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https://www.readbyqxmd.com/read/28087671/induction-and-differentiation-of-il-10-producing-regulatory-b-cells-from-healthy-blood-donors-and-rheumatoid-arthritis-patients
#1
Zsuzsanna Bankó, Judit Pozsgay, Dániel Szili, Mária Tóth, Tamás Gáti, György Nagy, Bernadette Rojkovich, Gabriella Sármay
The most important feature of B cells is the production of Abs upon activation; additionally, B cells produce pro- and anti-inflammatory cytokines in response to certain stimuli. IL-10-producing B cells represent a major subset of regulatory B cells (Bregs) that suppress autoimmune and inflammatory responses. B cells play a crucial role in the development and maintenance of the chronic inflammatory autoimmune disease rheumatoid arthritis (RA); however, controversial data are available on IL-10- producing Bregs in RA...
January 13, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28086979/b-cell-repertoires-in-hla-sensitized-kidney-transplant-candidates-undergoing-desensitization-therapy
#2
John F Beausang, H Christina Fan, Rene Sit, Maria U Hutchins, Kshama Jirage, Rachael Curtis, Edward Hutchins, Stephen R Quake, Julie M Yabu
BACKGROUND: Kidney transplantation is the most effective treatment for end-stage renal disease. Sensitization refers to pre-existing antibodies against human leukocyte antigen (HLA) protein and remains a major barrier to successful transplantation. Despite implementation of desensitization strategies, many candidates fail to respond. Our objective was to determine whether measuring B cell repertoires could differentiate candidates that respond to desensitization therapy. METHODS: We developed an assay based on high-throughput DNA sequencing of the variable domain of the heavy chain of immunoglobulin genes to measure changes in B cell repertoires in 19 highly HLA-sensitized kidney transplant candidates undergoing desensitization and 7 controls with low to moderate HLA sensitization levels...
January 13, 2017: Journal of Translational Medicine
https://www.readbyqxmd.com/read/28057674/plasma-cell-neoplasm-with-plasmablastic-morphology-mimicking-acute-leukemia
#3
Maryam Pourabdollah, Hong Chang
No abstract text is available yet for this article.
January 5, 2017: Blood
https://www.readbyqxmd.com/read/28053999/b-cell-populations-discriminate-between-pediatric-and-adult-onset-multiple-sclerosis
#4
Alexander Schwarz, Bettina Balint, Mirjam Korporal-Kuhnke, Sven Jarius, Kathrin von Engelhardt, Alexandra Fürwentsches, Cornelia Bussmann, Friedrich Ebinger, Brigitte Wildemann, Jürgen Haas
OBJECTIVE: To comparatively assess the B-cell composition in blood and CSF of patients with pediatric-onset multiple sclerosis (pedMS) and adult-onset multiple sclerosis (adMS). METHODS: In this cross-sectional study, we obtained blood and CSF samples from 25 patients with pedMS (8-18 years) and 40 patients with adMS (23-65 years) and blood specimens from 66 controls (1-55 years). By using multicolor flow cytometry, we identified naive, transitional, isotype class-switched memory, nonswitched memory, and double-negative memory B-cell subsets as well as plasmablasts (PB) and terminally differentiated plasma cells (PC)...
January 2017: Neurology® Neuroimmunology & Neuroinflammation
https://www.readbyqxmd.com/read/28052118/tgf-%C3%AE-3-inhibits-antibody-production-by-human-b-cells
#5
Yumi Tsuchida, Shuji Sumitomo, Kazuyoshi Ishigaki, Akari Suzuki, Yuta Kochi, Haruka Tsuchiya, Mineto Ota, Toshihiko Komai, Mariko Inoue, Kaoru Morita, Tomohisa Okamura, Kazuhiko Yamamoto, Keishi Fujio
TGF-β is a pleotropic cytokine involved in various biological processes. Of the three isoforms of TGF-β, TGF-β1 has long been recognized as an important inhibitory cytokine in the immune system and has been reported to inhibit B cell function in both mice and humans. Recently, it has been suggested that TGF-β3 may play an important role in the regulation of immune system in mice. Murine CD4+CD25-LAG3+ regulatory T cells suppress B cell function through the production of TGF-β3, and it has been reported that TGF-β3 is therapeutic in a mouse model of systemic lupus erythematosus...
