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https://www.readbyqxmd.com/read/29788362/similar-inhibition-of-dynamic-adhesion-of-lymphocytes-from-ibd-patients-to-madcam-1-by-vedolizumab-and-etrolizumab-s
#1
Marie-Theres Binder, Emily Becker, Maximilian Wiendl, Lena Schleier, Friederike Fuchs, Moritz Leppkes, Raja Atreya, Clemens Neufert, Imke Atreya, Markus F Neurath, Sebastian Zundler
Background: Although anti-adhesion therapies are a novel mainstay in the treatment of inflammatory bowel diseases (IBDs), the mechanisms controlling integrin-dependent gut homing are poorly elucidated, and the available techniques for translational functional investigations are limited. Methods: We used dynamic adhesion assays to study adhesion of CD4+ T cells, CD8+ T cells, CD19+ B cells, and granulocytes to the addressins MAdCAM-1, VCAM-1, and ICAM-1. The effects of vedolizumab, natalizumab, etrolizumab-s, anti-CD11a, and anti-CD18 antibodies were explored...
May 18, 2018: Inflammatory Bowel Diseases
https://www.readbyqxmd.com/read/29774029/lfa-1-in-t-cell-migration-and-differentiation
#2
REVIEW
Brandon L Walling, Minsoo Kim
Maintenance of homeostatic immune surveillance and development of effective adaptive immune responses require precise regulation of spatial and temporal lymphocyte trafficking throughout the body to ensure pathogen clearance and memory generation. Dysregulation of lymphocyte activation and migration can lead to impaired adaptive immunity, recurrent infections, and an array of autoimmune diseases and chronic inflammation. Central to the recruitment of T cells, integrins are cell surface receptors that regulate adhesion, signal transduction, and migration...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29669928/cx3cr1-identifies-pd-1-therapy-responsive-cd8-t-cells-that-withstand-chemotherapy-during-cancer-chemoimmunotherapy
#3
Yiyi Yan, Siyu Cao, Xin Liu, Susan M Harrington, Wendy E Bindeman, Alex A Adjei, Jin Sung Jang, Jin Jen, Ying Li, Pritha Chanana, Aaron S Mansfield, Sean S Park, Svetomir N Markovic, Roxana S Dronca, Haidong Dong
Although immune checkpoint inhibitors have resulted in durable clinical benefits in a subset of patients with advanced cancer, some patients who did not respond to initial anti-PD-1 therapy have been found to benefit from the addition of salvage chemotherapy. However, the mechanism responsible for the successful chemoimmunotherapy is not completely understood. Here we show that a subset of circulating CD8+ T cells expressing the chemokine receptor CX3CR1 are able to withstand the toxicity of chemotherapy and are increased in patients with metastatic melanoma who responded to chemoimmunotherapy (paclitaxel and carboplatin plus PD-1 blockade)...
April 19, 2018: JCI Insight
https://www.readbyqxmd.com/read/29543389/the-cd11a-and-endothelial-protein-c-receptor-marker-combination-simplifies-and-improves-the-purification-of-mouse-hematopoietic-stem-cells
#4
Alborz Karimzadeh, Vanessa M Scarfone, Erika Varady, Connie Chao, Karin Grathwohl, John W Fathman, David A Fruman, Thomas Serwold, Matthew A Inlay
Hematopoietic stem cells (HSCs) are the self-renewing multipotent progenitors to all blood cell types. Identification and isolation of HSCs for study has depended on the expression of combinations of surface markers on HSCs that reliably distinguish them from other cell types. However, the increasing number of markers required to isolate HSCs has made it tedious, expensive, and difficult for newcomers, suggesting the need for a simpler panel of HSC markers. We previously showed that phenotypic HSCs could be separated based on expression of CD11a and that only the CD11a negative fraction contained true HSCs...
March 15, 2018: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/29507584/clinical-implications-of-cd4-t-cell-subsets-in-adult-atopic-asthma-patients
#5
Matthew Wiest, Katherine Upchurch, Wenjie Yin, Jerome Ellis, Yaming Xue, Bobby Lanier, Mark Millard, HyeMee Joo, SangKon Oh
Background: T cells play a central role in chronic inflammation in asthma. However, the roles of individual subsets of T cells in the pathology of asthma in patients remain to be better understood. Methods: We investigated the potential signatures of T cell subset phenotypes in asthma using fresh whole blood from adult atopic asthma patients (n = 43) and non-asthmatic control subjects (n = 22). We further assessed their potential clinical implications by correlating asthma severity...
