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regulatory B cells

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https://www.readbyqxmd.com/read/28944887/microrna%C3%A2-212-inhibits-colorectal-cancer-cell-viability-and-invasion-by-directly-targeting-pik3r3
#1
Jian Zhang, Yongkang Zhang, Xiaoyun Li, Hongbo Wang, Quan Li, Xiaofeng Liao
Colorectal cancer (CRC) is the third most common cancer and the fourth most common cause of cancer‑associated mortalities worldwide. Emerging evidence has shown that abnormal microRNA (miRNA) expression contributes to CRC carcinogenesis and progression by inhibiting the expression of their target genes. Therefore, investigating the expression patterns and roles of miRNAs specifically involved in CRC formation, and progression would help expand our knowledge on CRC and provide novel therapeutic targets for CRC treatment...
September 20, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28944427/morphological-changes-in-the-thymus-composition-of-its-cells-and-subpopulations-of-peripheral-blood-lymphocytes-during-experimental-acute-ulcerative-colitis
#2
O V Makarova, E A Postovalova
Morphological changes in the thymus and composition of its cells and peripheral blood lymphocytes were studied in experiments on C57Bl/6 mice with sodium dextran sulfate-induced acute ulcerative colitis. Severe acute ulcerative colitis in rats was accompanied by stage III-IV accidental involution of the thymus. This state was characterized by inversion of the layers, death of thymocytes, and increase in the number and area of thymic corpuscles from CK19(+) epithelial cells. Flow cytofluorometry revealed an increase in the relative number of F4/80(+) macrophages in the thymus stroma and CD4(-)CD8(-)CD45(+)CD11c(+) dendritic cells and CD326(+)UEA(+)CD205(-) epithelial cells in the medulla...
September 25, 2017: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28944344/irf4-couples-anabolic-metabolism-to-th1-cell-fate-determination
#3
Radomir Kratchmarov, Simone A Nish, Wen-Hsuan W Lin, William C Adams, Yen-Hua Chen, Bonnie Yen, Nyanza J Rothman, Ulf Klein, Steven L Reiner
Anabolic metabolism in lymphocytes promotes plasmablast and cytotoxic T cell differentiation at the expense of self-renewal. Heightened expression and function of the transcription factor IFN regulatory factor 4 (IRF4) accompany enhanced anabolic induction and full commitment to functional differentiation in B cells and CD8(+) T cells. In this study, we used a genetic approach to determine whether IRF4 plays an analogous role in Th1 cell induction. Our findings indicate that IRF4 promotes determined Th1 cell differentiation in tandem with anabolic metabolism of CD4(+) T cells...
September 1, 2017: Immunohorizons
https://www.readbyqxmd.com/read/28942362/calcitriol-treatment-ameliorates-inflammation-and-blistering-in-mouse-models-of-epidermolysis-bullosa-acquisita
#4
Stefan Tukaj, Katja Bieber, Mareike Witte, Saeedeh Ghorbanalipoor, Enno Schmidt, Detlef Zillikens, Ralf J Ludwig, Michael Kasperkiewicz
A link between hypovitaminosis D and development of autoimmune bullous disorders has been recently suggested, but this association has not been experimentally elaborated. Here, the role of vitamin D was investigated in epidermolysis bullosa acquisita (EBA), an anti-type VII collagen autoantibody-induced blistering skin disease. Oral administration of the hormonally active vitamin D metabolite calcitriol ameliorated clinical disease severity and dermal neutrophil infiltration in both an antibody transfer- and immunization-induced EBA mouse model...
September 20, 2017: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/28942245/regulatory-role-of-nadph-oxidase-2-in-the-polarization-dynamics-and-neurotoxicity-of-microglia-macrophages-after-traumatic-brain-injury
#5
Jing Wang, Merry W Ma, Krishnan M Dhandapani, Darrell W Brann
Traumatic brain injury (TBI) is a leading cause of death and disability. Secondary injuries that develop after the initial trauma contribute to long-lasting neurophysiological deficits. Polarization of microglia/macrophages toward a pro-inflammatory (M1) phenotype may increase the progression of secondary injury following TBI; however, the regulatory and functional mechanisms underlying these changes remain poorly defined. In the present study, we showed elevated expression of NADPH oxidase 2 (NOX2) and activation of nuclear factor-kappa B (NF-κB) predominantly in microglia/macrophages at 4- and 7-days after controlled cortical impact in mice...
