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https://www.readbyqxmd.com/read/29779209/gata3-hypermethylation-and-foxp3-hypomethylation-are-associated-with-sustained-protection-and-bystander-effect-following-epicutaneous-immunotherapy-in-peanut-sensitized-mice
#1
Lucie Mondoulet, Vincent Dioszeghy, Florence Busato, Camille Plaquet, Véronique Dhelft, Kevin Bethune, Laurence Leclere, Christian Daviaud, Mélanie Ligouis, Hugh Sampson, Christophe Dupont, Jörg Tost
BACKGROUND: Epicutaneous immunotherapy (EPIT) is a promising method for treating food allergies. In animal models, EPIT induces sustained unresponsiveness and prevents further sensitization mediated by Tregs. Here, we elucidate the mechanisms underlying the therapeutic effect of EPIT, by characterizing the kinetics of DNA methylation changes in sorted cells from spleen and blood and by evaluating its persistence and bystander effect compared to oral immunotherapy (OIT). METHODS: BALB/c mice orally sensitized to peanut proteins (PPE) were treated by EPIT using a PPE-patch or by PPE-OIT...
May 19, 2018: Allergy
https://www.readbyqxmd.com/read/29776614/characterisation-of-peripheral-blood-mononuclear-cell-populations-in-periparturient-dairy-cows-that-develop-metritis
#2
John J Bromfield, Meghan M Watt, Sossi M Iacovides
Bacterial contamination of the uterus following calving is ubiquitous in the dairy cow, 40% of cows develop postpartum uterine infection, including metritis. While predisposing factors like twinning and dystocia are associated with metritis, it is unclear why some cows remain healthy following calving and others develop uterine infection, negatively impacting animal health, milk production and economic return. Here, we profiled peripheral blood mononuclear cells of cows before calving and during postpartum metritis...
June 2018: Veterinary Immunology and Immunopathology
https://www.readbyqxmd.com/read/29775225/cytokines-and-chemokines-differentially-regulate-innate-immune-cell-trafficking-during-post-kala-azar-dermal-leishmaniasis
#3
Ashish K Singh, Vidya N R Das, Ajay Amit, Manas R Dikhit, Vijaya Mahantesh, Shubhankar K Singh, Shyam Naryan, Krishna Pandey, Pradeep Das, Neena Verma, Sanjiva Bimal
Post kala-azar dermal leishmaniasis (PKDL) is often considered to be the anthroponotic reservoir of visceral leishmaniasis (VL) in India. A better understanding of the host immune-response in dermal lesions of PKDL patients is therefore of utmost significance to minimize such patients and to restrict VL transmission. Although the innate immune response is known to play an important role in parasite clearance from dermal lesions, the actual contribution of innate cells to the pathogenicity of PKDL is poorly understood...
May 18, 2018: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/29769201/in-vitro-priming-of-adoptively-transferred-t-cells-with-a-ror%C3%AE-agonist-confers-durable-memory-and-stemness-in-vivo
#4
Xiao Hu, Kinga Majchrzak, Xikui Liu, Megan M Wyatt, Chauncey Spooner, Jacques Moisan, Weiping Zou, Laura L Carter, Chrystal M Paulos
Adoptive T cell transfer therapy is an FDA-approved treatment for leukemia that relies on the ex vivo expansion and re-infusion of a patient's immune cells, which can be engineered with a chimeric antigen receptor (CAR) for more efficient tumor recognition. Type 17 T cells, controlled transcriptionally by RORγ, have been reported to mediate potent anti-tumor effects superior to those observed with conventionally expanded T cells. Here we demonstrate that addition of a synthetic, small molecule RORγ agonist during ex vivo expansion potentiates the anti-tumor activity of human Th17 and Tc17 cells redirected with a CAR...
May 16, 2018: Cancer Research
https://www.readbyqxmd.com/read/29760395/silver-nanoparticles-promote-the-emergence-of-heterogeneic-human-neutrophil-sub-populations
#5
Jennifer A Fraser, Sadie Kemp, Lesley Young, Mark Ross, Morag Prach, Gary R Hutchison, Eva Malone
Neutrophil surveillance is central to nanoparticle clearance. Silver nanoparticles (AgNP) have numerous uses, however conflicting evidence exists as to their impact on neutrophils and whether they trigger damaging inflammation. Neutrophil's importance in innate defence and regulating immune networks mean it's essential we understand AgNP's impact on neutrophil function. Human neutrophil viability following AgNP or Ag Bulk treatment was analysed by flow cytometry and AnV/PI staining. Whilst AgNP exposure did not increase the total number of apoptotic neutrophils, the number of late apoptotic neutrophils was increased, suggesting AgNP increase transit through apoptosis...
