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Plasmablast

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https://www.readbyqxmd.com/read/29344169/bortezomib-overcomes-the-negative-prognostic-impact-of-renal-impairment-in-a-newly-diagnosed-elderly-patient-with-multiple-myeloma-a-case-report
#1
Tao Wu, Jinmao Zhou, Cunbang Wang, Binbin Wang, Shuting Zhang, Hai Bai
Multiple myeloma (MM) is a common B-cell hematological malignancy in the clinic. Bortezomib is the first-in-class proteasome inhibitor that has been approved for the treatment of patients with MM in the bone marrow. The present study report the case of an 83-year-old man who showed marked weakness, fatigue and a poor appetite. The patient was admitted to the Department of Nephrology due to severe renal impairment (RI). Immunofixation electrophoresis indicated a λ light chain-positive status. There were 19...
December 2017: Oncology Letters
https://www.readbyqxmd.com/read/29336281/naive-and-effector-b-cell-subtypes-are-increased-in-chronic-rhinosinusitis-with-polyps
#2
Dijana Miljkovic, Alkis Psaltis, Peter-John Wormald, Sarah Vreugde
BACKGROUND: Recent studies demonstrated that B cells and their chemoattractants are elevated in the nasal mucosa of patients with chronic rhinosinusitis (CRS) with nasal polyposis (CRSwNP). However, the presence of naive B cells and of plasmablasts and memory B-cell subsets in the mucosa and periphery of the same patient with CRS is yet to be characterized. OBJECTIVE: Here we sought to quantify naive, plasmablasts, and memory B cells in mucosal tissue and peripheral blood of patients with CRSwNP, patients with CRS without nasal polyps (CRSsNP), and control patients...
January 1, 2018: American Journal of Rhinology & Allergy
https://www.readbyqxmd.com/read/29327711/cd3-positive-plasmablastic-b-cell-neoplasms-a-diagnostic-pitfall
#3
Zenggang Pan, Mingyi Chen, Qianyun Zhang, Endi Wang, Liqun Yin, Youyuan Xu, Qin Huang, Youzhong Yuan, Xiaohui Zhang, Gang Zheng, Ji Yuan
Rare B-cell neoplasms with plasmablastic differentiation may aberrantly express CD3 by immunohistochemical staining, which places a great challenge for diagnosis. We here studied 17 cases of CD3+ plasmablastic B-cell neoplasms, including 12 plasmablastic lymphomas and 5 plasmablastic plasma cell myelomas. All 17 cases occurred in the extranodal sites with a male predominance (13/17). Four cases were initially misinterpreted by outside institutions, among which three were diagnosed as 'peripheral T-cell lymphoma, not otherwise specified' and one was classified as 'poorly differentiated neuroendocrine carcinoma'...
January 12, 2018: Modern Pathology: An Official Journal of the United States and Canadian Academy of Pathology, Inc
https://www.readbyqxmd.com/read/29321143/control-of-humoral-response-in-renal-transplantation-by-belatacept-depends-on-a-direct-effect-on-b-cells-and-impaired-t-follicular-helper-b-cell-crosstalk
#4
Claire Leibler, Allan Thiolat, Carole Hénique, Chloé Samson, Caroline Pilon, Marie Tamagne, France Pirenne, Benoit Vingert, José L Cohen, Philippe Grimbert
Generation of de novo donor-specific antibodies (dnDSAs) after renal transplant is recognized as the leading cause of late transplant failure. Hence, the optimal immunosuppressive strategies to limit dnDSA development need to be defined. Recent clinical trials using the novel costimulatory blockade agent CTLA4-Ig (Belatacept) have shown that kidney transplant recipients (KTRs) treated with Belatacept have better graft survival and function and a lower proportion of dnDSAs than control-treated KTRs. Mechanisms involved in the control of humoral responses by Belatacept remain to be investigated...
