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https://www.readbyqxmd.com/read/28928810/characteristics-of-baff-and-april-factor-expression-in-multiple-myeloma-and-clinical-significance
#1
Jing Pan, Yuanyuan Sun, Ning Zhang, Jianming Li, Fangxin Ta, Wei Wei, Shanshan Yu, Limei Ai
The characteristics of the proliferation of B-cell activating factor (BAFF) and the proliferation-inducing ligand (APRIL) mRNA expression in mononuclear cell in multiple myeloma patients were detected, and the correlation was analyzed between the BAFF and APRIL concentrations in plasma and tumor burden parameters of multiple myeloma. Bone marrow samples from 60 patients with multiple myeloma and 20 healthy persons taken as controls, were collected. Bone marrow mononuclear cells (BMMCs) were harvested, and plasma was extracted...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28923901/maternal-serum-b-cell-activating-factor-levels-candidate-early-biomarker-for-hypertensive-disorders-of-pregnancy
#2
Hindi E Stohl, Richard H Lee, Joseph Manetta, Kristine Kikly, Lisa M Korst, William Stohl
Hypertensive disorders of pregnancy are a leading cause of maternal and perinatal morbidity and mortality. Early suppression of B-cell lymphopoiesis is necessary for a normal pregnancy. Dysregulation of factors critical to B-cell survival may result in pregnancy complications, including hypertension. In this prospective observational study at a single medical center, serum levels of BAFF (B-cell activating factor) were measured in pregnant participants at each trimester, at delivery, and postpartum and in nonpregnant controls at a single time point...
September 18, 2017: Hypertension
https://www.readbyqxmd.com/read/28923900/diagnosing-and-treating-hypertensive-disorders-of-pregnancy-the-answer-may-now-be-less-baff-ling
#3
EDITORIAL
Christopher T Chan, Maggie Lieu, Christopher G Sobey, Grant R Drummond, Antony Vinh
No abstract text is available yet for this article.
September 18, 2017: Hypertension
https://www.readbyqxmd.com/read/28921509/baff-augments-iga2-and-il-10-production-by-tlr7-8-stimulated-total-peripheral-blood-b-cells
#4
Gerco den Hartog, Thijs L J van Osch, Martijn Vos, Ben Meijer, Huub F J Savelkoul, R J Joost van Neerven, Sylvia Brugman
Class-switching of B cells to IgA can be induced via both T cell-dependent and T cell-independent mechanisms. IgA is most predominantly produced mucosally and is important for combating infections and allergies. In contrast to mice, humans have two forms of IgA; IgA1 and IgA2 with diverse tissue distribution. In early life, IgA levels might be sub-optimal especially during the fall season when bacterial and viral infections are more common. Therefore, we investigated using human B cells whether T cell-independent factors -promoting cell survival, class switching and immunoglobulin secretion- BAFF, APRIL, IL-10 and retinoic acid can boost IgA production in the context of viral or bacterial infection...
September 17, 2017: European Journal of Immunology
https://www.readbyqxmd.com/read/28918255/microglia-mediated-baff-baffr-ligation-promotes-neuronal-survival-in-brain-ischemia-injury
#5
Kai Li, Wei Yu, Rangjuan Cao, Zhihua Zhu, Guoqing Zhao
The innate immune responses of brain to vascular occlusion are primarily orchestrated by activated microglia. However, the roles of microglia in inflammatory responses to brain ischemic injuries are controversial. Here, we report a new mechanism by which microglia confer protective effects on ischemic neuronal cells. We found that under ischemic condition, the B-cell activating factor (BAFF) was vastly upregulated in microglia and this upregulation could at least be attributed to JAK-STAT signaling pathway activated by IFN-γ and IL-10, which were spatio-temporally enriched in I/R injured brain as well...
September 13, 2017: Neuroscience
https://www.readbyqxmd.com/read/28916716/deregulation-of-microrna-expression-in-purified-t-and-b-lymphocytes-from-patients-with-primary-sj%C3%A3-gren-s-syndrome
#6
Shu-Fang Wang-Renault, Saida Boudaoud, Gaétane Nocturne, Elodie Roche, Nelly Sigrist, Christian Daviaud, Andreas Bugge Tinggaard, Victor Renault, Jean-François Deleuze, Xavier Mariette, Jörg Tost
OBJECTIVE: MicroRNAs (miRNAs) play an important role in the pathogenesis of autoimmune diseases such as primary Sjögren's syndrome (pSS). This study is the first to investigate miRNA expression patterns in purified T and B lymphocytes from patients with pSS using a high-throughput quantitative PCR (qPCR) approach. METHODS: Two independent cohorts of both patients with pSS and controls, one for discovery and one for replication, were included in this study. CD4+ T cells and CD19+ B cells were isolated from peripheral blood mononuclear cells by magnetic microbeads and expression of miRNAs was profiled using the Exiqon Human miRNome panel I analysing 372 miRNAs...
