keyword
MENU ▼
Read by QxMD icon Read
search

Belatacept

keyword
https://www.readbyqxmd.com/read/28316600/methylation-of-foxp3-tsdr-underlies-the-impaired-suppressive-function-of-tregs-from-long-term-belatacept-treated-kidney-transplant-patients
#1
Evelyn Katy Alvarez Salazar, Arimelek Cortés-Hernández, Germán Rodrigo Alemán-Muench, Josefina Alberú, Jesús R Rodríguez-Aguilera, Félix Recillas-Targa, Victoria Chagoya de Sánchez, Eric Cuevas, Eduardo Mancilla-Urrea, María Pérez García, Guillermo Mondragón-Ramírez, Mario Vilatobá, Ian Bostock, Erick Hernández-Méndez, David De Rungs, Eduardo A García-Zepeda, Gloria Soldevila
Regulatory T cells (Tregs) are considered key players in the prevention of allograft rejection in transplanted patients. Belatacept (BLT) is an effective alternative to calcineurin inhibitors that appears to preserve graft survival and function; however, the impact of this drug in the homeostasis of Tregs in transplanted patients remains controversial. Here, we analyzed the phenotype, function, and the epigenetic status of the Treg-specific demethylated region (TSDR) in FOXP3 of circulating Tregs from long-term kidney transplant patients under BLT or Cyclosporine A treatment...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28289708/interruption-of-ox40l-signaling-prevents-costimulation-blockade-resistant-allograft-rejection
#2
William H Kitchens, Ying Dong, David V Mathews, Cynthia P Breeden, Elizabeth Strobert, Maria E Fuentes, Christian P Larsen, Mandy L Ford, Andrew B Adams
The potential of costimulation blockade to serve as a novel transplant immunosuppression strategy has been explored for over 20 years, culminating in the recent clinical approval of belatacept for renal transplant patients. Despite improving long-term graft function and survival compared with calcineurin inhibitors, clinical acceptance of belatacept has been hindered by elevated rates of acute rejection. We examined the signaling pathways required to activate costimulation blockade-resistant alloreactive T cells and identified the OX40/OX40L secondary costimulatory pathway as a promising target...
March 9, 2017: JCI Insight
https://www.readbyqxmd.com/read/28267882/early-conversion-to-belatacept-after-renal-transplantation
#3
V Nair, L Liriano-Ward, R Kent, Shirish Huprikar, M Rana, S Florman, V Delaney, M Menon, V Sehgal, L Miko, R Khaim, A Benvenisty, S Lerner, A Arvelakis, V Wadhera, S Ames, R Shapiro
Belatacept is a non-nephrotoxic immunosuppressive agent, which may make it the ideal agent for patients with delayed or slow graft function on calcineurin inhibitors. There are limited data on conversion of patients to belatacept within 6 months of transplantation. Between 1/2012 and 12/2015 sixteen patients were converted to belatacept for delayed or poor graft function (eGFR <30 ml/min/1.73m, MDRD); three were HIV+. Conversion protocols were analyzed in patients < 4 months and 4-6 months post transplantation...
March 7, 2017: Clinical Transplantation
https://www.readbyqxmd.com/read/28166398/belatacept-after-kidney-transplantation-in-adolescents-a-retrospective-study
#4
Christian Lerch, Nele K Kanzelmeyer, Thurid Ahlenstiel-Grunow, Kerstin Froede, Martin Kreuzer, Jens Drube, Murielle Verboom, Lars Pape
Regardless of recipient age at kidney transplantation (KTx), patients are at greatest risk for graft loss in adolescence, partly due to non-adherence to an oral immunosuppressive regimen. Belatacept, a non-nephrotoxic, first-in-class immunosuppressant that inhibits co-stimulation of T-cells, requires intravenous application only every 4 weeks, potentially leading to better adherence. However, it is only approved for use in adults. We report here the findings of the first study of belatacept in adolescents, comprising all patients in our department switched to belatacept post-KTx...
February 6, 2017: Transplant International: Official Journal of the European Society for Organ Transplantation
https://www.readbyqxmd.com/read/28104134/eculizumab-and-belatacept-for-de-novo-atypical-hemolytic-uremic-syndrome-associated-with-cfhr3-cfhr1-deletion-in-a-kidney-transplant-recipient-a-case-report
#5
P Dedhia, A Govil, G Mogilishetty, R R Alloway, E S Woodle, B G Abu Jawdeh
BACKGROUND: Atypical hemolytic uremic syndrome (aHUS) is associated with significant morbidity and mortality and occurs due to genetic or acquired abnormalities that result in the dysregulation of the alternative complement pathway. CASE REPORT: We report a case of post-living kidney transplantation de novo aHUS in a setting of heterozygous deletion in the complement factor H-related protein (CFHR)3-CFHR1 gene. The aHUS episode was possibly triggered by antibody-mediated rejection or tacrolimus...
