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Transplant rejection

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https://www.readbyqxmd.com/read/28538652/association-between-delayed-graft-function-and-graft-loss-in-donation-after-cardiac-death-kidney-transplants-a-paired-kidney-registry-analysis
#1
Wai H Lim, Stephen P McDonald, Graeme R Russ, Jeremy R Chapman, Maggie Km Ma, Henry Pleass, Bryon Jaques, Germaine Wong
BACKGROUND: Delayed graft function (DGF) is an established complication after donation after cardiac death (DCD) kidney transplants, but the impact of DGF on graft outcomes is uncertain. To minimize donor variability and bias, a paired donor kidney analysis was undertaken where 1 kidney developed DGF and the other did not develop DGF using data from the Australia and New Zealand Dialysis and Transplant Registry. METHODS: Using paired DCD kidney data from the Australia and New Zealand Dialysis and Transplant Registry, we examined the association between DGF, graft and patient outcomes between 1994 and 2012 using adjusted Cox regression models...
June 2017: Transplantation
https://www.readbyqxmd.com/read/28538050/molecular-imaging-of-acute-cardiac-transplant-rejection-animal-experiments-and-prospects
#2
Yihan Chen, Li Zhang, Jinfeng Liu, Pingyu Zhang, Xiaoyuan Chen, Mingxing Xie
Acute rejection (AR) remains the biggest challenge during the 1st year after heart transplantation despite advances in immunosuppressive therapy. The early detection and curbing of AR are crucial to the survival of transplant recipients. However, as the gold standard for AR, endomyocardial biopsy has several limitations because of its inherent invasiveness and morbidity. Traditional imaging techniques such as echocardiography and cardiac magnetic resonance imaging are of certain value for AR, but their diagnostic criteria and accuracy remain in question...
May 19, 2017: Transplantation
https://www.readbyqxmd.com/read/28535529/looking-into-the-graft-without-a-biopsy-biomarkers-of-acute-rejection-in-renal-transplantation
#3
Andrea Angeletti, Paolo Cravedi
Immunosuppression in kidney transplantation is still largely driven by center-specific protocols and adjusted according to the presence of graft dysfunction, drug toxicity or infection. Due to the current inability to titrate immunosuppression to the needs of every single patient, this approach is burdened by an increased risk of under or over-immunosuppression. To extend allograft survival, immunosuppression should be decided based on reliable biomarkers capable of quantifying the alloimmune response and/or noninvasively diagnosing acute rejection...
2017: Contributions to Nephrology
https://www.readbyqxmd.com/read/28535528/chronic-allograft-injury-an-overview-of-pathogenesis-and-treatment-strategies
#4
Hector M Madariaga, Leonardo V Riella
Chronic allograft injury (CAI) remains one of the biggest challenges in transplantation as it directly affects the long-term allograft survival, an area in which the scientific and transplantation communities have struggled to improve outcomes. Therefore, understanding the mechanisms of CAI is paramount to implement preventive measures and novel therapeutic options. In this review, we will address the latest evidence on CAI, potential etiologies and risk factors including non-adherence, antibody-mediated rejection, recurrence of glomerular disease, BK nephropathy, and calcineurin nephrotoxicity...
2017: Contributions to Nephrology
https://www.readbyqxmd.com/read/28535527/treatment-of-acute-antibody-mediated-rejection
#5
Giorgia Comai, Matteo Ravaioli, Olga Baraldi, Vania Cuna, Lorenzo Gasperoni, Giovanni Liviano D''Arcangelo, Maria Cappuccilli, Antonio D Pinna, Claudio Ronco, Gaetano La Manna
Acute antibody-mediated rejection (AMR) remains an important challenge in the field of kidney transplantation despite the advances in immunosuppressive strategies, and has been recognized as an important cause of allograft dysfunction and graft loss. The treatments of acute AMR are not standardized and poor evidence is currently available on the effectiveness of therapy regimens with combinations of drugs. Standard treatment for acute AMR is based on 3 cornerstones: removal of donor-specific antibodies (DSAs) from the bloodstream, reduction of DSAs synthesis, and inhibition of the interaction between DSAs and human leukocyte antigen antigens on donor's cells...
