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Acute cellular rejection

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https://www.readbyqxmd.com/read/28210263/a-paradigm-shift-on-the-question-of-b-cells-in-transplantation-recent-insights-on-regulating-the-alloresponse
#1
REVIEW
Daniel J Firl, Gilles Benichou, James I Kim, Heidi Yeh
B lymphocytes contribute to acute and chronic allograft rejection through their production of donor-specific antibodies (DSAs). In addition, B cells present allopeptides bound to self-MHC class II molecules and provide costimulation signals to T cells, which are essential to their activation and differentiation into memory T cells. On the other hand, both in laboratory rodents and patients, the concept of effector T cell regulation by B cells is gaining traction in the field of transplantation. Specifically, clinical trials using anti-CD20 monoclonal antibodies to deplete B cells and reverse DSA had a deleterious effect on rates of acute cellular rejection; a peculiar finding that calls into question a central paradigm in transplantation...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28191475/the-potential-of-micrornas-as-novel-biomarkers-for-transplant-rejection
#2
REVIEW
Matthias Hamdorf, Satoru Kawakita, Matthew Everly
The control of gene expression by microRNAs (miRNAs, miR) influences many cellular functions, including cellular differentiation, cell proliferation, cell development, and functional regulation of the immune system. Recently, miRNAs have been detected in serum, plasma, and urine and circulating miR profiles have been associated with a variety of diseases. Rejection is one of the major causes of allograft failure and preventing and treating acute rejection are the central task for clinicians working with transplant patients...
2017: Journal of Immunology Research
https://www.readbyqxmd.com/read/28161809/alteration-of-cardiac-deformation-in-acute-rejection-in-pediatric-heart-transplant-recipients
#3
Nitin Chanana, Charlotte S Van Dorn, Melanie D Everitt, Hsin Yi Weng, Dylan V Miller, Shaji C Menon
The objective of this study is to assess changes in cardiac deformation during acute cellular- and antibody-mediated rejection in pediatric HT recipients. Pediatric HT recipients aged ≤18 years with at least one episode of biopsy-diagnosed rejection from 2006 to 2013 were included. Left ventricular systolic S (SS) and SR (SSr) data were acquired using 2D speckle tracking on echocardiograms obtained within 12 h of right ventricular endomyocardial biopsy. A mixed effect model was used to compare cardiac deformation during CR (Grade ≥ 1R), AMR (pAMR ≥ 2), and mixed rejection (CR and AMR positive) versus no rejection (Grade 0R and pAMR 0 or 1)...
February 4, 2017: Pediatric Cardiology
https://www.readbyqxmd.com/read/28135788/corticosteroid-wean-after-heart-transplantation-is-there-a-risk-for-antibody-formation
#4
Omeed Elboudwarej, Derek Phan, Jignesh Patel, Frank Liou, Tamar Aintablian, Ashley Osborne, Zhe Yu, Nancy Reinsmoen, Jon Kobashigawa
BACKGROUND: Corticosteroid withdrawal after heart transplantation is limited to select immune-privileged patients but it is not known if this predisposes patients to a higher risk for sensitization. METHODS: 178 heart transplant recipients had panel reactive antibody (PRA) measurements at transplant and every 6 months and were monitored for rejection with protocol endomyocardial biopsies. Corticosteroid withdrawal was initiated at 6 months post-transplant in select patients...
January 30, 2017: Clinical Transplantation
https://www.readbyqxmd.com/read/28131664/survival-and-outcomes-after-lung-transplantation-for-non-scleroderma-connective-tissue-related-interstitial-lung-disease
#5
Andrew M Courtwright, Souheil El-Chemaly, Paul F Dellaripa, Hilary J Goldberg
BACKGROUND: Patients with non-scleroderma connective tissue-related lung disease (NS-CTLD), including rheumatoid arthritis, idiopathic inflammatory myopathies, Sjögren syndrome, mixed connective tissue disease, and systemic lupus erythematosus, may be at risk for worse outcomes after lung transplantation because of immune dysregulation or extrapulmonary manifestations of their underlying disease. We compared survival, acute and chronic rejection, and extrapulmonary organ dysfunction after transplantation in patients with NS-CTLD and idiopathic pulmonary fibrosis (IPF)...