2017: PloS One
https://www.readbyqxmd.com/read/28039305/effect-of-antiretroviral-therapy-on-the-memory-and-activation-profiles-of-b-cells-in-hiv-infected-african-women
#6
Ramla F Tanko, Andreia P Soares, Tracey L Müller, Nigel J Garrett, Natasha Samsunder, Quarraisha Abdool Karim, Salim S Abdool Karim, Catherine Riou, Wendy A Burgers
Human immunodeficiency virus infection induces a wide range of effects in B cells, including skewed memory cell differentiation, compromised B cell function, and hypergammaglobulinemia. However, data on the extent to which these B cell abnormalities can be reversed by antiretroviral therapy (ART) are limited. To investigate the effect of ART on B cells, the activation (CD86) and differentiation (IgD, CD27, and CD38) profiles of B cells were measured longitudinally in 19 HIV-infected individuals before (median, 2 mo) and after ART initiation (median, 12 mo) and compared with 19 age-matched HIV-uninfected individuals using flow cytometry...
December 30, 2016: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28031339/staphylococcus-aureus-protein-a-disrupts-immunity-mediated-by-long-lived-plasma-cells
#7
Amanda B Keener, Lance T Thurlow, SunAh Kang, Nicholas A Spidale, Stephen H Clarke, Kenji M Cunnion, Roland Tisch, Anthony R Richardson, Barbara J Vilen
Infection with Staphylococcus aureus does not induce long-lived protective immunity for reasons that are not completely understood. Human and murine vaccine studies support a role for Abs in protecting against recurring infections, but S. aureus modulates the B cell response through expression of staphylococcus protein A (SpA), a surface protein that drives polyclonal B cell expansion and induces cell death in the absence of costimulation. In this murine study, we show that SpA altered the fate of plasmablasts and plasma cells (PCs) by enhancing the short-lived extrafollicular response and reducing the pool of bone marrow (BM)-resident long-lived PCs...
December 28, 2016: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28031174/clinical-characteristics-and-prognostic-factors-of-plasmablastic-lymphoma-patients-analysis-of-135-patients-from-the-lysa-group
#8
E Tchernonog, P Faurie, P Coppo, H Monjanel, A Bonnet, M Algarte Génin, M Mercier, J Dupuis, F Bijou, C Herbaux, A Delmer, B Fabiani, C Besson, S Le Gouill, E Gyan, C Laurent, H Ghesquieres, G Cartron
BACKGROUND: Plasmablastic lymphoma (PBL), initially described in 1997 in the oral cavity of HIV positive patients, is now recognized as a distinct aggressive and rare entity of diffuse large B-cells lymphoma (DLBCL) by the WHO (World Health Organization) classification. Since the original description, others cases have been reported. However, these are largely derived from case reports or small series limiting any definitive conclusions on clinical characteristics and outcome. PATIENTS AND METHODS: The clinical, biological, pathological features and outcome of a cohort including 135 patients with PBL, from LYSA centers in France and Belgium, were reported and analyzed...
