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rejection transplantation

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https://www.readbyqxmd.com/read/28532102/islet-encapsulated-implantable-composite-hollow-fiber-membrane-based-device-a-bioartificial-pancreas
#1
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
#2
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
#3
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
#4
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
#5
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
#6
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
#7
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
#8
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
#9
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
#10
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
#11
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
#12
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
#13
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
https://www.readbyqxmd.com/read/28512328/tacrolimus-blood-level-fluctuation-predisposes-to-coexisting-bk-virus-nephropathy-and-acute-allograft-rejection
#14
Chia-Lin Shen, An-Hang Yang, Tse-Jen Lien, Der-Cherng Tarng, Chih-Yu Yang
BK virus nephropathy (BKVN) and allograft rejection are two distinct disease entities which occur at opposite ends of the immune spectrum. However, they coexist in renal transplant recipients. Predisposing factors for this coexistence remain elusive. We identified nine biopsy-proven BKVN patients with coexisting acute rejection, and 21 patients with BKVN alone. We retrospectively analyzed the dosage and blood concentrations of immunosuppressants during the 3-month period prior to the renal biopsy between the two patient groups...
May 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28511172/donor-specific-anti-human-leukocyte-antigens-antibodies-acute-rejection-renal-function-and-histology-in-kidney-transplant-recipients-receiving-tacrolimus-and-everolimus
#15
Alexandra Ferreira, Claudia Felipe, Marina Cristelli, Laila Viana, Geovana Basso, Suelen Stopa, Juliana Mansur, Mayara Ivani, Adrieli Bessa, Priscila Ruppel, Wilson Aguiar, Erika Campos, Maria Gerbase-DeLima, Henrique Proença, Helio Tedesco-Silva, José Medina-Pestana
BACKGROUND: This analysis compared efficacy, renal function, and histology in kidney transplant recipients receiving tacrolimus (TAC) combined with everolimus (EVR) or mycophenolate (MPS). METHODS: This was a retrospective analysis from a randomized trial in kidney transplant recipients who received a single 3 mg/kg dose of rabbit antithymocyte globulin (r-ATG), TAC, EVR, and prednisone (PRED; r-ATG/EVR, n = 85), basiliximab (BAS), TAC, EVR, and PRED (BAS/EVR, n = 102) or BAS, TAC, MPS, and PRED (BAS/MPS, n = 101)...
May 17, 2017: American Journal of Nephrology
https://www.readbyqxmd.com/read/28510740/propofol-based-anaesthesia-versus-sevoflurane-based-anaesthesia-for-living-donor-kidney-transplantation-results-of-the-vapor-1-randomized-controlled-trial
#16
G J Nieuwenhuijs-Moeke, V B Nieuwenhuijs, M A J Seelen, S P Berger, M C van den Heuvel, J G M Burgerhof, P J Ottens, R J Ploeg, H G D Leuvenink, M M R F Struys
Background: Kidney transplantation is associated with harmful processes affecting the viability of the graft. One of these processes is associated with the phenomenon of ischaemia-reperfusion injury. Anaesthetic conditioning is a widely described strategy to attenuate ischaemia-reperfusion injury. We therefore conducted the Volatile Anaesthetic Protection of Renal Transplants-1 trial, a pilot project evaluating the influence of two anaesthetic regimens, propofol- vs sevoflurane-based anaesthesia, on biochemical and clinical outcomes in living donor kidney transplantation...
May 1, 2017: British Journal of Anaesthesia
https://www.readbyqxmd.com/read/28510335/proteoforms-in-peripheral-blood-mononuclear-cells-as-novel-rejection-biomarkers-in-liver-transplant-recipients
#17
T K Toby, M Abecassis, K Kim, P M Thomas, R T Fellers, R D LeDuc, N L Kelleher, J Demetris, J Levitsky
Biomarker profiles of acute rejection in liver transplant recipients could enhance the diagnosis and management of recipients. Our aim was to identify diagnostic proteoform signatures of acute rejection in circulating immune cells, using an emergent "top down" proteomics methodology. We prepared differentially processed and cryopreserved cell lysates from 26 non-viral liver transplant recipients by molecular weight-based fractionation and analyzed them by mass spectrometry of whole proteins in three steps: 1) Nanocapillary liquid chromatography coupled with high-resolution tandem mass spectrometry; 2) database searching to identify and characterize intact proteoforms; 3) data processing through a hierarchical linear model matching the study design to quantify proteoform fold changes in patients with rejection vs...
May 16, 2017: American Journal of Transplantation
https://www.readbyqxmd.com/read/28510327/pre-existing-diabetes-is-a-risk-factor-for-increased-rates-of-cellular-rejection-after-kidney-transplantation-an-observational-cohort-study
#18
S Johal, F Jackson-Spence, H Gillott, S Tahir, J Mytton, F Evison, B Stephenson, J Nath, A Sharif
AIM: To investigate whether people with diabetes have an elevated risk of kidney allograft rejection in a well characterized clinical cohort in the setting of contemporary immunosuppression. METHODS: We conducted a retrospective cohort study including all kidney allograft recipients at a single centre between 2007 and 2015, linking clinical, biochemical and histopathological data from electronic patient records. RESULTS: Data were analysed for 1140 kidney transplant recipients...
May 16, 2017: Diabetic Medicine: a Journal of the British Diabetic Association
https://www.readbyqxmd.com/read/28510265/severity-and-outcome-of-the-norovirus-infection-in-children-after-intestinal-transplantation
#19
Marie Patte, Danielle Canioni, Véronique Avettand Fenoel, Pierre Frange, Marion Rabant, Cécile Talbotec, Florence Lacaille
In immunocompromised patients, the NoV infection is prolonged and severe. We retrospectively studied the severity of the NoV infection in children after an ITx, the treatment, and the long-term evolution. Norovirus PCR in stools was positive for 19 children in 21 separate episodes. The infection was symptomatic in 18 cases. At diagnosis, the median weight loss was 5% (0-11) and the creatinine clearance was 75 mL/min/1.73 m(2) (19-142). On 14 digestive biopsies, the pathological findings were non-specific with a constant mononuclear infiltration, showing signs of rejection in one case...
May 16, 2017: Pediatric Transplantation
https://www.readbyqxmd.com/read/28509699/penis-transplantation-first-us-experience
#20
Curtis L Cetrulo, Kai Li, Harry M Salinas, Matthew D Treiser, Ilse Schol, Glen W Barrisford, Francis J McGovern, Adam S Feldman, Michael T Grant, Cigdem Tanrikut, Jeffrey H Lee, Richard J Ehrlichman, Paul W Holzer, Garry M Choy, Raymond W Liu, Zhi Yang Ng, Alexandre G Lellouch, Josef M Kurtz, William G Austen, Jonathan M Winograd, Branko Bojovic, Kyle R Eberlin, Ivy A Rosales, Robert B Colvin, Dicken S C Ko
OBJECTIVE: We describe the first successful penis transplant in the United States in a patient with a history of subtotal penectomy for penile cancer. BACKGROUND: Penis transplantation represents a new paradigm in restoring anatomic appearance, urine conduit, and sexual function after genitourinary tissue loss. To date, only 2 penis transplants have been performed worldwide. METHODS: After institutional review board approval, extensive medical, surgical, and radiological evaluations of the patient were performed...
May 15, 2017: Annals of Surgery
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