January 10, 2018: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/29310341/the-correlational-research-among-serum-cxcl13-levels-circulating-plasmablasts-and-memory-b-cells-in-patients-with-systemic-lupus-erythematosus-a-strobe-compliant-article
#5
Chenglong Fang, Tingting Luo, Ling Lin
We investigated whether serum CXC ligand 13 protein (CXCL13) levels correlate with the circulating plasmablasts and memory B-cells alteration in systemic lupus erythematosus (SLE) patients. The diagnostic use of CXCL13 concentrations in active lupus was also analyzed.A total of 36 SLE patients and 18 healthy controls were included. Serum CXCL13 levels were examined by enzyme-linked immunosorbent assay. The frequency and absolute count of circulating plasmablasts and memory B cells were analyzed by flow cytometry...
December 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29309048/early-b-cell-changes-predict-autoimmunity-following-combination-immune-checkpoint-blockade
#6
Rituparna Das, Noffar Bar, Michelle Ferreira, Aaron M Newman, Lin Zhang, Jithendra Kini Bailur, Antonella Bacchiocchi, Harriet Kluger, Wei Wei, Ruth Halaban, Mario Sznol, Madhav V Dhodapkar, Kavita M Dhodapkar
Combination checkpoint blockade (CCB) targeting inhibitory CTLA4 and PD1 receptors holds promise for cancer therapy. Immune-related adverse events (IRAEs) remain a major obstacle for the optimal application of CCB in cancer. Here, we analyzed B cell changes in patients with melanoma following treatment with either anti-CTLA4 or anti-PD1, or in combination. CCB therapy led to changes in circulating B cells that were detectable after the first cycle of therapy and characterized by a decline in circulating B cells and an increase in CD21lo B cells and plasmablasts...
January 8, 2018: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/29303024/bortezomib-in-combination-with-dose-adjusted-epoch-etoposide-prednisone-vincristine-cyclophosphamide-and-doxorubicin-induces-long-term-survival-in-patients-with-plasmablastic-lymphoma-a-retrospective-analysis
#7
Christopher Dittus, Natalie Grover, Steven Ellsworth, Xianming Tan, Steven I Park
Plasmablastic lymphoma (PBL) is a rare and aggressive form of B-cell non-Hodgkin lymphoma. This subtype of lymphoma has a post-germinal center cell-of-origin called the plasmablast, and the immunophenotype is more consistent with that of a plasma cell than a lymphocyte. Because of these unique features, PBL is notoriously difficult to treat. Case reports and small reviews have evaluated the addition of agents directed against plasma cell disorders in combination with traditional lymphoma-directed regimens. We describe the largest case series to date, with the longest follow-up, evaluating bortezomib in combination with etoposide, prednisone, vincristine, cyclophosphamide, and doxorubicin (V-EPOCH) for the treatment of PBL...
January 5, 2018: Leukemia & Lymphoma
https://www.readbyqxmd.com/read/29296925/replacing-mouse-baff-with-human-baff-does-not-improve-b-cell-maturation-in-hematopoietic-humanized-mice
#8
Julie Lang, Bicheng Zhang, Margot Kelly, Jacob N Peterson, Jacob Barbee, Brian M Freed, James P Di Santo, Jennifer L Matsuda, Raul M Torres, Roberta Pelanda
Hematopoietic humanized mice (hu-mice) have been developed to study the human immune system in an experimental in vivo model, and experiments to improve its performance are ongoing. Previous studies have suggested that the impaired maturation of human B cells observed in hu-mice might be in part due to inefficient interaction of the human B-cell-activating factor (hBAFF) receptor with mouse B-cell-activating factor (mBAFF), as this cytokine is an important homeostatic and differentiation factor for B lymphocytes both in mice and humans...
