keyword
MENU ▼
Read by QxMD icon Read
search

Regulatory B cell in transplantation

keyword
https://www.readbyqxmd.com/read/29126177/cd30-expression-in-monomorphic-posttransplant-lymphoproliferative-disorder-diffuse-large-b-cell-lymphoma-correlates-with-greater-regulatory-t-cell-infiltration
#1
Christopher Hartley, James W Vaughan, Jason Jarzembowski, Steven H Kroft, Paul Hosking, Alexandra M Harrington, Horatiu Olteanu
Objectives: CD30 is a protein thought to promote cell proliferation/survival and downregulate the immune response. Twenty percent to 40% of de novo diffuse large B-cell lymphomas (DLBCLs) express CD30, and some patients have been treated with the anti-CD30 agent brentuximab. In the solid organ transplant setting, allograft regulatory T cells (Tregs) have been shown to be modulated via CD30 signaling. Methods: Posttransplant lymphoproliferative disorders (PTLDs) constitute a heterogeneous group of lymphomas, and since CD30 expression has been rarely formally assessed in PTLDs, we analyzed a cohort of PTLDs...
November 8, 2017: American Journal of Clinical Pathology
https://www.readbyqxmd.com/read/29111199/density-dependent-re-tuning-of-autoreactive-t-cells-alleviates-their-pathogenicity-in-a-lymphopenic-environment
#2
Eleanore Chuang, Marilyn Augustine, Matthew Jung, Ronald H Schwartz, Nevil J Singh
Peripheral T cell tolerance is challenging to induce in partially lymphopenic hosts and this is relevant for clinical situations involving transplant tolerance. While the shortage of regulatory cells is thought to be one reason for this, T cell-intrinsic tolerance processes such as anergy are also poorly triggered in such hosts. In order to understand the latter, we used a T cell deficient mouse model system where adoptively transferred autoreactive T cells are significantly tolerized in a cell intrinsic fashion, without differentiation to regulatory T cells...
December 2017: Immunology Letters
https://www.readbyqxmd.com/read/29093262/human-regulatory-t-cells-undergo-self-inflicted-damage-via-granzyme-pathways-upon-activation
#3
Esilida Sula Karreci, Siawosh K Eskandari, Farokh Dotiwala, Sujit K Routray, Ahmed T Kurdi, Jean Pierre Assaker, Pavlo Luckyanchykov, Albana B Mihali, Omar Maarouf, Thiago J Borges, Abdullah Alkhudhayri, Kruti R Patel, Amr Radwan, Irene Ghobrial, Martina McGrath, Anil Chandraker, Leonardo V Riella, Wassim Elyaman, Reza Abdi, Judy Lieberman, Jamil Azzi
Tregs hold great promise as a cellular therapy for multiple immunologically mediated diseases, given their ability to control immune responses. The success of such strategies depends on the expansion of healthy, suppressive Tregs ex vivo and in vivo following the transfer. In clinical studies, levels of transferred Tregs decline sharply in the blood within a few days of the transfer. Tregs have a high rate of apoptosis. Here, we describe a new mechanism of Treg self-inflicted damage. We show that granzymes A and -B (GrA and GrB), which are highly upregulated in human Tregs upon stimulation, leak out of cytotoxic granules to induce cleavage of cytoplasmic and nuclear substrates, precipitating apoptosis in target cells...
November 2, 2017: JCI Insight
https://www.readbyqxmd.com/read/29068389/clinical-effect-of-irt-5-probiotics-on-immune-modulation-of-autoimmunity-or-alloimmunity-in-the-eye
#4
Jaeyoung Kim, Se Hyun Choi, Yu Jeong Kim, Hyun Jeong Jeong, Jin Suk Ryu, Hyun Ju Lee, Tae Wan Kim, Sin-Hyeog Im, Joo Youn Oh, Mee Kum Kim
BACKGROUND: Although the relation of the gut microbiota to a development of autoimmune and inflammatory diseases has been investigated in various animal models, there are limited studies that evaluate the effect of probiotics in the autoimmune eye disease. Therefore, we aimed to investigate the effect of IRT-5 probiotics consisting of Lactobacillus casei, Lactobacillus acidophilus, Lactobacillus reuteri, Bifidobacterium bifidum, and Streptococcus thermophilus on the autoimmunity of uveitis and dry eye and alloimmunity of corneal transplantation...
