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https://www.readbyqxmd.com/read/29332158/combined-sublethal-irradiation-and-agonist-anti-cd40-enhance-donor-t-cell-accumulation-and-control-of-autochthonous-murine-pancreatic-tumors
#1
Lindsay K Ward-Kavanagh, Kathleen M Kokolus, Timothy K Cooper, Aron E Lukacher, Todd D Schell
Tumor-reactive T lymphocytes can promote the regression of established tumors. However, their efficacy is often limited by immunosuppressive mechanisms that block T cell accumulation or function. ACT provides the opportunity to ameliorate immune suppression prior to transfer of tumor-reactive T cells to improve the therapeutic benefit. We evaluated the combination of lymphodepleting whole body irradiation (WBI) and agonist anti-CD40 (αCD40) antibody on control of established autochthonous murine neuroendocrine pancreatic tumors following the transfer of naïve tumor-specific CD8 T cells...
January 13, 2018: Cancer Immunology, Immunotherapy: CII
https://www.readbyqxmd.com/read/29331497/dietary-antioxidant-micronutrients-alter-mucosal-inflammatory-risk-in-a-murine-model-of-genetic-and-microbial-susceptibility
#2
Joseph F Pierre, Reinhard Hinterleitner, Romain Bouziat, Nathan A Hubert, Vanessa Leone, Jun Miyoshi, Bana Jabri, Eugene B Chang
Inflammatory bowel diseases (IBD) are caused by the convergence of microbial, environmental, and genetic factors. Diet significantly alters these interactions by affecting both the host and microbiome. Using a mucosal inflammatory model that resembles the human condition of ileal pouchitis, we investigated the effects of Control (CONT) or Antioxidant (AOX) diet, containing pharmacologically relevant levels of 4 micronutrients, on disease risk in wild-type and IL-10-/- animals following surgical self-filling (SF) ileal blind loop placement...
December 10, 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/29330815/supplementing-dietary-rosemary-rosmarinus-officinalis-l-powder-and-vitamin-e-in-broiler-chickens-evaluation-of-humoral-immune-response-lymphoid-organs-and-blood-proteins
#3
Hossein Rostami, Alireza Seidavi, Mohammad Dadashbeiki, Yadollah Asadpour, João Simões, Assar Ali Shah, Vito Laudadio, Caterina Losacco, Antonella Perillo, Vincenzo Tufarelli
The aim of the present study was to evaluate the effect rosemary (Rosmarinus officinalis L.) powder (RP) and vitamin E (VE) at different levels on humoral immunity of broilers during a 42-day production cycle. A total of 270 1-day-old male chicks were assigned to nine groups with three replicates of ten birds each, and diets were supplemented with 0, 0.5, or 1.0% RP and 0, 100, or 200 mg/kg VE, respectively. Commercial-inactivated vaccines against avian influenza (AI) and Newcastle disease (ND) viruses, and living infectious bronchitis virus (IBV) vaccine were administered by spray method...
January 12, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29330115/pediatric-onset-evans-syndrome-heterogeneous-presentation-and-high-frequency-of-monogenic-disorders-including-lrba-and-ctla4-mutations
#4
Caroline Besnard, Eva Levy, Nathalie Aladjidi, Marie-Claude Stolzenberg, Aude Magerus-Chatinet, Olivier Alibeu, Patrick Nitschke, Stéphane Blanche, Olivier Hermine, Eric Jeziorski, Judith Landman-Parker, Guy Leverger, Nizar Mahlaoui, Gérard Michel, Isabelle Pellier, Felipe Suarez, Isabelle Thuret, Geneviève de Saint-Basile, Capucine Picard, Alain Fischer, Bénédicte Neven, Frédéric Rieux-Laucat, Pierre Quartier
Evans syndrome (ES) is defined by the combination of autoimmune hemolytic anemia and immune thrombocytopenia. Clinical presentation includes manifestations of immune dysregulation, found in primary immune deficiencies, autoimmune lymphoproliferative syndrome with FAS (ALPS-FAS), Cytotoxic T Lymphocyte Antigen-4 (CTLA-4) and Lipopolysaccharide-Responsive vesicle trafficking Beige-like and Anchor protein (LRBA) defects. We report the clinical history and genetic results of 18 children with ES after excluding ALPS-FAS...
