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Foxp3 transplant

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https://www.readbyqxmd.com/read/28086772/scutellaria-barbata-d-don-extract-inhibits-the-tumor-growth-through-down-regulating-of-treg-cells-and-manipulating-th1-th17-immune-response-in-hepatoma-h22-bearing-mice
#1
Xuefeng Kan, Wanli Zhang, Ruxu You, Yanfeng Niu, Jianrong Guo, Jun Xue
BACKGROUND: Previous studies showed Scutellaria barbata D. Don extract (SBE) is a potent inhibitor in hepatoma and could improve immune function of hepatoma H22-bearing mice. However, the immunomodulatory function of SBE on the tumor growth of hepatoma remains unclear. This study aimed to investigate the anti-tumor effects of SBE on hepatoma H22-bearing mice and explore the underlying immunomodulatory function. METHODS: The hepatoma H22-bearing mice were treated by SBE for 30 days...
January 13, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28051798/%C3%A2-conversion-to-mycophenolate-mofetil-monotherapy-in-liver-recipients-calcineurin-inhibitor-levels-are-key
#2
Blanca Norero, Carolina A Serrano, Alberto Sanchez-Fueyo, Ignacio Duarte, Javiera Torres, Mauricio Ocquetau, Francisco Barrera, Marco Arrese, Alejandro Soza, Carlos Benítez
 The use of calcineurin inhibitors (CNI) after liver transplantation is associated with post-transplant nephrotoxicity. Conversion to mycophenolate mofetil (MMF) monotherapy improves renal function, but is related to graft rejection in some recipients. Our aim was to identify variables associated with rejection after conversion to MMF monotherapy. Conversion was attempted in 40 liver transplant recipients. Clinical variables were determined and peripheral mononuclear blood cells were immunophenotyped during a 12-month follow-up...
January 2017: Annals of Hepatology
https://www.readbyqxmd.com/read/28049555/foxp3-positive-regulatory-t-cells-and-kidney-allograft%C3%A2-tolerance
#3
REVIEW
Alessandro Alessandrini, Laurence A Turka
Normal immune homeostasis is achieved by several mechanisms, and prominent among them is immunoregulation. Although several types of regulatory lymphocyte populations have been described, CD4 T cells expressing the FOXP3 transcription factor (FOXP3-positive regulatory T cells [FOXP3(+) Tregs]) are the best understood. This population of cells is critical for maintaining self-tolerance throughout the life of the organism. FOXP3(+) Tregs can develop within the thymus, but also under select circumstances, naive peripheral T cells can be induced to express FOXP3 and become stable Tregs as well...
December 31, 2016: American Journal of Kidney Diseases: the Official Journal of the National Kidney Foundation
https://www.readbyqxmd.com/read/28007665/cd25-blockade-delays-regulatory-t-cell-reconstitution-and-does-not-prevent-graft-versus-host-disease-after-allogeneic-hematopoietic-cell-transplantation
#4
Frederick L Locke, Joseph Pidala, Barry Storer, Paul J Martin, Michael A Pulsipher, Thomas R Chauncey, Niels Jacobsen, Nicolaus Kröger, Irwin Walker, Susan Light, Bronwen E Shaw, Francisca Beato, Ginna G Laport, Auayporn Nademanee, Armand Keating, Gerard Socie, Claudio Anasetti
Daclizumab, a humanized monoclonal antibody, binds CD25 and blocks formation of the IL-2 receptor on T cells. A study of daclizumab as acute graft-versus-host disease (GVHD) prophylaxis after unrelated bone marrow transplantation was conducted before the importance of CD25(+)FOXP3(+) regulatory T cells (Tregs) was recognized. Tregs can abrogate the onset of GVHD. The relation between Tregs and a graft-versus-malignancy effect is not fully understood. An international, multicenter, double-blind clinical trial randomized 210 adult or pediatric patients to receive 5 weekly doses of daclizumab at 0...