December 26, 2017: Blood Advances
https://www.readbyqxmd.com/read/29296171/micrornas-sequencing-unveils-distinct-molecular-subgroups-of-plasmablastic-lymphoma
#9
Maria Raffaella Ambrosio, Lucia Mundo, Sara Gazaneo, Matteo Picciolini, Prasad Satya Vara, Shaheen Sayed, Alessandro Ginori, Giuseppe Lo Bello, Leonardo Del Porro, Mohsen Navari, Stefano Ascani, Amhed Yonis, Lorenzo Leoncini, Pier Paolo Piccaluga, Stefano Lazzi
Plasmablastic lymphoma (PBL) is an aggressive lymphoma, often arising in the context of immunodeficiency and associated with Epstein-Barr virus (EBV) infection. The most frequently detected genetic alteration is the deregulation of MYC gene through the translocation - t(8;14)(q24;q32). The diagnosis of PBL is often challenging because it has an overlap in morphology, immunophenotype, cytogenetics and virus association with other lymphomas and plasma cell neoplasms; further, its molecular basis remains elusive...
December 8, 2017: Oncotarget
https://www.readbyqxmd.com/read/29259245/atp-degrading-enpp1-is-required-for-survival-or-persistence-of-long-lived-plasma-cells
#10
Hongsheng Wang, Ines Gonzalez-Garcia, Javier Traba, Shweta Jain, Solomon Conteh, Dong-Mi Shin, Chenfeng Qi, Yuanyuan Gao, Jiafang Sun, Sungyun Kang, Sadia Abbasi, Zohreh Naghashfar, Jeongheon Yoon, Wendy DuBois, Alexander L Kovalchuk, Michael N Sack, Patrick Duffy, Herbert C Morse
Survival of antibody-secreting plasma cells (PCs) is vital for sustained antibody production. However, it remains poorly understood how long-lived PCs (LLPCs) are generated and maintained. Here we report that ectonucleotide pyrophosphatase/phosphodiesterase 1 (ENPP1) is preferentially upregulated in bone marrow LLPCs compared with their splenic short-lived counterparts (SLPCs). We studied ENPP1-deficient mice (Enpp1 -/- ) to determine how the enzyme affects PC biology. Although Enpp1 -/- mice generated normal levels of germinal center B cells and plasmablasts in periphery, they produced significantly reduced numbers of LLPCs following immunization with T-dependent antigens or infection with plasmodium C...
December 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29224674/drivers-of-the-immunopathogenesis-in-systemic-lupus-erythematosus
#11
REVIEW
Thomas Rose, Thomas Dörner
This review summarises a number of current insights into the pathogenesis of SLE. On the basis of the interaction of environmental factors within a predisposed host, a chronic autoimmune process gains function with a positive feed-forward loop between innate and adaptive immunity. A current focus of SLE pathogenesis is on the enhanced production of certain cytokines, such as type I interferons and BLyS/BAFF, suggesting continuous plasmacytoid dendritic and myeloid cell activity together with disturbances of B lineage cells (increased autoantibodies, including anti-dsDNA and plasmablasts, which correlate with SLE activity and memory B-cell abnormalities)...