October 25, 2017: Nutrients
https://www.readbyqxmd.com/read/29038423/regulation-of-t-cell-alloimmunity-by-pi3k%C3%AE-and-pi3k%C3%AE
#5
Mayuko Uehara, Martina M McGrath, Shunsuke Ohori, Zhabiz Solhjou, Naima Banouni, Sujit Routray, Catherine Evans, Jonathan P DiNitto, Abdallah Elkhal, Laurence A Turka, Terry B Strom, Stefan G Tullius, David G Winkler, Jamil Azzi, Reza Abdi
Phosphatidylinositol-3-kinases (PI3K) γ and δ are preferentially enriched in leukocytes, and defects in these signaling pathways have been shown to impair T cell activation. The effects of PI3Kγ and PI3Kδ on alloimmunity remain underexplored. Here, we show that both PI3Kγ (-/-) and PI3Kδ (D910A/D910A) mice receiving heart allografts have suppression of alloreactive T effector cells and delayed acute rejection. However, PI3Kδ mutation also dampens regulatory T cells (Treg). After treatment with low dose CTLA4-Ig, PI3Kγ (-/-) , but not PI3Κδ (D910A/D910A) , recipients exhibit indefinite prolongation of heart allograft survival...
October 16, 2017: Nature Communications
https://www.readbyqxmd.com/read/29023267/enhanced-th17-responses-in-patients-with-il10-receptor-deficiency-and-infantile-onset-ibd
#6
Dror S Shouval, Liza Konnikova, Alexandra E Griffith, Sarah M Wall, Amlan Biswas, Lael Werner, Moran Nunberg, Jochen Kammermeier, Jeremy A Goettel, Rajsavi Anand, Hannah Chen, Batia Weiss, Jian Li, Anthony Loizides, Baruch Yerushalmi, Tadahiro Yanagi, Rita Beier, Laurie S Conklin, Christen L Ebens, Fernanda G M S Santos, Mary Sherlock, Jeffery D Goldsmith, Daniel Kotlarz, Sarah C Glover, Neil Shah, Athos Bousvaros, Holm H Uhlig, Aleixo M Muise, Christoph Klein, Scott B Snapper
BACKGROUND: IL10 receptor (IL10R) deficiency causes severe infantile-onset inflammatory bowel disease. Intact IL10R-dependent signals have been shown to be important for innate and adaptive immune cell functions in mice. We have previously reported a key role of IL10 in the generation and function of human anti-inflammatory macrophages. Independent of innate immune cell defects, the aim of the current study was to determine the role of IL10R signaling in regulating human CD4 T-cell function...
November 2017: Inflammatory Bowel Diseases
https://www.readbyqxmd.com/read/28983300/human-tregs-made-antigen-specific-by-gene-modification-the-power-to-treat-autoimmunity-and-antidrug-antibodies-with-precision
#7
REVIEW
Patrick R Adair, Yong Chan Kim, Ai-Hong Zhang, Jeongheon Yoon, David W Scott
Human regulatory CD4(+) T cells (Tregs) are potent immunosuppressive lymphocytes responsible for immune tolerance and homeostasis. Since the seminal reports identifying Tregs, vast research has been channeled into understanding their genesis, signature molecular markers, mechanisms of suppression, and role in disease. This research has opened the doors for Tregs as a potential therapeutic for diseases and disorders such as multiple sclerosis, type I diabetes, transplantation, and immune responses to protein therapeutics, like factor VIII...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28941322/stromal-cell-derived-factor-1-mediates-cardiac-allograft-tolerance-induced-by-human-endometrial-regenerative-cell-based-therapy
#8
Xu Lan, Grace Wang, Xiaoxi Xu, Shanzheng Lu, Xiang Li, Baoren Zhang, Ganggang Shi, Yiming Zhao, Caigan Du, Hao Wang
Endometrial regenerative cells (ERCs) are mesenchymal-like stromal cells, and their therapeutic potential has been tested in the prevention of renal ischemic reperfusion injury, acute liver injury, ulcerative colitis, and immunosuppression. However, their potential in the induction of transplant tolerance has not been investigated. The present study was undertaken to investigate the efficacy of ERCs in inducing cardiac allograft tolerance and the function of stromal cell-derived factor-1 (SDF-1) in the ERC-mediated immunoregulation...
