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https://www.readbyqxmd.com/read/29338551/the-regulatory-roles-of-b-cell-subsets-in-transplantation
#1
Zhulang Chu, Weilong Zou, Yanan Xu, Qiquan Sun, Yong Zhao
B cells mediate allograft rejection through antigen presentation, and production of cytokines and antibodies. More and more immunosuppressive agents specifically targeting B cells and plasma cells have been applied in clinical transplantation. However, recent studies have indicated the regulatory roles of B cells. Therefore, it is vital to clarify the different effects of B cell subsets in organ transplantation so that we can completely understand the diverse functions of B cells in transplantation. Areas covered: This review focuses on the regulatory roles of B cells in transplantation...
January 17, 2018: Expert Review of Clinical Immunology
https://www.readbyqxmd.com/read/29338084/importance-of-b-cells-to-development-of-tregs-and-prolongation-of-tissue-allograft-survival-in-recipients-receiving-autologous-bone-marrow-transplantation
#2
Reginald M Gorczynski, Kaveh Farrokhi, Christopher Gorczynski, Hassan Sadozai, Fang Zhu, Ismat Khatri
We previously showed that congenic bone marrow transplantation (BMTx) post myeloablation augmented tissue allograft survival in association with increased Tregs of both host and bone marrow donor origin. Regulatory B cells (Bregs) can also modulate T cell immunity and B cells may be implicated in the development of Tregs. Accordingly, we explored the effect of B cell depletion in vivo on augmented graft survival post BMTx. C57BL/6 mice received BALB/c skin allografts followed 7d later by myeloablation using cyclophosphamide and busulphan...
January 16, 2018: Immunology
https://www.readbyqxmd.com/read/29335495/dysfunction-of-cd19-cd24hicd27-b-regulatory-cells-in-patients-with-bullous-pemphigoid
#3
Zhenfeng Liu, Erle Dang, Bing Li, Hongjiang Qiao, Liang Jin, Jieyu Zhang, Gang Wang
Bullous pemphigoid (BP) is an autoimmune blistering skin disease characterized by the production of autoantibodies against the hemidesmosomal protein BP180. B regulatory cells (Bregs) are crucial in maintaining self-tolerance and suppressing autoantibody production. However, it is still unclear whether the dysfunctions of Bregs contributes to the autoantibody production in BP patients. In this study, we found that CD19+CD24hiCD27+ Bregs and IL-10+CD19+ Bregs were significantly increased in the peripheral blood samples of BP patients compared with that in healthy controls...
January 15, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29324739/mansonella-perstans-microfilaremic-individuals-are-characterized-by-enhanced-type-2-helper-t-and-regulatory-t-and-b-cell-subsets-and-dampened-systemic-innate-and-adaptive-immune-responses
#4
Manuel Ritter, Winston Patrick Chounna Ndongmo, Abdel Jelil Njouendou, Nora Nganyewo Nghochuzie, Lucy Cho Nchang, Dizzle Bita Tayong, Kathrin Arndts, Norman Nausch, Marc Jacobsen, Samuel Wanji, Laura E Layland, Achim Hoerauf
The filarial nematode Mansonella perstans is endemic throughout Africa, northern South America and the Caribbean. Interestingly, M. perstans-infected individuals present no distinct clinical picture associated with certain pathology. Due to its relatively silent nature, research on this tropical disease has been neglected, especially M. perstans-driven immune responses. A hindrance in obtaining data on M. perstans-specific responses has been the inability to obtain adult worms since their habitats in serous cavities are difficult to access...
January 11, 2018: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29313944/regulatory-b-cells-in-experimental-stroke
#5
REVIEW
Hilary A Seifert, Arthur A Vandenbark, Halina Offner
Current treatment options for human stroke are limited mainly to the modestly effective infusion of tissue plasminogen activator (tPA), with additional improvement of functional independence and higher rates of angiographic revascularization observed after mechanical thrombectomy. However, new therapeutic strategies that address post-stroke immune-mediated inflammatory responses are urgently needed. Recent studies in experimental stroke have firmly implicated immune mechanisms in the propagation and partial resolution of CNS damage after the ischemic event...