June 2017: Best Practice & Research. Clinical Rheumatology
https://www.readbyqxmd.com/read/29209313/unconventional-pro-inflammatory-cd4-t-cell-response-in-b-cell-deficient-mice-infected-with-trypanosoma-cruzi
#12
Melisa Gorosito Serrán, Jimena Tosello Boari, Facundo Fiocca Vernengo, Cristian G Beccaría, María C Ramello, Daniela A Bermejo, Amelia G Cook, Carola G Vinuesa, Carolina L Montes, Eva V Acosta Rodriguez, Adriana Gruppi
Chagas disease, caused by the parasite Trypanosoma cruzi, is endemic in Latin America but has become a global public health concern by migration of infected people. It has been reported that parasite persistence as well as the intensity of the inflammatory immune response are determinants of the clinical manifestations of the disease. Even though inflammation is indispensable for host defense, when deregulated, it can contribute to tissue injury and organ dysfunction. Here, we report the importance of B cells in conditioning T cell response in T...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29206290/primary-effusion-lymphoma-in-taiwan-shows-two-distinctive-clinicopathological-subtypes-with-rare-hiv-association
#13
Bo-Jung Chen, Ran-Ching Wang, Chung-Han Ho, Chang-Tsu Yuan, Wan-Ting Huang, Sheau-Fang Yang, Pin-Pen Hsieh, Yun-Chih Yung, Shih-Yao Lin, Chen-Fang Hsu, Ying-Zhen Su, Chun-Chi Kuo, Shih-Sung Chuang
AIMS: To investigate the clinicopatholoigcal and molecular features of primary effusion lymphoma (PEL) in Taiwan and the association with HIV, HHV8, and EBV. METHODS AND RESULTS: We retrospectively investigated 26 cases with a median age of 76.5. Only one (4%) patient was infected with HIV. Cytologically, all lymphoma cells revealed typical immunoblastic to plasmablastic morphology. Immunohistochemically, HHV8 was positive in 8 (32%) tumours, negative in 17 (68%) cases...
December 5, 2017: Histopathology
https://www.readbyqxmd.com/read/29198143/ebv-hhv-8-multicentric-castleman-disease-with-plasmablastic-aggregates-in-an-hiv-man-an-evolving-clinicopathologic-entity
#14
Aditya Shivane, Amy Pearce, Nadia Khatib, Mark E F Smith
We report a case of EBV+ and HHV-8+ multicentric Castleman disease with plasmablastic aggregates in an HIV-positive individual. A 41-year-old man presented in early 2015 with fevers, sweats, weight loss, intractable itching, and on subsequent testing was found to be HIV positive. Investigations showed cervical lymphadenopathy and splenomegaly. He was treated for HIV and his symptoms resolved. His symptoms recurred in January 2016, and a provisional diagnosis of multicentric Castleman disease was entertained...
December 1, 2017: International Journal of Surgical Pathology
https://www.readbyqxmd.com/read/29197269/anti-tumour-necrosis-factor-%C3%AE-antibodies-and-b-cell-homeostasis-in-human-inflammatory-bowel-diseases
#15
Caterina Defendenti, Fabiola Atzeni, Sergio Malandrin, Sandro Ardizzone, Piero Luigi Almasio, Simone Saibeni, Cristina Bezzio, Simona Bollani, Raffaele Salerno, Paolo Declich, Zoe Sarno, Savino Bruno, Rossella Talotta, Piercarlo Sarzi-Puttini
BACKGROUND: The expression of CD70 on T cells is greatly enhanced by antigen-presenting cell (APC)-associated signals, such as tumour necrosis factor(TNF)-α, which is constitutionally high in patients with inflammatory bowel disease (IBD). Experimentally, the chronic activation of CD27 as a result of the constitutive expression of CD70 leads to the demise of B cells in bone marrow (BM) and the secondary lymphoid organs. The aim of this study was to assess the number and phenotype of circulating B cell in untreated IBD patients and their counterparts treated with biological anti-TNF drugs...
January 2018: International Immunopharmacology
https://www.readbyqxmd.com/read/29192160/a-novel-human-systemic-lupus-erythematosus-model-in-humanised-mice
#16
Merry Gunawan, Zhisheng Her, Min Liu, Sue Yee Tan, Xue Ying Chan, Wilson Wei Sheng Tan, Shubasree Dharmaraaja, Yong Fan, Chee Bing Ong, Eva Loh, Kenneth Tou En Chang, Thiam Chye Tan, Jerry Kok Yen Chan, Qingfeng Chen
Mouse models have contributed to the bulk of knowledge on Systemic Lupus Erythematosus (SLE). Nevertheless, substantial differences exist between human and mouse immune system. We aimed to establish and characterise a SLE model mediated by human immune system. Injection of pristane into immunodeficient mice reconstituted with human immune system (humanised mice) recapitulated key SLE features, including: production of human anti-nuclear autoantibodies, lupus nephritis, and pulmonary serositis. There was a reduction in the number of human lymphocytes in peripheral blood, resembling lymphopenia in SLE patients...