December 31, 2016: Journal of Heart and Lung Transplantation
https://www.readbyqxmd.com/read/28125729/association-of-serum-mir-142-3p-and-mir-101-3p-levels-with-acute-cellular-rejection-after-heart-transplantation
#6
Ihdina Sukma Dewi, Zsuzsanna Hollander, Karen K Lam, Janet-Wilson McManus, Scott J Tebbutt, Raymond T Ng, Paul A Keown, Robert W McMaster, Bruce M McManus, Olof Gidlöf, Jenny Öhman
BACKGROUND: Identifying non-invasive and reliable blood-derived biomarkers for early detection of acute cellular rejection in heart transplant recipients is of great importance in clinical practice. MicroRNAs are small molecules found to be stable in serum and their expression patterns reflect both physiological and underlying pathological conditions in human. METHODS: We compared a group of heart transplant recipients with histologically-verified acute cellular rejection (ACR, n = 26) with a control group of heart transplant recipients without allograft rejection (NR, n = 37) by assessing the levels of a select set of microRNAs in serum specimens...
2017: PloS One
https://www.readbyqxmd.com/read/28118023/il-17a-blockade-attenuates-obliterative-bronchiolitis-and-ifn%C3%AE-cellular-immune-response-in-lung-allografts
#7
Pawan Kumar Gupta, Sarah R Wagner, Qiang Wu, Rebecca A Shilling
Obliterative bronchiolitis (OB), characterized by fibrous obliteration of the small airways, is a major impediment to long-term survival in lung transplant recipients. We have previously found that IL-17A is primarily produced by CD4+ T cells and γδ T cells after lung transplant in a mouse model of orthotopic lung transplant. Absence of either subset of T cells was compensated for by expansion of the other subset, which suggested systemic blockade of IL-17A was necessary. To determine the specific role of IL-17A in the development of OB, we treated lung allograft recipients with an IL-17A antagonistic antibody...
January 24, 2017: American Journal of Respiratory Cell and Molecular Biology
https://www.readbyqxmd.com/read/28105760/aerosol-based-airway-epithelial-cell-delivery-improves-airway-regeneration-and-repair
#8
E Kardia, E S Ch'ng, B H Yahaya
Aerosol-based cell therapy has emerged as a novel and promising therapeutic strategy for treating lung diseases. The goal of this study was to determine the safety and efficacy of aerosol-based airway epithelial cell (AEC) delivery in the setting of acute lung injury induced by tracheal brushing in rabbit. 24 hours following injury, exogenous rabbit AECs were labelled with BrdU and aerosolized using the MicroSprayer® Aerosolizer into the injured airway. Histopathological assessments of the injury in the trachea and lungs were quantitatively scored (1 and 5 d after cell delivery)...
January 20, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/28104146/successful-rescue-of-late-onset-antibody-mediated-rejection-12-years-after-living-donor-intestinal-transplantation-a-case-report
#9
G S Wu, Q C Zhao, Z S Li, Y Wu, W Z Wang, M B Li, H Shi, M Wang, D L Chen, J Y Zheng, X Wang, D M Fan
BACKGROUND: Antibody-mediated rejection (ABMR) has recently surfaced as a potential form of graft dysfunction after intestinal transplantation. METHODS: We present a case of an intestinal transplant recipient who developed late-onset ABMR 12 years after living-donor transplantation. An 18-year-old male recipient with a history of extensive intestinal resection secondary to acute bowel volvulus exhibited an excellent baseline immune profile for transplantation, including ABO-identical and HLA-haploidentical to the donor; a negative cross-match with a panel reactive antibody of 3...
January 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/28104135/renal-allograft-aspergillus-infection-presenting-with-obstructive-uropathy-a-case-report
#10
L Sadagah, M Alharbi, M Alshomrani, A Almalki
BACKGROUND: Isolated renal allograft aspergillosis is rare and usually presents with fever and decreased glomerular filtration rate. Presentation with obstructive uropathy caused by aspergillus fungal balls is much less common. We report a young male patient who presented with obstructive uropathy secondary to isolated renal allograft aspergillus infection 6 weeks after transplant. He was treated with nephrectomy and antifungal medications. CASE PRESENTATION: A 29-year-old Saudi male patient had a recent living non-related kidney transplantation in Pakistan...
January 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/28104119/association-of-the-number-of-hla-dr-mismatches-with-early-post-transplant-acute-cellular-rejection-among-heart-transplantation-recipients-a-cohort-study-in-japanese-population
#11
D Nitta, K Kinugawa, T Imamura, J Iino, M Endo, E Amiya, M Hatano, O Kinoshita, K Nawata, M Ono, I Komuro
BACKGROUND: Although many risk factors are reported about graft rejection after heart transplantation (HTx), the effect of HLA mismatch (MM) still remains unknown, especially in the Japanese population. The aim of the present study was to investigate the influence of HLA MM on graft rejection among HTx recipients in Japan. METHODS: We retrospectively investigated the association of the number of HLA MM including class I (A, B) and class II (DR) (for each locus MM: 0 to 2, total MM: 0 to 6) and the incidence of moderate to severe acute cellular rejection (ACR) confirmed by endomyocardial biopsy (International Society for Heart and Lung Transplantation grade ≥ 3A/2R) within 1 year after HTx...