January 3, 2018: Immunology
https://www.readbyqxmd.com/read/29306980/sex-in-respiratory-and-skin-allergies
#6
REVIEW
Erminia Ridolo, Cristoforo Incorvaia, Irene Martignago, Marco Caminati, Giorgio Walter Canonica, Gianenrico Senna
A bulk of literature demonstrated that respiratory allergy, and especially asthma, is prevalent in males during childhood, while it becomes more frequent in females from adolescence, i.e., after menarche, to adulthood. The mechanisms underlying the difference between females and males are the effects on the immune response of female hormones and in particular the modulation of inflammatory response by estrogens, as well as the result of the activity of various cells, such as dendritic cells, innate lymphoid cells, Th1, Th2, T regulatory (Treg) and B regulatory (Bregs) cells, and a number of proteins and cytokines, which include interleukin (IL)-4, IL-5, IL-10, and IL-13...
January 6, 2018: Clinical Reviews in Allergy & Immunology
https://www.readbyqxmd.com/read/29259988/increased-circulating-th17-but-decreased-cd4-foxp3-treg-and-cd19-cd1dhicd5-breg-subsets-in-new-onset-graves-disease
#7
Jing Qin, Jin Zhou, Chenling Fan, Na Zhao, Yongping Liu, Shuo Wang, Xuejiao Cui, Mingshi Huang, Haixia Guan, Yushu Li, Zhongyan Shan, Weiping Teng
Th17 and regulatory lymphocyte subsets such as Tregs and Bregs have been reported to play important roles in autoimmune diseases. The aim of this work was to perform quantitative studies of circulating Th17, Tregs, and Bregs in patients with new-onset Graves' disease (GD). Twenty GD patients and 20 healthy controls were involved in this study. Blood samples were taken for flow cytometry detection of CD4+IL-17+ Th17, CD4+Foxp3+ Tregs, and CD19+CD1dhiCD5+ Bregs and meanwhile, for real-time PCR measurement of gene expressions of RORγt, IL-17 and IL-10...
2017: BioMed Research International
https://www.readbyqxmd.com/read/29221714/changes-in-regulatory-b-cell-levels-in-bone-marrow-blood-and-sputum-of-asthmatics-following-inhaled-allergen-challenge
#8
John-Paul Oliveria, Amani I El-Gammal, Michelle Yee, Caitlin D Obminski, Tara X Scime, Rick M Watson, Karen Howie, Paul M O'Byrne, Roma Sehmi, Gail M Gauvreau
Following allergen exposure in the airways of subjects with allergic asthma, Bregs appear to efflux from the bone marrow and accumulate in the lungs with a possible role in dampening local inflammatory responses.
December 5, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29212210/mir-21-silencing-ameliorates-experimental-autoimmune-encephalomyelitis-by-promoting-the-differentiation-of-il-10-producing-b-cells
#9
Hui Wang, Wenrong Xu, Qixiang Shao, Qing Ding
IL-10-producing regulatory B (IL-10+ Breg) cells promote tolerance in autoimmune diseases and transplantation. However, it remains unclear whether microRNAs are involved in the development of IL-10+ Breg cells. Here, we found that microRNA-21 (miR-21) acts as an upstream regulator of IL-10 by targeting the 3' untranslated region of IL-10 mRNA. We also demonstrated that IL-10+ Breg cells exhibit lower miR-21 expression than non-Breg cells and that miR-21 acts as a potent negative regulator of the differentiation of IL-10+ Breg cells...
November 7, 2017: Oncotarget
https://www.readbyqxmd.com/read/29077695/human-b-regulatory-cells-the-new-players-in-autoimmune-disease
#10
José L Maravillas-Montero, Ernesto Acevedo-Ochoa
Although the production of antigen-specific antibodies has been the originally accepted function of B-cells during immune responses, specific subsets that can negatively regulate inflammation, designated regulatory B-cells (Bregs), have been identified recently. These immunosuppressive cells support tolerance, mainly through the production of interleukin 10 and other unconventional factors. There have been emerging data suggesting their importance in diverse normal and pathologic processes. Novel and in development B-cell targeted therapies seem to be ideal treatments for different types of diseasessuch as cancer and allergy...
