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https://www.readbyqxmd.com/read/28646220/angiotensin-ii-synergizes-with-baff-to-promote-atheroprotective-regulatory-b-cells
#1
Padmapriya Ponnuswamy, Jeremie Joffre, Olivier Herbin, Bruno Esposito, Ludivine Laurans, Christoph J Binder, Thomas F Tedder, Lynda Zeboudj, Xavier Loyer, Andreas Giraud, Yujiao Zhang, Alain Tedgui, Ziad Mallat, Hafid Ait-Oufella
Angiotensin II (AngII) promotes hypertension, atherogenesis, vascular aneurysm and impairs post-ischemic cardiac remodeling through concerted roles on vascular cells, monocytes and T lymphocytes. However, the role of AngII in B lymphocyte responses is largely unexplored. Here, we show that chronic B cell depletion (Baffr deficiency) significantly reduces atherosclerosis in Apoe (-/-) mice infused with AngII. While adoptive transfer of B cells in Apoe (-/-) /Baffr (-/-) mice reversed atheroprotection in the absence of AngII, infusion of AngII in B cell replenished Apoe (-/-) /Baffr (-/-) mice unexpectedly prevented the progression of atherosclerosis...
June 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28630652/verification-of-b-lymphocyte-activating-factor-s-involvement-in-the-exacerbation-of-insulin-resistance-as-well-as-an-autoimmune-response-in-patients-with-nonalcoholic-steatohepatitis-and-patients-with-hcv-related-chronic-liver-disease
#2
Takashi Himoto, Koji Fujita, Takako Nomura, Joji Tani, Asahiro Morishita, Hirohito Yoneyama, Reiji Haba, Tsutomu Masaki
BACKGROUND: Ten to forty percent of nonalcoholic steatohepatitis (NASH) and HCV-related chronic liver disease (CLD-C) patients have antinuclear antibodies (ANAs). However, the relationship between autoimmune response and insulin resistance remains uncertain among those patients. The primary purpose of this study was to investigate whether or not ANA status was associated with the development of insulin resistance and obesity in NASH and CLD-C patients. METHODS: Degrees of hepatic fibrosis and steatosis were evaluated by the classification proposed by Brunt et al...
2017: Diabetology & Metabolic Syndrome
https://www.readbyqxmd.com/read/28627389/association-of-genetic-variation-in-b-cell-activating-factor-with-chronic-hepatitis-b-virus-infection
#3
Qunying Han, Cuiling Yang, Na Li, Fang Li, Jiao Sang, Yi Lv, Wenxuan Zhao, Chunyan Li, Zhengwen Liu
The outcome of hepatitis B virus (HBV) infection is considered to be related to the host immunogenetic susceptibility. B cell activating factor (BAFF) is involved in both B cell and T cell mediated immunity and its circulating levels were shown to be significantly elevated in HBV-related liver diseases. This study examined BAFF rs9514828 and rs12583006 polymorphisms in 386 patients with various liver diseases related to chronic HBV infection, 69 HBV infection resolvers, and 191 healthy controls. Both rs9514828 and rs12583006 polymorphisms and serum BAFF levels were determined in 232 patients with chronic HBV infection, and 61 healthy controls...
June 13, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28624489/association-of-genetic-polymorphisms-of-macrophage-inhibitory-factor-mif-and-b-cell-activating-factor-baff-with-the-detection-of-donor-specific-antibodies-in-kidney-allograft-recipients
#4
Youngil Chang, Tariq Shah, David I Min
The posttransplant development of donor specific antibodies (DSA) initiates the antibody mediated rejection (AMR), which is associated with the increased rate of graft loss. One of the characteristics of AMR is the infiltration of innate immune system including macrophages, monocytes, neutrophils or NK cells. Macrophage inhibitory factor (MIF) and B-cell activating factor (BAFF) are well known cytokines that are associated with the activation of the innate immune system which can damage kidney allograft. In this article, the association of the genetic polymorphisms of MIF and BAFF with the development of DSA including Class I and II in kidney transplant patients is investigated...
June 14, 2017: Human Immunology
https://www.readbyqxmd.com/read/28621764/neuroimmunology-b-cells-and-variant-baff-in-autoimmune-disease
#5
Manuel Comabella
No abstract text is available yet for this article.
June 16, 2017: Nature Reviews. Neurology
https://www.readbyqxmd.com/read/28615729/systemic-lupus-erytheumatosus-baff-emerges-from-the-genetic-shadows
#6
William Stohl
No abstract text is available yet for this article.