January 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/28078228/belatacept-in-renal-transplantation-quo-vadis
#6
COMMENT
Timm H Westhoff
No abstract text is available yet for this article.
December 2016: Translational Andrology and Urology
https://www.readbyqxmd.com/read/27996207/complete-regression-of-psoriatic-arthritis-after-belatacept-conversion-in-a-highly-hla-sensitized-kidney-transplant-patient
#7
M Meneghini, C Gómez, R Mast, E Melilli, J M Grinyó, O Bestard
Costimulatory inhibitors (i.e. abatacept and belatacept) effectively abrogate T lymphocyte activation and proliferation and have been shown to be effective for disease control in certain autoimmune disorders as well as in preventing allograft rejection in kidney transplantation. Whether such immunomodulatory agents may be useful for the control of autoimmune flares and allograft acceptance, while avoiding the need of additional strong immunosuppressants, has not been shown. Here, we report the first case of a 47-year-old man affected by a serious debilitating form of psoriatic arthritis that presented during the course of a third, high immunological-risk kidney transplantation...
December 20, 2016: American Journal of Transplantation
https://www.readbyqxmd.com/read/27941427/belatacept-compared-to-tacrolimus-for-kidney-transplantation-a-propensity-score-matched-cohort-study
#8
Jordana B Cohen, Kevin C Eddinger, Kimberly A Forde, Peter L Abt, Deirdre Sawinski
BACKGROUND: While tacrolimus is the basis of most maintenance immunosuppression regimens for kidney transplantation, concerns about toxicity have made alternative agents, such as belatacept, attractive to clinicians. However, limited data exists to directly compare outcomes with belatacept-based regimens to tacrolimus. METHODS: We performed a propensity score matched cohort study of adult kidney transplant recipients transplanted between May 1, 2001 and December 31, 2015 using national transplant registry data to compare patient and allograft survival in patients discharged from their index hospitalization on belatacept versus tacrolimus-based regimens...
December 8, 2016: Transplantation
https://www.readbyqxmd.com/read/27932157/belatacept-and-eculizumab-for-treatment-of-calcineurin-inhibitor-induced-thrombotic-microangiopathy-after-kidney-transplantation-case-report
#9
J Merola, P S Yoo, J Schaub, J D Smith, M I Rodriguez-Davalos, E Tichy, D C Mulligan, W Asch, R Formica, M Kashgarian, S Kulkarni
Thrombotic microangiopathy (TMA) after kidney transplantation is an uncommon and challenging cause of graft dysfunction and is associated with early graft loss. An idiosyncratic endothelial reaction to calcineurin inhibitors (CNIs) has been implicated as a frequent cause of TMA. This reaction is marked by uncontrolled activation of complement and subsequent cellular destruction. Usual therapy consists of withdrawal of the inciting drug and plasmapheresis to minimize levels of circulating complement. Recently, eculizumab, a monoclonal antibody to complement component C5, has been used for the treatment of atypical hemolytic uremic syndrome...
November 2016: Transplantation Proceedings
https://www.readbyqxmd.com/read/27932109/risk-evaluation-and-outcome-of-pneumocystis-jirovecii-pneumonia-in-kidney-transplant-patients
#10
S Brakemeier, M Dürr, F Bachmann, D Schmidt, J Gaedeke, K Budde
Pneumocystis jirovecii pneumonia (PJP) affects immunocompromised patients. As a result of effective prophylaxis in the 1st months after kidney transplantation, PJP is increasingly diagnosed in the long term after transplantation. The present study evaluates course and outcome of PJP in a single transplant center from 2010 to 2015. Twenty-three patients presented with PJP at a mean of 53.7 ± 50.2 months after transplantation. Of these, 3 patients underwent ABO-incompatible (ABO-i) living-donor transplantation and 3 patients were treated with the use of belatacept...
November 2016: Transplantation Proceedings
https://www.readbyqxmd.com/read/27889299/safety-and-efficacy-outcomes-3-years-after-switching-to-belatacept-from-a-calcineurin-inhibitor-in-kidney-transplant-recipients-results-from-a-phase-2-randomized-trial
#11
Josep M Grinyó, Maria Del Carmen Rial, Josefina Alberu, Steven M Steinberg, Roberto C Manfro, Georgy Nainan, Flavio Vincenti, Charlotte Jones-Burton, Nassim Kamar
BACKGROUND: In a phase 2 study, kidney transplant recipients of low immunologic risk who switched from a calcineurin inhibitor (CNI) to belatacept had improved kidney function at 12 months postconversion versus those continuing CNI therapy, with a low rate of acute rejection and no transplant loss. STUDY DESIGN: 36-month follow-up of the intention-to-treat population. SETTING & PARTICIPANTS: CNI-treated adult kidney transplant recipients with stable transplant function (estimated glomerular filtration rate [eGFR], 35-75mL/min/1...