November 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/28935847/cd56-bright-natural-killer-regulatory-cells-in-filgrastim-primed-donor-blood-or-marrow-products-regulate-chronic-graft-versus-host-disease-the-canadian-blood-and-marrow-transplant-group-randomized-0601-study-results
#9
Amina Kariminia, Sabine Ivison, Bernard Ng, Jacob Rozmus, Susanna Sung, Avani Varshney, Mahmoud Aljurf, Sylvie Lachance, Irwin Walker, Cindy Toze, Jeff Lipton, Stephanie J Lee, Jeff Szer, Richard Doocey, Ian Lewis, Clayton Smith, Naeem Chaudhri, Megan K Levings, Raewyn Broady, Gerald Devins, David Szwajcer, Ronan Foley, Sara Mostafavi, Steven Pavletic, Donna A Wall, Stephan Couban, Tony Panzarella, Kirk R Schultz
Randomized trials have conclusively shown higher rates of chronic graft-versus-host disease with filgrastim-stimulated apheresis peripheral blood as a donor source than unstimulated bone marrow. The Canadian Blood and Marrow Transplant Group conducted a phase 3 study of adults who received either filgrastim-stimulated apheresis peripheral blood or filgrastim-stimulated bone marrow from human leukocyte antigen-identical sibling donors. Because all donors received the identical filgrastim dosing schedule, this study allowed for a controlled evaluation of the impact of stem cell source on development of chronic graft-versus-host disease...
November 2017: Haematologica
https://www.readbyqxmd.com/read/28935578/abin1-determines-severity-of-glomerulonephritis-via-activation-of-intrinsic-glomerular-inflammation
#10
Erik A Korte, Dawn J Caster, Michelle T Barati, Min Tan, Shirong Zheng, Celine C Berthier, Frank C Brosius, Mark B Vieyra, Ryan M Sheehan, Michele Kosiewicz, Marcin Wysoczynski, Patrick M Gaffney, David J Salant, Kenneth R McLeish, David W Powell
Transcription factor NF-κB regulates expression of numerous genes that control inflammation and is activated in glomerular cells in glomerulonephritis (GN). We previously identified genetic variants for a NF-κB regulatory, ubiquitin-binding protein ABIN1 as risk factors for GN in systemic autoimmunity. The goal was to define glomerular inflammatory events controlled by ABIN1 function in GN. Nephrotoxic serum nephritis was induced in wild-type (WT) and ubiquitin-binding deficient ABIN1[D485N] mice, and renal pathophysiology and glomerular inflammatory phenotypes were assessed...
September 19, 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/28931653/combined-ox40l-and-mtor-blockade-controls-effector-t-cell-activation-while-preserving-treg-reconstitution-after-transplant
#11
Victor Tkachev, Scott N Furlan, Benjamin Watkins, Daniel J Hunt, Hengqi Betty Zheng, Angela Panoskaltsis-Mortari, Kayla Betz, Melanie Brown, John B Schell, Katie Zeleski, Alison Yu, Ian Kirby, Sarah Cooley, Jeffrey S Miller, Bruce R Blazar, Duncan Casson, Phil Bland-Ward, Leslie S Kean
A critical question facing the field of transplantation is how to control effector T cell (Teff) activation while preserving regulatory T cell (Treg) function. Standard calcineurin inhibitor-based strategies can partially control Teffs, but breakthrough activation still occurs, and these agents are antagonistic to Treg function. Conversely, mechanistic target of rapamycin (mTOR) inhibition with sirolimus is more Treg-compatible but is inadequate to fully control Teff activation. In contrast, blockade of OX40L signaling has the capacity to partially control Teff activation despite maintaining Treg function...