December 28, 2016: Annals of Oncology: Official Journal of the European Society for Medical Oncology
https://www.readbyqxmd.com/read/28017425/vaccination-of-rhesus-macaques-with-the-live-attenuated-hsv-1-vaccine-vc2-stimulates-the-proliferation-of-mucosal-t-cells-and-germinal-center-responses-resulting-in-sustained-production-of-highly-neutralizing-antibodies
#9
Brent A Stanfield, Bapi Pahar, Vladimir N Chouljenko, Ronald Veazey, Konstantin G Kousoulas
We have shown that the live-attenuated HSV-1 VC2 vaccine strain with mutations in glycoprotein K (gK) and the membrane protein UL20 is unable to establish latency in vaccinated animals and produces a robust immune response capable of completely protecting mice against lethal vaginal HSV-1 or HSV-2 infections. To better understand the immune response generated by vaccination with VC2, we tested its ability to elicit immune responses in rhesus macaques. Vaccinated animals showed no signs of disease and developed increasing HSV-1 and HSV-2 reactive IgG1 after two booster vaccinations, while IgG subtypes IgG2 and IgG3 remained at low to undetectable levels...
December 22, 2016: Vaccine
https://www.readbyqxmd.com/read/28013535/human-herpes-virus-8-hhv-8-epstein-barr-virus-ebv-copositive-plasmablastic-microlymphoma-arising-in-multicentric-castleman-s-disease-mcd-of-an-immunocompetent-patient
#10
Yong-Moon Lee, Jin-Man Kim, Sam-Yong Kim
No abstract text is available yet for this article.
December 24, 2016: Journal of Pathology and Translational Medicine
https://www.readbyqxmd.com/read/28011983/refractory-plasmablastic-lymphoma-a-review-of-treatment-options-beyond-standard-therapy
#11
REVIEW
Dominik Pretscher, Alexander Kalisch, Martin Wilhelm, Josef Birkmann
Plasmablastic lymphoma (PBL) is a rare distinct subtype of aggressive diffuse large B-cell lymphoma and a notoriously hard to treat entity with a dismal prognosis in both HIV-negative and HIV-positive patients. Clinicians often face the question of second or third line treatment. As the treatment options with novel agents in lymphomas are rapidly evolving, more and more options beyond standard chemotherapy are available. In connection with a review of treatment options with novel lymphoma agents, we present a case report of a patient with a complete remission after the administration of brentuximab vedotin and lenalidomide...
December 23, 2016: Annals of Hematology
https://www.readbyqxmd.com/read/28011866/the-aryl-hydrocarbon-receptor-controls-cell-fate-decisions-in-b-cells
#12
Bharat Vaidyanathan, Ashutosh Chaudhry, William T Yewdell, Davide Angeletti, Wei-Feng Yen, Adam K Wheatley, Christopher A Bradfield, Adrian B McDermott, Jonathan W Yewdell, Alexander Y Rudensky, Jayanta Chaudhuri
Generation of cellular heterogeneity is an essential feature of the adaptive immune system. This is best exemplified during humoral immune response when an expanding B cell clone assumes multiple cell fates, including class-switched B cells, antibody-secreting plasma cells, and memory B cells. Although each cell type is essential for immunity, their generation must be exquisitely controlled because a class-switched B cell cannot revert back to the parent isotype, and a terminally differentiated plasma cell cannot contribute to the memory pool...
January 2017: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/28011187/mucosal-associated-invariant-t-cells-are-depleted-and-functionally-altered-in-patients-with-common-variable-immunodeficiency
#13
Serena Arduini, Jean Dunne, Niall Conlon, Conleth Feighery, Derek G Doherty
Common variable immunodeficiency (CVID) is a primary immunoglobulin deficiency characterized by recurrent infections and complications, including autoimmunity, enteropathy, polyclonal lymphocytic infiltration or lymphoid malignancy. Innate T cells can support B cell maturation and antibody production. We investigated the numbers, phenotypes and functions of circulating B cell, γδ T cell, invariant natural killer T (iNKT) cell and mucosal-associated invariant T (MAIT) cell subsets in 23 CVID patients and 27 healthy controls...
