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Transplant Immunology

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https://www.readbyqxmd.com/read/28088367/assignment-of-c1q-binding-hla-antibodies-as-unacceptable-hla-antigens-avoids-positive-cdc-crossmatches-prior-to-transplantation-of-deceased-donor-organs
#1
David Juhl, Matthias Marget, Michael Hallensleben, Siegfried Görg, Malte Ziemann
Soon, a virtual crossmatch shall replace the complement-dependent cytotoxicity (CDC) allocation crossmatch in the Eurotransplant region. To prevent positive CDC-crossmatches in the recipient centre, careful definition of unacceptable antigens is necessary. For highly sensitized patients, this is difficult by CDC alone. Assignment of all antibodies detected by sensitive assays, however, could prevent organ allocation. To assess the usefulness of the Luminex C1q-assay to prevent positive CDC-crossmatches, all CDC-crossmatches performed prior to deceased kidney transplantation in a 16-month-period were reviewed...
January 11, 2017: Transplant Immunology
https://www.readbyqxmd.com/read/28077266/asp0028-in-combination-with-suboptimal-dose-of-tacrolimus-in-cynomolgus-monkey-renal-transplantation-model
#2
Hao Dun, Lijun Song, Anlun Ma, Yanxin Hu, Lin Zeng, Jieying Bai, Guangzhou Zhang, Liangyan Zhang, Kumi Koide, Yohei Okada, Kaori Hanaoka, Rie Yamamoto, Jun Hirose, Tatsuaki Morokata, Pierre Daloze, Huifang Chen
FTY720, a S1P-receptor modulator, has shown to be effective in several transplant and autoimmune disease models, via modulating lymphocyte homing into secondary lymphoid organs (SLOs), and thereby reducing these cells in peripheral blood. ASP0028, a newly developed S1P1/S1P5-selective agonist, presented comparable efficacy to FTY720 and wider safety margins than FTY720. In this study, we assessed the efficacy and safety of ASP0028 co-administered with suboptimal-dose of tacrolimus in the Cynomolgus monkey renal transplantation model...
January 7, 2017: Transplant Immunology
https://www.readbyqxmd.com/read/28017878/challenge-of-ex-vivo-stimulated-cd4-cd25-regulatory-t-cell-mediated-alloantigen-specific-immunosuppression-by-murine-cardiac-transplantation
#3
LETTER
Tomohide Hori, Shinji Uemoto, Kanako Saito, Kagemasa Kuribayashi, Yukinobu Hori, Takuma Kato
No abstract text is available yet for this article.
December 23, 2016: Transplant Immunology
https://www.readbyqxmd.com/read/28017877/negative-regulation-of-hla-dr-expression-on-endothelial-cells-by-anti-blood-group-a-b-antibody-ligation-and-mtor-inhibition
#4
Kenta Iwasaki, Yuko Miwa, Kazuharu Uchida, Yasuhiro Kodera, Takaaki Kobayashi
Donor-specific antibody (DSA), particularly against HLA class II, is a major cause of chronic antibody-mediated rejection (CAMR) after transplantation, although ABO-incompatible kidney transplantation has recently demonstrated favorable graft outcomes. The condition of no injury even in the presence of anti-donor antibody has been referred to as "accommodation", which would be one of the key factors for successful long-term graft survival. The purpose of this study was to analyze the beneficial effect of anti-blood group A/B antibody ligation on endothelial cells against HLA-DR antibody-mediated, complement-dependent cytotoxicity (CDC)...
December 23, 2016: Transplant Immunology
https://www.readbyqxmd.com/read/27979771/rapid-and-strong-de-novo-donor-specific-antibody-development-in-a-lung-transplant-recipient-short-communication-case-report
#5
Andrew L Lobashevsky, Kevin M Rosner, John D May, Michael D Duncan, Chadi A Hage, Erin N Lushin, Eve E Anderson, David W Roe
A 66-yo female patient (typed B*39:01, 44:02) underwent first left single lung transplant (typed B*81:01, 15:17) on 02/07/2016 with negative for DSA in current and historical samples. On 02/17/2016 strong de novo DSA (MFI=15,200, C1q+) to B81 were detected. The recipient has two children typed B*07:02, 44:02 B*27:03, 39:01, and had received multiple vaccinations. Twinrix, Zostavax and MMR vaccines contain viruses grown on live human lung fibroblasts (MRC-5, typed B*07:02, 44:02, and WI-38, typed B*08:01, 58:01)...
