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https://www.readbyqxmd.com/read/28440417/increased-cd19-cd24-cd27-b-regulatory-cells-are-associated-with-insulin-resistance-in-patients-with-type-i-hashimoto-s-thyroiditis
#1
Min Yang, Changji Du, Yinping Wang, Jun Liu
Hashimoto's thyroiditis (HT) is characterized by dysregulated immune responses and is commonly associated with insulin resistance. However, the mechanism of insulin resistance in HT remains to be fully elucidated. The aim of the present study was to investigate the correlation between the percentage of B regulatory lymphocytes (Bregs) and insulin resistance in patients with HT but with normal thyroid function (type I). A total of 59 patients with type I HT and 38 healthy volunteers were enrolled in the study...
April 25, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28440200/effect-of-halofuginone-on-the-pathogenesis-of-autoimmune-thyroid-disease-in-different-mice-models
#2
Xin Hou, Jin Zhou, Rong Yang, Shanshan Liu, Mei Bi, Tong Liu, Chenling Fan, Haixia Guan, Yushu Li, Zhongyan Shan, Weiping Teng
OBJECTIVE: Our objectives were to investigate the therapeutic effect of halofuginone (HF) in the treatment of autoimmune thyroid diseases (AITDs) and explore its underlying mechanism of action. METHODS: The Graves' disease (GD) model was generated by immunizing female BALB/c mice with adenovirus expressing the TSH receptor A subunit (Ad-TSHR289). The Ad-TSHRA+HF and Ad-TSHRA+DMSO groups were injected intraperitoneally with HF or the vehicle control (DMSO), respectively...
April 23, 2017: Endocrine, Metabolic & Immune Disorders Drug Targets
https://www.readbyqxmd.com/read/28419993/reduction-in-peripheral-cd19-cd24hcd27-b-cell-frequency-predicts-favourable-clinical-course-in-xelox-treated-patients-with-advanced-gastric-cancer
#3
Wei Li, Dongli Song, Hong Li, Li Liang, Naiqing Zhao, Tianshu Liu
BACKGROUND: Accumulating evidence suggests that regulatory B cells (Bregs) play an important role in modulating the immune response to tumours. Our previous study indicated that a small percentage of peripheral CD19+CD24hCD27+ Breg cells slowed gastric cancer progression in XELOX-treated patients. Here, we further investigated the relationship between dynamic changes in circulating Breg cells and the clinical course in XELOX-treated gastric cancer patients. METHODS: A total of 52 patients with advanced gastric cancer were enrolled in this study...
April 14, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28413769/update-on-biomarkers-to-monitor-clinical-efficacy-response-during-and-post-treatment-in-allergen-immunotherapy
#4
REVIEW
Lubna Kouser, Jasper Kappen, Ross P Walton, Mohamed H Shamji
Allergen immunotherapy (AIT) is an immune modulating treatment for allergic diseases. Although highly effective, some patients do not respond to the treatment. To date there are no surrogate biomarkers that are predictive of the clinical response to AIT. More and more is known about the underlying immunological mechanism involved in AIT. Through modulation of both innate and adaptive immune responses, involving reduced ILC2 and enhanced Treg and Breg induction and functionality, along with induction of IgG4 antibody production which have the capacity to inhibit both allergen-induced basophil responsiveness and CD23-mediated IgE-facilitated allergen presentation, the result is an immune skewing towards a more balanced Type I response...