September 15, 2017: Annals of the Rheumatic Diseases
https://www.readbyqxmd.com/read/28886017/b-cell-phenotype-and-igd-cd27-memory-b-cells-are-affected-by-tnf-inhibitors-and-tocilizumab-treatment-in-rheumatoid-arthritis
#7
Rita A Moura, Cláudia Quaresma, Ana R Vieira, Maria J Gonçalves, Joaquim Polido-Pereira, Vasco C Romão, Nádia Martins, Helena Canhão, João E Fonseca
BACKGROUND: The use of TNF-inhibitors and/or the IL-6 receptor antagonist, tocilizumab, in rheumatoid arthritis (RA) have pleiotropic effects that also involve circulating B-cells. The main goal of this study was to assess the effect of TNF-inhibitors and tocilizumab on B-cell phenotype and gene expression in RA. METHODS: Blood samples were collected from untreated early RA (ERA) patients, established RA patients under methotrexate treatment, established RA patients before and after treatment with TNF-inhibitors and tocilizumab, and healthy donors...
2017: PloS One
https://www.readbyqxmd.com/read/28867309/b-cell-activating-factor-baff-reflects-patients-immunological-risk-profile-after-kidney-transplantation
#8
A Schuster, B Jung, J Hofbauer, L Kühne, D Zecher, B Banas, T Bergler
The B-cell activating factor BAFF plays an important role in the development and maturation of B-lymphocytes, which can contribute to the generation of donor-specific antibodies and thus may influence graft function and graft survival. Inconsistent data on the role of BAFF levels after renal transplantation for the formation of donor-specific antibodies and the contribution for allograft rejection exist. The aim of the current study was to determine to what extent the degree of pre-immunization is reflected by each patient's BAFF levels before transplantation and in the follow-up...
August 31, 2017: Transplant Immunology
https://www.readbyqxmd.com/read/28865458/salutary-effects-of-glibenclamide-during-the-chronic-phase-of-murine-experimental-autoimmune-encephalomyelitis
#9
Volodymyr Gerzanich, Tapas K Makar, Poornachander Reddy Guda, Min Seong Kwon, Jesse A Stokum, Seung Kyoon Woo, Svetlana Ivanova, Alexander Ivanov, Rupal I Mehta, Alexandra Brooke Morris, Joseph Bryan, Christopher T Bever, J Marc Simard
BACKGROUND: In multiple sclerosis (MS) and experimental autoimmune encephalomyelitis (EAE), inflammation is perpetuated by both infiltrating leukocytes and astrocytes. Recent work implicated SUR1-TRPM4 channels, expressed mostly by astrocytes, in murine EAE. We tested the hypothesis that pharmacological inhibition of SUR1 during the chronic phase of EAE would be beneficial. METHODS: EAE was induced in mice using myelin oligodendrocyte glycoprotein (MOG) 35-55. Glibenclamide (10 μg/day) was administered beginning 12 or 24 days later...
September 2, 2017: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/28855265/the-role-of-baff-system-molecules-in-host-response-to-pathogens
#10
REVIEW
Jiro Sakai, Mustafa Akkoyunlu
The two ligands B cell-activating factor of the tumor necrosis factor family (BAFF) and a proliferation-inducing ligand (APRIL) and the three receptors BAFF receptor (BAFF-R), transmembrane activator and calcium-modulating cyclophilin ligand interactor (TACI), and B cell maturation antigen (BCMA) are members of the "BAFF system molecules." BAFF system molecules are primarily involved in B cell homeostasis. The relevance of BAFF system molecules in host responses to microbial assaults has been investigated in clinical studies and in mice deficient for each of these molecules...
October 2017: Clinical Microbiology Reviews
https://www.readbyqxmd.com/read/28844943/the-unknown-aspect-of-baff-inducing-il-35-production-by-a-cd5-cd1d-hi-fc%C3%AE-riib-hi-regulatory-b-cell-subset-in-lupus
#11
Yamin Zhang, Jun Li, Nuoya Zhou, Yi Zhang, Min Wu, Jian Xu, Chen Shen, Xiangjie An, Guanxin Shen, Ming Yang, Chun Zhang, Juan Tao
IL-35 is a critical immunosuppressive cytokine and plays an important role in various autoimmune diseases. The purpose of this study was to determine whether BAFF, a key pathogenic factor in SLE, also a dichotomous regulator for B cell immune responses, has an effect on IL-35-producing regulatory B cells and its underlying mechanisms in lupus. We found that exogenous BAFF could induce IL-35 production by splenic B cells from MRL-Fas(lpr/lpr) mice. BAFF-induced IL-35-producing B cells were mainly from MZ B cell subset and exhibited a CD5(+)CD1d(hi)FcγRIIb(hi) phenotype...