2017: Contributions to Nephrology
https://www.readbyqxmd.com/read/28533501/post-transplant-diabetes-mellitus-after-kidney-transplant-in-hispanics-and-caucasians-treated-with-tacrolimus-based-immunosuppression
#6
Pedro W Baron, Sergio Infante, Regina Peters, Jerusalem Tilahun, Jill Weissman, Lauren Delgado, Arputharaj Higgins Kore, W Lawrence Beeson, Michael E de Vera
BACKGROUND Development of post-transplant diabetes mellitus after kidney transplant (PTDM) significantly increases kidney graft loss and mortality. Several risk factors for PTDM have been reported, including Hispanic ethnicity and the use of calcineurin inhibitors and corticosteroids. The incidence and impact of PTDM in the Hispanic kidney transplant population is unknown. MATERIAL AND METHODS We retrospectively reviewed the medical records of 155 Hispanic and 124 Caucasian patients, who were not diabetics and underwent kidney transplant between January 2006 and December 2011...
May 23, 2017: Annals of Transplantation: Quarterly of the Polish Transplantation Society
https://www.readbyqxmd.com/read/28532691/bio-synthetic-materials-for-immunomodulation-of-islet-transplants
#7
Greg A Foster, Andrés J García
Clinical islet transplantation is an effective therapy in restoring physiological glycemic control in type 1 diabetics. However, allogeneic islets derived from cadaveric sources elicit immune responses that result in acute and chronic islet destruction. To prevent immune destruction of islets, transplant recipients require lifelong delivery of immunosuppressive drugs, which are associated with debilitating side effects. Biomaterial-based strategies to eliminate the need for immunosuppressive drugs are an emerging therapy for improving islet transplantation...
May 19, 2017: Advanced Drug Delivery Reviews
https://www.readbyqxmd.com/read/28532102/islet-encapsulated-implantable-composite-hollow-fiber-membrane-based-device-a-bioartificial-pancreas
#8
Rohit S Teotia, Sachin Kadam, Atul Kumar Singh, Surendra Kumar Verma, Ashutosh Bahulekar, Sujata Kanetkar, Jayesh Bellare
Islets from xeno-sources and islet like clusters derived from autologus stem cells have emerged as alternatives to cadaveric pancreas used for treatment of type 1 diabetes. However, the immuno-isolation of these islets from the host immune system suffers from the issue of biocompatibility and hypoxia. To overcome the issues of immunobarrier biocompatibility, we developed a Polysulfone (Psf)/TPGS composite hollow fiber membrane (HFM) using a hollow fiber spinning pilot plant specially developed for this purpose...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28532003/recent-development-in-cell-encapsulations-and-their-therapeutic-applications
#9
REVIEW
Jiang-Ze Wang, Zhen-Qi Ding, Feng Zhang, Wen-Bin Ye
Chronic and degenerative diseases are the main causes of death in the aging population worldwide. These diseases are currently maintained using long term administration of conventional drugs which are not curative and reduce the life quality of patients. It is urgent to develop new therapeutic approaches for the treatment of these diseases. Cell therapy that involves the injection of viable cell into patients is a promising therapeutic strategy in chronic and degenerative diseases. However, the survival of injected cells in host tissue is limited due to immunoresponse...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28530643/danger-signals-in-regulating-the-immune-response-to-solid-organ-transplantation
#10
Jamie L Todd, Scott M Palmer
Endogenous danger signals, or damage-associated molecular patterns (DAMPs), are generated in response to cell stress and activate innate immunity to provide a pivotal mechanism by which an organism can respond to damaged self. Accumulating experimental and clinical data have established the importance of DAMPs, which signal through innate pattern recognition receptors (PRRs) or DAMP-specific receptors, in regulating the alloresponse to solid organ transplantation (SOT). Moreover, DAMPs may incite distinct downstream cellular responses that could specifically contribute to the development of allograft fibrosis and chronic graft dysfunction...