December 20, 2016: Clinical Immunology: the Official Journal of the Clinical Immunology Society
https://www.readbyqxmd.com/read/28001444/vitamin-d-receptor-expression-in-plasmablastic-lymphoma-and-myeloma-cells-confers-susceptibility-to-vitamin-d
#14
Duncan M Gascoyne, Linden Lyne, Hayley Spearman, Francesca M Buffa, Elizabeth J Soilleux, Alison H Banham
Plasmablastic B-cell malignancies include plasmablastic lymphoma and subsets of multiple myeloma and diffuse large B-cell lymphoma (DLBCL). These diseases can be difficult to diagnose and treat, and lack well-characterised cell line models. Here, immunophenotyping and FOXP1 expression profiling identified plasmablastic characteristics in DLBCL cell lines HLY-1 and SU-DHL-9, associated with CTNNAL1, HPGD, RORα, IGF1 and/or vitamin D receptor (VDR) transcription. We demonstrated VDR protein expression in primary plasmablastic tumour cells, and confirmed in cell lines expression of both VDR and the metabolic enzyme CYP27B1, which catalyses active vitamin D3 production...
December 21, 2016: Endocrinology
https://www.readbyqxmd.com/read/28000955/chronic-airway-inflammation-provides-a-unique-environment-for-b-cell-activation-and-antibody-production
#15
Scott Feldman, Richard Kasjanski, Julie Popowski, David Hernandez, Jason Chen, James E Norton, Lydia Suh, Roderick G Carter, Whitney W Stevens, Anju T Peters, Robert C Kern, David B Conley, Bruce K Tan, Stephani Shintani-Smith, Kevin C Welch, Leslie C Grammer, Kathleen E Harris, Atsushi Kato, Robert P Schleimer, Kathryn E Hulse
BACKGROUND: B cells play many roles in health and disease. However, little is known about the mechanisms that drive B cell responses in the airways, especially in humans. Chronic rhinosinusitis (CRS) is an inflammatory disease of the upper airways that affects 10% of Europeans and Americans. A subset of CRS patients develop nasal polyps (NP), which are characterized by type 2 inflammation, eosinophils and group 2 innate lymphoid cells (ILC2). We have reported that NP contain elevated levels of B cells and antibodies, making NP an ideal system for studying B cells in the airways...
December 21, 2016: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/27999163/single-cell-analysis-of-the-plasmablast-response-to-vibrio-cholerae-demonstrates-expansion-of-cross-reactive-memory-b-cells
#16
Robert C Kauffman, Taufiqur R Bhuiyan, Rie Nakajima, Leslie M Mayo-Smith, Rasheduzzaman Rashu, Mohammad Rubel Hoq, Fahima Chowdhury, Ashraful Islam Khan, Atiqur Rahman, Siddhartha K Bhaumik, Levelle Harris, Justin T O'Neal, Jessica F Trost, Nur Haq Alam, Algis Jasinskas, Emmanuel Dotsey, Meagan Kelly, Richelle C Charles, Peng Xu, Pavol Kováč, Stephen B Calderwood, Edward T Ryan, Phillip L Felgner, Firdausi Qadri, Jens Wrammert, Jason B Harris
: We characterized the acute B cell response in adults with cholera by analyzing the repertoire, specificity, and functional characteristics of 138 monoclonal antibodies (MAbs) generated from single-cell-sorted plasmablasts. We found that the cholera-induced responses were characterized by high levels of somatic hypermutation and large clonal expansions. A majority of the expansions targeted cholera toxin (CT) or lipopolysaccharide (LPS). Using a novel proteomics approach, we were able to identify sialidase as another major antigen targeted by the antibody response to Vibrio cholerae infection...