November 30, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29187222/unusual-presentation-of-plasmablastic-lymphoma-involving-ovarian-mature-cystic-teratoma-a-case-report
#17
Ita Hadžisejdić, Emina Babarović, Luka Vranić, Antica Duletić Načinović, Ksenija Lučin, Maja Krašević, Nives Jonjić
BACKGROUND: Plasmablastic lymphoma (PBL) is relatively new clinical entity described as a distinct subtype of diffuse large B-cell lymphoma (DLBCL). It is characterized by its aggressive nature and proliferation of large neoplastic cells resembling immunoblasts including cells with more obvious plasmacytic differentiation. In this case report, we describe an unexpected finding of PBL associated with a mature cystic teratoma of the ovary in a young immune competent woman. CASE PRESENTATION: A 19-year old woman was admitted to the hospital with generalized lymphadenopathy, a pelvic tumor mass measuring 35 × 30 cm and a 4 cm lump in her right breast...
November 29, 2017: Diagnostic Pathology
https://www.readbyqxmd.com/read/29181005/induction-of-robust-b-cell-responses-after-influenza-mrna-vaccination-is-accompanied-by-circulating-hemagglutinin-specific-icos-pd-1-cxcr3-t-follicular-helper-cells
#18
Gustaf Lindgren, Sebastian Ols, Frank Liang, Elizabeth A Thompson, Ang Lin, Fredrika Hellgren, Kapil Bahl, Shinu John, Olga Yuzhakov, Kimberly J Hassett, Luis A Brito, Hugh Salter, Giuseppe Ciaramella, Karin Loré
Modified mRNA vaccines have developed into an effective and well-tolerated vaccine platform that offers scalable and precise antigen production. Nevertheless, the immunological events leading to strong antibody responses elicited by mRNA vaccines are largely unknown. In this study, we demonstrate that protective levels of antibodies to hemagglutinin were induced after two immunizations of modified non-replicating mRNA encoding influenza H10 encapsulated in lipid nanoparticles (LNP) in non-human primates. While both intradermal (ID) and intramuscular (IM) administration induced protective titers, ID delivery generated this response more rapidly...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29163465/b-cell-activating-factor-and-the-b-cell-compartment-in-hiv-siv-infection
#19
REVIEW
Gwenoline Borhis, Maria Trovato, Nada Chaoul, Hany M Ibrahim, Yolande Richard
With the goal to design effective HIV vaccines, intensive studies focused on broadly neutralizing antibodies, which arise in a fraction of HIV-infected people. Apart from identifying new vulnerability sites in the viral envelope proteins, these studies have shown that a fraction of these antibodies are produced by self/poly-reactive B-cells. These findings prompted us to revisit the B-cell differentiation and selection process during HIV/SIV infection and to consider B-cells as active players possibly shaping the helper T-cell program within germinal centers (GCs)...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29152785/ultrastructure-of-plasma-cells-in-harderian-gland-of-laying-hens
#20
P Bejdić, R Avdić, Lj Amidžić, V Ćutahija, F Tandir, N Hadžiomerović, A Katica, N Mlaćo
Ultrastructure of plasma cells in Harderian gland was investigated using the transmission electron microscopy. For this research, we examined the glands of 32 laying hens collected at 1, 7, 20 and 40 days and 4, 6, 8 and 12 months of the birds' ages. The research showed that the stroma of the gland contains a large number of lymphocytes and plasma cells. Most of the plasma cells are mature, but morphologically do not show productive activity. Only some individual plasma cells, situated under the secretory epithelium of primary and secondary ducts, have extremely dilated cisternae of rough endoplasmic reticulum which contain moderately dense, granular material...
November 19, 2017: Anatomia, Histologia, Embryologia
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