May 22, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28529939/naturally-engineered-maturation-of-cardiomyocytes
#11
REVIEW
Gaetano J Scuderi, Jonathan Butcher
Ischemic heart disease remains one of the most prominent causes of mortalities worldwide with heart transplantation being the gold-standard treatment option. However, due to the major limitations associated with heart transplants, such as an inadequate supply and heart rejection, there remains a significant clinical need for a viable cardiac regenerative therapy to restore native myocardial function. Over the course of the previous several decades, researchers have made prominent advances in the field of cardiac regeneration with the creation of in vitro human pluripotent stem cell-derived cardiomyocyte tissue engineered constructs...
2017: Frontiers in Cell and Developmental Biology
https://www.readbyqxmd.com/read/28527202/diagnostic-accuracy-of-contrast-enhanced-ultrasound-ceus-in-monitoring-vascular-complications-in-patients-after-liver-transplantation-diagnostic-performance-compared-with-histopathological-results
#12
J Rübenthaler, K J Paprottka, E Hameister, K Hoffmann, N Joiko, M Reiser, D Rjosk-Dendorfer, D A Clevert
PURPOSE: To analyse the diagnostic performance of contrast-enhanced ultrasound (CEUS) in patients with vascular complications and transplant rejection compared to histopathological results. MATERIALS AND METHODS: Our study consisted of 45 retrospectively analysed patients that underwent liver transplantations between January 1993 and December 2015 and developed post-transplant vascular complications with transplant rejection. CEUS examinations took place between September 2006 and December 2015...
May 19, 2017: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/28527046/on-harm-thresholds-and-living-organ-donation-must-the-living-donor-benefit-on-balance-from-his-donation
#13
Nicola Jane Williams
For the majority of scholars concerned with the ethics of living organ donation, inflicting moderate harms on competent volunteers in order to save the lives or increase the life chances of others is held to be justifiable provided certain conditions are met. These conditions tend to include one, or more commonly, some combination of the following: (1) The living donor provides valid consent to donation. (2) Living donation produces an overall positive balance of harm-benefit for donors and recipients which cannot be obtained in a less harmful manner...
May 19, 2017: Medicine, Health Care, and Philosophy
https://www.readbyqxmd.com/read/28525959/challenges-and-opportunities-in-targeting-the-cd28-ctla-4-pathway-in-transplantation-and-autoimmunity
#14
Rebecca L Crepeau, Mandy L Ford
Introduction T cell activation is a complex process that requires multiple cell signaling pathways, including a primary recognition signal and additional costimulatory signals. One of the best-characterized costimulatory pathways includes the Ig superfamily members CD28 and CTLA-4 and their ligands CD80 and CD86. Areas Covered This review discusses past, current and future biological therapies that have been utilized to block the CD28/CTLA-4 cosignaling pathway in the settings of autoimmunity and transplantation, as well the challenges facing successful implementation of these therapies...
May 19, 2017: Expert Opinion on Biological Therapy
https://www.readbyqxmd.com/read/28524801/association-of-ugt2b7-ugt1a9-abcg2-and-il23r-polymorphisms-with-rejection-risk-in-kidney-transplant-patients
#15
Heloísa Lizotti Cilião, Rossana Batista Oliveira Camargo-Godoy, Marilesia Ferreira de Souza, Mariana Bisarro Dos Reis, Lorena Iastrenski, Vinicius Daher Alvares Delfino, Silvia Regina Rogatto, Ilce Mara de Syllos Cólus
Despite advances in testing compatibility between donor and recipient, graft rejection remains a current concern. Single-nucleotide polymorphisms (SNPs) that codify altered enzymes of metabolism, drug transport, and the immune system may contribute to graft rejection in transplant patients. This study examined the association between SNPs present in genes of these processes and occurrence of graft rejection episodes in 246 kidney transplant patients, 35% of which were diagnosed with rejection. Genotype-gene expression associations were also assessed...