September 20, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28942102/skov3-cells-containing-a-truncated-arid1a-protein-have-a-restricted-genome-wide-response-to-glucocorticoids
#6
F E Stubbs, M T Birnie, S C Biddie, S L Lightman, B L Conway-Campbell
AT-rich interacting domain subunit 1a (ARID1a) is an essential SWI/SNF component frequently mutated in human cancers. ARID1a mutations have also been associated with glucocorticoid resistance, potentially related to the well-established role of the SWI/SNF complex in glucocorticoid target gene regulation. Glucocorticoids are steroid hormones important for regulating many physiological processes through the activation of the glucocorticoid receptor (GR). As GR interacts directly with ARID1a, we hypothesized that a truncating ARID mutation would interfere with GR-dependent gene regulation...
September 20, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28941625/a-yin-and-yang-in-epithelial-immunology-the-roles-of-the-%C3%AE-e-cd103-%C3%AE-7-integrin-in%C3%A2-t%C3%A2-cells
#7
REVIEW
Jan-Hendrik B Hardenberg, Andrea Braun, Michael P Schön
The proper function(s) of cell-surface receptors is crucial for the regulation of adaptive immune responses. One such receptor is the αE(CD103)β7 integrin, whose history in science is closely linked with the evolution of our knowledge of immune regulation. Initially described as a marker of intraepithelial T-lymphocytes, this leukocyte integrin is now seen as a dynamically regulated receptor involved in the functional differentiation of some cytotoxic T cells as well as regulatory T cells, thus presumably contributing to the fine-tuning of immune reactions in epithelial compartments...
September 20, 2017: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/28941322/stromal-cell-derived-factor-1-mediates-cardiac-allograft-tolerance-induced-by-human-endometrial-regenerative-cell-based-therapy
#8
Xu Lan, Grace Wang, Xiaoxi Xu, Shanzheng Lu, Xiang Li, Baoren Zhang, Ganggang Shi, Yiming Zhao, Caigan Du, Hao Wang
Endometrial regenerative cells (ERCs) are mesenchymal-like stromal cells, and their therapeutic potential has been tested in the prevention of renal ischemic reperfusion injury, acute liver injury, ulcerative colitis, and immunosuppression. However, their potential in the induction of transplant tolerance has not been investigated. The present study was undertaken to investigate the efficacy of ERCs in inducing cardiac allograft tolerance and the function of stromal cell-derived factor-1 (SDF-1) in the ERC-mediated immunoregulation...
September 23, 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/28941257/absence-of-the-khpa-and-khpb-jag-elor-rna-binding-proteins-suppresses-the-requirement-for-pbp2b-by-overproduction-of-ftsa-in-streptococcus-pneumoniae-d39
#9
Jiaqi J Zheng, Amilcar J Perez, Ho-Ching Tiffany Tsui, Orietta Massidda, Malcolm E Winkler
Suppressor mutations were isolated that obviate the requirement for essential PBP2b in peripheral elongation of peptidoglycan from the midcells of dividing Streptococcus pneumoniae D39 background cells. One suppressor was in a gene encoding a single KH-domain protein (KhpA). ΔkhpA suppresses deletions in most, but not all (mltG), genes involved in peripheral PG synthesis and in the gpsB regulatory gene. ΔkhpA mutations reduce growth rate, decrease cell size, minimally affect shape, and induce expression of the WalRK cell-wall stress regulon...
September 23, 2017: Molecular Microbiology
https://www.readbyqxmd.com/read/28940360/lys63-polyubiquitination-by-the-e3-ligase-casitas-b-lineage-lymphoma-b-cbl-b-modulates-peripheral-regulatory-t-cell-tolerance-in-patients-with-systemic-lupus-erythematosus
#10
Jorge Romo-Tena, Sandra Rajme-López, Luis Aparicio-Vera, Jorge Alcocer-Varela, Diana Gómez-Martín
T cells from systemic lupus erythematosus (SLE) patients display a wide array of anomalies in peripheral immune tolerance mechanisms. It has recently been described the role of ubiquitin ligases such as Cbl-b in these phenomena. However, its role in resistance to suppression phenotype in SLE has not been characterized, which was the aim of the present study. Thirty SLE patients (20 with active disease and 10 with complete remission) and 30 age- and sex-matched healthy controls were recruited. Effector (CD4+CD25-) and regulatory (CD4+CD25+) T cells were purified from PBMCs by magnetic selection...
September 23, 2017: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/28939410/human-cd40l-expressing-type-3-innate-lymphoid-cells-induce-il-10-producing-immature-transitional-regulatory-b-cells
#11
Zsolt István Komlósi, Nóra Kovács, Willem van de Veen, Anna Kirsch, Heinz Benedikt Fahrner, Marcin Wawrzyniak, Ana Rebane, Barbara Stanic, Oscar Palomares, Beate Rückert, Günter Menz, Mübeccel Akdis, György Losonczy, Cezmi A Akdis
BACKGROUND: Type 3 innate lymphoid cells (ILC3s) are involved in the maintenance of mucosal homeostasis; however, their role in immunoregulation has been unknown. Immature transitional regulatory B (itBreg) cells are innate-like B cells with immunosuppressive properties, and the in vivo mechanisms by which they are induced have not been fully clarified. OBJECTIVE: We aimed to investigate the ILC3-B cell interaction that probably takes place in human tonsils. METHODS: ILC3s were isolated from peripheral blood and palatine tonsils, expanded and cocultured with naïve B cells...