November 23, 2016: American Journal of Kidney Diseases: the Official Journal of the National Kidney Foundation
https://www.readbyqxmd.com/read/27888551/selective-targeting-of-high-affinity-lfa-1-does-not-augment-costimulation-blockade-in-a-nonhuman-primate-renal-transplantation-model
#12
K P Samy, D J Anderson, D J Lo, M S Mulvihill, M Song, A B Farris, B S Parker, A L MacDonald, C Lu, T A Springer, S C Kachlany, K A Reimann, T How, F V Leopardi, K S Franke, K D Williams, B H Collins, A D Kirk
Costimulation blockade (CoB) via belatacept is a lower-morbidity alternative to calcineurin inhibitor (CNI)-based immunosuppression. However, it has higher rates of early acute rejection. These early rejections are mediated in part by memory T cells, which have reduced dependence on the pathway targeted by belatacept and increased adhesion molecule expression. One such molecule is leukocyte function antigen (LFA)-1. LFA-1 exists in two forms: a commonly expressed, low-affinity form and a transient, high-affinity form, expressed only during activation...
November 26, 2016: American Journal of Transplantation
https://www.readbyqxmd.com/read/27881707/a-cd80-biased-ctla4-ig-fusion-protein-with-superior-in-vivo-efficacy-by-simultaneous-engineering-of-affinity-selectivity-stability-and-fcrn-binding
#13
Julie Douthwaite, Jacques Moisan, Cyril Privezentzev, Blagoje Soskic, Shereen Sabbah, Suzanne Cohen, Andie Collinson, Elizabeth England, Catherine Huntington, Ben Kemp, Li Zhuang, Suzanne Hudak, D Gareth Rees, Debbie Goldberg, Chris Barton, Linda Chang, Inna Vainshtein, Meina Liang, Laurie Iciek, Philip Ambery, Mark Peakman, Tristan J Vaughan, Tim I M Tree, David M Sansom, Michael A Bowen, Ralph R Minter, Lutz Jermutus
Affinity- and stability-engineered variants of CTLA4-Ig fusion molecules with enhanced pharmacokinetic profiles could yield improved therapies with the potential of higher efficacy and greater convenience to patients. In this study, to our knowledge, we have, for the first time, used in vitro evolution to simultaneously optimize CTLA4 affinity and stability. We selected for improved binding to both ligands, CD80 and CD86, and screened as dimeric Fc fusions directly in functional assays to identify variants with stronger suppression of in vitro T cell activation...
January 1, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/27861289/the-effect-of-asp2409-a-novel-cd86-selective-variant-of-ctla4-ig-on-renal-allograft-rejection-in-nonhuman-primates
#14
Shinsuke Oshima, Erik E Karrer, Yuka Kawato, Masashi Maeda, Hidehiko Fukahori, Susumu Tsujimoto, Jun Hirose, Koji Nakamura, Takanori Marui, Fujiko Takamura, Takahisa Noto, Steven J Chapin, Yasutomo Fujii, Margaret Neighbors, Sridhar Viswanathan, Bruce H Devens, Yasuyuki Higashi
BACKGROUND: Blockade of CD28-mediated T cell costimulation by a modified cytotoxic T lymphocyte-associated antigen 4 (CTLA4-Ig), belatacept, is a clinically effective immunosuppressive therapy for the prevention of renal allograft rejection. Use of belatacept-based calcineurin inhibitor-free immunosuppression, however, has demonstrated an increased frequency of cellular rejection episodes and immunosuppression-related safety issues relative to conventional regimens. Furthermore, belatacept typically requires infusion for its administration chronically, which may present an inconvenience to patients...
December 2016: Transplantation
https://www.readbyqxmd.com/read/27847589/belatacept-conversion-in-african-american-kidney-transplant-recipients-with-severe-renal-dysfunction
#15
Heather S Snyder, Benjamin T Duhart, Amy G Krauss, Vinaya Rao
OBJECTIVES: Conversion from calcineurin inhibitor-based maintenance immunosuppression to belatacept in kidney transplant recipients has been demonstrated to improve renal function while maintaining efficacy against rejection. However, conversion studies to date have excluded patients with an estimated glomerular filtration rate < 35 mL/min/1.73 m(2). METHODS: We describe two patients with an estimated glomerular filtration rate < 30 mL/min/1.73 m(2) who underwent conversion from maintenance calcineurin inhibitor to belatacept...