August 24, 2017: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/28838991/syk-inhibition-thwarts-the-baff-b-cell-receptor-crosstalk-and-thereby-antagonizes-mcl-1-in-chronic-lymphocytic-leukemia
#12
Cody Paiva, Taylor A Rowland, Bhargava Sreekantham, Claire Godbersen, Scott R Best, Prabhjot Kaur, Marc M Loriaux, Stephen E F Spurgeon, Olga V Danilova, Alexey V Danilov
Although small molecule inhibitors of B-cell receptor-associated kinases revolutionized therapy in chronic lymphocytic leukemia, they provide for incomplete responses. Pro-survival signaling emanating from the microenvironment may foster therapeutic resistance of the malignant B-cells resident in the protective lymphoid niches. BAFF is critical in survival of both healthy and neoplastic B-cells. However, the pro-survival pathways triggered by BAFF have not been fully characterized. Here we show that BAFF elicited resistance to spontaneous and drug-induced apoptosis in stromal co-cultures, induced activation of both canonical and non-canonical NFκB signaling pathways and triggered B-cell receptor signaling in chronic lymphocytic leukemia cells, independent of IGHV mutational status...
August 24, 2017: Haematologica
https://www.readbyqxmd.com/read/28834574/baff-and-baff-receptors-fakes-and-facts
#13
Gianfranco Ferraccioli, Elisa Gremese
The analysis of BAFF receptors before and after B cell depletion therapy (BCDT) might offer a clue to understand whether some B cell subsets, may represent useful biomarkers of biological and clinical response. Among the BAFF receptors, the AA have shown in a cohort of rheumatoid arthritis (RA) patients, by FACS analysis of the MFI (median fluorescence intensity) that TACI, and BCMA, do not change whereas BR3, the most important, appears to be decreased either before as well as after BCDT, in all B cells subsets but not in Plasmablasts, the subset more important and depleted by BCDT ...
August 23, 2017: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/28834165/a-gain-of-function-mutation-in-tnfrsf13b-is-a-candidate-for-predisposition-to-familial-or-sporadic-immune-thrombocytopenia
#14
Hong-Ling Peng, Yang Zhang, Nan-Nan Sun, Ya-Fei Yin, Ye-Wei Wang, Zhao Cheng, Wen-Zhe Yan, Su-Fang Liu, Yun-Xiao Xu, Xiang Xiao, Guang-Sen Zhang
BACKGROUND: Most immune thrombocytopenia (ITP) is sporadic but a positive family history of ITP in some patients suggests that hereditary forms exist. Due to the rarity of familial ITP families available for study and the heterogeneity of sporadic ITP, family linkage analysis or genome wide association studies are limited. OBJECTIVES: Based on one ITP pedigree, we try to identify the predisposing gene in familial or sporadic ITP and reveal the way in which it causes thrombocytopenia...
August 20, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28807996/klhl6-deficiency-impairs-transitional-b-cell-survival-and-differentiation
#15
Barbara Bertocci, Damiana Lecoeuche, Delphine Sterlin, Julius Kühn, Baptiste Gaillard, Annie De Smet, Frederique Lembo, Christine Bole-Feysot, Nicolas Cagnard, Tatiana Fadeev, Auriel Dahan, Jean-Claude Weill, Claude-Agnès Reynaud
Klhl6 belongs to the KLHL gene family, which is composed of an N-terminal BTB-POZ domain and four to six Kelch motifs in tandem. Several of these proteins function as adaptors of the Cullin3 E3 ubiquitin ligase complex. In this article, we report that Klhl6 deficiency induces, as previously described, a 2-fold reduction in mature B cells. However, we find that this deficit is centered on the inability of transitional type 1 B cells to survive and to progress toward the transitional type 2 B cell stage, whereas cells that have passed this step generate normal germinal centers (GCs) upon a T-dependent immune challenge...
