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Immunology and Cell Biology

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https://www.readbyqxmd.com/read/28546550/human-igg2-and-igg4-expressing-memory-b-cells-display-enhanced-molecular-and-phenotypic-signs-of-maturity-and-accumulate-with-age
#1
Britt G de Jong, Hanna IJspeert, Lemelinda Marques, Mirjam van der Burg, Jacques J M van Dongen, Bruno G Loos, Menno C van Zelm
The mechanisms involved in sequential immunoglobulin (IG)G class switching are still largely unknown. Sequential IG class switching is linked to higher levels of somatic hypermutation (SHM) in vivo, but it remains unclear if these are generated temporally during an immune response or upon activation in a secondary response. We here aimed to uncouple these processes and to distinguish memory B cells from primary and secondary immune responses. SHM levels and IgG subclasses were studied with 454 pyrosequencing on PBMC from young children and adults as models for primary and secondary immunological memory...
May 26, 2017: Immunology and Cell Biology
https://www.readbyqxmd.com/read/28546549/restimulation-induced-t-cell-death-through-ntb-a-sap-signaling-pathway-is-impaired-in-tuberculosis-patients-with-depressed-immune-responses
#2
Rodrigo E Hernández Del Pino, Joaquín M Pellegrini, Ana I Rovetta, Delfina Peña, Guadalupe I Álvarez, Agustín Rolandelli, Rosa M Musella, Domingo J Palmero, Alejandro Malbran, Virginia Pasquinelli, Verónica E García
Production of IFN-γ contributes to host defense against Mycobacterium tuberculosis (Mtb) infection. We previously demonstrated that Signaling lymphocytic activation molecule-associated protein (SAP) expression on cells from tuberculosis (TB) patients was inversely correlated with IFN-γ production. Here we first investigated the role of NK, T and B cell antigen (NTB-A)/SAP pathway in the regulation of Th1 response against Mtb. Upon antigen stimulation, NTB-A phosphorylation rapidly increases and afterwards modulates IFN-γ and IL-17 secretion...
May 26, 2017: Immunology and Cell Biology
https://www.readbyqxmd.com/read/28534503/tumour-vessel-normalization-and-immune-checkpoint-blockade-a-new-synergism
#3
Ruth Ganss
No abstract text is available yet for this article.
May 23, 2017: Immunology and Cell Biology
https://www.readbyqxmd.com/read/28529324/a-novel-combination-strategy-for-effectively-targeting-cancer-stem-like-cells
#4
Paul A Beavis, Emma V Petley, Phillip K Darcy
Immunology and Cell Biology accepted article preview online, 22 May 2017. doi:10.1038/icb.2017.39.
May 22, 2017: Immunology and Cell Biology
https://www.readbyqxmd.com/read/28529323/an-immunogenic-phenotype-in-paternal-antigen-specific-cd8-t-cells-at-embryo-implantation-elicits-later-fetal-loss-in-mice
#5
Lachlan M Moldenhauer, Kerrilyn R Diener, John D Hayball, Sarah A Robertson
Central to pregnancy success is a state of T cell tolerance to paternal antigens, which is initiated at conception. The role and regulation of specific phenotypes of CD8(+) T cells in mediating pregnancy tolerance is not clear. This study aimed to investigate the impact on pregnancy outcome of altering the cytokine environment during maternal CD8(+) T cell priming in early pregnancy. Transgenic Act-mOVA male mice were mated to C57BL/6 (B6) females to generate fetuses expressing ovalbumin (OVA) as a model paternal antigen...
May 22, 2017: Immunology and Cell Biology
https://www.readbyqxmd.com/read/28508894/factoring-in-cd4-t-cells-during-treatment-of-hiv
#6
Jonathan M Coquet
No abstract text is available yet for this article.
May 16, 2017: Immunology and Cell Biology
https://www.readbyqxmd.com/read/28485382/single-cell-profiling-of-lineage-determining-transcription-factors-in-antigen-specific-cd4-t-cells-reveals-unexpected-complexity-in-recall-responses-during-immune-reconstitution
#7
Chansavath Phetsouphanh, Yin Xu, Mee Ling Munier, John J Zaunders, Anthony D Kelleher
Recent studies of protein and gene expression at the single-cell level have revealed that the memory T-cell compartment is more heterogeneous than previously acknowledged. Identifying different T helper subsets involved in memory responses at the single-cell level is thus necessary to understand the level of heterogeneity within this population. Antigen-specific CD4(+) T cells were measured using the CD25/OX40 assay together with a qualitative multiplex single-cell RT-PCR assay. Transcription profiles and subset proportions within the antigen-specific CD4(+) T-cell population were dissected...