December 19, 2016: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/28006867/differential-profile-of-activated-regulatory-t-cell-subsets-and-micrornas-in-tolerant-liver-transplant-recipients
#5
B Revilla-Nuin, A de Bejar, L Martínez-Alarcón, J I Herrero, C M Martínez-Cáceres, P Ramírez, A Baroja-Mazo, J A Pons
: Regulatory T cells (Tregs) play a potential role in operational tolerance in liver transplant patients, and microRNAs (miRNAs) are known to be involved in immunological responses and tolerance. Thus, we analyzed the implication of different peripheral blood Treg subsets and miRNAs on liver transplantation tolerance in 24 tolerant (Tol) and 23 non-tolerant (non-Tol) liver transplant recipients by cellular, genetic and epigenetic approximation. Non-Tol patients had a lower demethylation rate of the FOXP3 Treg-specific demethylated region (TSDR) than Tol patients that correlated with the frequency of circulating Tregs...
December 22, 2016: Liver Transplantation
https://www.readbyqxmd.com/read/28006781/allogeneic-compact-bone-derived-mesenchymal-stem-cell-transplantation-attenuates-the-severity-of-idiopathic-pneumonia-syndrome-in-a-murine-bone-marrow-transplantation-model
#6
Shu-Kai Qiao, Han-Yun Ren, Yong-Jin Shi, Wei Liu
BACKGROUND/AIMS: Idiopathic pneumonia syndrome (IPS) is a serious and life-threatening lung complication following allogeneic hematopoietic stem cell transplantation (allo-HSCT) and currently no effective therapies exist. This study was designed to determine whether transplantation of allogeneic murine compact bone derived- mesenchymal stem cells (CB-MSCs) could prevent the development of IPS. METHODS: We tested the effects of CB-MSCs transplantation on IPS using an established murine model of C57BL/6 (H-2b)→BALB/c (H-2d)...
2016: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28002569/protective-role-of-icos-and-icos-ligand-in-corneal-transplantation-and-in-maintenance-of-immune-privilege
#7
Tomoyuki Kunishige, Hiroko Taniguchi, Misao Terada, Hisaya Akiba, Hideo Yagita, Ryo Abe, Junko Hori
Purpose: The interaction between the inducible costimulatory molecule (ICOS) and ICOS ligand (ICOSL) has been implicated in the differentiation and functions of T cells. The purpose of the present study was to determine the role of ICOS-ICOSL in the immune privilege of corneal allografts. Methods: Expression of ICOS and ICOSL mRNA from mouse eyes was assessed by RT-PCR. Corneas of C57BL/6 mice were orthotopically transplanted into the eyes of ICOS-/- BALB/c recipients and BALB/c wild-type (WT) recipients treated with anti-ICOSL mAb, and graft survival was assessed...
December 1, 2016: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/27999239/effect-of-mesenchymal-stem-cells-on-ilt3-expression-in-the-splenocytes-of-skin-graft-recipient-mice
#8
Ali Moravej, Mohammad-Hossein Karimi, Bita Geramizadeh, Mahdokht Hossein Aghdaie, Omid Kohi-Hoseinabadi, Salimeh Ebrahimnezhad
BACKGROUND: Mesenchymal stem cells (MSCs) are considered as effective therapeutic cells in transplantation due to their immunomodulatory activities. However, precise mechanism of MSCs immunomodulatory activity is not completely understood. OBJECTIVES: To study the role of Immunoglobulin-like transcripts-3 (ILT3) immunomodulatory receptor in immune tolerance induced by MSCs in skin transplantation model and induction of tolerogenic dendritic cells (Tol-DCs) by MSCs through up-regulation of ILT3...
