reported to be particularly enriched in patients with very early-onset IBD (VEO-IBD). However, the actual frequency of primary immune deficiencies in an unselected cohort of patients with VEO-IBD is not known, nor is the optimal screening approach for this population. This study was undertaken to identify a diagnostic approach that will enhance identification of children with primary immune deficiencies who present with VEO-IBD...
February 2017: Inflammatory Bowel Diseases
https://www.readbyqxmd.com/read/28099502/clinical-and-immune-effects-of-lenalidomide-in-combination-with-gemcitabine-in-patients-with-advanced-pancreatic-cancer
#17
Gustav J Ullenhag, Fariba Mozaffari, Mats Broberg, Håkan Mellstedt, Maria Liljefors
PURPOSE: To assess the immunomodulatory and clinical effects of lenalidomide with standard treatment of gemcitabine in patients with advanced pancreatic cancer. PATIENTS AND METHODS: Patients with advanced pancreatic cancer were treated in first line with lenalidomide orally for 21 days of a 28 days cycle and the standard regimen for gemcitabine. In Part I, which we previously have reported, the dose of lenalidomide was defined (n = 12). In Part II, every other consecutive patient was treated with either lenalidomide (Group A, n = 11) or gemcitabine (Group B, n = 10) during cycle 1...
2017: PloS One
https://www.readbyqxmd.com/read/28096659/effects-of-multiple-dose-ponesimod-a-selective-s1p1-receptor-modulator-on-lymphocyte-subsets-in-healthy-humans
#18
Stipo Jurcevic, Pierre-Eric Juif, Colleen Hamid, Roseanna Greenlaw, Daniele D'Ambrosio, Jasper Dingemanse
This study investigated the effects of ponesimod, a selective S1P1 receptor modulator, on T lymphocyte subsets in 16 healthy subjects. Lymphocyte subset proportions and absolute numbers were determined at baseline and on Day 10, after once-daily administration of ponesimod (10 mg, 20 mg, and 40 mg each consecutively for 3 days) or placebo (ratio 3:1). The overall change from baseline in lymphocyte count was -1,292±340×10(6) cells/L and 275±486×10(6) cells/L in ponesimod- and placebo-treated subjects, respectively...
2017: Drug Design, Development and Therapy
https://www.readbyqxmd.com/read/28093832/il-15-deficient-mice-develop-enhanced-allergic-responses-to-airway-allergen-exposure
#19
Clinton B Mathias, Craig M Schramm, Linda A Guernsey, Carol A Wu, Stephanie H Polukort, Jeffrey Rovatti, Jennifer Ser-Dolansky, Eric Secor, Sallie S Schneider, Roger S Thrall, Hector L Aguila
BACKGROUND: Interleukin-15 is a pleiotropic cytokine that is critical for the development and survival of multiple hematopoietic lineages. Mice lacking IL-15 have selective defects in populations of several pro-allergic immune cells including natural killer (NK) cells, NKT cells, and memory CD8(+) T cells. We therefore hypothesized that IL-15(-/-) mice will have reduced inflammatory responses during the development of allergic airway disease (AAD). OBJECTIVE: To determine whether IL-15(-/-) mice have attenuated allergic responses in a mouse model of AAD...
January 17, 2017: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28077266/asp0028-in-combination-with-suboptimal-dose-of-tacrolimus-in-cynomolgus-monkey-renal-transplantation-model
#20
Hao Dun, Lijun Song, Anlun Ma, Yanxin Hu, Lin Zeng, Jieying Bai, Guangzhou Zhang, Liangyan Zhang, Kumi Koide, Yohei Okada, Kaori Hanaoka, Rie Yamamoto, Jun Hirose, Tatsuaki Morokata, Pierre Daloze, Huifang Chen
FTY720, a S1P-receptor modulator, has shown to be effective in several transplant and autoimmune disease models, via modulating lymphocyte homing into secondary lymphoid organs (SLOs), and thereby reducing these cells in peripheral blood. ASP0028, a newly developed S1P1/S1P5-selective agonist, presented comparable efficacy to FTY720 and wider safety margins than FTY720. In this study, we assessed the efficacy and safety of ASP0028 co-administered with suboptimal-dose of tacrolimus in the Cynomolgus monkey renal transplantation model...
January 7, 2017: Transplant Immunology
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