June 15, 2017: Nature Reviews. Rheumatology
https://www.readbyqxmd.com/read/28589354/crispr-cas9-mediated-in-vitro-mutagenesis-in-gc-like-b-cells
#7
Van Trung Chu, Robin Graf, Klaus Rajewsky
The CRISPR/Cas9 technology has developed into a powerful tool for genome editing, both in terms of gene silencing and the insertion of precise mutations. However, the application of CRISPR/Cas9-mediated mutagenesis in primary immune cells, in particular in B cells, is still in its infancy because of the difficulty to deliver the CRISPR/Cas9 system into these cells. Here, we describe a new method to use CRISPR/Cas9 for manipulating genes in germinal center (GC)-like B cells in vitro. We isolated Cas9-expressing B cells from R26-Cas9iGFP/+ mice (expressing Cas9 constitutively from the Rosa26 locus) and mixed them with control B cells...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28583852/b-cell-activating-factor-deficiency-suppresses-splenomegaly-during-leishmania-donovani-infection
#8
Satoko Omachi, Wataru Fujii, Natsuho Azuma, Ayako Morimoto, Chizu Sanjoba, Yoshitsugu Matsumoto, Yasuyuki Goto
B-cell activating factor (BAFF) is a critical regulator for B-cell development and differentiation. We previously reported elevation of serum BAFF levels in patients with visceral leishmaniasis (VL). In this study, we examined if BAFF is involved in pathologies during infection of Leishmania donovani. BALB/cA mice infected with L. donovani showed significant elevation in serum BAFF and IgG levels as seen in VL patients. In contrast, elevation of serum IgG by L. donovani infection was significantly suppressed in BAFF-deficient mice...
June 3, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28572616/comparison-of-non-invasive-biomarkers-faecal-baff-calprotectin-and-fobt-in-discriminating-ibs-from-ibd-and-evaluation-of-intestinal-inflammation
#9
Yu Fu, Lingli Wang, Cheng Xie, Kaifang Zou, Lei Tu, Wei Yan, Xiaohua Hou
Faecal calprotectin and faecal occult blood test (FOBT) were widely used in the diagnosis and assessment of intestinal inflammation in inflammatory bowel disease (IBD). Recently we identified an excellent new biomarker B cell-activating factor (BAFF) for IBD. Here in this study we compared the efficacy of faecal BAFF, calprotectin and FOBT to find the "best non-invasive marker". Results showed that for discriminating IBD from IBS, BAFF ≥227.3 pg/ml yield 84% sensitivity, 100% specificity, 100% positive predictive value (PPV) and 64% negative predictive value (NPV) while calprotectin ≥50 µg/g yield 76% sensitivity, 93% specificity, 97% PPV and 53% NPV...
June 1, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28550073/lymphocyte-antigens-targetable-by-monoclonal-antibodies-in-non-systemic-vasculitic-neuropathy
#10
Christian Schneider, Gilbert Wunderlich, Johannes Bleistein, Gereon R Fink, Martina Deckert, Anna Brunn, Helmar Christoph Lehmann
OBJECTIVE: To identify the most relevant antigens for monoclonal antibodies in lymphocytic infiltrates in non-systemic vasculitic neuropathy (NSVN). BACKGROUND: Current immunosuppressive treatment for NSVN is insufficient. Monoclonal antibodies might be a treatment option, but the expression profile for targetable antigens on lymphocytic infiltrates in NSVN is unknown. METHODS: Sural nerve biopsies from a cohort of patients with NSVN were immunohistochemically studied for the expression of potential candidate antigens in perivascular and intramural lymphocytic infiltrates and correlated with neurological and electrophysiological parameters...
May 26, 2017: Journal of Neurology, Neurosurgery, and Psychiatry
https://www.readbyqxmd.com/read/28539551/suppression-of-gpi-induced-arthritis-by-oral-administration-of-transgenic-rice-seeds-expressing-altered-peptide-ligands
#11
Tomoya Hirota, Hiroto Tsuboi, Hiroyuki Takahashi, Hiromitsu Asashima, Masaru Ohta, Yuhya Wakasa, Isao Matsumoto, Fumio Takaiwa, Takayuki Sumida
OBJECTIVE: To investigate the effects and mechanisms of transgenic rice seeds expressing the altered peptide ligand (APL) of human glucose-6-phosphate-isomerase (hGPI325-339) in mice model of GPI induced arthritis (GIA). METHODS: We generated transgenic rice expressing APL12 which was analog peptide of hGPI325-339. The transgenic rice seeds were orally administered prophylactically before the induction of GIA. The severity of arthritis and titers of serum anti-GPI antibodies were evaluated...