2016: SAGE open medical case reports
https://www.readbyqxmd.com/read/27742385/costimulatory-blockade-and-use-of-mtor-inhibitors-avoiding-injury-part-2
#16
REVIEW
David Wojciechowski, Flavio Vincenti
Kidney transplantation immunosuppression relies on a calcineurin inhibitor backbone. Calcineurin inhibitors have reduced early-acute rejection rates but failed to improve long-term allograft survival. Their nephrotoxicity has shifted the focus of investigation to calcineurin inhibitor-free regimens. Costimulation blockade with belatacept, a second generation, higher avidity variant of CTLA4-Ig, has emerged as part of a calcineurin inhibitor-free regimen. Belatacept has demonstrated superior glomerular filtration rate compared with calcineurin inhibitors albeit with an increased risk of early and histologically severe rejection...
September 2016: Advances in Chronic Kidney Disease
https://www.readbyqxmd.com/read/27742383/immunosuppression-minimization-and-avoidance-protocols-when-less-is-not-more
#17
REVIEW
Rohini Prashar, K K Venkat
Kidney transplantation is well established as the best treatment option for end-stage kidney disease. It confers not only a better quality of life but also a significant survival advantage compared to dialysis. However, despite significant improvement in short-term kidney transplant graft survival over the past three decades, long-term graft survival remains suboptimal. Concerns about the possible contribution of chronic calcineurin inhibitor (CNI) nephrotoxicity to late allograft failure and other serious adverse effects of currently used immunosuppressive agents (especially corticosteroids) have led to increasing interest in developing regimens which may better preserve kidney allograft function and minimize other immunosuppression-related problems without increasing the risk of rejection...
September 2016: Advances in Chronic Kidney Disease
https://www.readbyqxmd.com/read/27662596/immunosuppressive-effect-of-asp2408-a-novel-cd86-selective-variant-of-ctla4-ig-in-rats-and-cynomolgus-monkeys
#18
Shinsuke Oshima, Yasutomo Fujii, Erik E Karrer, Fujiko Takamura, Steven J Chapin, Margaret Neighbors, Sridhar Viswanathan, Bruce H Devens, Yasuyuki Higashi, Hidekazu Mizuhara
The CTLA4-Ig fusion proteins abatacept and belatacept inhibit CD28-mediated T cell activation by binding CD80 (B7-1) and CD86 (B7-2) costimulatory ligands and are clinically proven immunosuppressants used for rheumatoid arthritis and renal transplantation, respectively. Abatacept and belatacept preferentially bind CD80, yet CD86 has been implicated as the dominant ligand for CD28-mediated costimulation of T cells. We investigated the immunosuppressive effects of ASP2408, a novel CTLA4-Ig with CD86 selectivity and high potency created by directed evolution methods...
November 2016: International Immunopharmacology
https://www.readbyqxmd.com/read/27598231/asp2409-a-next-generation-ctla4-ig-versus-belatacept-in-renal-allograft-survival-in-cynomolgus-monkeys
#19
L Song, A Ma, H Dun, Y Hu, Y Fujii, F Kinugasa, S Oshima, Y Higashi, P Daloze, H Chen
Belatacept is the first costimulatory blockade agent approved for maintenance immunosuppression in kidney transplant recipients. Clinical results have indicated that belatacept is associated with superior renal function and improved metabolic profile; however, higher incidence of acute rejection and posttransplant lymphoproliferative disorder are the shortcomings of this agent. In this study, ASP2409, a new cytotoxic T-lymphocyte associated protein 4-immunoglobulin possessing 14-fold higher in vitro CD86 binding affinity than belatacept, was tested for renal allograft survival in cynomolgus monkeys...
March 2017: American Journal of Transplantation
https://www.readbyqxmd.com/read/27591335/costimulation-blockade-in-autoimmunity-and-transplantation-the-cd28-pathway
#20
Andrew B Adams, Mandy L Ford, Christian P Larsen
T cell activation is a complex process that requires multiple cell signaling pathways, including a primary recognition signal and additional costimulatory signals. TCR signaling in the absence of costimulatory signals can lead to an abortive attempt at activation and subsequent anergy. One of the best-characterized costimulatory pathways includes the Ig superfamily members CD28 and CTLA-4 and their ligands CD80 and CD86. The development of the fusion protein CTLA-4-Ig as an experimental and subsequent therapeutic tool is one of the major success stories in modern immunology...
September 15, 2016: Journal of Immunology: Official Journal of the American Association of Immunologists
keyword
keyword
18337
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"