May 14, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29755958/gut-microbiota-contributes-to-resistance-against-pneumococcal-pneumonia-in-immunodeficient-rag-mice
#6
Krysta M Felix, Ivan A Jaimez, Thuy-Vi V Nguyen, Heqing Ma, Walid A Raslan, Christina N Klinger, Kristian P Doyle, Hsin-Jung J Wu
Streptococcus pneumoniae causes infection-related mortality worldwide. Immunocompromised individuals, including young children, the elderly, and those with immunodeficiency, are especially vulnerable, yet little is known regarding S. pneumoniae- related pathogenesis and protection in immunocompromised hosts. Recently, strong interest has emerged in the gut microbiota's impact on lung diseases, or the "gut-lung axis." However, the mechanisms of gut microbiota protection against gut-distal lung diseases like pneumonia remain unclear...
2018: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/29733693/blood-neutrophils-are-reprogrammed-in-bronchiectasis
#7
Pallavi Bedi, Donald J Davidson, Brian J McHugh, Adriano G Rossi, Adam T Hill
Introduction Excessive neutrophilic airways inflammation is the central feature of bronchiectasis, but little is known about neutrophils in bronchiectasis. The aim of this study was to assess blood neutrophil phenotype in bronchiectasis patients both whilst stable and during exacerbations. Methods In the clinically-stable arm of this study were 8-healthy volunteers, 8-mild and 8-severe bronchiectasis. In addition, 6-severe bronchiectasis patients were compared with 6-community-acquired pneumonia patients at the start and end of an exacerbation...
May 7, 2018: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/29713323/implication-of-interleukin-12-15-18-and-ruxolitinib-in-the-phenotype-proliferation-and-polyfunctionality-of-human-cytokine-preactivated-natural-killer-cells
#8
Iñigo Terrén, Idoia Mikelez, Irati Odriozola, Andrea Gredilla, Javier González, Ane Orrantia, Joana Vitallé, Olatz Zenarruzabeitia, Francisco Borrego
A brief in vitro stimulation of natural killer (NK) cells with interleukin (IL)-12, IL-15, and IL-18 endow them a memory-like behavior, characterized by higher effector responses when they are restimulated after a resting period of time. These preactivated NK cells, also known as cytokine-induced memory-like (CIML) NK cells, have several properties that make them a promising tool in cancer immunotherapy. In the present study, we have described the effect that different combinations of IL-12, IL-15, and IL-18 have on the generation of human CIML NK cells...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29695052/sulforaphane-modulates-joint-inflammation-in-a-murine-model-of-complete-freund-s-adjuvant-induced-mono-arthritis
#9
João Francisco Silva Rodrigues, Cristiane Silva E Silva, Thayanne França Muniz, Alana Fernanda de Aquino, Larissa Neuza da Silva Nina, Nagila Caroline Fialho Sousa, Luis Claudio Nascimento da Silva, Breno Glaessner Gomes Fernandes de Souza, Tatiana Aranha da Penha, Ana Lúcia Abreu-Silva, Joicy Cortez de Sá, Elizabeth Soares Fernandes, Marcos Augusto Grigolin Grisotto
Rheumatoid arthritis (RA) is characterized by inflammation of one or more joints, and affects ~1% of the adult population worldwide. Sulforaphane (SFN) is a natural compound that has been suggested as an antioxidant. Here, SFN’s effects were evaluated in a murine mono-arthritis model. Mono-arthritis was induced in mice by a single intra-articular injection of Complete Freund’s Adjuvant (CFA-10 µg/joint, in 10 µL) into the ipsilateral joint. The contralateral joint received an equal volume of PBS...
April 24, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29691422/pulmonary-effects-of-adjusting-tidal-volume-to-actual-or-ideal-body-weight-in-ventilated-obese-mice
#10
Elise Guivarch, Guillaume Voiriot, Anahita Rouzé, Stéphane Kerbrat, Jeanne Tran Van Nhieu, Philippe Montravers, Bernard Maitre, Armand Mekontso Dessap, Mathieu Desmard, Jorge Boczkowski
Obese patients could be more susceptible to mechanical ventilation (MV)-induced lung injury than non-obese patients due to weight-dependent changes in lung properties. The aim of this study was therefore to evaluate the pulmonary effects of 2 hours low VT MV in a diet-induced obese mice model, with VT calculated on either the actual body weight (VT aw) or the ideal body weight (VT iw) . First, we hypothesized that a MV with VT aw would be associated with altered lung mechanics and an increased lung inflammation...