September 19, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28939254/inhibition-of-mek-erk1-2-map-kinase-signalling-pathway-reduces-rabies-virus-induced-pathologies-in-mouse-model
#12
Venkataravanappa Manjunatha, Karam Pal Singh, Mani Saminathan, Rajendra Singh, Nayakwadi Shivasharanappa, Channakeshava Sokke Umeshappa, Kuldeep Dhama, Gundallahalli Bayyappa Manjunathareddy
The extracellular signal-regulated kinase (ERK) pathway has been shown to regulate pathogenesis of many viral infections, but its role during rabies virus (RV) infection in vivo is not clear. In the present study, we investigated the potential role of MEK-ERK1/2 signalling pathway in the pathogenesis of rabies in mouse model and its regulatory effects on pro-inflammatory cytokines and other mediators of immunity, and kinetics of immune cells. Mice were infected with 25 LD50 of challenge virus standard (CVS) strain of RV by intracerebral (i...
September 19, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28938016/a-feed-forward-regulation-of-endothelin-receptors-by-c-jun-in-human-non-pigmented-ciliary-epithelial-cells-and-retinal-ganglion-cells
#13
Junming Wang, Hai-Ying Ma, Raghu R Krishnamoorthy, Thomas Yorio, Shaoqing He
c-Jun, c-Jun N-terminal kinase(JNK) and endothelin B (ETB) receptor have been shown to contribute to the pathogenesis of glaucoma. Previously, we reported that an increase of c-Jun and CCAAT/enhancer binding protein β (C/EBPβ) immunohistostaining is associated with upregulation of the ETB receptor within the ganglion cell layer of rats with elevated intraocular pressure (IOP). In addition, both transcription factors regulate the expression of the ETB receptor in human non-pigmented ciliary epithelial cells (HNPE)...
2017: PloS One
https://www.readbyqxmd.com/read/28936215/omics-approaches-for-understanding-grapevine-berry-development-regulatory-networks-associated-with-endogenous-processes-and-environmental-responses
#14
REVIEW
Alejandra Serrano, Carmen Espinoza, Grace Armijo, Claudio Inostroza-Blancheteau, Evelyn Poblete, Carlos Meyer-Regueiro, Anibal Arce, Francisca Parada, Claudia Santibáñez, Patricio Arce-Johnson
Grapevine fruit development is a dynamic process that can be divided into three stages: formation (I), lag (II), and ripening (III), in which physiological and biochemical changes occur, leading to cell differentiation and accumulation of different solutes. These stages can be positively or negatively affected by multiple environmental factors. During the last decade, efforts have been made to understand berry development from a global perspective. Special attention has been paid to transcriptional and metabolic networks associated with the control of grape berry development, and how external factors affect the ripening process...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28936204/modulatory-influence-of-segmented-filamentous-bacteria-on-transcriptomic-response-of-gnotobiotic-mice-exposed-to-tcdd
#15
Robert D Stedtfeld, Benli Chai, Robert B Crawford, Tiffany M Stedtfeld, Maggie R Williams, Shao Xiangwen, Tomomi Kuwahara, James R Cole, Norbert E Kaminski, James M Tiedje, Syed A Hashsham
Environmental toxicants such as 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD), an aryl hydrocarbon receptor (AhR), are known to induce host toxicity and structural shifts in the gut microbiota. Key bacterial populations with similar or opposing functional responses to AhR ligand exposure may potentially help regulate expression of genes associated with immune dysfunction. To examine this question and the mechanisms for AhR ligand-induced bacterial shifts, C57BL/6 gnotobiotic mice were colonized with and without segmented filamentous bacteria (SFB) - an immune activator...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28935847/cd56bright-nk-regulatory-cells-in-filgrastim-primed-donor-blood-or-marrow-products-regulate-chronic-gvhd-cbmtg-randomized-0601-study-results
#16
Amina Kariminia, Sabine Ivison, Bernard Ng, Jacob Rozmus, Susanna Sung, Avani Varshney, Mahmoud Aljurf, Silvy Lachance, Irwin Walker, Cindy Toze, Jeff Lipton, Stephanie J Lee, Jeff Szer, Richard Doocey, Ian Lewis, Clayton Smith, Naeen Chaudhri, Megan K Levings, Raewyn Broady, Gerald Devins, David Szwajcer, Ronan Foley, Sara Mostafavi, Steven Pavletic, Donna A Wall, Stephen Couban, Tony Panzarella, Kirk R Schultz
Randomized trials have conclusively shown higher rates of chronic graft-versus-host disease with filgrastim-stimulated apheresis peripheral blood as a donor source than unstimulated bone marrow. The Canadian Blood and Marrow Transplant Group conducted a phase 3 study of adults who received either filgrastim-stimulated apheresis peripheral blood or filgrastim-stimulated bone marrow from human leukocyte antigen-identical sibling donors. Because all donors received the identical filgrastim dosing schedule, this study allowed for a controlled evaluation of the impact of stem cell source on development of chronic graft-versus-host disease...