January 9, 2018: Clinical Immunology: the Official Journal of the Clinical Immunology Society
https://www.readbyqxmd.com/read/29327786/differential-effects-of-experimental-hyperthyroidism-on-declined-immunity-of-broiler-chicken
#5
M S Khilji, M A Sandhu, M S Yousaf, A A Saeed, H U Rehman, H Zaneb, M A Rashid
Thyroid hormones (THs) are involved in the development of lymphoid organs and regulation of immune function in birds. However, their role as an immune-modulator in the hyperthyroid state is still debatable. To explore the interrelationship of thyroxine (T4 ) and the immune system, chicks were divided into three groups. Group I was comprised of control birds, who received the basal diet while group II and III were given diets supplemented with 5 μg and 10 μg thyroxine/kg feed, respectively, from 15 to 28 days of age...
January 12, 2018: Journal of Animal Physiology and Animal Nutrition
https://www.readbyqxmd.com/read/29327683/clinical-manifestation-of-malignant-lymphomas-of-the-head-and-neck-region
#6
Katarzyna Bojanowska-Poźniak, Monika Nurkowska, Marian Danilewicz, Wioletta Pietruszewska
INTRODUCTION: Malignant lymphoma (ML) is a neoplasm caused by clonal expansion of undifferentiated B, T and NK-lymphoid cells. WHO classification divides lymphomas into two main types, i.e. Hodgkin lymphoma (HL), and non-Hodgkin lymphoma (NHL), with numerous subtypes. The majority of MLs are localized in lymph nodes, but extranodal locations are also possible. MLs represent approximately 3-5% of all malignant neoplasms in Poland, but their incidence has been increasing in recent years, especially in young patients...
December 30, 2017: Otolaryngologia Polska
https://www.readbyqxmd.com/read/29326436/p66shc-deficiency-enhances-cxcr4-and-ccr7-recycling-in-cll-b-cells-by-facilitating-their-dephosphorylation-dependent-release-from-%C3%AE-arrestin-at-early-endosomes
#7
Laura Patrussi, Nagaja Capitani, Francesca Cattaneo, Noemi Manganaro, Alessandra Gamberucci, Federica Frezzato, Veronica Martini, Andrea Visentin, Pier Giuseppe Pelicci, Mario M D'Elios, Livio Trentin, Gianpietro Semenzato, Cosima T Baldari
Neoplastic cell traffic abnormalities are central to the pathogenesis of chronic lymphocytic leukemia (CLL). Enhanced CXC chemokine receptor-4 (CXCR4) and chemokine receptor-7 (CCR7) recycling contributes to the elevated surface levels of these receptors on CLL cells. Here we have addressed the role of p66Shc, a member of the Shc family of protein adaptors the expression of which is defective in CLL cells, in CXCR4/CCR7 recycling. p66Shc reconstitution in CLL cells reduced CXCR4/CCR7 recycling, lowering their surface levels and attenuating B-cell chemotaxis, due to their accumulation in Rab5+ endosomes as serine-phosphoproteins bound to β-arrestin...
