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https://www.readbyqxmd.com/read/28683133/increased-frequency-of-circulating-cd19-cd24hicd38hi-b-cells-with-regulatory-capacity-in-patients-with-ankylosing-spondylitis-as-na%C3%A3-ve-for-biological-agents
#1
María-Belén Bautista-Caro, Eugenio de Miguel, Diana Peiteado, Chamaida Plasencia-Rodríguez, Alejandro Villalba, Irene Monjo-Henry, Amaya Puig-Kröger, Paloma Sánchez-Mateos, Emilio Martín-Mola, María-Eugenia Miranda-Carús
Our objective was to study the frequency of circulating CD19+CD24hiCD38hi B cells (Breg) in AS patients. To this end, peripheral blood was drawn from AS patients naïve for TNF blockers (AS/nb) (n = 42) and healthy controls (HC) (n = 42). Six patients donated blood for a second time, 6 months after initiating treatment with anti-TNFα drugs. After isolation by Ficoll-Hypaque, PBMCs were stained with antibodies to CD3, CD4, CD19, CD24, and CD38, and examined by cytometry. For functional studies, total CD19+ B cells were isolated from PBMCs of 3 HC by magnetical sorting...
2017: PloS One
https://www.readbyqxmd.com/read/28558303/colorectal-tumors-are-enriched-with-regulatory-plasmablasts-with-capacity-in-suppressing-t-cell-inflammation
#2
Hui Mao, Fei Pan, Zhiyong Wu, Zhikuan Wang, Yanhua Zhou, Pengfei Zhang, Miaomiao Gou, Guanghai Dai
Inflammation plays a critical role in the initiation of colorectal cancer but is also required to mediate antitumor immunity in established tumors. Therefore, identifying the cellular and molecular components in colorectal tumors is necessary for the understanding of tumor progression and the development of novel treatment strategies. In this study, we demonstrated that a specific subtype of regulatory B cells, the CD19(lo)CD27(hi) plasmablasts, was enriched in the colorectal tumor microenvironment. This CD19(lo)CD27(hi) plasmablast subset presented high interleukin 10 (IL-10) expression but not transforming growth factor-β (TGF-β) secretion...
May 27, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28461108/breg-cells-in-hashimoto-s-thyroiditis-isolated-or-associated-to-further-organ-specific-autoimmune-diseases
#3
Maria Giulia Santaguida, Ilenia Gatto, Giorgio Mangino, Camilla Virili, Ilaria Stramazzo, Poupak Fallahi, Alessandro Antonelli, Maria Segni, Giovanna Romeo, Marco Centanni
Hashimoto thyroiditis (HT) may occur isolated or associated with other non-endocrine autoimmune disorders (NEAD). No data are available about Breg cells in these disorders and this represented the aim of the study. Th17 and Breg cells subset were characterized on peripheral blood mononuclear cells isolated from 18 healthy donors (HD), 19 patients with isolated HT and 26 patients with HT+NEAD. Th17 were higher in patients with isolated HT than in HD but no further changes were seen in patients with HT+NEAD. CD24(hi)CD38(hi) unstimulated Breg cells were similar in HT patients and in HD, but significantly higher in patients with HT+NEAD than in both HT and in HD...
April 28, 2017: Clinical Immunology: the Official Journal of the Clinical Immunology Society
https://www.readbyqxmd.com/read/28461105/il-10-producing-bregs-are-impaired-in-psoriatic-arthritis-and-psoriasis-and-inversely-correlate-with-il-17-and-ifn%C3%AE-producing-t-cells
#4
Athanasios Mavropoulos, Areti Varna, Efterpi Zafiriou, Christos Liaskos, Ioannis Alexiou, Aggeliki Roussaki-Schulze, Marianna Vlychou, Christina Katsiari, Dimitrios P Bogdanos, Lazaros I Sakkas
Our aim was to study CD19(+)CD27(+)CD24(high) memory and CD19(+)CD24(high)CD38(high) transitional and IL-10+Breg cells, known to inhibit Th1 and Th17 cells in experimental arthritis, in psoriatic arthritis (PsA) and psoriasis (Ps). Peripheral blood Breg cells from 60 patients with PsA, 50 patients with Ps and 23 healthy controls were analyzed by flow cytometry. IL-17A-producing CD3(+) T cells and IFNγ-producing CD3(+) T cells and activation of p38 MAPK and STAT3 were also studied. CD19(+)CD27(+)CD24(high) and CD19(+)CD24(high)CD38(high) Breg cells were decreased in PsA and Ps...