September 2017: Revista de Investigación Clínica; Organo del Hospital de Enfermedades de la Nutrición
https://www.readbyqxmd.com/read/29051763/il-12p35-inhibits-neuroinflammation-and-ameliorates-autoimmune-encephalomyelitis
#11
Jin Kyeong Choi, Ivy M Dambuza, Chang He, Cheng-Rong Yu, Anita N Uche, Mary J Mattapallil, Rachel R Caspi, Charles E Egwuagu
Multiple sclerosis (MS) is an inflammatory demyelinating disease in which cytokines produced by immune cells that infiltrate the brain and spinal cord play a central role. We show here that the IL-12p35, the alpha subunit of IL-12 or IL-35 cytokine, might be an effective biologic for suppressing neuroinflammatory responses and ameliorating the pathology of experimental autoimmune encephalomyelitis (EAE), the mouse model of human MS. We further show that IL-12p35 conferred protection from neuropathy by inhibiting the expansion of pathogenic Th17 and Th1 cells and inhibiting trafficking of inflammatory cells into the brain and spinal cord...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29046188/association-of-imbalance-of-effector-t-cells-and-regulatory-cells-with-the-severity-of-asthma-and-allergic-rhinitis-in-children
#12
Fei Huang, Jia-Ning Yin, Hong-Bo Wang, Shou-Yue Liu, Ya-Nan Li
PURPOSE: This study investigated the frequency and absolute numbers of different subsets of peripheral blood cells, including CD4+ T cells and CD19+ interleukin (IL) 10+ B regulatory cells (Breg) and their potential association with clinical laboratory measurements in children diagnosed with simple asthma or asthma plus allergic rhinitis (AR). METHOD: The frequency and numbers of peripheral blood CD4+ interferon (IFN) gamma+ T-helper (Th) type 1, CD4+ IL-4+ Th2, CD4+ IL-17A+ Th17, CD4+CD25+ Forkhead Box P3+ regulatory T cells (Treg) and CD19+ IL-10+ Bregs in 22 children with asthma, 17 children with asthma and AR, and 25 healthy controls were determined by flow cytometry...
November 1, 2017: Allergy and Asthma Proceedings:
https://www.readbyqxmd.com/read/29042997/cd19-cd24-hi-cd38-hi-regulatory-b-cells-are-associated-with-insulin-resistance-in-type-i-hashimoto-s-thyroiditis-in-chinese-females
#13
Min Yang, Changji Du, Yinping Wang, Jun Liu
Hashimoto's thyroiditis (HT) is typically associated with insulin resistance. The aim of the present study was to investigate the role of regulatory B cells (Bregs) in insulin resistance in patients with HT. A total of 52 female patients with type I HT and 35 matched healthy volunteers were enrolled. Demographic and laboratorial data were collected. A 75 g oral glucose tolerance test was performed on each subject. Flow cytometry was performed to evaluate the levels of CD19(+)CD24(hi)CD38(hi) Bregs in peripheral blood...
October 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28960473/effects-of-rituximab-and-dexamethasone-on-regulatory-and-proinflammatory-b-cell-subsets-in-patients-with-primary-immune-thrombocytopenia
#14
Sif Gudbrandsdottir, Marie Brimnes, Tania Køllgaard, Hans C Hasselbalch, Claus H Nielsen
OBJECTIVE: To investigate the cytokine production and surface marker composition of B cells in adult patients with newly diagnosed primary immune thrombocytopenia (ITP) before and 12 months after treatment with rituximab + dexamethasone (RTX+DXM) or dexamethasone (DXM). METHODS: Peripheral blood mononuclear cells were isolated from nine patients treated with RTX+DXM, seven patients treated with DXM, and seven healthy donors. Expression of the cell-surface markers CD5, CD27, CD25, and CD19, and intracellular content of IL-6 and IL-10 were measured by flow cytometry...