December 2016: Iranian Journal of Immunology: IJI
https://www.readbyqxmd.com/read/27994068/resetting-microbiota-by-lactobacillus-reuteri-inhibits-t-reg-deficiency-induced-autoimmunity-via-adenosine-a2a-receptors
#9
Baokun He, Thomas K Hoang, Ting Wang, Michael Ferris, Christopher M Taylor, Xiangjun Tian, Meng Luo, Dat Q Tran, Jain Zhou, Nina Tatevian, Fayong Luo, Jose G Molina, Michael R Blackburn, Thomas H Gomez, Stefan Roos, J Marc Rhoads, Yuying Liu
Regulatory T (T reg) cell deficiency causes lethal, CD4(+) T cell-driven autoimmune diseases. Stem cell transplantation is used to treat these diseases, but this procedure is limited by the availability of a suitable donor. The intestinal microbiota drives host immune homeostasis by regulating the differentiation and expansion of T reg, Th1, and Th2 cells. It is currently unclear if T reg cell deficiency-mediated autoimmune disorders can be treated by targeting the enteric microbiota. Here, we demonstrate that Foxp3(+) T reg cell deficiency results in gut microbial dysbiosis and autoimmunity over the lifespan of scurfy (SF) mouse...
January 2017: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/27990144/glucose-regulated-protein-78-induced-myeloid-antigen-presenting-cells-maintained-tolerogenic-signature-upon-lps-stimulation
#10
Muyang Yang, Fan Zhang, Kai Qin, Min Wu, Heli Li, Huifen Zhu, Qin Ning, Ping Lei, Guanxin Shen
The 78-kDa glucose-regulated protein (Grp78) is stress-inducible chaperone that mostly reside in the endoplasmic reticulum. Grp78 has been described to be released at times of cellular stress and as having extracellular properties that are anti-inflammatory or favor the resolution of inflammation. As antigen-presenting cells (APCs) play a critical role in both the priming of adaptive immune responses and the induction of self-tolerance, herein, we investigated the effect of Grp78 on the maturation of murine myeloid APCs (CD11c(+) cells)...
2016: Frontiers in Immunology
https://www.readbyqxmd.com/read/27989714/ifny-and-ifny-treg-subsets-with-stable-and-unstable-foxp3-expression-in-kidney-transplant-recipients-with-good-long-term-graft-function
#11
Karina Trojan, Christian Unterrainer, Mostafa Aly, Li Zhu, Rolf Weimer, Nuray Bulut, Christian Morath, Gerhard Opelz, Volker Daniel
BACKGROUND: Treg are a heterogenous cell population. In the present study we attempted to identify Treg subsets that might contribute to stable and good long-term graft function. METHOD: Lymphocyte and Treg subsets were studied in 136 kidney transplant recipients with good long-term graft function and in 52 healthy control individuals using eight-color-fluorescence flow cytometry. Foxp3 TSDR methylation status was investigated in enriched IFNy+ and IFNy- Treg preparations using high resolution melt analysis...
October 29, 2016: Transplant Immunology
https://www.readbyqxmd.com/read/27988212/natural-regulatory-t-cells-from-patients-with-end-stage-renal-disease-can-be-used-for-large-scale%C3%A2-generation-of-highly-suppressive-alloantigen-specific-tregs
#12
Nicolle H R Litjens, Karin Boer, Joke M Zuijderwijk, Mariska Klepper, Annemiek M A Peeters, Wenda Verschoor, Rens Kraaijeveld, Michiel G H Betjes
Natural occurring regulatory T cells (nTregs) have the potential to offer a targeted approach of immunosuppression and are the cell type of interest for inducing tolerance in kidney transplantation. End-stage renal disease (ESRD) profoundly affects the composition and function of circulating T cells but little is known with respect to how nTreg potential is affected. To address this, nTregs of patients with ESRD (on dialysis or not) and healthy individuals were isolated, expanded using allogeneic mature monocyte-derived dendritic cells followed by anti-CD3/anti-CD28-coated beads and the different nTregs were extensively characterized by the demethylation status of the Treg-specific demethylated region within FOXP3 and expression of typical nTreg markers...