April 28, 2017: Clinical Immunology: the Official Journal of the Clinical Immunology Society
https://www.readbyqxmd.com/read/28429331/the-correlation-of-cd19%C3%A2-%C3%A2-cd24%C3%A2-%C3%A2-cd38%C3%A2-%C3%A2-b-cells-and-other-clinicopathological-variables-with-the-proportion-of-circulating-tregs-in-breast-cancer-patients
#5
Mohammad Kazzem Gheybi, Shokrollah Farrokhi, Mohammad Reza Ravanbod, Afshin Ostovar, Valiollah Mehrzad, Pardis Nematollahi
BACKGROUND: T regulatory cells (Tregs) are known to negatively control immune response. The frequency of these cells was inversely correlated with clinical outcomes of breast cancer. CD19(+)CD24(hi)CD38(hi) cells also play a critical role in inflammation and autoimmune disease. However, their function in tumor immune response is less studied. In this study we aimed to determine the role of CD19(+)CD24(hi)CD38(hi) cells and some other clinicopathological variables in increasing the proportion of Tregs in breast cancer patients...
April 20, 2017: Breast Cancer: the Journal of the Japanese Breast Cancer Society
https://www.readbyqxmd.com/read/28389940/circulating-regulatory-b-cell-subsets-in-patients-with-neuromyelitis-optica-spectrum-disorders
#6
Jinming Han, Li Sun, Zhongkun Wang, Xueli Fan, Lifang Wang, Yang-Yang Song, Jie Zhu, Tao Jin
This study analyzed the populations of three different subsets of regulatory B cells (Bregs) in the peripheral blood mononuclear cells (PBMCs) of patients with neuromyelitis optica spectrum disorders (NMOSDs) and explored the relationship between the changes in these subsets of Bregs and the severity of NMOSD. A total of 22 patients with relapsed NMOSDs before treatment were recruited in our study, along with 20 age and gender-matched healthy controls, from May 2015 to March 2016. The percentages and numbers for three different subsets of Bregs including the CD19(+)CD24(hi)CD38(hi), CD19(+)CD24(hi)CD27(+), and CD19(+)CD5(+)CD1d(hi) populations were evaluated in parallel by flow cytometry...
April 7, 2017: Neurological Sciences
https://www.readbyqxmd.com/read/28326080/characterization-of-the-highly-prevalent-regulatory-cd24-hi-cd38-hi-b-cell-population-in-human-cord-blood
#7
Ana Esteve-Solé, Irene Teixidó, Angela Deyà-Martínez, Jordi Yagüe, Ana M Plaza-Martín, Manel Juan, Laia Alsina
The newborn's immune system must transition from a sterile haploidentical uterus to the world full of antigens. Regulatory B-cells (Breg; broadly defined as CD19(+)CD24(hi)CD38(hi)) are tolerance promoters in the adult immune system. They can inhibit IFN-γ and IL-17 production by T-cells and are essential in different conditions, including pregnancy. Breg have still not been well characterized in umbilical cord blood, where we hypothesize that they are pivotal in the achievement of tolerance. We studied CD19(+)CD24(hi)CD38(hi) Breg in healthy umbilical cord blood (hUCB) compared to healthy peripheral adult blood (hAPB)...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28273784/thymosin-%C3%AE-1-expands-deficient-il-10-producing-regulatory-b-cell-subsets-in-relapsing-remitting-multiple-sclerosis-patients
#8
Elena Giacomini, Fabiana Rizzo, Marilena P Etna, Melania Cruciani, Rosella Mechelli, Maria Chiara Buscarinu, Francesca Pica, Cartesio D'Agostini, Marco Salvetti, Eliana M Coccia, Martina Severa
BACKGROUND: B cells are key pathogenic effectors in multiple sclerosis (MS) and several therapies have been designed to restrain B cell abnormalities by directly targeting this lymphocyte population. OBJECTIVES: Moving from our data showing a Toll-like receptor (TLR)7-driven dysregulation of B cell response in relapsing-remitting multiple sclerosis (RRMS) and having found a low serum level of Thymosin-α1 (Tα1) in patients, we investigated whether the addition of this molecule to peripheral blood mononuclear cells (PBMCs) would influence the expansion of regulatory B cell subsets, known to dampen autoimmune inflammation...