2017: Current Treatment Options in Allergy
https://www.readbyqxmd.com/read/28405514/regulatory-b-cells-promote-graft-versus-host-disease-prevention-and-maintain-graft-versus-leukemia-activity-following-allogeneic-bone-marrow-transplantation
#5
Yue Hu, Gan-Lin He, Xiang-Yu Zhao, Xiao-Su Zhao, Yu Wang, Lan-Ping Xu, Xiao-Hui Zhang, Xue-Zhong Yu, Kai-Yan Liu, Ying-Jun Chang, Xiao-Jun Huang
Regulatory B cells (Bregs) are involved in the pathogenesis of graft-versus-host disease (GVHD). However, whether Bregs can alleviate acute GVHD without compromising graft-versus-leukemia (GVL) effects remains unclear. Here, we evaluated the role of Bregs in acute GVHD and GVL activity in both a mouse model and a clinical cohort study. In the acute GVHD mouse model, co-transplantation of Bregs prevents onset through inhibiting Th1 and Th17 differentiation and expanding regulatory T cells. In the GVL mouse model, Bregs contributed to the suppression of acute GVHD but had no adverse effect on GVL activity...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/28393618/regulatory-b-cells-are-functionally-impaired-in-patients-having-hemophilia-a-with-inhibitors
#6
Mohamed-Rachid Boulassel, Maryam Al-Ghonimi, Badriya Al-Balushi, Amal Al-Naamani, Zahra Al-Qarni, Yasser Wali, Mohamed Elshinawy, Maryam Al-Shezawi, Hamad Khan, Hanan Nazir, Doaa Khater, Anil Pathare, Salam Al-Kindi
Development of inhibitors remains a major clinical complication in patients with hemophilia A receiving replacement therapy with factor VIII (FVIII). Understanding the immune mechanisms involved in the development of inhibitors can provide valuable information about pathways to human tolerance. Recent evidence indicates that B regulatory (Breg) cells play a pivotal role in controlling the production of antibodies (Abs) while promoting follicular T helper (Tfh) cells and monocytes, expressing the low-density lipoprotein receptor-related protein (LRP/CD91), which is involved in FVIII intake from the circulation...
January 1, 2017: Clinical and Applied Thrombosis/hemostasis
https://www.readbyqxmd.com/read/28389940/circulating-regulatory-b-cell-subsets-in-patients-with-neuromyelitis-optica-spectrum-disorders
#7
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/28385494/schistosome-induced-pulmonary-b-cells-inhibit-allergic-airway-inflammation-and-display-a-reduced-th2-driving-function
#8
L E van der Vlugt, K Obieglo, A Ozir-Fazalalikhan, T Sparwasser, S Haeberlein, H H Smits
Chronic schistosome infections protect against allergic airway inflammation (AAI) via the induction of IL-10-producing splenic regulatory B (Breg) cells. Previous experiments have demonstrated that schistosome-induced pulmonary B cells can also reduce AAI, but act independently of IL-10. We have now further characterized the phenotype and inhibitory activity of these protective pulmonary B cells. We excluded a role for regulatory T (Treg) cell induction as putative AAI-protective mechanisms. Schistosome-induced B cells showed increased CD86 expression and reduced cytokine expression in response to Toll-like receptor (TLR) ligands compared with control B cells...
April 4, 2017: International Journal for Parasitology
https://www.readbyqxmd.com/read/28353409/what-do-we-know-about-the-role-of-regulatory-b-cells-breg-during-the-course-of-infection-of-two-major-parasitic-diseases-malaria-and-leishmaniasis
#9
Roberta Reis Soares, Luciana Maria Ribeiro Antinarelli, Clarice Abramo, Gilson Costa Macedo, Elaine Soares Coimbra, Kézia Katiani Gorza Scopel
Parasitic diseases, such as malaria and leishmaniasis, are relevant public health problems worldwide. For both diseases, the alarming number of clinical cases and deaths reported annually has justified the incentives directed to better understanding of host's factors associated with susceptibility to infection or protection. In this context, over recent years, some studies have given special attention to B lymphocytes with a regulator phenotype, known as Breg cells. Essentially important in the maintenance of immunological tolerance, especially in autoimmune disease models such as rheumatoid arthritis and experimentally induced autoimmune encephalomyelitis, the function of these lymphocytes has so far been poorly explored during the course of diseases caused by parasites...