2018: Allergy, Asthma, and Clinical Immunology
https://www.readbyqxmd.com/read/29505094/phenotypic-and-functional-heterogeneity-of-human-intermediate-monocytes-based-on-hla-dr-expression
#6
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/29467765/pathogenic-bacterium-acinetobacter-baumannii-inhibits-the-formation-of-neutrophil-extracellular-traps-by-suppressing-neutrophil-adhesion
#7
Go Kamoshida, Takane Kikuchi-Ueda, Satoshi Nishida, Shigeru Tansho-Nagakawa, Tsuneyuki Ubagai, Yasuo Ono
Hospital-acquired infections caused by Acinetobacter baumannii have become problematic because of high rates of drug resistance. A. baumannii is usually harmless, but it may cause infectious diseases in an immunocompromised host. Although neutrophils are the key players of the initial immune response against bacterial infection, their interactions with A. baumannii remain largely unknown. A new biological defense mechanism, termed neutrophil extracellular traps (NETs), has been attracting attention. NETs play a critical role in bacterial killing by bacterial trapping and inactivation...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29427804/escmid-study-group-for-infections-in-compromised-hosts-esgich-consensus-document-on-the-safety-of-targeted-and-biological-therapies-an-infectious-diseases-perspective-immune-checkpoint-inhibitors-cell-adhesion-inhibitors-sphingosine-1-phosphate-receptor-modulators
#8
REVIEW
G Redelman-Sidi, O Michielin, C Cervera, C Ribi, J M Aguado, M Fernández-Ruiz, O Manuel
BACKGROUND: The present review is part of the European Society of Clinical Microbiology and Infectious Diseases (ESCMID) Study Group for Infections in Compromised Hosts (ESGICH) consensus document on the safety of targeted and biological therapies. AIMS: To review, from an infectious diseases perspective, the safety profile of immune checkpoint inhibitors, LFA-3-targeted agents, cell adhesion inhibitors, sphingosine 1-phosphate receptor modulators and proteasome inhibitors, and to suggest preventive recommendations...
February 7, 2018: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/29408047/phenotypic-and-functional-modulations-of-porcine-macrophages-by-interferons-and-interleukin-4
#9
Carmen A Sautter, Gaël Auray, Sylvie Python, Matthias Liniger, Artur Summerfield
Considering that macrophage functions are strongly impacted by the local tissue environment and the type of immune response, the aim of this study was to carefully set the methodological baseline for phenotype and functions of polarized porcine monocyte-derived macrophages. To this end, macrophages were generated in autologous serum alone or with colony-stimulating factor (CSF)-1 or CSF-2, and subsequently polarized with interferon (IFN)γ, interleukin-4 or IFNβ. IFNγ promoted expression of MHC class I, MHC class II, CD11a, and CD40 as well as LPS-induced IL-6 and IL-12...
July 2018: Developmental and Comparative Immunology
https://www.readbyqxmd.com/read/29324974/the-role-of-endoplasmic-reticulum-aminopeptidase-2-in-modulating-immune-detection-of-choriocarcinoma
#10
Michelle D Warthan, Sonya L Washington, Samone E Franzese, Ronald M Ramus, Kyu-Rae Kim, Timothy P York, Efstratios Stratikos, Jerome F Strauss, Eun D Lee
Gestational choriocarcinomas are derived from placental trophoblast cells, with HLA-C being the only class I polymorphic molecule expressed. However, choriocarcinomas have not been profiled for endoplasmic reticulum aminopeptidase 2 (ERAP2) expression. ERAP2 trims peptides presented by human leukocyte antigens (HLA) that have shown to modulate immune response. Over 50% of choriocarcinomas we screened lack ERAP2 expression, which suggests that the absence of ERAP2 expression allows immune evasion of choriocarcinoma cells...
March 1, 2018: Biology of Reproduction
https://www.readbyqxmd.com/read/29287931/flow-cytometry-analysis-of-cd64-cd18-cd11a-and-cd11b-in-four-children-with-bordetella-pertussis-infection-and-admitted-to-critical-care-new-biomarkers
#11
A García-Salido, A Serrano-González, A M de Azagra-Garde, M Nieto-Moro, G J Melen, M Ramírez-Orellana
No abstract text is available yet for this article.