February 1, 2017: Multiple Sclerosis: Clinical and Laboratory Research
https://www.readbyqxmd.com/read/28183334/circulating-plasmablasts-plasma-cells-a-potential-biomarker-for-igg4-related-disease
#9
Wei Lin, Panpan Zhang, Hua Chen, Yu Chen, Hongxian Yang, Wenjie Zheng, Xuan Zhang, Fengxiao Zhang, Wen Zhang, Peter E Lipsky
BACKGROUND: Immunoglobulin G4 (IgG4)-related disease (IgG4-RD) is a multisystem fibroinflammatory disease. We previously reported that a circulating cell population expressing CD19(+)CD24(-)CD38(hi) was increased in patients with IgG4-RD. In this study, we aimed to document that this cell population represented circulating plasmablasts/plasma cells, to identify the detailed phenotype and gene expression profile of these IgG4-secreting plasmablasts/plasma cells, and to determine whether this B-cell lineage subset could be a biomarker in IgG4-related disease (IgG4-RD)...
February 10, 2017: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/28183330/th17-and-cd24-hi-cd27-regulatory-b-lymphocytes-are-biomarkers-of-response-to-biologics-in-rheumatoid-arthritis
#10
Sarah Salomon, Caroline Guignant, Pierre Morel, Gauthier Flahaut, Clément Brault, Clément Gourguechon, Patrice Fardellone, Jean-Pierre Marolleau, Brigitte Gubler, Vincent Goëb
BACKGROUND: The aim was to describe the regulatory B and T cells (Breg and Treg) and T helper 17 (Th17) lymphocytes before and under treatment with biologic drugs, and to assess their potential predictive value as biomarkers of response in rheumatoid arthritis (RA). METHODS: This was a non-randomised, single-centre, prospective study. Patients with active RA (American College of Rheumatology (ACR)/European League Against Rheumatism (EULAR) 2010) who required the initiation or switch to any biologic drug except rituximab were included...
February 10, 2017: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/27993172/immune-reconstitution-20%C3%A2-years-after-treatment-with-alemtuzumab-in-a-rheumatoid-arthritis-cohort-implications-for-lymphocyte-depleting-therapies
#11
Faye A H Cooles, Amy E Anderson, Tracey Drayton, Rachel A Harry, Julie Diboll, Lee Munro, Nishanthi Thalayasingham, Andrew J K Östör, John D Isaacs
BACKGROUND: Alemtuzumab, an anti-CD52 monoclonal antibody, was administered to patients with RA between 1991 and 1994. We have followed a cohort of recipients since that time and previously reported significant delays in immune reconstitution. Here we report >20 years of follow-up data from this unique cohort. METHOD: Surviving alemtuzumab recipients were age, sex and disease duration matched with RA controls. Updated mortality and morbidity data were collected for alemtuzumab recipients...
December 20, 2016: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/27965110/alterations-in-b-cell-subsets-in-pediatric-patients-with-early-atopic-dermatitis
#12
Tali Czarnowicki, Hitokazu Esaki, Juana Gonzalez, Yael Renert-Yuval, Patrick Brunner, Margeaux Oliva, Yeriel Estrada, Hui Xu, Xiuzhong Zheng, Sreya Talasila, Isabel Haugh, Thy Huynh, Sarah Lyon, Gary Tran, Hugh Sampson, Mayte Suárez-Fariñas, James G Krueger, Emma Guttman-Yassky, Amy S Paller
BACKGROUND: B cells undergo maturation and class-switching in response to antigen exposure and T-cell help. Early B-cell differentiation has not been defined in patients with early-onset atopic dermatitis (AD). OBJECTIVE: We sought to define the frequency of B-cell subsets associated with progressive B-cell maturation and IgE class-switching. METHODS: We studied 27 children and 34 adults with moderate-to-severe AD (mean SCORAD score, 55 and 65, respectively) and age-matched control subjects (15 children and 27 adults)...