April 24, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29655555/effects-of-treatment-of-preweaning-dairy-calves-with-recombinant-bovine-somatotropin-on-immune-responses-and-somatotropic-axis
#11
A L Belli, R B Reis, A Veronese, R Moreira, K Flanagan, J Driver, C D Nelson, J A Clapper, M A Ballou, K C Jeong, R C Chebel
Weaning may be associated with negative energy balance and body weight loss when calves are still immunologically immature, predisposing them to infectious diseases. The aim of the present experiment was to investigate the effects of treatment of preweaning dairy calves with recombinant bovine somatotropin (rbST) on the somatotropic axis, selected immune parameters, and hematology of calves around weaning. Thirty-six Holstein female calves were randomly assigned to receive 1.5 to 1.8 mg of rbST (Posilac, Elanco Animal Health, Greenfield, IN) per kilogram of body weight or to receive injections of saline (saline solution 0...
April 11, 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29602771/transcriptomic-analysis-of-cd4-t-cells-reveals-novel-immune-signatures-of-latent-tuberculosis
#12
Julie G Burel, Cecilia S Lindestam Arlehamn, Nabeela Khan, Grégory Seumois, Jason A Greenbaum, Randy Taplitz, Robert H Gilman, Mayuko Saito, Pandurangan Vijayanand, Alessandro Sette, Bjoern Peters
In the context of infectious diseases, cell population transcriptomics are useful to gain mechanistic insight into protective immune responses, which is not possible using traditional whole-blood approaches. In this study, we applied a cell population transcriptomics strategy to sorted memory CD4 T cells to define novel immune signatures of latent tuberculosis infection (LTBI) and gain insight into the phenotype of tuberculosis (TB)-specific CD4 T cells. We found a 74-gene signature that could discriminate between memory CD4 T cells from healthy latently Mycobacterium tuberculosis -infected subjects and noninfected controls...
May 1, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29593456/robust-production-of-cytomegalovirus-pp65-specific-t-cells-using-a-fully-automated-ifn-%C3%AE-cytokine-capture-system
#13
Nayoun Kim, Young-Sun Nam, Keon-Il Im, Jung-Yeon Lim, Young-Woo Jeon, Yunejin Song, Jong Wook Lee, Seok-Goo Cho
Background: Cytomegalovirus(CMV)-related diseases are a serious cause of morbidity and mortality following hematopoietic stem cell transplantation (HSCT). CMV-specific cytotoxic T lymphocytes (CMV-CTLs) have been reported as an alternative to antiviral drugs that provide long-term CMV-specific immunity without major side effects. However, their application has been limited by the prolonged manufacturing process required. Methods: In this study, we applied the IFN-γ cytokine capture system (CCS) using the fully automated CliniMACS Prodigy device for rapid production of CMV-CTLs, which may be applicable in clinically urgent CMV-related diseases...
January 2018: Transfusion Medicine and Hemotherapy
https://www.readbyqxmd.com/read/29575692/effect-of-the-in-vivo-application-of-granulocyte-colony-stimulating-factor-on-nk-cells-in-bone-marrow-and-peripheral-blood
#14
Xing-Xing Yu, Ting-Ting Han, Ling-Ling Xu, Ying-Jun Chang, Xiao-Jun Huang, Xiang-Yu Zhao
Granulocyte colony-stimulating factor (G-CSF) has been widely used in the field of allogeneic haematopoietic stem cell transplantation (allo-HSCT) for priming donor stem cells from the bone marrow (BM) to peripheral blood (PB) to collect stem cells more conveniently. Donor-derived natural killer (NK) cells have important antitumour functions and immune regulatory roles post-allo-HSCT. The aim of this study was to evaluate the effect of G-CSF on donors' NK cells in BM and PB. The percentage of NK cells among nuclear cells and lymphocyte was significantly decreased and led to increased ratio of T and NK cells in BM and PB post-G-CSF in vivo application...
March 25, 2018: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/29568298/trying-to-see-the-forest-through-the-trees-deciphering-the-nature-of-memory-immunity-to-mycobacterium-tuberculosis
#15
REVIEW
Ian M Orme, Marcela I Henao-Tamayo
The purpose of vaccination against tuberculosis and other diseases is to establish a heightened state of acquired specific resistance in which the memory immune response is capable of mediating an accelerated and magnified expression of protection to the pathogen when this is encountered at a later time. In the earliest studies in mice infected with Mycobacterium tuberculosis , memory immunity and the cells that express this were definable both in terms of kinetics of emergence, and soon thereafter by the levels of expression of markers including CD44, CD62L, and the chemokine receptor CCR7, allowing the identification of effector memory and central memory T cell subsets...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29556041/cancer-associated-fibroblasts-induce-pdl1-neutrophils-through-the-il6-stat3-pathway-that-foster-immune-suppression-in-hepatocellular-carcinoma
#16
Yusheng Cheng, Hui Li, Yinan Deng, Yan Tai, Kaining Zeng, Yingcai Zhang, Wei Liu, Qi Zhang, Yang Yang
Emerging evidence indicate that cancer-associated fibroblasts (CAFs) affect tumor progression by reshaping the tumor microenvironment. Neutrophils are prominent components of solid tumors and important in cancer progression. Whether the phenotype and function of neutrophils in hepatocellular carcinoma (HCC) are influenced by CAFs is not well understood. Herein, we investigated the effect of HCC-derived CAFs (HCC-CAFs) on the neutrophils and explored the biological role of this effect. We found that HCC-CAFs induced chemotaxis of neutrophils and protected them from spontaneous apoptosis...