May 9, 2017: Immunology and Cell Biology
https://www.readbyqxmd.com/read/28405017/lectin-pathway-factors-in-patients-suffering-from-juvenile-idiopathic-arthritis
#8
Katarzyna Kasperkiewicz, Łukasz Eppa, Anna S Świerzko, Marcin A Bartłomiejczyk, Zbigniew M Żuber, Katarzyna Siniewicz-Luzeńczyk, Elżbieta Mężyk, Misao Matsushita, Leokadia Bąk-Romaniszyn, Krzysztof Zeman, Mikael Skurnik, Maciej Cedzyński
Both complement activation and certain infections (including those with Yersinia sp.) may contribute to the pathogenesis of juvenile idiopathic arthritis (JIA). We investigated factors specific for the lectin pathway of complement: mannose-binding lectin (MBL), ficolins and MBL-associated serine protease-2 (MASP-2), in 144 patients and 98 controls. One hundred and six patients had oligoarticular disease and 38 had polyarticular disease. In 51 patients (out of 133 tested), Yersinia-reactive antibodies were found (JIA Ye(+) group)...
May 9, 2017: Immunology and Cell Biology
https://www.readbyqxmd.com/read/28392557/in-vitro-tracking-and-intracellular-protein-distribution-in-immunology
#9
REVIEW
Kajal Zibaei, Sarah M Russell
New imaging techniques have enabled major advances in understanding how immune reactions are initiated, coordinated and controlled. Imaging methods, which were previously mostly descriptive and supplementary to more quantitative approaches, have now reached sufficient precision and throughput that they are becoming integral to almost all aspects of immunology research. Imaging methodologies that increase the resolution and sensitivity of detection, alongside an ever-expanding range of fluorescent reporters of molecular and cellular activity, and vastly improved analysis methods, have all facilitated this transformation...
May 9, 2017: Immunology and Cell Biology
https://www.readbyqxmd.com/read/28377613/follistatin-like-protein-1-modulates-il-17-signaling-via-il-17rc-regulation-in-stromal-cells
#10
Brian T Campfield, Taylor Eddens, Matthew Henkel, Martin Majewski, William Horne, Yury Chaly, Sarah L Gaffen, Raphael Hirsch, Jay K Kolls
Follistatin-like protein 1 (FSTL-1) possesses several newly identified roles in mammalian biology, including interleukin (IL)-17-driven inflammation, though the mechanism underlying FSTL-1 influence on IL-17-mediated cytokine production is unknown. Using parallel in vitro bone marrow stromal cell models of FSTL-1 suppression, we employed unbiased microarray analysis to identify FSTL-1-regulated genes and pathways that could influence IL-17-dependent production of IL-6 and granulocyte colony-stimulating factor...
May 9, 2017: Immunology and Cell Biology
https://www.readbyqxmd.com/read/28356569/synergistic-targeting-of-breast-cancer-stem-like-cells-by-human-%C3%AE-%C3%AE-t-cells-and-cd8-t-cells
#11
Hung-Chang Chen, Noémie Joalland, John S Bridgeman, Fouad S Alchami, Ulrich Jarry, Mohd Wajid A Khan, Luke Piggott, Yasmin Shanneik, Jianqiang Li, Marco J Herold, Thomas Herrmann, David A Price, Awen M Gallimore, Richard W Clarkson, Emmanuel Scotet, Bernhard Moser, Matthias Eberl
The inherent resistance of cancer stem cells (CSCs) to existing therapies has largely hampered the development of effective treatments for advanced malignancy. To help develop novel immunotherapy approaches that efficiently target CSCs, an experimental model allowing reliable distinction of CSCs and non-CSCs was set up to study their interaction with non-MHC-restricted γδ T cells and antigen-specific CD8(+) T cells. Stable lines with characteristics of breast CSC-like cells were generated from ras-transformed human mammary epithelial (HMLER) cells as confirmed by their CD44(hi) CD24(lo) GD2(+) phenotype, their mesenchymal morphology in culture and their capacity to form mammospheres under non-adherent conditions, as well as their potent tumorigenicity, self-renewal and differentiation in xenografted mice...
May 9, 2017: Immunology and Cell Biology
https://www.readbyqxmd.com/read/28465508/cd8-t-cells-contribute-to-lacrimal-gland-pathology-in-the-nonobese-diabetic-mouse-model-of-sj%C3%A3-gren-syndrome
#12
Jennifer Y Barr, Xiaofang Wang, David K Meyerholz, Scott M Lieberman
Sjögren syndrome is an autoimmune disease characterized by targeted destruction of the lacrimal and salivary glands resulting in symptoms of severe ocular and oral dryness. Despite its prevalence, the mechanisms driving autoimmune manifestations are unclear. In patients and in the nonobese diabetic (NOD) mouse model of Sjögren syndrome, lymphocytic infiltrates consist of CD4 and CD8 T cells, although the role of CD8 T cells in disease pathogenesis has been largely unexplored. Here, we evaluated the contribution of CD8 T cells to lacrimal and salivary gland autoimmunity...