2017: Nihon Rinshō Men'eki Gakkai Kaishi, Japanese Journal of Clinical Immunology
https://www.readbyqxmd.com/read/28521029/soluble-taci-and-soluble-bcma-as-biomarkers-in-primary-central-nervous-system-lymphoma
#12
Franziska S Thaler, Sarah A Laurent, Marion Huber, Matthias Mulazzani, Martin Dreyling, Uwe Ködel, Tania Kümpfel, Andreas Straube, Edgar Meinl, Louisa von Baumgarten
Background: B-cell survival is regulated through interactions of B-cell-activating factor (BAFF) and a proliferation-inducing ligand (APRIL) with their receptors transmembrane activator and CAML interactor (TACI) and B-cell maturation antigen (BCMA). We evaluated the diagnostic potential of soluble TACI (sTACI) and soluble BCMA (sBCMA) in cerebrospinal fluid (CSF) and serum as biomarkers in primary CNS lymphoma (PCNSL). Methods: CSF (n=176) and serum samples (n=105) from patients with clinically or radiologically suspected PCNSL as well as from control patients were collected prospectively...
May 17, 2017: Neuro-oncology
https://www.readbyqxmd.com/read/28487087/recurrent-respiratory-tract-infections-rrti-in-the-elderly-a-late-onset-mild-immunodeficiency
#13
Esther van de Vosse, Monique M van Ostaijen-Ten Dam, René Vermaire, Els M Verhard, Jacqueline L Waaijer, Jaap A Bakker, Sandra T Bernards, Hermann Eibel, Maarten J van Tol, Jaap T van Dissel, Margje H Haverkamp
Elderly with late-onset recurrent respiratory tract infections (RRTI) often have specific anti-polysaccharide antibody deficiency (SPAD). We hypothesized that late-onset RRTI is caused by mild immunodeficiencies, such as SPAD, that remain hidden through adult life. We analyzed seventeen elderly RRTI patients and matched controls. We determined lymphocyte subsets, expression of BAFF receptors, serum immunoglobulins, complement pathways, Pneumovax-23 vaccination response and genetic variations in BAFFR and MBL2...
July 2017: Clinical Immunology: the Official Journal of the Clinical Immunology Society
https://www.readbyqxmd.com/read/28485798/immune-complexes-induce-tnf-%C3%AE-and-baff-production-from-u937-cells-by-hmgb1-and-rage
#14
X-J Gao, Y-Y Qu, X-W Liu, M Zhu, C-Y Ma, Y-L Jiao, B Cui, Z-J Chen, Y-R Zhao
OBJECTIVE: This study investigated the effects of immune complexes (ICs) on tumor necrosis factor α (TNF-α) and B cell-activating factor (BAFF) production from U937 cells and further explored the mechanism. MATERIALS AND METHODS: U937 cells were incubated with necrosis supernatant or systemic lupus erythematosus (SLE) sera alone, or their combination. The expression of TNF-α and BAFF was determined by Real-time polymerase chain reaction and enzyme-linked immunosorbent assay...
April 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28481353/b-cell-activating-factor-baff-plasma-level-at-the-time-of-chronic-gvhd-diagnosis-is-a-potential-predictor-of-non-relapse-mortality
#15
R M Saliba, S Sarantopoulos, C L Kitko, A Pawarode, S C Goldstein, J Magenau, A M Alousi, T Churay, H Justman, S Paczesny, P Reddy, D R Couriel
Biological markers for risk stratification of chronic GvHD (cGvHD) could improve the care of patients undergoing allogeneic hematopoietic stem cell transplantation. Increased plasma levels of B-cell activating factor (BAFF), chemokine (C-X-C motif) ligand 9 (CXCL9) and elafin have been associated with the diagnosis, but not with outcome in patients with cGvHD. We evaluated the association between levels of these soluble proteins, measured by ELISA at the time of cGvHD diagnosis and before the initiation of therapy, with non-relapse-mortality (NRM)...
May 8, 2017: Bone Marrow Transplantation
https://www.readbyqxmd.com/read/28469828/sjogren-s-syndrome-review-of-the-aetiology-pathophysiology-potential-therapeutic-interventions
#16
REVIEW
Jisha J Nair, Tejas P Singh
BACKGROUND: Sjogren's syndrome (SS) is an autoimmune disorder characterised by lymphocytic infiltration of exocrine glands, resulting in glandular dysfunction. Objectives: This study aims to review the aetiology of Sjogren's syndrome, highlight aspects that contribute to the pathophysiology of the disease and explore treatment options that target different mediators of pathogenesis. MATERIAL AND METHODS: The MEDLINE/PubMed and Google Scholar databases were searched systematically with the terms "Sjogren's syndrome"; "clinical"; "treatment"; "management"...