September 21, 2017: Haematologica
https://www.readbyqxmd.com/read/28935578/abin1-determines-severity-of-glomerulonephritis-via-activation-of-intrinsic-glomerular-inflammation
#17
Erik A Korte, Dawn J Caster, Michelle T Barati, Min Tan, Shirong Zheng, Celine C Berthier, Frank C Brosius, Mark B Vieyra, Ryan M Sheehan, Michele Kosiewicz, Marcin Wysoczynski, Patrick M Gaffney, David J Salant, Kenneth R McLeish, David W Powell
Transcription factor NF-κB regulates expression of numerous genes that control inflammation and is activated in glomerular cells in glomerulonephritis (GN). We previously identified genetic variants for a NF-κB regulatory, ubiquitin binding protein ABIN1 as risk factors for GN in systemic autoimmunity. The goal here was to define glomerular inflammatory events controlled by ABIN1 function in GN. Nephrotoxic serum nephritis was induced in wild-type (WT) and ubiquitin binding deficient ABIN1[D485N] mice; and renal pathophysiology and glomerular inflammatory phenotypes were assessed...
September 18, 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/28934221/stage-specific-requirement-of-platelet-derived-growth-factor-receptor-%C3%AE-in-embryonic-development
#18
Chen Qian, Carol Wing Yan Wong, Zhongluan Wu, Qiuming He, Huimin Xia, Paul Kwong Hang Tam, Kenneth Kak Yuen Wong, Vincent Chi Hang Lui
BACKGROUND: Platelet-derived growth factor receptor alpha (PDGFRα) is a cell-surface receptor tyrosine kinase for platelet-derived growth factors. Correct timing and level of Pdgfra expression is crucial for embryo development, and deletion of Pdgfra caused developmental defects of multiple endoderm and mesoderm derived structures, resulting in a complex phenotypes including orofacial cleft, spina bifida, rib deformities, and omphalocele in mice. However, it is not clear if deletion of Pdgfra at different embryonic stages differentially affects these structures...
2017: PloS One
https://www.readbyqxmd.com/read/28934122/invasion-of-dendritic-cells-macrophages-and-neutrophils-by-the-bordetella-adenylate-cyclase-toxin-a-subversive-move-to-fool-host-immunity
#19
REVIEW
Giorgio Fedele, Ilaria Schiavoni, Irena Adkins, Nela Klimova, Peter Sebo
Adenylate cyclase toxin (CyaA) is released in the course of B. pertussis infection in the host's respiratory tract in order to suppress its early innate and subsequent adaptive immune defense. CD11b-expressing dendritic cells (DC), macrophages and neutrophils are professional phagocytes and key players of the innate immune system that provide a first line of defense against invading pathogens. Recent findings revealed the capacity of B. pertussis CyaA to intoxicate DC with high concentrations of 3',5'-cyclic adenosine monophosphate (cAMP), which ultimately skews the host immune response towards the expansion of Th17 cells and regulatory T cells...
September 21, 2017: Toxins
https://www.readbyqxmd.com/read/28931816/tgf%C3%AE-r-signalling-controls-cd103-cd11b-dendritic-cell-development-in-the-intestine
#20
C C Bain, J Montgomery, C L Scott, J M Kel, M J H Girard-Madoux, L Martens, T F P Zangerle-Murray, J Ober-Blöbaum, D Lindenbergh-Kortleve, J N Samsom, S Henri, T Lawrence, Y Saeys, B Malissen, M Dalod, B E Clausen, A McI Mowat
CD103(+)CD11b(+) dendritic cells (DCs) are unique to the intestine, but the factors governing their differentiation are unclear. Here we show that transforming growth factor receptor 1 (TGFβR1) has an indispensable, cell intrinsic role in the development of these cells. Deletion of Tgfbr1 results in markedly fewer intestinal CD103(+)CD11b(+) DCs and a reciprocal increase in the CD103(-)CD11b(+) dendritic cell subset. Transcriptional profiling identifies markers that define the CD103(+)CD11b(+) DC lineage, including CD101, TREM1 and Siglec-F, and shows that the absence of CD103(+)CD11b(+) DCs in CD11c-Cre...
September 20, 2017: Nature Communications
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