July 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/27837410/effect-of-cd40-cd40l-signaling-on-il-10-producing-regulatory-b-cells-in-chinese-children-with-henoch-sch%C3%A3-nlein-purpura-nephritis
#13
Baohui Yang, Xiongjun Tan, Xiao Xiong, Daoqi Wu, Gaofu Zhang, Mo Wang, Shifang Dong, Wei Liu, Haiping Yang, Qiu Li
The aim of the present study was to examine the role and mechanism of interleukin-10 (IL-10)-producing regulatory B cells (B10 cells) in the pathogenesis of Henoch-Schönlein purpura nephritis (HSPN). We examined the percentage of B10 cells, CD19(+)CD24(hi)CD38(hi) B cells, CD19(+)CD24(hi)CD27(+) B cells, Th17 cells, and T regulatory (Treg) cells within the peripheral blood mononuclear cell (PBMC) population in healthy subjects and HSP/HSPN patients. The percentage of B10 cells and CD19(+)CD24(hi)CD38(hi) B cells was reduced in HSPN patients and that of CD19(+)CD24(hi)CD27(+) B cells was decreased only in HSPN patients with hematuria and proteinuria or massive proteinuria...
November 11, 2016: Immunologic Research
https://www.readbyqxmd.com/read/27815443/human-b-1-and-b-2-b-cells-develop-from-lin-cd34-cd38lo-stem-cells
#14
Tâm D Quách, Thomas J Hopkins, Nichol E Holodick, Raja Vuyyuru, Tim Manser, Ruthee-Lu Bayer, Thomas L Rothstein
The B-1 B cell population is an important bridge between innate and adaptive immunity primarily because B-1 cells produce natural Ab. Murine B-1 and B-2 cells arise from distinct progenitors; however, in humans, in part because it has been difficult to discriminate between them phenotypically, efforts to pinpoint the developmental origins of human B-1 and B-2 cells have lagged. To characterize progenitors of human B-1 and B-2 cells, we separated cord blood and bone marrow Lin(-)CD34(+) hematopoietic stem cells into Lin(-)CD34(+)CD38(lo) and Lin(-)CD34(+)CD38(hi) populations...
November 15, 2016: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/27780620/variations-of-b-cell-subpopulations-in-peripheral-blood-of-healthy-mexican-population-according-to-age-relevance-for-diagnosis-of-primary-immunodeficiencies
#15
L Berrón-Ruíz, G López-Herrera, C E Ávalos-Martínez, C Valenzuela-Ponce, E Ramírez-SanJuan, G Santoyo-Sánchez, F Mújica Guzmán, F J Espinosa-Rosales, L Santos-Argumedo
BACKGROUND: Peripheral blood B cells include lymphocytes at various stages of differentiation, each with a specific function in the immune response. All these stages show variations in percentage and absolute number throughout human life. The numbers and proportions of B subpopulation are influenced by factors such as gender, age, ethnicity, and lifestyle. This study establishes reference values according to age of peripheral blood B cell subtypes in healthy Mexican population. METHODS: Peripheral blood from healthy new-borns and adults were analysed for total B cell subpopulations, using surface markers such as CD19, IgM, IgD, CD21, CD24, CD27, and CD38, to identify naïve, memory with and without isotype switch, double-negative, transitional, and plasmablast cells...