April 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28463395/clinical-relevance-of-circulating-anti-ena-and-anti-dsdna-secreting-cells-from-sle-patients-and-their-dependence-on-stat-3-activation
#17
Raquel de la Varga Martínez, Beatriz Rodríguez-Bayona, Gustavo A Añez, Fermín Medina Varo, José J Pérez Venegas, José A Brieva, Carmen Rodríguez
Disturbances of plasma cell homeostasis and auto-antibody production are hallmarks of systemic lupus erythematosus. The aim of this study was to explore the presence of circulating anti-ENA and anti-dsDNA antibody-secreting cells, to determine their dependence on plasma cell-niche cytokines and to analyze their clinical value. The study was performed in SLE patients with serum anti-ENA and/or anti-dsDNA antibodies (n = 57). Enriched B-cell fractions and sorted antibody-secreting cells (CD19(low) CD38(high) ) were obtained from blood...
May 2, 2017: European Journal of Immunology
https://www.readbyqxmd.com/read/28459817/modulation-of-mycobacterium-tuberculosis-specific-humoral-immune-responses-is-associated-with-strongyloides-stercoralis-co-infection
#18
Rajamanickam Anuradha, Saravanan Munisankar, Yukti Bhootra, Chandrakumar Dolla, Paul Kumaran, Thomas B Nutman, Subash Babu
BACKGROUND / OBJECTIVES: Helminth infections are known to influence T cell responses in latent tuberculosis (LTBI). Whether helminth infections also modulate B cell responses in helminth-tuberculosis co-infection is not known. METHODS: We assessed Mycobacterium tuberculosis (Mtb)-antigen specific IgM and IgG levels, circulating levels of the B cell growth factors, BAFF and APRIL and the absolute numbers of the various B cell subsets in individuals with LTBI, LTBI with coincident Strongyloides stercoralis (Ss) infection (LTBI/Ss) and in those with Ss infection alone (Ss)...
May 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28445677/overexpression-of-the-cytokine-baff-and-autoimmunity-risk
#19
Maristella Steri, Valeria Orrù, M Laura Idda, Maristella Pitzalis, Mauro Pala, Ilenia Zara, Carlo Sidore, Valeria Faà, Matteo Floris, Manila Deiana, Isadora Asunis, Eleonora Porcu, Antonella Mulas, Maria G Piras, Monia Lobina, Sandra Lai, Mara Marongiu, Valentina Serra, Michele Marongiu, Gabriella Sole, Fabio Busonero, Andrea Maschio, Roberto Cusano, Gianmauro Cuccuru, Francesca Deidda, Fausto Poddie, Gabriele Farina, Mariano Dei, Francesca Virdis, Stefania Olla, Maria A Satta, Mario Pani, Alessandro Delitala, Eleonora Cocco, Jessica Frau, Giancarlo Coghe, Lorena Lorefice, Giuseppe Fenu, Paola Ferrigno, Maria Ban, Nadia Barizzone, Maurizio Leone, Franca R Guerini, Matteo Piga, Davide Firinu, Ingrid Kockum, Izaura Lima Bomfim, Tomas Olsson, Lars Alfredsson, Ana Suarez, Patricia E Carreira, Maria J Castillo-Palma, Joseph H Marcus, Mauro Congia, Andrea Angius, Maurizio Melis, Antonio Gonzalez, Marta E Alarcón Riquelme, Berta M da Silva, Maurizio Marchini, Maria G Danieli, Stefano Del Giacco, Alessandro Mathieu, Antonello Pani, Stephen B Montgomery, Giulio Rosati, Jan Hillert, Stephen Sawcer, Sandra D'Alfonso, John A Todd, John Novembre, Gonçalo R Abecasis, Michael B Whalen, Maria G Marrosu, Alessandra Meloni, Serena Sanna, Myriam Gorospe, David Schlessinger, Edoardo Fiorillo, Magdalena Zoledziewska, Francesco Cucca
BACKGROUND: Genomewide association studies of autoimmune diseases have mapped hundreds of susceptibility regions in the genome. However, only for a few association signals has the causal gene been identified, and for even fewer have the causal variant and underlying mechanism been defined. Coincident associations of DNA variants affecting both the risk of autoimmune disease and quantitative immune variables provide an informative route to explore disease mechanisms and drug-targetable pathways...
April 27, 2017: New England Journal of Medicine
https://www.readbyqxmd.com/read/28442365/b-cell-activating-factor-regulates-the-survival-of-b-lymphocytes-infected-with-human-cytomegalovirus
#20
Haiyan Xu, Panpan Dong, Xuyi Ma, Dan Song, Dong Xue, Renfang Xu, Hao Lu, Xiaozhou He
BACKGROUND: Previous studies have suggested that B lymphocytes can be polyclonally activated by human cytomegalovirus (HCMV), and individuals infected by HCMV exhibit characteristic features of an autoimmunity disease. B cell-activating factor (BAFF) plays important roles in the survival and differentiation of B cells; however, few studies have examined the potential role of BAFF on B cells infected by HCMV. METHODS: HCMV virus strain (HCMV AD-169) was concentrated by normal methods and used to infect microbead-purified tonsil CD19+ B cells...
April 23, 2017: Immunology Letters
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