December 12, 2016: Transplant Immunology
https://www.readbyqxmd.com/read/27939210/studies-of-innate-immune-systems-against-human-cells
#6
Rieko Sakai, Etsuko Kitano, Akira Maeda, Pei-Chi Lo, Hiroshi Eguchi, Masahito Watanabe, Hiroshi Nagashima, Hiroomi Okuyama, Shuji Miyagawa
BACKGROUND: Pigs are frequently used as animal models for experiments in the surgical field, including allo- and xeno-transplantation. Regeneration studies, including studies dealing with human- and monkey-induced pluripotent stem cells (iPSC), have gradually progressed, with pigs sometimes being used as the scaffold. However, the immunological response of pigs against humans, especially innate immunities, remain unclear. This study reports on a comprehensive study of pig innate immunity against humans...
December 7, 2016: Transplant Immunology
https://www.readbyqxmd.com/read/27923603/repeated-human-leukocyte-antigen-mismatches-in-lung-re-transplantation
#7
Wiebke Sommer, Michael Hallensleben, Fabio Ius, Christian Kühn, Igor Tudorache, Murat Avsar, Jawad Salman, Thierry Siemeni, Mark Greer, Jens Gottlieb, Dietmar Boethig, Rainer Blasczyk, Axel Haverich, Gregor Warnecke
BACKGROUND: The role of HLA-sensitization in the absence of detectable DSA in lung re-transplantation is unclear. Antigens of the second donor matching the HLA typing of the first donor are considered 'unacceptable', by some tissue typing laboratories, especially in kidney re-transplantation. METHODS: Thus, we performed a retrospective analysis of all lung re-transplantations focussing on the impact of HLA-homologies between the first and the second donor ('unacceptable' antigens; repeated HLA mismatch) on patient and graft survival...
December 5, 2016: Transplant Immunology
https://www.readbyqxmd.com/read/27913276/association-of-genetic-polymorphisms-of-angiopoietin-like-4-with-severity-of-posttransplant-proteinuria-in-kidney-allograft-recipients
#8
Youngil Chang, Tariq Shah, Jaewook Yang, David I Min
BACKGROUND: Proteinuria is a hallmark of glomerular injury, and persistent proteinuria is associated with graft failure in kidney transplant patients. Recently, it is known that the level of circulating angiopoietin-like 4 (ANGPTL4) is elevated in the patients with human nephrotic syndrome, in which ANGPTL4 is responsible for relieving proteinuria. PURPOSE: The purpose of this study is to determine effects of clinical factors and genetic polymorphism of ANGPTL4 on proteinuria after kidney transplantation...
November 29, 2016: Transplant Immunology
https://www.readbyqxmd.com/read/27903445/increased-alloreactivity-and-adverse-outcomes-in-obese-kidney-transplant-recipients-are-limited-to-those-with-diabetes-mellitus
#9
Thomas Schachtner, Maik Stein, Petra Reinke
Previous studies on patient and allograft outcomes of obese kidney transplant recipients (KTRs) remain controversial. To what extent obesity-related comorbidities contribute to adverse outcomes, however, hasn't been addressed. We studied all KTRs from 2005 to 2012. 29 (4%), 317 (48%), 217 (33%), 76 (12%), and 21 KTRs (4%) were identified as underweight, normal-weight, overweight, obese, and morbid obese, respectively. 33 of 97 obese KTRs (34%) had pre-existent diabetes. Samples were collected before transplantation and at +1, +2, +3months posttransplantation...
November 27, 2016: Transplant Immunology
https://www.readbyqxmd.com/read/27888093/randomized-trial-of-ratg-daclizumab-vs-ratg-alemtuzumab-as-dual-induction-therapy-in-renal-transplantation-results-at-8years-of-follow-up
#10
Gaetano Ciancio, Jeffrey J Gaynor, Giselle Guerra, Junichiro Sageshima, David Roth, Linda Chen, Warren Kupin, Adela Mattiazzi, Lissett Tueros, Sandra Flores, Lois Hanson, Phillip Ruiz, Rodrigo Vianna, George W Burke
Our goal in using dual induction therapy is to bring the kidney transplant recipient closer (through more effectively timed lymphodepletion) to an optimally immunosuppressed state. Here, we report long-term results of a prospective randomized trial comparing (Group I,N=100) rATG/Dac (3 rATG, 2 Dac doses) vs. (Group II,N=100) rATG/Alemtuzumab(C1H) (1 dose each), using reduced tacrolimus dosing, EC-MPS, and early corticosteroid withdrawal. Lower EC-MPS dosing was targeted in Group II to avoid severe leukopenia...