December 14, 2016: Kidney International
https://www.readbyqxmd.com/read/27984277/impact-of-hyperlipidemia-on-alloimmunity
#13
Jessamyn Bagley, Jin Yuan, John Iacomini
PURPOSE OF REVIEW: Hyperlipidemia is a comorbidity affecting a significant number of transplant patients despite treatment with cholesterol lowering drugs. Recently, it has been shown that hyperlipidemia can significantly alter T-cell responses to cardiac allografts in mice, and graft rejection is accelerated in dyslipidemic mice. Here, we review recent advances in our understanding of hyperlipidemia in graft rejection. RECENT FINDINGS: Hyperlipidemic mice have significant increases in serum levels of proinflammatory cytokines, and neutralization of interleukin 17 (IL-17) slows graft rejection, suggesting that IL-17 production by Th17 cells was necessary but not sufficient for rejection...
February 2017: Current Opinion in Organ Transplantation
https://www.readbyqxmd.com/read/27942862/altered-immune-reconstitution-of-b-and-t-cells-precedes-the-onset-of-clinical-symptoms-of-chronic-graft-versus-host-disease-and-is-influenced-by-the-type-of-onset
#14
E-M Bohmann, U Fehn, B Holler, D Weber, E Holler, W Herr, P Hoffmann, M Edinger, D Wolff
We analyzed lymphocyte subpopulations and cytokines 3 months after allogeneic hematopoietic stem cell transplantation aiming to identify predictive cellular and serum markers for chronic graft-versus-host disease (cGVHD). Samples of 49 patients (pts) (no cGVHD (n = 14), subsequent quiescent onset (n = 16), de novo onset of cGVHD (n = 19)) were analyzed in the absence of active GVHD by flow cytometry and enzyme-linked immunosorbent assay. All mean absolute cell counts are presented as cells per microliter; relative cell counts are presented as percentage of lymphocytes...
December 9, 2016: Annals of Hematology
https://www.readbyqxmd.com/read/27939405/foxp3-regulatory-t-cell-ameliorates-microvasculature-in-the-rejection-of-mouse-orthotopic-tracheal-transplants
#15
Mohammad Afzal Khan, Fatimah Alanazi, Hala Abdalrahman Ahmed, Falah Hassan Al-Mohanna, Abdullah Mohammed Assiri, Dieter Clemens Broering
Microvascular loss may be a root cause of chronic rejection in lung transplants, which leads to the bronchiolitis obliterans syndrome. Previous research implicates T regulatory cell (Treg) as a key component of immune modulation, however, Treg has never been examined as a reparative mediator to salvage microvasculature during transplantation. Here, we reconstituted purified Tregs in to allografts, and serially monitored allografts for tissue oxygenation, microvascular perfusion for four weeks. We demonstrated that Tregs reconstitution of allografts significantly improve tissue oxygenation, microvascular flow, epithelial repair, number of CD4(+)CD25(high)FOXP3(+) Tregs, followed by an upregulation of proinflammatory, angiogenic and regulatory genes, while prevented subepithelial deposition of CD4(+)T cells at d10, and collagen at d28 post-transplantation...
December 9, 2016: Clinical Immunology: the Official Journal of the Clinical Immunology Society
https://www.readbyqxmd.com/read/27931084/association-of-higher-cd4-cd25-high-cd127-low-foxp3-and-il-2-t-cell-frequencies-early-after-lung-transplantation-with-less-chronic-lung-allograft-dysfunction-at-two-years
#16
J Salman, F Ius, A-K Knoefel, W Sommer, Th Siemeni, C Kuehn, I Tudorache, M Avsar, T Nakagiri, G Preissler, R Hatz, M Greer, T Welte, A Haverich, G Warnecke
Regulatory T cells (Treg) can regulate alloantigens and may counteract chronic lung allograft dysfunction (CLAD) in lung transplantation. We analyzed Treg in peripheral blood prospectively and correlated percentages of subpopulations with the incidence of CLAD at two years. Among lung-transplanted patients between 01/2009 and 07/2011, only patients with sufficient Treg measurements were included into the study. Tregs were measured immediately before lung transplantation, at 3 weeks and 3, 6, 12 and 24 months after transplantation and were defined as CD4(+) CD25(high) T cells and further analyzed for CTLA4, CD127, FoxP3 and IL-2 expressions...