August 14, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28800164/b-cell-phenotypes-in-patients-with-rheumatoid-arthritis-relapsing-after-rituximab-expression-of-b-cell-activating-factor-binding-receptors-on-b-cell-subsets
#16
Elena Becerra, Inmaculada De La Torre, Maria J Leandro, Geraldine Cambridge
OBJECTIVES: Serum levels of B cell activating factor (BAFF) rise following Rituximab (RTX) therapy in patients with Rheumatoid arthritis (RA). Initiation of naïve B cell return to the periphery and autoreactive B cell expansion leading to relapse after RTX may therefore be linked to interactions between BAFF and BAFF-binding receptors (BBR). METHODS: Relationships between serum BAFF and BBR expression (BAFFR, TACI and BCMA) were determined on B cell subsets, defined using IgD/CD38...
August 11, 2017: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/28796281/changes-in-protein-serum-levels-during-stem-cell-transplantation
#17
Elisabetta Metafuni, Sabrina Giammarco, Daniela Giovanna De Ritis, Monica Rossi, Francesco Corrente, Nicola Piccirillo, Andrea Paolo Bacigalupo, Simona Sica, Patrizia Chiusolo
BACKGROUND: GvHD is one of the major complication after stem cell transplantation affecting transplant-related mortality. Throughout the last years, many serum proteins were been proposed as possible biomarkers for GvHD. AIMS: We studied the trend of five of the most studied serum proteins to evaluate if a correlation exists between proteins concentration and post-HSCT outcomes. MATERIALS AND METHODS: We measured serum concentration of REG3α, ST2, BAFF, CXCL9 and elafin in a cohort of 77 patients submitted to HSCT in our department...
August 10, 2017: European Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28774562/defective-anti-polysaccharide-igg-vaccine-responses-in-iga-deficient-mice
#18
Yoichi Furuya, Girish S Kirimanjeswara, Sean Roberts, Rachael Racine, Jennifer Wilson-Welder, Alan M Sanfilippo, Sharon L Salmon, Dennis W Metzger
We report that IgA(-/-) mice exhibit specific defects in IgG antibody responses to various polysaccharide vaccines (Francisella tularensis LPS and Pneumovax), but not protein vaccines such as Fluzone. This defect further included responses to polysaccharide-protein conjugate vaccines (Prevnar and Haemophilus influenzae type b-tetanus toxoid vaccine). In agreement with these findings, IgA(-/-) mice were protected from pathogen challenge with protein- but not polysaccharide-based vaccines. Interestingly, after immunization with live bacteria, IgA(+/+) and IgA(-/-) mice were both resistant to lethal challenge and their IgG anti-polysaccharide antibody responses were comparable...
July 31, 2017: Vaccine
https://www.readbyqxmd.com/read/28752968/-effects-of-triptolide-on-the-autophagy-in-synovial-spleen-and-thymus-of-rats-with-adjuvant-arthritis
#19
Lei Wan, Jian Liu, Chuan-Bing Huang, Xiao-Jun Zhang, Ya-Li Wang, Ping-Heng Zhang, Yue Sun, Lei Liu
OBJECTIVE: To determine the effect of triptolide (TP) on the expression of ATG /LC3-Ⅱ Beclin1 in synovial, spleen, and thymusof rats with adjuvant arthritis (AA). METHODS: Rats were divided for four groups: normal control (NC), model control (MC), leflunomide (LEF) treatment, and triptolide (TP)treatment, with 12 rats in each group.The AA model was established through Freund's complete adjuvant (0.1 mL each) injection into the right foot plantar skin to introduce inflammation and 10 days of tail root injection of 0...
July 2017: Sichuan da Xue Xue Bao. Yi Xue Ban, Journal of Sichuan University. Medical Science Edition
https://www.readbyqxmd.com/read/28747345/ormdl3-facilitates-the-survival-of-splenic-b-cells-via-an-atf6%C3%AE-endoplasmic-reticulum-stress-beclin1-autophagy-regulatory-pathway
#20
Jie Dang, Xianli Bian, Xiaochun Ma, Jiangxia Li, Feng Long, Shan Shan, Qianqian Yuan, Qian Xin, Yan Li, Fei Gao, Yaoqin Gong, Qiji Liu
The genetic association of orosomucoid-like 3 (ORMDL3) with an array of immunoinflammatory disorders has been recently unraveled in multiple ethnic groups, and functional exploration has received attention of the particular relevance of this gene in endoplasmic reticulum stress, lipid metabolism, and inflammatory response. In this study, we demonstrated the upregulation of ORMDL3 in both patients with systemic lupus erythematosus and lupus mice compared with controls. By establishing ORMDL3 knockout mice (Ormdl3(-/-)), we showed that silencing Ormdl3 in vivo significantly decreased the proportions of mature B lymphocytes and transitional 2B cells in spleen and B1a cells from abdominal cavity perfusion fluid, the secretion of IgG and IgM, and the expression of Baff...
July 26, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
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