December 20, 2016: MBio
https://www.readbyqxmd.com/read/27986304/kinetic-analysis-of-changes-in-t-and-b-lymphocytes-after-anti-cd20-treatment-in-renal-pathology
#17
Alexis Sentís, Fritz Diekmann, Arturo Llobell, Noemí de Moner, Gerard Espinosa, Jordi Yagüe, Josep Maria Campistol, Eduard Mirapeix, Manel Juan
INTRODUCTION: The main objective of this study is to describe qualitatively and quantitatively the different immune lymphocyte phenotypes of patients with renal disease after treatment with anti-CD20. MATERIAL AND METHODS: Two cohorts of transplanted and autoimmune kidney patients were compared: (1) Those who began treatment with Rituximab, matched (for sex, age and general clinical parameters) with (2) Non-treated control kidney patients. Different analyses were performed: (A) B-lymphocyte subpopulations; (B) T-cell subpopulations; (C) serum levels of BAFF, APRIL, Rituximab and anti-Rituximab; (D) rs396991 polymorphism of CD16a and at different time points for each type of analysis: (i) at baseline, (ii) day 15, (iii) at three and (iv) six months post-antiCD20...
November 17, 2016: Immunobiology
https://www.readbyqxmd.com/read/27966518/impact-of-highly-active-antiretroviral-therapy-in-the-development-and-remission-of-oral-plasmablastic-lymphoma
#18
Vivian Petersen Wagner, Lisley Ortiz, Helena Pereira Rodrigues da Silva, Luise Meurer, João Julio da Cunha Filho, Marco Antonio Trevizani Martins, Manoela Domingues Martins
Plasmablastic lymphoma (PBL) represents a rare type of non-Hodgkin lymphoma associated with human immunodeficiency virus (HIV) infection. The impact of highly active antiretroviral therapy (HAART) in this tumor is poorly known due to its small incidence. This study reports a case of a 33-year-old HIV-positive woman who was referred to the Stomatology Department complaining about a painful gingival growth and cervical nodule both with 20 days of evolution. The lesions appeared 7 months after the patient stopped HAART...
September 2016: Indian Journal of Dental Research: Official Publication of Indian Society for Dental Research
https://www.readbyqxmd.com/read/27957358/bortezomib-ifosfamide-carboplatin-and-etoposide-in-a-patient-with-hiv-negative-relapsed-plasmablastic-lymphoma
#19
Mehmet Akce, Elaine Chang, Mohammad Haeri, Mike Perez, Christie J Finch, Mark M Udden, Martha P Mims
Plasmablastic lymphoma (PBL) is a rare subtype of diffuse large B cell lymphoma (DLBCL), often associated with HIV infection. We present a case of a 53-year-old HIV-negative man with untreated hepatitis C viral infection who presented with abdominal pain and lymphadenopathy. Lymph node and bone marrow biopsies were consistent with plasmablastic lymphoma. He had partial response (PR) to 6 cycles of EPOCH but disease progressed seven weeks later. Repeat biopsy was consistent with plasmablastic lymphoma. Three cycles of bortezomib, ifosfamide, carboplatin, and etoposide (B-ICE) chemotherapy resulted in a partial response (PR)...
2016: Case Reports in Hematology
https://www.readbyqxmd.com/read/27933753/mass-cytometry-of-follicular-lymphoma-tumors-reveals-intrinsic-heterogeneity-in-proteins-including-hla-dr-and-a-deficit-in-non-malignant-plasmablast-and-germinal-center-b-cell-populations
#20
Cara Ellen Wogsland, Allison Rae Greenplate, Arne Kolstad, June Helen Myklebust, Jonathan Michael Irish, Kanutte Huse
BACKGROUND: Follicular lymphoma (FL) is an indolent non-Hodgkin lymphoma that has a risk of transformation to more aggressive lymphoma. Relatively little is known about the non-malignant B-cell and T-cell subset composition within the tumor microenvironment and whether altered phenotypes are associated with patterns of lymphoma B-cell heterogeneity. METHODS: Two mass cytometry (CyTOF) panels were designed to immunophenotype B and T cells in FL tumors. Populations of malignant B cells, non-malignant B cells, and T cells from each FL tumor were identified and their phenotypes compared to B and T cells from healthy human tonsillar tissue...
December 9, 2016: Cytometry. Part B, Clinical Cytometry
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