September 20, 2017: Science Translational Medicine
https://www.readbyqxmd.com/read/28928775/assessment-of-safety-and-functional-efficacy-of-stem-cell-based-therapeutic-approaches-using-retinal-degenerative-animal-models
#12
REVIEW
Tai-Chi Lin, Magdalene J Seiler, Danhong Zhu, Paulo Falabella, David R Hinton, Dennis O Clegg, Mark S Humayun, Biju B Thomas
Dysfunction and death of retinal pigment epithelium (RPE) and or photoreceptors can lead to irreversible vision loss. The eye represents an ideal microenvironment for stem cell-based therapy. It is considered an "immune privileged" site, and the number of cells needed for therapy is relatively low for the area of focused vision (macula). Further, surgical placement of stem cell-derived grafts (RPE, retinal progenitors, and photoreceptor precursors) into the vitreous cavity or subretinal space has been well established...
2017: Stem Cells International
https://www.readbyqxmd.com/read/28898976/regulation-of-immune-and-neural-function-via-leukocyte-ig-like-receptors
#13
REVIEW
Kazuya Takeda, Akira Nakamura
Leukocyte Ig-like receptors (LILRs)/Ig-like transcripts (ILTs) are expressed on innate and adaptive immune cells and maintain immune homeostasis. LILRs consist of activating and inhibitory-type receptors that regulate adequate cellular functions. LILRs were firstly identified as MHC class I receptors, therefore expression and/or polymorphisms of LILRs are reported to associate with autoimmune disorders and transplant rejection; however, recent accumulating evidences have revealed that LILRs recognize with diverse ligands including bacteria and virus...
August 1, 2017: Journal of Biochemistry
https://www.readbyqxmd.com/read/28894451/inflammatory-conditions-dictate-the-effect-of-mesenchymal-stem-or-stromal-cells-on-b-cell-function
#14
Franka Luk, Laura Carreras-Planella, Sander S Korevaar, Samantha F H de Witte, Francesc E Borràs, Michiel G H Betjes, Carla C Baan, Martin J Hoogduijn, Marcella Franquesa
The immunomodulatory capacity of mesenchymal stem or stromal cells (MSC) makes them a promising tool for treatment of immune disease and organ transplantation. The effects of MSC on B cells are characterized by an abrogation of plasmablast formation and induction of regulatory B cells (Bregs). It is, however, unknown how MSC interact with B cells under inflammatory conditions. In this study, adipose tissue-derived MSC were pretreated with 50 ng/ml IFN-γ for 96 h (MSC-IFN-γ) to simulate inflammatory conditions...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28878768/natural-igm-and-tlr-agonists-switch-murine-splenic-pan-b-to-regulatory-cells-that-suppress-ischemia-induced-innate-inflammation-via-regulating-nkt-1-cells
#15
Peter I Lobo, Kailo H Schlegel, Amandeep Bajwa, Liping Huang, Mark D Okusa
Natural IgM anti-leukocyte autoantibodies (IgM-ALAs) inhibit inflammation by several mechanisms. Here, we show that pan-B cells and bone marrow-derived dendritic cells (BMDCs) are switched to regulatory cells when pretreated ex vivo with IgM. B cells are also switched to regulatory cells when pretreated ex vivo with CpG but not with LPS. Pre-emptive infusion of such ex vivo induced regulatory cells protects C57BL/6 mice from ischemia-induced acute kidney injury (AKI) via regulation of in vivo NKT-1 cells, which normally amplify the innate inflammatory response to DAMPS released after reperfusion of the ischemic kidney...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28878331/the-immunosuppressive-effect-of-the-tick-protein-salp15-is-long-lasting-and-persists-in-a-murine-model-of-hematopoietic-transplant
#16
Julen Tomás-Cortázar, Itziar Martín-Ruiz, Diego Barriales, Miguel Ángel Pascual-Itoiz, Virginia Gutiérrez de Juan, Alfredo Caro-Maldonado, Nekane Merino, Alberto Marina, Francisco J Blanco, Juana María Flores, James D Sutherland, Rosa Barrio, Adriana Rojas, María Luz Martínez-Chantar, Arkaitz Carracedo, Carolina Simó, Virginia García-Cañas, Leticia Abecia, José Luis Lavín, Ana M Aransay, Héctor Rodríguez, Juan Anguita
Salp15, a salivary protein of Ixodes ticks, inhibits the activation of naïve CD4 T cells. Treatment with Salp15 results in the inhibition of early signaling events and the production of the autocrine growth factor, interleukin-2. The fate of the CD4 T cells activated in the presence of Salp15 or its long-term effects are, however, unknown. We now show that Salp15 binding to CD4 is persistent and induces a long-lasting immunomodulatory effect. The activity of Salp15 results in sustained diminished cross-antigenic antibody production even after interruption of the treatment with the protein...