December 26, 2017: Medicina Intensiva
https://www.readbyqxmd.com/read/29282499/quantitative-proteomic-analysis-of-murine-white-adipose-tissue-for-peritoneal-cancer-metastasis
#12
Peter E Feist, Elizabeth A Loughran, M Sharon Stack, Amanda B Hummon
Cancer metastasis risk increases in older individuals, but the mechanisms for this risk increase are unclear. Many peritoneal cancers, including ovarian cancer, preferentially metastasize to peritoneal fat depots. However, there is a dearth of studies exploring aged peritoneal adipose tissue in the context of cancer. Because adipose tissue produces signals which influence several diseases including cancer, proteomics of adipose tissue in aged and young mice may provide insight into metastatic mechanisms. We analyzed mesenteric, omental, and uterine adipose tissue groups from the peritoneal cavities of young and aged C57BL/6J mouse cohorts with a low-fraction SDS-PAGE gelLC-MS/MS method...
February 2018: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/29207960/decreased-expression-of-the-%C3%AE-2-integrin-on-tumor-cells-is-associated-with-a-reduction-in-liver-metastasis-of-colorectal-cancer-in-mice
#13
Aitor Benedicto, Joana Marquez, Alba Herrero, Elvira Olaso, Elzbieta Kolaczkowska, Beatriz Arteta
BACKGROUND: Lymphocyte Function-Associated Antigen-1 (LFA-1; CD18/CD11a) is one of the main adhesion molecules used by immune cells to infiltrate the liver under inflammatory conditions. Recently, the expression of this integrin has also been reported on several solid tumors, including colorectal cancer. However, its functional role in the metastatic progression to the liver remains unknown. Using in vitro assays and an experimental orthotopic in vivo model of liver metastasis, we aimed to elucidate the role of tumor LFA-1 in the metastatic progression by means of the partial depletion of the β2 subunit of LFA-1, required for integrin activation, firm adhesion and signaling...
December 6, 2017: BMC Cancer
https://www.readbyqxmd.com/read/29197072/induction-of-mast-cell-accumulation-by-chymase-via-an-enzymatic-activity-and-intercellular-adhesion-molecule-1-dependent-mechanism
#14
Huiyun Zhang, Junling Wang, Ling Wang, Mengmeng Zhan, Shigang Li, Zeman Fang, Ciyan Xu, Yanshan Zheng, Shaoheng He
BACKGROUND AND PURPOSE: Chymase is a unique, abundant secretory product of mast cells and a potent chemoattractant for eosinophils, monocytes and neutrophils, but little is known of its influence on mast cell accumulation. EXPERIMENTAL APPROACH: A mouse peritoneal inflammation model, cell migration assay and flowcytometry analysis, were used to investigate the role of chymase in recruiting mast cells. KEY RESULTS: Chymase increased, by up to 5...
February 2018: British Journal of Pharmacology
https://www.readbyqxmd.com/read/29152317/bone-marrow-derived-multipotent-mesenchymal-stromal-cells-from-horses-after-euthanasia
#15
Carmen Schröck, Carina Eydt, Florian Geburek, Lena Kaiser, Felicitas Päbst, Janina Burk, Christiane Pfarrer, Carsten Staszyk
Allogeneic equine multipotent mesenchymal stromal cells (eMSCs) have been proposed for use in regenerative therapies in veterinary medicine. A source of allogeneic eMSCs might be the bone marrow from euthanized horses. The purpose of this study was to compare in vitro characteristics of equine bone marrow derived eMSC (eBM-MSCs) from euthanized horses (eut-MSCs) and from narcotized horses (nar-MSCs). Eut-MSCs and nar-MSCs showed typical eMSC marker profiles (positive: CD44, CD90; negative: CD11a/CD18 and MHCII) and possessed tri-lineage differentiation characteristics...
November 2017: Veterinary Medicine and Science
https://www.readbyqxmd.com/read/29150602/tlr7-mediated-viral-recognition-results-in-focal-type-i-interferon-secretion-by-dendritic-cells
#16
Shin-Ichiroh Saitoh, Fumiko Abe, Atsuo Kanno, Natsuko Tanimura, Yoshiko Mori Saitoh, Ryutaro Fukui, Takuma Shibata, Katsuaki Sato, Takeshi Ichinohe, Mayumi Hayashi, Kazuishi Kubota, Hiroko Kozuka-Hata, Masaaki Oyama, Yorifumi Kikko, Toshiaki Katada, Kenji Kontani, Kensuke Miyake
Plasmacytoid dendritic cells (pDC) sense viral RNA through toll-like receptor 7 (TLR7), form self-adhesive pDC-pDC clusters, and produce type I interferons. This cell adhesion enhances type I interferon production, but little is known about the underlying mechanisms. Here we show that MyD88-dependent TLR7 signaling activates CD11a/CD18 integrin to induce microtubule elongation. TLR7+ lysosomes then become linked with these microtubules through the GTPase Arl8b and its effector SKIP/Plekhm2, resulting in perinuclear to peripheral relocalization of TLR7...