January 12, 2018: Oncogene
https://www.readbyqxmd.com/read/29326360/immunopet-in-inflammatory-bowel-disease-imaging-cd4-t-cells-in-a-murine-model-of-colitis
#8
Amanda Christine Freise, Kirstin A Zettlitz, Felix Bergara Salazar, Richard Tavaré, Wen-Ting K Tsai, Arion Hadjioannou, Nora Rozengurt, Jonathan Braun, Anna M Wu
Inflammatory bowel diseases (IBD) in humans are characterized in part by aberrant CD4+ T cell responses. Currently, identification of foci of inflammation within the gut requires invasive procedures such as colonoscopy and biopsy. Molecular imaging with antibody fragment probes could be used to noninvasively monitor cell subsets causing intestinal inflammation. Here, GK1.5 cys-diabody (cDb), an anti-mouse CD4 antibody fragment derived from the GK1.5 hybridoma, was used as a positron emission tomography (PET) probe for CD4+ T cells in the dextran sulfate sodium (DSS) mouse model of IBD...
January 11, 2018: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/29324984/doca-salt-hypertension-activates-plgf-in-the-spleen-to-couple-sympathetic-drive-and-immune-system-activation
#9
Marialuisa Perrotta, Andrea Lori, Lorenzo Carnevale, Stefania Fardella, Giuseppe Cifelli, Roberta Iacobucci, Francesco Mastroiacovo, Daniele Iodice, Fabio Pallante, Marianna Storto, Giuseppe Lembo, Daniela Carnevale
Aims: Chronic increase of mineralocorticoids obtained by administration of Deoxycorticosterone acetate (DOCA) results in salt dependent hypertension in animals. Despite the lack of a generalized sympathoexcitation, DOCA-salt hypertension has been also associated to overdrive of peripheral nervous system in organs typically targeted by blood pressure (BP), as kidneys and vasculature. Aim of this study was to explore whether DOCA-salt recruits immune system by overactivating sympathetic nervous system in lymphoid organs and whether this is relevant for hypertension...
January 8, 2018: Cardiovascular Research
https://www.readbyqxmd.com/read/29321445/negative-regulation-of-b-cell-responses-and-self-tolerance-to-rna-related-lupus-self-antigen
#10
Takeshi Tsubata
The antibody response to RNA-related antigens such as Sm/RNP requires the endosomal RNA sensor TLR7, and this process is crucial in the development of systemic lupus erythematosus at least in animal models. The inhibitory B cell receptor CD72 is unique because it recognizes Sm/RNP and specifically inhibits the activation of Sm/RNP-reactive B cells by activating SH2-containing protein tyrosine phosphatase 1 (SHP-1). In the normal immune system, Sm/RNP-reactive B cells are tolerized by a unique mechanism that probably involves SHP-1...
2018: Proceedings of the Japan Academy. Series B, Physical and Biological Sciences
https://www.readbyqxmd.com/read/29320898/did-i-miss-it-discovering-hidden-coexisting-hematological-neoplasms-a-single-institutional-review-of-100-collision-tumors
#11
Evan Himchak, Etan Marks, Yang Shi, Yanhua Wang
A collision tumor is defined as two histologically distinct tumor types identified at the same anatomic site. Hematolymphoid proliferative disorders (HLPDs), which coincide with non-hematological neoplasms, can mimic an immune response and can easily be overlooked as an immune reaction to a solid organ neoplasm, especially when low grade. In order to avoid a delay in the diagnosis of a HLPD during the workup for a non-hematological neoplasm, we identified a cohort of 100 cases with a HLPD diagnosis during the initial workup and treatment of a non-hematological neoplasm, or vice versa...
January 1, 2018: International Journal of Surgical Pathology
https://www.readbyqxmd.com/read/29319177/characterization-of-ectopic-lymphoid-structures-in-different-types-of-acute-renal-allograft-rejection
#12
Kitty de Leur, Marian C Clahsen-van Groningen, Thierry P P van den Bosch, Gretchen N de Graav, Dennis A Hesselink, Janneke N Samsom, Carla C Baan, Karin Boer
BACKGROUND: We hypothesize that T cells such as IL-21+BCL6+ T follicular helper cells can regulate B cell mediated immunity within the allograft during acute T-cell mediated rejection, this process may feed chronic allograft rejection on long term. To investigate this mechanism we determined the presence and activation status of organized T and B cells in so-called ectopic lymphoid structures (ELSs) in different types of acute renal allograft rejection. METHODS: Biopsies showing the following primary diagnosis were included: acute/active antibody-mediated rejection, C4d+ (a/aABMR), acute T cell-mediated rejection grade I (aTCMRI), and acute T cell-mediated rejection grade II (aTCMRII)...