December 8, 2016: American Journal of Transplantation
https://www.readbyqxmd.com/read/27887864/optimization-of-cgmp-purification-and-expansion-of-umbilical-cord-blood-derived-t-regulatory-cells-in-support-of-first-in-human-clinical-trials
#17
David H McKenna, Darin Sumstad, Diane M Kadidlo, Bjorn Batdorf, Colin J Lord, Sarah C Merkel, Christine M Koellner, Julie M Curtsinger, Carl H June, James L Riley, Bruce L Levine, Jeffrey S Miller, Claudio G Brunstein, John E Wagner, Bruce R Blazar, Keli L Hippen
BACKGROUND AIMS: Thymic-derived regulatory T cells (tTreg) are critical regulators of the immune system. Adoptive tTreg transfer is a curative therapy for murine models of autoimmunity, graft rejection, and graft-versus-host disease (GVHD). We previously completed a "first-in-human" clinical trial using in vitro expanded umbilical cord blood (UCB)-derived tTreg to prevent GVHD in patients undergoing UCB hematopoietic stem cell transplantation (HSCT). tTreg were safe and demonstrated clinical efficacy, but low yield prevented further dose escalation...
February 2017: Cytotherapy
https://www.readbyqxmd.com/read/27879269/basophils-promote-tumor-rejection-via-chemotaxis-and-infiltration-of-cd8-t-cells
#18
Ibrahim M Sektioglu, Rafael Carretero, Nadja Bulbuc, Tobias Bald, Thomas Tüting, Alexander Y Rudensky, Günter J Hämmerling
Elevated numbers of regulatory T-cells (Tregs) in patient tumors are known to inhibit efficient anti-tumor T-cell responses. To study the mechanisms controlling tumor rejection, we assessed different mouse models for Treg depletion. In Foxp3DTR knock-in mice, about 99% Treg depletion was achieved, resulting in complete rejection of transplanted HCmel12 melanomas in a CD8+ T cell-dependent way. In contrast, about 90% Treg depletion obtained in BAC transgenic Foxp3.LuciDTR4 mice failed to induce complete rejection of HCmel12 melanomas, demonstrating that residual Tregs were able to control CD8+ T cell responses against the tumor...
November 22, 2016: Cancer Research
https://www.readbyqxmd.com/read/27878248/immunomodulatory-effects-of-ox40ig-gene-modified-adipose-tissue-derived-mesenchymal-stem-cells-on-rat-kidney-transplantation
#19
Tao Liu, Yue Zhang, Zhongyang Shen, Xunfeng Zou, Xiaobo Chen, Li Chen, Yuliang Wang
Recent studies have suggested that adipose tissue-derived mesenchymal stem cell (ADSC) therapy and OX40 costimulation blockade are two immunomodulatory strategies used to suppress the immune response to alloantigens. However, relatively little has been reported regarding the immunomodulatory potential of the abilityof these two strategies to synergize. Thus, in the present study, we aimed to investigate OX40-Ig fusion protein (OX40Ig) expression in ADSCs and to validate their more potent immunosuppressive activity in preventing renal allograft rejection...
January 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/27871261/quantitative-characterization-of-t-cell-repertoire-and-biomarkers-in-kidney-transplant-rejection
#20
Houda Alachkar, Martin Mutonga, Taigo Kato, Sowjanya Kalluri, Yoichi Kakuta, Motohide Uemura, Ryoichi Imamura, Norio Nonomura, Vikas Vujjini, Sami Alasfar, Hamid Rabb, Yusuke Nakamura, Nada Alachkar
BACKGROUND: T-cell-mediated rejection (TCMR) remains a major cause of kidney allograft failure. The characterization of T-cell repertoire in different immunological disorders has emerged recently as a novel tool with significant implications. We herein sought to characterize T-cell repertoire using next generation sequencing to diagnose TCMR. METHODS: In this prospective study, we analyzed samples from 50 kidney transplant recipients. We collected blood and kidney transplant biopsy samples at sequential time points before and post transplant...
November 21, 2016: BMC Nephrology
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