May 19, 2017: Journal of Toxicology and Environmental Health. Part A
https://www.readbyqxmd.com/read/28518214/immune-monitoring-as-prerequisite-for-transplantation-tolerance-trials
#16
REVIEW
Katayoun Behnam Sani, Birgit Sawitzki
Ever since its first application in clinical medicine, scientists have urged to induce tolerance towards foreign allogeneic transplants and thus avoid rejection by the recipient's immune system. This would circumvent chronic use of immunosuppressive drugs (IS) and thus avoid development of IS-induced side effects, which are contributing to the still unsatisfactory long-term graft and patient survival after solid organ transplantation. Although manifold strategies of tolerance induction have been described in preclinical models, only three therapeutic approaches have been successfully utilized in a still small number of patients...
May 18, 2017: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/28516112/hemorrhagic-cystitis-in-a-liver-transplant-recipient-secondary-to-bk-virus
#17
Faisal Kamal, Bilal Ali, Matthew Barnes, Sehrish Kamal, Satheesh Nair, Humberto Gonzalez
The association between BK virus infection and hemorrhagic cystitis (HC) in hematopoietic stem cell transplant (HSCT) recipients is well established. However, BK virus-associated HC has not been described in liver transplant (LT) recipients. We present a case of BK virus-associated HC in a LT recipient. Our patient presented with worsening liver function tests 2 years after transplantation and was found to have acute cellular rejection. He was treated with increased immunosuppression and subsequently developed hematuria...
2017: ACG Case Reports Journal
https://www.readbyqxmd.com/read/28515595/percutaneous-transhepatic-techniques-for-management-of-biliary-anastomotic-strictures-in-living-donor-liver-transplant-recipients
#18
Chinmay B Kulkarni, Nirmal K Prabhu, Nazar P Kader, Ramiah Rajeshkannan, Sreekumar K Pullara, Srikanth Moorthy
AIM: To retrospectively analyze the percutaneous transhepatic techniques and their outcome in the management of biliary strictures in living donor liver transplant (LDLT) recipients. MATERIALS AND METHODS: We retrieved the hospital records of 400 LDLT recipients between 2007 and 2015 and identified 45 patients with biliary strictures. Among them, 17 patients (37.8%) (Male: female = 13:4; mean age, 36.1 ± 17.5 years) treated by various percutaneous transhepatic biliary techniques alone or in combination with endoscopic retrograde cholangiopancreatography (ERCP) were included in the study...
January 2017: Indian Journal of Radiology & Imaging
https://www.readbyqxmd.com/read/28512755/evaluation-of-safety-of-concomitant-splenectomy-in-living-donor-liver-transplantation
#19
Amr Badawy, Yuhei Hamaguchi, Satoru Seo, Tochimi Kaido, Hideaki Okajima, Shinji Uemoto
In Asian countries, concomitant splenectomy in living donor liver transplantation (LDLT) is indicated to modulate the portal vein pressure in the small sized graft to protect against small for size syndrome. While concomitant splenectomy in deceased donor liver transplantation is almost contraindicated based on western reports of increased mortality and morbidity rate due to septic complications, there are few studies about that in LDLT. So, we retrospectively investigated the clinical outcome of adult LDLT at Kyoto University Hospital from July 2010 to July 2016...
May 17, 2017: Transplant International: Official Journal of the European Society for Organ Transplantation
https://www.readbyqxmd.com/read/28512676/different-fermentation-processes-produced-variants-of-an-anti-cd52-monoclonal-antibody-that-have-divergent-in-vitro-and-in-vivo-characteristics
#20
Chao Zhuang, Chen Zheng, Yantian Chen, Zheng Huang, Yanchao Wang, Qiang Fu, Chen Zeng, Tong Wu, Liming Yang, Nianmin Qi
The anti-CD52 antibody has already been approved for the treatment of patients with resistant chronic lymphocytic leukemia, relapsing-remitting multiple sclerosis, and has demonstrable efficacy against stem cell transplantation rejection. A CHO cell line expressing a humanized anti-CD52 monoclonal antibody (mAb-TH) was cultivated in both fed-batch and perfusion modes, and then purified. The critical quality attributes of these mAb variants were characterized and the pharmacokinetics (PK) properties were investigated...
May 16, 2017: Applied Microbiology and Biotechnology
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