January 10, 2018: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/29317694/murine-splenic-b-cells-express-corticotropin-releasing-hormone-receptor-2-that-affect-their-viability-during-a-stress-response
#13
Guillaume Harlé, Sandra Kaminski, David Dubayle, Jean-Pol Frippiat, Armelle Ropars
Chronic stress is now recognized as a risk factor for disease development and/or exacerbation. It has been shown to affect negatively the immune system and notably the humoral immune response. Corticotropin-releasing hormone (CRH) is known to play a crucial role in stress response. CRH receptors are expressed on different immune cells such as granulocytes, monocytes and T cells. However, up to now, no CRH receptor has been described on B cells which are key players of the humoral immune response. In order to highlight new pathways by which stress may impact immunity, we investigated the role of CRH in B cells...
January 9, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29316256/immunosuppressive-effect-of-the-gut-microbiome-altered-by-high-dose-tacrolimus-in-mice
#14
Z Zhang, L Liu, H Tang, W Jiao, S Zeng, Y Xu, Q Zhang, Z Sun, A Mukherjee, X Zhang, X Hu
The alterations induced in gut microbiota by tacrolimus may affect immune function and organ transplantation. Mice were treated with a high-dose of tacrolimus for 14 days. The fecal microbiota were analyzed by pyrosequencing the 16S rRNA genes, and the effect on metabolism was predicted using the sequence data. The subgroups of T cells in the serum, gut-associated lymphoid tissue and draining lymph nodes were determined by flow cytometry. Tacrolimus treatment significantly altered the relative abundance of Allobaculum, Bacteroides and Lactobacillus and CD4+ CD25hi FoxP3+ regulatory T-cells in the colonic mucosa and the circulation...
January 9, 2018: American Journal of Transplantation
https://www.readbyqxmd.com/read/29315653/group-1-innate-lymphoid-cells-in-toxoplasma-gondii-infection
#15
Ildiko Rita Dunay, Andreas Diefenbach
Innate lymphoid cells (ILCs) are a group of lymphocytes that carry out important functions in immunity to infections and in organ homeostasis at epithelial barrier surfaces. ILCs are innate immune cells that provide an early source of cytokines to initiate immune responses against pathogens. Cytotoxic ILCs (i.e., conventional (c)NK cells) and several subsets of helper-like ILCs are the major brances of the ILC family. Conventional NK cells and group 1 ILCs share several functions such as surface receptors and the ability to produce IFN-γ upon activation but they differ in their developmental paths and in their dependence on specific transcription factors...
January 9, 2018: Parasite Immunology
https://www.readbyqxmd.com/read/29304123/infection-and-depletion-of-cd4-group-1-innate-lymphoid-cells-by-hiv-1-via-type-i-interferon-pathway
#16
Juanjuan Zhao, Liang Cheng, Hongbo Wang, Haisheng Yu, Bo Tu, Qiang Fu, Guangming Li, Qi Wang, Yanling Sun, Xin Zhang, Zhenwen Liu, Weiwei Chen, Liguo Zhang, Lishan Su, Zheng Zhang
Innate lymphoid cells (ILCs) are severely depleted during chronic HIV-1 infection by unclear mechanisms. We report here that human ILC1s comprising of CD4+ and CD4- subpopulations were present in various human lymphoid organs but with different transcription programs and functions. Importantly, CD4+ ILC1s expressed HIV-1 co-receptors and were productively infected by HIV-1 in vitro and in vivo. Furthermore, chronic HIV-1 infection activated and depleted both CD4+ and CD4- ILC1s, and impaired their cytokine production activity...