September 27, 2017: European Journal of Haematology
https://www.readbyqxmd.com/read/28959012/il-12p35-induces-expansion-of-il-10-and-il-35-expressing-regulatory-b-cells-and-ameliorates-autoimmune-disease
#15
Ivy M Dambuza, Chang He, Jin Kyeong Choi, Cheng-Rong Yu, Renxi Wang, Mary J Mattapallil, Paul T Wingfield, Rachel R Caspi, Charles E Egwuagu
Interleukin 35 (IL-35) is a heterodimeric cytokine composed of IL-12p35 and Ebi3 subunits. IL-35 suppresses autoimmune diseases while preventing host defense to infection and promoting tumor growth and metastasis by converting resting B and T cells into IL-10-producing and IL-35-producing regulatory B (Breg) and T (Treg) cells. Despite sharing the IL-12p35 subunit, IL-12 (IL-12p35/IL-12p40) promotes inflammatory responses whereas IL-35 (IL-12p35/Ebi3) induces regulatory responses, suggesting that IL-12p35 may have unknown intrinsic immune-regulatory functions regulated by its heterodimeric partner...
September 28, 2017: Nature Communications
https://www.readbyqxmd.com/read/28957824/the-role-of-regulatory-b-cells-in-allergen-immunotherapy
#16
Willem van de Veen
PURPOSE OF REVIEW: Allergen immunotherapy (AIT) is currently the only curative treatment available for allergic diseases, and has been used in clinical practice for over a century. Induction and maintenance of immune tolerance to nonhazardous environmental and self-antigens is essential to maintain homeostasis and prevent chronic inflammation. Regulatory B (BREG) cells are immunoregulatory cells that protect against chronic inflammatory responses primarily through production of anti-inflammatory cytokines such as IL-10, transforming growth factor-β, and IL-35...
December 2017: Current Opinion in Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28939410/human-cd40l-expressing-type-3-innate-lymphoid-cells-induce-il-10-producing-immature-transitional-regulatory-b-cells
#17
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/28931679/pathogenic-correlates-of-simian-immunodeficiency-virus-associated-b-cell-dysfunction
#18
Egidio Brocca-Cofano, David Kuhrt, Basile Siewe, Cuiling Xu, George S Haret-Richter, Jodi Craigo, Celia Labranche, David C Montefiori, Alan Landay, Cristian Apetrei, Ivona Pandrea
We compared and contrasted pathogenic (in pig-tailed macaques [PTMs]) and nonpathogenic (in African green monkeys [AGMs]) SIVsab infections to assess the significance of the B cell dysfunction observed in simian (SIV) and human immunodeficiency virus (HIV) infections. We report that the loss of B cells is specifically associated with the pathogenic SIV infection, while in the natural hosts, in which SIV is nonpathogenic, B cells rapidly increase in both lymph nodes (LNs) and intestine. SIV-associated B cell dysfunction associated with the pathogenic SIV infection is characterized by loss of naive B cells, loss of resting memory B cells due to their redistribution to the gut, increases of the activated B cells and circulating tissue-like memory B cells, and expansion of the B regulatory cells (Bregs)...
December 1, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28919171/immunomodulatory-mechanisms-of-mesenchymal-stem-cells-and-their-therapeutic-applications
#19
Don K Lee, Sun U Song
In the recent years, many studies have shown that MSCs must be stimulated by pro-inflammatory cytokines or other immune mediators before they can modulate immune cells in inflamed and damaged tissues. MSCs appear to be involved in inducing several regulatory immune cells, such as Tregs, Bregs, and regulatory NK cells. This new immune milieu created by MSCs may establish a tolerogenic environment that leads to an optimal condition for the treatment of immune diseases. The mechanisms of MSC action to treat immune disorders need to be further investigated in more detail...
September 11, 2017: Cellular Immunology
https://www.readbyqxmd.com/read/28901380/expression-of-cd19-cd24highcd38high-b-cells-il%C3%A2-10-and-il%C3%A2-10r-in-peripheral-blood-from-patients-with-systemic-lupus-erythematosus
#20
Tao Wang, Zhijun Li, Xingfu Li, Linjie Chen, Hao Zhao, Chao Jiang, Lijun Song
The present study aimed to examine the status and clinical significance of cluster of differentiation (CD) 19+CD24highCD38high regulatory B cells (Bregs), serum interleukin (IL)‑10, serum transforming growth factor (TGF)‑β and IL‑10 receptor (IL‑10R) expression in peripheral blood from patients with systemic lupus erythematosus (SLE). A total of 56 patients with SLE and 35 healthy individuals were recruited to the present study. The SLE disease activity index (SLEDAI) was calculated, and other laboratory parameters were measured...
November 2017: Molecular Medicine Reports
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