May 3, 2017: Immunology and Cell Biology
https://www.readbyqxmd.com/read/28462950/t-cell-activation-rhogtpase-activating-protein-plays-an-important-role-in-th17-cell-differentiation
#13
Norimasa Tamehiro, Kyoko Nishida, Reiko Yanobu-Takanashi, Motohito Goto, Tadashi Okamura, Harumi Suzuki
T-cell activation RhoGTPase-activating protein (TAGAP) is a GTPase-activating protein specific for RhoA that is exclusively expressed in activated T cells. Genome-wide association studies and metagenome SNPs analyses have indicated that TAGAP is associated with the pathogenesis of multiple autoimmune diseases, including psoriasis, rheumatoid arthritis, Crohn's disease, celiac disease and multiple sclerosis. However, the precise function of TAGAP remains unclear. Because TH17 cells contribute to TAGAP-associated autoimmune diseases, we hypothesized that TAGAP plays key roles in the differentiation and/or function of TH17 cells...
May 2, 2017: Immunology and Cell Biology
https://www.readbyqxmd.com/read/28446796/the-reinvention-of-twentieth-century-microscopy-for-3-dimensional-imaging
#14
REVIEW
L W Whitehead, K McArthur, N D Geoghegan, K L Rogers
Immunology and Cell Biology accepted article preview online, 27 April 2017. doi:10.1038/icb.2017.36.
April 27, 2017: Immunology and Cell Biology
https://www.readbyqxmd.com/read/28440313/regulation-is-no-bad-thing
#15
Emma H Wilson
No abstract text is available yet for this article.
April 25, 2017: Immunology and Cell Biology
https://www.readbyqxmd.com/read/28440312/expanding-role-for-type-i-interferons-in-restricting-hiv-growth
#16
Stephen J Kent, Anthony D Kelleher
No abstract text is available yet for this article.
April 25, 2017: Immunology and Cell Biology
https://www.readbyqxmd.com/read/28356570/idiopathic-pulmonary-fibrosis-and-a-role-for-autoimmunity
#17
REVIEW
Gerard F Hoyne, Hannah Elliott, Steven E Mutsaers, Cecilia M Prêle
Idiopathic pulmonary fibrosis (IPF) is the most common of the idiopathic interstitial pneumonias. It is typically associated with extensive and progressive fibrosis, and is fatal and has limited treatment options. Characteristically IPF patients display large lymphocyte aggregates composed of CD3(+) T cells and CD20(+) B cells within the lung tissue that are located near sites of active fibrosis. In addition, IPF patients can have autoantibodies to a range of host antigens, suggesting a breakdown in immunological tolerance...
April 25, 2017: Immunology and Cell Biology
https://www.readbyqxmd.com/read/28428612/granzyme-k-deficient-mice-show-no-evidence-of-impaired-anti-viral-immunity
#18
Lars T Joeckel, Cody C Allison, Mark Pellegrini, Catherina H Bird, Phillip Ian Bird
The biological role of granzyme K, a serine protease of cytotoxic T lymphocytes (CTL), is controversial. It has been reported to induce perforin-mediated cell death in vitro, but is also reported to be non-cytotoxic and to operate in inflammatory processes. To elucidate the biological role of this protease we have deleted the granzyme K gene in mice (mutant allele: Gzmk(tm1.1Pib); MGI:5636646). Gzmk(-/-) mice are healthy, anatomically normal, fecund, and show normal hematopoietic development. Gzmk(-/-) mice readily recover from Lymphocytic choriomeningitis virus and mouse pox Ectromelia virus infection...
April 21, 2017: Immunology and Cell Biology
https://www.readbyqxmd.com/read/28420873/viewing-immune-regulation-as-it-happens-in-vivo-imaging-for-investigation-of-regulatory-t-cell-function
#19
REVIEW
Michael J Hickey, Zachary Chow
Regulatory T cells (Tregs) play indispensable roles in the immune system, in limiting excessive or inappropriate immune and inflammatory responses. They achieve this function via effects on other immune cells in the secondary lymphoid system, and in peripheral locations such as skin, gut and bone marrow. As for the more extensively-studied cellular players in the immune system, particularly dendritic cells and conventional T cells, in vivo imaging of Tregs via two-photon or multiphoton microscopy (MPM) has been central to the development of understanding how these cells function...
April 19, 2017: Immunology and Cell Biology
https://www.readbyqxmd.com/read/28418020/pathogenic-cd4-t-cells-regulating-b-cell-differentiation-in-autoimmunity-not-exactly-tfh-cells
#20
Stuart G Tangye
No abstract text is available yet for this article.
April 18, 2017: Immunology and Cell Biology
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