January 5, 2018: PLoS Pathogens
https://www.readbyqxmd.com/read/29303368/imatinib-for-the-treatment-of-hypereosinophilic-syndromes
#17
Grzegorz Helbig
Hypereosinophilic syndromes (HES) encompass a group of disorders defined by sustained peripheral blood hypereosinophilia >1500/mm3 and evidence of eosinophilia-associated organ impairment. Approximately 10% of HES patients may harbor a cryptic deletion on chromosome 4 leading to formation of the FIP1L1-PDGFRA (F/P) fusion gene; these patients are diagnosed as F/P-mutated myeloid/lymphoid neoplasms with eosinophilia (MLN-eo). The results of numerous studies on the efficacy of tyrosine kinase inhibitor, imatinib mesylate (IM), in patients with HES have been published in the literature...
January 5, 2018: Expert Review of Clinical Immunology
https://www.readbyqxmd.com/read/29302250/lineage-differentiation-program-of-invariant-natural-killer-t-cells
#18
REVIEW
Dong-Il Kwon, You Jeong Lee
Invariant natural killer T (iNKT) cells are innate T cells restricted by CD1d molecules. They are positively selected in the thymic cortex and migrate to the medullary area, in which they differentiate into 3 different lineages. Promyelocytic leukemia zinc finger (PLZF) modulates this process, and PLZFhigh, PLZFintermediate, and PLZFlow iNKT cells are designated as NKT2, NKT17, and NKT1 cells, respectively. Analogous to conventional helper CD4 T cells, each subset expresses distinct combinations of transcription factors and produces different cytokines...
December 2017: Immune Network
https://www.readbyqxmd.com/read/29302034/profiling-the-lymphoid-resident-t-cell-pool-reveals-modulation-by-age-and-microbiota
#19
Aurélie Durand, Alexandra Audemard-Verger, Vincent Guichard, Raphaël Mattiuz, Arnaud Delpoux, Pauline Hamon, Nelly Bonilla, Matthieu Rivière, Jérôme Delon, Bruno Martin, Cédric Auffray, Alexandre Boissonnas, Bruno Lucas
Despite being implicated in non-lymphoid tissues, non-recirculating T cells may also exist in secondary lymphoid organs (SLO). However, a detailed characterization of this lymphoid-resident T cell pool has not yet been done. Here we show that a substantial proportion of CD4 regulatory (Treg) and memory (Tmem) cells establish long-term residence in the SLOs of specific pathogen-free mice. Of these SLOs, only T cell residence within Peyer's patches is affected by microbiota. Resident CD4 Treg and CD4 Tmem cells from lymph nodes and non-lymphoid tissues share many phenotypic and functional characteristics...
January 4, 2018: Nature Communications
https://www.readbyqxmd.com/read/29300739/lymphotoxin-expression-in-human-and-murine-renal-allografts
#20
Harald Seeger, Maja T Lindenmeyer, Clemens D Cohen, Carsten Jaeckel, Peter J Nelson, Jin Chen, Ilka Edenhofer, Nicolas Kozakowski, Heinz Regele, Georg Boehmig, Simone Brandt, Rudolf P Wuethrich, Mathias Heikenwalder, Thomas Fehr, Stephan Segerer
The kidney is the most frequently transplanted solid organ. Recruitment of inflammatory cells, ranging from diffuse to nodular accumulations with defined microarchitecture, is a hallmark of acute and chronic renal allograft injury. Lymphotoxins (LTs) mediate the communication of lymphocytes and stromal cells and play a pivotal role in chronic inflammation and formation of lymphoid tissue. The aim of this study was to assess the expression of members of the LT system in acute rejection (AR) and chronic renal allograft injury such as transplant glomerulopathy (TG) and interstitial fibrosis/tubular atrophy (IFTA)...
2018: PloS One
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