September 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28873074/adipose-derived-cellular-therapies-in-solid-organ-and-vascularized-composite-allotransplantation
#17
Katlin B Stivers, Jason E Beare, Paula M Chilton, Stuart K Williams, Christina L Kaufman, James B Hoying
PURPOSE OF REVIEW: Controlling acute allograft rejection following vascularized composite allotransplantation requires strict adherence to courses of systemic immunosuppression. Discovering new methods to modulate the alloreactive immune response is essential for widespread application of vascularized composite allotransplantation. Here, we discuss how adipose-derived cellular therapies represent novel treatment options for immune modulation and tolerance induction in vascularized composite allotransplantation...
October 2017: Current Opinion in Organ Transplantation
https://www.readbyqxmd.com/read/28855905/mesenchymal-stem-cells-may-ameliorate-nephrotic-syndrome-post-allogeneic-hematopoietic-stem-cell-transplantation-case-report
#18
Xin Zhang, Yanwen Peng, Zhiping Fan, Ke Zhao, Xiaoyong Chen, Ren Lin, Jing Sun, Guobao Wang, AndyPeng Xiang, Qifa Liu
INTRODUCTION: Because of their immunomodulatory and anti-inflammatory effects, mesenchymal stem cells (MSCs) have been considered as potential therapeutic agents for treating immune-related or autoimmune diseases, such as graft-versus-host disease (GVHD). Nephrotic syndrome (NS) after allogeneic hematopoietic stem cell transplantation (allo-HSCT) is an uncommon complication with unclear etiology and pathogenesis. It may be an immune disorder involving immune complex deposition, B cells, regulatory T cells (Tregs), and Th1 cytokines and be a manifestation of chronic GVHD...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28842469/a20-restrains-thymic-regulatory-t-cell-development
#19
Julius Clemens Fischer, Vera Otten, Maike Kober, Christoph Drees, Marc Rosenbaum, Martina Schmickl, Simon Heidegger, Rudi Beyaert, Geert van Loo, Xian Chang Li, Christian Peschel, Marc Schmidt-Supprian, Tobias Haas, Silvia Spoerl, Hendrik Poeck
Maintaining immune tolerance requires the production of Foxp3-expressing regulatory T (Treg) cells in the thymus. Activation of NF-κB transcription factors is critically required for Treg cell development, partly via initiating Foxp3 expression. NF-κB activation is controlled by a negative feedback regulation through the ubiquitin editing enzyme A20, which reduces proinflammatory signaling in myeloid cells and B cells. In naive CD4(+) T cells, A20 prevents kinase RIPK3-dependent necroptosis. Using mice deficient for A20 in T lineage cells, we show that thymic and peripheral Treg cell compartments are quantitatively enlarged because of a cell-intrinsic developmental advantage of A20-deficient thymic Treg differentiation...
October 1, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28829428/in-vitro-and-in-vivo-assessment-of-t-b-and-myeloid-cells-suppressive-activity-and-humoral-responses-from-transplant-recipients
#20
Séverine Bézie, Claire Usal, Carole Guillonneau
The main concern in transplantation is to achieve specific tolerance through induction of regulatory cells. The understanding of tolerance mechanisms requires reliable models. Here, we describe models of tolerance to cardiac allograft in rat, induced by blockade of costimulation signals or by upregulation of immunoregulatory molecules through gene transfer. Each of these models allowed in vivo generation of regulatory cells such as regulatory T cells (Tregs), regulatory B cells (Bregs) or regulatory myeloid cells (RegMCs)...
August 12, 2017: Journal of Visualized Experiments: JoVE
keyword
keyword
120528
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"