March 29, 2017: Pathogens and Global Health
https://www.readbyqxmd.com/read/28343877/what-are-nursing-facilities-doing-to-reduce-potentially-avoidable-hospitalizations
#10
Laura Coots Daras, Joyce M Wang, Melvin J Ingber, Catherine Ormond, Nathaniel W Breg, Galina Khatutsky, Zhanlian Feng
OBJECTIVES: Hospitalizations among nursing facility residents are frequent and often potentially avoidable. A number of initiatives and interventions have been developed to reduce excessive hospitalizations; however, little is known about the specific approaches nursing facilities use to address this issue. The objective of this study is to better understand which types of interventions nursing facilities have introduced to reduce potentially avoidable hospitalizations of long-stay nursing facility residents...
May 1, 2017: Journal of the American Medical Directors Association
https://www.readbyqxmd.com/read/28326080/characterization-of-the-highly-prevalent-regulatory-cd24-hi-cd38-hi-b-cell-population-in-human-cord-blood
#11
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/28296255/breg-dependent-islet-transplant-tolerance-is-also-nk-cell-dependent
#12
Christian Schuetz, Kang Mi Lee, Ryan Scott, Lisa Kojima, Laura Washburn, Liye Liu, Wei-Hui Liu, Haley Tector, Ji Lei, Heidi Yeh, James Kim, James F Markmann
Immunologic tolerance to solid organ and islet cell grafts has been achieved in various rodent models using antibodies directed at CD45RB and Tim-1. We have shown that this form of tolerance depends on regulatory B-cells. To elucidate further the mechanism by which Bregs induce tolerance we investigated the requirement of NK and NKT cells in this model. To do so, hyperglycemic B6, μMT, Beige or CD1d(-/-) mice received Balb/c islet grafts and treatment with the tolerance inducing regimen consisting of anti-CD45RB and anti -TIM1...
March 10, 2017: American Journal of Transplantation
https://www.readbyqxmd.com/read/28265257/regulatory-b-cells-in-seropositive-myasthenia-gravis-versus-healthy-controls
#13
Md Rezaul Karim, Hong-Yan Zhang, Jiang Yuan, Qiang Sun, Yun-Fu Wang
OBJECTIVE: To find out if the failure in immunotolerance of myasthenia gravis (MG) is a possible aspect of deduction in Breg cells and to characterize B cell subsets in MG. METHODS: Flow cytometry detection and enzyme-linked immunosorbent assays in peripheral blood films of 10 MG patients and 10 healthy controls (HCs) were performed after isolation of B cells. The CD19(+)CD5(+)CD1d(+) Breg cells percentages were measured to complement a B cell phenotype assay and frequencies of B cell subsets...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28261223/regulatory-b-cells-in-pregnancy-lessons-from-autoimmunity-graft-tolerance-and-cancer
#14
REVIEW
Ruth Marian Guzman-Genuino, Kerrilyn R Diener
The success of pregnancy is contingent on the maternal immune system recognizing and accommodating a growing semi-allogeneic fetus. Specialized subsets of lymphocytes capable of negative regulation are fundamental in this process, and include the regulatory T cells (Tregs) and potentially, regulatory B cells (Bregs). Most of our current understanding of the immune regulatory role of Bregs comes from studies in the fields of autoimmunity, transplantation tolerance, and cancer biology. Bregs control autoimmune diseases and can elicit graft tolerance by inhibiting the differentiation of effector T cells and dendritic cells (DCs), and activating Tregs...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28258042/il-33-induces-both-regulatory-b-cells-and-regulatory-t-cells-in-dextran-sulfate-sodium-induced-colitis
#15
Junfeng Zhu, Ying Xu, Chunyu Zhu, Jian Zhao, Xinrui Meng, Siyao Chen, Tianqi Wang, Xue Li, Li Zhang, Changlong Lu, Hongsheng Liu, Xun Sun
Interleukin (IL)-33 is a member of the IL-1 family. Serum levels of IL-33 are increased in inflammatory bowel diseases (IBD), suggesting that IL-33 is involved in the pathogenesis of IBD, although its role is not clear. In this study, we investigated the role of IL-33 in the regulation of T-helper (Th) cell and B cell responses in mesenteric lymph nodes (MLN) in mice with dextran sulfate sodium (DSS)-induced colitis. Here, we showed that IL-33-treated mice were susceptible to DSS-induced colitis as compared with PBS-treated mice...