January 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/28089194/left-ventricular-global-longitudinal-strain-predicts-major-adverse-cardiac-events-and-all-cause-mortality-in-heart-transplant-patients
#12
Tor Skibsted Clemmensen, Hans Eiskjær, Brian Bridal Løgstrup, Lars Bo Ilkjær, Steen Hvitfeldt Poulsen
BACKGROUND: Left ventricular global longitudinal strain (LVGLS) is a robust longitudinal myocardial deformation marker that is strongly affected by cardiac allograft vasculopathy (CAV), microvascular dysfunction, and acute cellular rejection (ACR). We evaluated graft deformation for risk stratification in long-term heart transplant (HTx) patients. METHODS: The study included 196 patients who underwent HTx between 2011 and 2013. Patients underwent comprehensive echocardiography and coronary angiography...
December 15, 2016: Journal of Heart and Lung Transplantation
https://www.readbyqxmd.com/read/28073833/exosomal-mir-142-3p-is-increased-during-cardiac-allograft-rejection-and-augments-vascular-permeability-through-down-regulation-of-endothelial-rab11fip2-expression
#13
Ihdina Sukma Dewi, Selvi Celik, Anna Karlsson, Zsuzsanna Hollander, Karen Lam, Janet-Wilson McManus, Scott Tebbutt, Raymond Ng, Paul Keown, Robert McMaster, Bruce McManus, Jenny Öhman, Olof Gidlöf
AIMS: Exosome-mediated microRNA transfer is a recently discovered mode of cell-to-cell communication, in which microRNAs act as paracrine molecules, exerting their regulatory effects in recipient cells. T cells and endothelial cells are two main players in the mechanism of acute cellular cardiac rejection. The aim of this study was to investigate the role of exosomal microRNAs in the crosstalk between T cells and endothelial cells and its implications for the molecular mechanisms that drive acute cellular rejection in heart transplantation...
January 10, 2017: Cardiovascular Research
https://www.readbyqxmd.com/read/28070117/re-transplantation-higher-creatinine-levels-in-hepatitis-c-virus-patients-and-donor-age-are-predictors-of-mortality-in-long-term-analysis-of-late-acute-rejection-in-liver-transplantation
#14
Lucas Souto Nacif, Rafael Soares Pinheiro, Rafael Antônio de Arruda Pécora, Ryan Yukimatsu Tanigawa, Vinicius Rocha-Santos, Wellington Andraus, Venancio Avancini Ferreira Alves, Luiz Carneiro D'Albuquerque
BACKGROUND Late acute rejection (LAR) differs in its clinical and histological presentation and management from early acute rejection. This clinical entity is not completely understood; thus, we aimed to identify significant prognostic factors that can influence post-transplant survival in LAR patients. The purpose of this study was to evaluate the incidence and post-transplant survival of patients from a single center with a focus on late acute rejection. MATERIAL AND METHODS From January 2002 to June 2013, all liver biopsies from patients with rejection were scored using the Banff criteria...
January 10, 2017: Annals of Transplantation: Quarterly of the Polish Transplantation Society
https://www.readbyqxmd.com/read/28059835/donor-liver-small-droplet-macrovesicular-steatosis-is-associated-with-increased-risk-for-recipient-allograft-rejection
#15
Won-Tak Choi, Kuang-Yu Jen, Dongliang Wang, Mehdi Tavakol, John P Roberts, Ryan M Gill
Although donor livers with <30% large droplet macrovesicular steatosis (MaS) and/or small droplet MaS (irrespective of percentage) are considered safe to use, this consensus is based on variable definitions of MaS subtypes and/or without a reproducible scoring system. We analyzed 134 donor liver biopsies from allografts transplanted at University of California at San Francisco between 2000 and 2015 to determine whether large and/or small droplet MaS is a risk factor for poor outcomes. Large droplet MaS was defined as a fat droplet occupying greater than one half of an individual hepatocyte, with nuclear displacement, and scored as the percentage of total parenchymal area replaced by large fat droplets on ×40 magnification...