November 22, 2016: Transplant Immunology
https://www.readbyqxmd.com/read/27871893/clinical-effects-of-pre-transplant-serum-25-hydroxyvitamin-d-level-on-post-transplant-immunologic-and-non-immunologic-outcomes-in-kidney-transplant-recipients
#11
Tae Hyun Ban, Jeong Ho Kim, Han Beol Jang, Yoon Seo Lee, Bum Soon Choi, Cheol Whee Park, Chul Woo Yang, Yong-Soo Kim, Byung Ha Chung
BACKGROUND: The aim of this study was to investigate the effects of pre-transplant serum 25-hydroxyvitamin D (25(OH)D) level on non-immunologic and immunologic aspects of post-transplant clinical outcomes in kidney transplant recipients (KTRs). METHODS: We investigated 174 KTRs with low immunologic risk at baseline. We divided the patients into three groups according to baseline serum 25(OH)D level and compared the post-transplant clinical outcomes of acute rejection, infectious complications, and osteoporosis among the groups...
November 18, 2016: Transplant Immunology
https://www.readbyqxmd.com/read/27867073/immune-status-assessment-in-adult-lung-transplant-candidates
#12
Diana A van Kessel, Thijs W Hoffman, Heleen van Velzen-Blad, Ed A van de Graaf, Jan C Grutters, Ger T Rijkers
BACKGROUND: Lung transplant recipients have an increased susceptibility to a variety of infections due to immunosuppressive therapy. Current guidelines recommend pneumococcal and other vaccinations, prior to lung transplantation to protect against post-transplant infections, but measurement of the antibody response to vaccination is not advised. Immune status investigation in lung transplant candidates, including the response to pneumococcal polysaccharide vaccination, has not been described...
November 17, 2016: Transplant 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
#13
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/27751764/evaluation-of-interleukin-12-and-cd56-lymphocyte-cells-in-pediatric-hematopoietic-stem-cell-transplantation-for-early-diagnosis-of-acute-graft-versus-host-disease
#14
Raziyeh Tootoonchian, Fatemeh Pak, Ali M Ardekani, Nasrin Sehati, Manuchehr Abedi-Valugerdi, Parviz Kokhaei
The present study tried to explain CD56+ lymphocyte cells activities and possible prognostic role of these cells in Graft-Versus-Host-Disease (GVHD). The role of IL-12 activation and function is of interest in this study. Peripheral blood samples of 51 Hematopoietic Stem Cell Transplantation (HSCT) recipients collected at before (day -8) and after (days 7 and 14). PBMC were collected by Ficoll separation and analyzed by Flow Cytometry using triple antibody (CD45-PerCP, CD56-FITC, and CD69-PE staining and control antibody...
November 2016: Transplant Immunology
https://www.readbyqxmd.com/read/27737799/the-role-of-recipient-derived-interleukin-17a-in-a-murine-orthotopic-lung-transplant-model-of-restrictive-chronic-lung-allograft-dysfunction
#15
Y Yamada, E Vandermeulen, T Heigl, J Somers, A Vaneylen, S E Verleden, H Bellon, S De Vleeschauwer, E K Verbeken, D E Van Raemdonck, R Vos, G M Verleden, W Jungraithmayr, B M Vanaudenaerde
The single most important cause of late mortality after lung transplantation is chronic lung allograft dysfunction (CLAD). However, the pathological development of CLAD was not as simple as previously presumed and subclassification phenotypes, bronchiolitis obliterans syndrome (BOS) and restrictive CLAD (rCLAD), have been introduced. We want to re-investigate how CLAD manifests in the murine orthotopic lung transplant model and investigate the role of interleukin 17A (IL-17A) within this model. Orthotopic LTx was performed in CB57BL/6, IL-17 WT and IL-17 KO mice...