November 2016: Allergologia et Immunopathologia
https://www.readbyqxmd.com/read/27762298/pd-l1-is-a-critical-mediator-of-regulatory-b-cells-and-t-cells-in-invasive-breast-cancer
#16
Honggeng Guan, Yuqiu Wan, Jing Lan, Qin Wang, Zhangyu Wang, Yecheng Li, Jiqing Zheng, Xueguang Zhang, Zemin Wang, Yueping Shen, Fang Xie
Regulatory T cells (Tregs), a key mediator in regulating anti-tumor immune suppression, tumor immune escape, metastasis and relapse, are considered an important therapeutic target in immunotherapy of human cancers. In the present investigation, elevated CD19(+) CD24(+) CD38(+) regulatory B cells (Bregs) were observed in PBMCs of invasive carcinoma of breast (IBCa) patients compared with that in patients with fibroadenoma (FIBma) or healthy individuals, and the positive correlation existed between Bregs and CD4(+) CD25(+) CD127(-) Tregs (r = 0...
October 20, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27717015/regulatory-b10-cells-display-an-altered-homoeostasis-in-acute-graft-versus-host-disease
#17
Geothy Chakupurakal, María Alejandra Garcia-Marquez, Alexander Shimabukuro-Vornhagen, Sandra Kluth, Hans Schlosser, Sebastian Theurich, Christof Scheid, Michael Hallek, Udo Holtick, Michael von Bergwelt-Baildon
OBJECTIVE: The role of B cells and the subgroup of IL-10 producing B cells, known to have a regulatory function, in patients following a haematopoietic stem cell transplant (alloSCT) has not been clearly understood to date. METHODS: We prospectively recruited 95 patients following an alloSCT and studied the B-cell reconstitution on days 30, 90 and 150. Regulatory B10 cells could be analysed in 22 consecutively recruited patients on day 30 post-transplant. RESULTS: The total B-cell percentages in transplant recipients (median 0...
February 2017: European Journal of Haematology
https://www.readbyqxmd.com/read/27716906/decreased-level-of-interleukin-10-producing-b-cells-in-patients-with-pemphigus-but-not-in-patients-with-pemphigoid
#18
M Kabuto, N Fujimoto, T Takahashi, T Tanaka
BACKGROUND: While the frequency of interleukin (IL)-10-producing B (B10) cells is reported to have an inverse correlation with disease activity in some human autoimmune diseases, the association between B10 cells and autoimmune blistering diseases (AIBD) has not been well evaluated. Although several phenotypes of human regulatory B cells have been proposed, the most appropriate one in AIBD has not been established. OBJECTIVE: To evaluate B10 cells in AIBD including their phenotypes...
October 7, 2016: British Journal of Dermatology
https://www.readbyqxmd.com/read/27598971/a-novel-flow-cytometric-assay-for-detection-of-residual-disease-in-patients-with-b-lymphoblastic-leukemia-lymphoma-post-anti-cd19-therapy
#19
Sindhu Cherian, Valerie Miller, Vivian McCullouch, Katy Dougherty, Jonathan R Fromm, Brent L Wood
BACKGROUND: Residual disease detection following therapy is an important prognostic variable in B-lymphoblastic leukemia (B-LL). Most flow cytometric strategies for detecting B cell malignancy utilize CD19 to identify B cells. With growing use of anti-CD19 targeted therapies, alternative strategies are needed for residual disease detection. We describe an approach for residual disease detection in this setting. METHODS: A novel combination was designed using expression of CD22 or CD24 (without CD66b) for B cell detection in combination with markers aberrantly expressed in B-LL (CD10, CD20, CD34, CD38, and CD45)...
September 6, 2016: Cytometry. Part B, Clinical Cytometry
https://www.readbyqxmd.com/read/27596706/role-of-regulatory-b-cells-in-immune-tolerance-to-allergens-and-beyond
#20
REVIEW
Willem van de Veen, Barbara Stanic, Oliver F Wirz, Kirstin Jansen, Anna Globinska, Mübeccel Akdis
Immune tolerance to both self-antigens and innocuous non-self-antigens is essential to protect the host against chronic inflammatory diseases and tissue damage. A wide range of cell types and suppressive molecules are involved in induction and maintenance of tolerance. In addition to their key function in the production of immunoglobulins, B cells can regulate immune responses through their surface molecules and secretion of cytokines. Regulatory B (Breg) cells are characterized by their immunosuppressive capacity, which is often mediated through IL-10 secretion...
September 2016: Journal of Allergy and Clinical Immunology
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