March 2017: American Journal of Surgical Pathology
https://www.readbyqxmd.com/read/28058227/magnetic-resonance-imaging-of-the-transplanted-pediatric-heart-as-a-potential-predictor-of-rejection
#16
Steven C Greenway, Frederic Dallaire, Paul F Kantor, Anne I Dipchand, Rajiv R Chaturvedi, Monali Warade, Eugenie Riesenkampff, Shi-Joon Yoo, Lars Grosse-Wortmann
AIM: To evaluate cardiac magnetic resonance imaging (CMR) as a non-invasive tool to detect acute cellular rejection (ACR) in children after heart transplant (HT). METHODS: Thirty pediatric HT recipients underwent CMR at the time of surveillance endomyocardial biopsy (EMB) and results were compared to 14 non-transplant controls. Biventricular volumes, ejection fractions (EFs), T2-weighted signal intensities, native T1 times, extracellular volumes (ECVs) and presence of late gadolinium enhancement (LGE) were compared between patients and controls and between patients with International Society of Heart and Lung Transplantation (ISHLT) grade ≥ 2R rejection and those with grade 0/1R...
December 24, 2016: World Journal of Transplantation
https://www.readbyqxmd.com/read/28035084/sphingosine-1-phosphate-receptor-modulators-and-drug-discovery
#17
REVIEW
Soo-Jin Park, Dong-Soon Im
Initial discovery on sphingosine 1-phosphate (S1P) as an intracellular second messenger was faced unexpectedly with roles of S1P as a first messenger, which subsequently resulted in cloning of its G protein-coupled receptors, S1P₁₋₅. The molecular identification of S1P receptors opened up a new avenue for pathophysiological research on this lipid mediator. Cellular and molecular in vitro studies and in vivo studies on gene deficient mice have elucidated cellular signaling pathways and the pathophysiological meanings of S1P receptors...
January 1, 2017: Biomolecules & Therapeutics
https://www.readbyqxmd.com/read/28008661/rescue-alemtuzumab-for-refractory-acute-cellular-rejection-and-bronchiolitis-obliterans-syndrome-after-lung-transplantation
#18
Christopher R Ensor, Lindsey C Rihtarchik, Matthew R Morrell, J W Awori Hayanga, Alicia B Lichvar, Joseph M Pilewski, Stephen Wisniewski, Bruce A Johnson, Jonathan D'Cunha, Adriana Zeevi, John F McDyer
Refractory acute-cellular rejection (rACR) is associated with death and bronchiolitis obliterans syndrome (BOS) post-lung transplantation. We report the largest cohort of lung transplant recipients (LTR) treated with rescue alemtuzumab for rACR or BOS. RACR outcomes included burden of ACR 30-days before and 180-days after rescue assessed by a novel composite rejection standardized score (CRSS, range 0-6); freedom from ≥A2 ACR. BOS outcomes included freedom from BOS progression and FEV1 decline >10%. Univariate parametric and nonparametric statistical approaches were used to assess treatment response...
December 23, 2016: Clinical Transplantation
https://www.readbyqxmd.com/read/27990483/identification-of-novel-and-noninvasive-biomarkers-of-acute-cellular-rejection-after-liver-transplantation-by-protein-microarray
#19
Keita Okubo, Hiroshi Wada, Atsushi Tanaka, Hidetoshi Eguchi, Masahide Hamaguchi, Akira Tomokuni, Yoshito Tomimaru, Tadafumi Asaoka, Naoki Hama, Koichi Kawamoto, Shogo Kobayashi, Shigeru Marubashi, Hiroaki Nagano, Noriko Sakaguchi, Hiroyoshi Nishikawa, Yuichiro Doki, Masaki Mori, Shimon Sakaguchi
BACKGROUND: Acute cellular rejection (ACR) is one of the main factors in transplanted organ failure in liver transplantation. A precise marker for diagnosing or predicting rejection is not currently available; therefore, invasive liver biopsy is standard procedure. To develop a noninvasive method for precise diagnosis of ACR, we evaluated autoantibodies from patient sera as potential biomarkers using protein microarrays (seromics). METHODS: Sera from hepatitis C virus-positive ACR patients were compared to three hepatitis C virus cirrhosis control groups and healthy volunteers...
December 2016: Transplantation Direct
https://www.readbyqxmd.com/read/27990480/efficacy-of-acute-cellular-rejection-treatment-according-to-banff-score-in-kidney-transplant-recipients-a-systematic-review
#20
REVIEW
Caroline Lamarche, Jean-Maxime Côté, Lynne Sénécal, Héloïse Cardinal
BACKGROUND: The poor prognosis classically associated with Banff grade 2 acute cell-mediated rejection (CMR) may be due to unrecognized antibody-mediated damage. We thus performed a systematic review of the literature to determine the rate of response to treatment in kidney transplant recipients with pure CMR, stratified by Banff class. METHODS: In addition to a manual search, databases interrogated included Excerpta Medica Database (EMBASE), Medical Literature Analysis and Retrieval System Online (MEDLINE), Evidence-Based Medicine (EBM) databases, Central, PubMed and CINAHL...
December 2016: Transplantation Direct
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