November 17, 2017: Nature Communications
https://www.readbyqxmd.com/read/29133294/proinflammatory-t-cell-status-associated-with-early-life-adversity
#17
Martha M C Elwenspoek, Xenia Hengesch, Fleur A D Leenen, Anna Schritz, Krystel Sias, Violetta K Schaan, Sophie B Mériaux, Stephanie Schmitz, Fanny Bonnemberger, Hartmut Schächinger, Claus Vögele, Jonathan D Turner, Claude P Muller
Early life adversity (ELA) has been associated with an increased risk for diseases in which the immune system plays a critical role. The ELA immune phenotype is characterized by inflammation, impaired cellular immunity, and immunosenescence. However, data on cell-specific immune effects are largely absent. Additionally, stress systems and health behaviors are altered in ELA, which may contribute to the generation of the ELA immune phenotype. The present investigation tested cell-specific immune differences in relationship to the ELA immune phenotype, altered stress parameters, and health behaviors in individuals with ELA ( n = 42) and those without a history of ELA (control, n = 73)...
December 15, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29100055/extracellular-isg15-signals-cytokine-secretion-through-the-lfa-1-integrin-receptor
#18
Caleb D Swaim, Ariella F Scott, Larissa A Canadeo, Jon M Huibregtse
ISG15 is a ubiquitin-like protein that functions in innate immunity both as an intracellular protein modifier and as an extracellular signaling molecule that stimulates IFN-γ secretion. The extracellular function, important for resistance to mycobacterial disease, has remained biochemically uncharacterized. We have established an NK-92 cell-based assay for IFN-γ release, identified residues critical for ISG15 signaling, and identified the cell surface receptor as LFA-1 (CD11a/CD18; αLβ2 integrin). LFA-1 inhibition blocked IFN-γ secretion, splenocytes from CD11a-/- mice did not respond to ISG15, and ISG15 bound directly to the αI domain of CD11a in vitro...
November 2, 2017: Molecular Cell
https://www.readbyqxmd.com/read/29099772/role-of-lfa-1-and-icam-1-in-cancer
#19
REVIEW
Manuel Reina, Enric Espel
The lymphocyte function-associated antigen-1 (LFA-1) (also known as CD11a/CD18 and αL β₂), is just one of many integrins in the human body, but its significance is derived from its exclusive presence in leukocytes. In this review, we summarize the studies relating LFA-1 and its major ligand ICAM-1 (or CD54) with cancer, through the function of lymphocytes and myeloid cells on tumor cells. We consider how LFA-1 mediates the interaction of leukocytes with tumors and the role of ICAM-1 in tumor dynamics, which can be independent of its interaction with LFA-1...
November 3, 2017: Cancers
https://www.readbyqxmd.com/read/29066026/cd4-cd28-kir-cd11a-hi-t-cells-correlate-with-disease-activity-and-are-characterized-by-a-pro-inflammatory-epigenetic-and-transcriptional-profile-in-lupus-patients
#20
Elizabeth Gensterblum, Paul Renauer, Patrick Coit, Faith M Strickland, Nathan C Kilian, Shaylynn Miller, Mikhail Ognenovski, Jonathan D Wren, Pei-Suen Tsou, Emily E Lewis, Kathleen Maksimowicz-McKinnon, W Joseph McCune, Bruce C Richardson, Amr H Sawalha
OBJECTIVE: The goal of this study was to comprehensively characterize CD4+CD28+ T cells overexpressing CD11a and KIR genes, and examine the relationship between this T cell subset, genetic risk, and disease activity in lupus. METHODS: The size of the CD4+CD28+KIR+CD11ahi T cell subset was determined by flow cytometry, and total genetic risk for lupus was calculated in 105 female patients using 43 confirmed genetic susceptibility loci. Primary CD4+CD28+KIR+CD11ahi T cells were isolated from lupus patients or were induced from healthy individuals using 5-azacytidine...
January 2018: Journal of Autoimmunity
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