November 2016: Transplant Immunology
https://www.readbyqxmd.com/read/27693310/the-selective-biomarker-il-8-identifies-ifta-after-kidney-transplantation-in-blood-cells
#16
Mareen Matz, Christine Lorkowski, Katharina Fabritius, Kaiyin Wu, Birgit Rudolph, Stefan Frischbutter, Susanne Brakemeier, Jens Gaedeke, Hans-H Neumayer, Mir-Farzin Mashreghi, Klemens Budde
Cellular and antibody-mediated rejection processes and also interstitial fibrosis/tubular atrophy (IFTA) lead to allograft dysfunction and loss. The search for accurate, specific and non-invasive diagnostic tools is still ongoing and essential for successful treatment of renal transplanted patients. Molecular markers in blood cells and serum may serve as diagnostic tools but studies with high patient numbers and differential groups are rare. We validated the potential value of several markers on mRNA level in blood cells and serum protein level in 166 samples from kidney transplanted patients under standard immunosuppressive therapy (steroids±mycophenolic acid±calcineurin inhibitor) with stable graft function, urinary tract infection (UTI), IFTA, antibody-mediated rejection (ABMR), and T-cell-mediated rejection (TCMR) applying RT-PCR and ELISA...
November 2016: Transplant Immunology
https://www.readbyqxmd.com/read/27663090/abo-incompatible-renal-transplantation-following-lung-transplantation
#17
G I Snell, A K Davis, S Menahem, S Kotecha, H M Whitford, B J Levvey, M Paraskeva, A Webb, G W Westall, R G Walker
We present management strategies utilised for the first case of an urgent live-donor ABO incompatible B blood group renal transplant, in a patient with a prior A blood group lung transplant for cystic fibrosis. Three years on, renal function is excellent and stable, whilst lung function has improved.
November 2016: Transplant Immunology
https://www.readbyqxmd.com/read/27663089/free-microrna-levels-in-plasma-distinguish-t-cell-mediated-rejection-from-stable-graft-function-after-kidney-transplantation
#18
Mareen Matz, Christine Lorkowski, Katharina Fabritius, Pawel Durek, Kaiyin Wu, Birgit Rudolph, Hans-H Neumayer, Mir-Farzin Mashreghi, Klemens Budde
The potential diagnostic value of circulating free miRNAs in plasma compared to miRNA expression in blood cells for rejection processes after kidney transplantation is largely unknown, but offers the potential for better and timely diagnosis of acute rejection. Free microRNA expression of specific blood cell markers was measured in 160 plasma samples from kidney transplant patients under standard immunosuppressive therapy (steroids±mycophenolic acid±calcineurin inhibitor) with stable graft function, urinary tract infection, interstitial fibrosis and tubular atrophy, antibody-mediated rejection (ABMR), Borderline (Banff3), tubulo-interstitial (Banff4-I) and vascular rejection (Banff4-II/III) applying RT-PCR...
November 2016: Transplant Immunology
https://www.readbyqxmd.com/read/27590486/reduction-of-obliterative-bronchiolitis-ob-by-prolyl-hydroxylase-inhibitors-activating-hypoxia-inducible-transcription-factors-in-an-experimental-mouse-model
#19
Christian Heim, Benjamin Motsch, Sabina Jalilova, Wanja M Bernhardt, Martina Ramsperger-Gleixner, Nicolai Burzlaff, Michael Weyand, Kai-Uwe Eckardt, Stephan M Ensminger
BACKGROUND: Obliterative bronchiolitis (OB) is the major limiting factor for long-term survival after lung transplantation. As previously shown, donor treatment with a PHD-inhibitor activating hypoxia-inducible transcription factors (HIFs) prevents graft injury both in an allogenic kidney and aortic allograft transplant model. The aim of this study was to investigate the effect of HIF activation with a PHD-inhibitor on the development of OB. METHODS: Fully MHC-mismatched C57BL/6 (H-2(b)) donor tracheas were orthotopically transplanted into CBA/J (H-2(k)) recipients...
November 2016: Transplant Immunology
https://www.readbyqxmd.com/read/27577170/t-cell-costimulation-blockade-for-hyperacute-steroid-refractory-graft-versus-host-disease-in-children-undergoing-haploidentical-transplantation
#20
Sarita Rani Jaiswal, Shamsuz Zaman, Aditi Chakrabarti, Amit Sehrawat, Satish Bansal, Mahesh Gupta, Suparno Chakrabarti
The outcome of hyperacute grade 3-4 steroid-refractory graft-versus-host-disease (SR-GVHD) remains dismal despite a plethora of agents being tried alone or in combination. Following T replete haploidentical transplantation with post-transplantation cyclophosphamide on 75 patients, 10 patients (13%) aged 2-20years, developed hyperacute SR-GVHD. We report on the outcome of two different regimens for treatment of SR-GVHD on the outcome of these patients. Five patients were treated in Regimen A consisting of anti-thymocyte globulin, Etanercept and Basiliximab...
November 2016: Transplant Immunology
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