March 19, 2018: Cell Death & Disease
https://www.readbyqxmd.com/read/29535730/variations-in-cellular-responses-of-mouse-t-cells-to-adenosine-5-triphosphate-stimulation-do-not-depend-on-p2x7-receptor-expression-levels-but-on-their-activation-and-differentiation-stage
#17
Hanaa Safya, Amine Mellouk, Julie Legrand, Sylvain M Le Gall, Mohcine Benbijja, Colette Kanellopoulos-Langevin, Jean M Kanellopoulos, Pierre Bobé
A previous report has shown that regulatory T cells (Treg) were markedly more sensitive to adenosine-5'-triphosphate (ATP) than conventional T cells (Tconv). Another one has shown that Tregs and CD45RBlow Tconvs, but not CD45RBhigh Tconvs, displayed similar high sensitivity to ATP. We have previously reported that CD45RBlow Tconvs expressing B220/CD45RABC molecules in a pre-apoptotic stage are resistant to ATP stimulation due to the loss of P2X7 receptor (P2X7R) membrane expression. To gain a clearer picture on T-cell sensitivity to ATP, we have quantified four different cellular activities triggered by ATP in mouse T cells at different stages of activation/differentiation, in correlation with levels of P2X7R membrane expression...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29533506/a-field-applicable-method-for-flow-cytometric-analysis-of-granulocyte-activation-cryopreservation-of-fixed-granulocytes
#18
Karin de Ruiter, Selma van Staveren, Bart Hilvering, Edward Knol, Nienke Vrisekoop, Leo Koenderman, Maria Yazdanbakhsh
Upon activation granulocytes upregulate several adhesion molecules (CD11b) and granule proteins (CD35, CD66b) and shed surface l-selectin (CD62L). These changes in expression, as assessed by flow cytometry, can be used as markers for activation. Whereas these markers are usually studied in fresh blood samples, a new method is required when samples are collected at a field site with no direct access to a flow cytometer. Therefore, we developed and tested a field-applicable method in which fixed leukocytes were cryopreserved...
March 13, 2018: Cytometry. Part A: the Journal of the International Society for Analytical Cytology
https://www.readbyqxmd.com/read/29505094/phenotypic-and-functional-heterogeneity-of-human-intermediate-monocytes-based-on-hla-dr-expression
#19
Eanna P Connaughton, Serika Naicker, Shirley A Hanley, Stephanie M Slevin, John K Eykelenboom, Noel F Lowndes, Timothy O'Brien, Rhodri Ceredig, Matthew D Griffin, Michael C Dennedy
Human blood monocytes are subclassified as classical, intermediate and nonclassical. In this study, it was shown that conventionally defined human intermediate monocytes can be divided into two distinct subpopulations with mid- and high-level surface expression of HLA-DR (referred to as DRmid and DRhi intermediate monocytes). These IM subpopulations were phenotypically and functionally characterized in healthy adult blood by flow cytometry, migration assays and lipoprotein uptake assays. Their absolute numbers and proportions were then compared in blood samples from obese and nonobese adults...
March 5, 2018: Immunology and Cell Biology
https://www.readbyqxmd.com/read/29447634/pityriasis-lichenoides-like-drug-reaction-a-clinical-histopathologic-study-of-10-cases
#20
Cynthia Magro, Ruifeng Guo, Giang Huong Nguyen, Hamilton Tsang, Shabnam Momtahen
BACKGROUND: Lymphomatoid drug reactions can mimic endogenous T and B cell lymphoproliferative diseases. OBJECTIVES: We present a novel form of cutaneous drug reaction with features of pityriasis lichenoides (PL), a recognized form of T cell dyscrasia. METHODS: Ten cases were studied where a cutaneous eruption exhibiting semblance to PL within a few weeks to months after starting a particular drug. RESULTS: The patient cohort comprised 7 females and 3 males with the mean age of 60 years...
November 15, 2017: Dermatology Online Journal
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