February 28, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28257995/regulatory-b-cells-phenotype-function-and-role-in-transplantation
#16
REVIEW
C M Wortel, S Heidt
While B cells are traditionally known for their roles in antibody production, antigen presentation and cytokine production, recent studies have highlighted the existence of B cells with regulatory properties, which have been termed Bregs, analogous to regulatory T cells (Tregs). Bregs have been found to play a role in autoimmune disease, malignancies, infections, and may also be involved in solid organ transplantation. Their main mechanism of action is by promoting the development of Tregs while suppressing effector CD4(+) and CD8(+) T cells, primarily by IL-10 secretion...
March 1, 2017: Transplant Immunology
https://www.readbyqxmd.com/read/28248202/human-regulatory-b-cells-in-health-and-disease-therapeutic-potential
#17
REVIEW
Claudia Mauri, Madhvi Menon
Regulatory B cells (Bregs) modulate immune responses predominantly, although not exclusively, via the release of IL-10. The importance of human Bregs in the maintenance of immune homeostasis comes from a variety of immune-related pathologies, such as autoimmune diseases, cancers, and chronic infections that are often associated with abnormalities in Breg numbers or function. A continuous effort toward understanding Breg biology in healthy individuals will provide new opportunities to develop Breg immunotherapy that could prove beneficial in treating various immune-mediated pathologies...
March 1, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28243231/il-10-producing-cd1d-hi-cd5-regulatory-b-cells-may-play-a-critical-role-in-modulating-immune-homeostasis-in-silicosis-patients
#18
Ying Chen, Chao Li, Yiping Lu, Huiying Zhuang, Weijia Gu, Bo Liu, Fangwei Liu, Jinkai Sun, Bo Yan, Dong Weng, Jie Chen
Silicosis is characterized by chronic lung inflammation and fibrosis, which are extremely harmful to human health. The pathogenesis of silicosis involves uncontrolled immune processes. Evidence supports that regulatory B cells (Bregs) produce negative regulatory cytokines, such as IL-10, which can negatively regulate immune responses in inflammation and autoimmune diseases. Our previous study found that IL-10-producing B cells were involved in the development of silica-induced lung inflammation and fibrosis of mice...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28239367/b10-cell-frequencies-and-suppressive-capacity-in-myasthenia-gravis-are-associated-with-disease-severity
#19
John S Yi, Melissa A Russo, Janice M Massey, Vern Juel, Lisa D Hobson-Webb, Karissa Gable, Shruti M Raja, Kristina Balderson, Kent J Weinhold, Jeffrey T Guptill
Myasthenia gravis (MG) is a T cell-dependent, B cell-mediated disease. The mechanisms for loss of self-tolerance in this disease are not well understood, and recently described regulatory B cell (Breg) subsets have not been thoroughly investigated. B10 cells are a subset of Bregs identified by the production of the immunosuppressive cytokine, interleukin-10 (IL-10). B10 cells are known to strongly inhibit B- and T-cell inflammatory responses in animal models and are implicated in human autoimmunity. In this study, we examined quantitative and qualitative aspects of B10 cells in acetylcholine receptor autoantibody positive MG (AChR-MG) patients and healthy controls...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28228275/rsv-takes-control-of-neonatal-breg-cells-two-hands-on-the-wheel
#20
Peter J M Openshaw
The viral attachment protein of RSV has many surprising features, especially its mimicry of fractalkine (CX3CL1). Zhivaki et al. (2017) now show that, in addition to using this homology to attach to ciliated cells, it activates human neonatal regulatory B cells, thereby inhibiting immunological responses.
February 21, 2017: Immunity
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