Articles tagged "Gene expression"

2019 American Transplant Congress
The Molecular Features of Chronic Lung Allograft Dysfunction (CLAD) in Transbronchial and Endobronchial Mucosa Biopsies
M. D. Parkes¹, K. M. Halloran¹, J. Chang², P. F. Halloran and the INTERLUNG study group¹
¹University of Alberta, Edmonton, AB, Canada, ²ATAGC, University of Alberta, Edmonton, AB, Canada
*Purpose: Chronic lung allograft dysfunction (CLAD), the major long-term problem in lung transplantation, requires new strategies for prevention and management. However, CLAD is infrequently diagnosed…
2019 American Transplant Congress
Using Ensembles of Machine Learning Classifiers to Maximize the Accuracy and Stability of Molecular Biopsy Interpretation
J. Reeve¹, K. S. Madill-Thomsen², P. F. Halloran and the INTERCOMEX Study Group³
¹University of Alberta, Edmonton, AB, Canada, ²Alberta Transplant Applied Genomics Centre, University of Alberta, Edmonton AB, AB, Canada, ³University of Alberta, Edmonton AB, AB, Canada
*Purpose: The Molecular Microscope diagnostic system (MMDx), based on microarray gene expression, uses ensembles of machine learning classifiers rather than single genes, gene sets, or…
2019 American Transplant Congress
Single Cell RNA-seq Analysis of Antibody-Mediated Rejection Reveals Endothelial – Pericyte NOTCH Signaling
A. F. Malone, A. Chadha, H. Wu, S. Ramakrishnan, E. Donnelly, B. D. Humphreys
Washington University School of Medicine, Saint Louis, MO
*Purpose: To precisely define endothelial cell responses in AMR we performed comprehensive single cell RNA-seq on a human kidney biopsy with AMR.*Methods: Single cell libraries…
2019 American Transplant Congress
Role of Mitochondria, Metabolism and Inflammation: Pathways Influencing Short Term Outcomes Post-Renal Transplantation
S. Bontha¹, A. Bajwa¹, G. Lorenzo², J. Eason³, D. Maluf⁴, V. Mas⁵
¹Surgery, UTHSC, Memphis, TN, ²Northwestern University, Chicago, IL, ³Director of Transplant Institute UTHSC, Memphis, TN, ⁴UTHSC, Memphis, TN, ⁵Director of Transplant Research Institute, Memphis, TN
*Purpose: Preconditioning of donor kidneys and clinical assessment for need of dialysis early post-transplant vary per each case and are crucial for improving transplant outcomes.…
2019 American Transplant Congress
Discovery and Validation of Blood Genomic Signatures of Acute Rejection in Liver Transplant Recipients
J. Levitsky¹, N. Bridges², J. Odim², M. Brown², D. Ikle³, B. Armstrong³, A. Demetris⁴, S. Asrani⁵, G. Klintmalm⁵, T. Schiano⁶, A. Moss⁷, K. Chavin⁸, C. Miller⁹, M. Kandpal¹⁰, L. Zhao¹⁰, S. Kurian¹¹, M. Abecassis¹⁰
¹Div of Gastroenterology & Comprehensive Tx Cnt, Chicago, IL, ²NIAID, Bethesda, MD, ³Rho, Chapel Hill, NC, ⁴UPMC, Pittsburgh, PA, ⁵Baylor, Dallas, TX, ⁶Mount Sinai, New York, NY, ⁷Mayo Arizona, Phoenix, AZ, ⁸Case Western, Cleveland, OH, ⁹Cleveland Clinic, Cleveland, OH, ¹⁰Comprehensive Transplant Center, Chicago, IL, ¹¹Scripps, San Diego, CA
*Purpose: Biomarker profiles diagnostic of acute rejection (AR) could enhance the management of liver transplant (LT) recipients. Our aim was to discover and validate blood…
2019 American Transplant Congress
Comparing Antibody-Mediated Rejection with or without Detectable DSA: Similar Pathology and Similar Poor Prognosis
G. Einecke¹, J. Reeve², P. F. Halloran³
¹Dpt. of Nephrology, Hannover Medical School, Hannover, Germany, ²Dpt. of Laboratory Medicine and Pathology and Alberta Transplant Applied Genomics Centre, University of Alberta, Edmonton, AB, Canada, ³Dpt. of Nephrology and Alberta Transplant Applied Genomics Centre, University of Alberta, Edmonton, AB, Canada
*Purpose: Banff guidelines require the detection of donor-specific antibodies (DSA) in addition to microvascular inflammation (MVI) for a diagnosis of antibody-mediated rejection (ABMR), but MVI…
2019 American Transplant Congress
Timing and Donor-Specific Antibodies, but Not C4d Deposition, Determine Leukocyte Infiltration in Renal Allograft Biopsies with the Histological Picture of Antibody-Mediated Rejection
J. Callemeyn¹, A. Senev¹, E. Lerut², M. Coemans¹, D. Kuypers¹, W. Gwinner³, M. Essig⁴, D. Anglicheau⁵, P. Marquet⁶, M. Naesens¹
¹Department of Microbiology and Immunology, KU Leuven, Leuven, Belgium, ²Department of Pathology, University Hospitals Leuven, Leuven, Belgium, ³Department of Nephrology, Hannover Medical School, Hannover, Germany, ⁴Department of Nephrology, Dialysis and Transplantation, University of Limoges, Limoges, France, ⁵Necker-Enfants Malades Institute, French National Institute of Health and Medical Research U1151, Paris, France, ⁶U850 INSERM, University of Limoges, Limoges, France
*Purpose: Diagnosis of antibody-mediated rejection following kidney transplantation can be challenging, given the limited specificity of individual histological parameters and time-dependent occurrence of histological confounders.…
2019 American Transplant Congress
A Robust and Portable Protocol for RNA Isolation from Urinary Cells for Noninvasive Monitoring of Kidney Allograft Recipients
B. Botticelli, S. Albakry, E. Edusei, H. Yang, M. Cassidy, C. Li, C. Snopkowski, M. Lubetzky, J. Lee, D. Dadhania, T. Muthukumar, M. Suthanthiran
Weill Cornell, New York, NY
*Purpose: Urinary cell mRNA abundance, assessed by RT-qPCR assay, is a robust monitoring tool. In the CTOT-04 study, urine processed by 5 transplant sites were…
2019 American Transplant Congress
Gene Expression Profiles in CD8+ T Cells in Chronic Antibody-Mediated Rejection (CAMR) of Kidney Transplantation
P. Pontrelli¹, F. Rascio², M. Accetturo¹, G. Castellano¹, S. Simone¹, G. Stallone², L. Gesualdo¹, G. Grandaliano²
¹Department of Emergency, and Organ Transplantation, Nephrology, Dialysis and Transplantation Unit, University of Bari, Bari, Italy, ²Dept. of Surgical and Medical Sciences, Nephrology Unit, University of Foggia, Foggia, Italy
*Purpose: CAMR is the main cause of chronic graft injury and subsequent graft loss. Most of the studies on the subject focused their attention to…
2019 American Transplant Congress
microRNA-375 Provides an Objective Measure of Pancreas Quality in Organ Donors
I. Shapey¹, A. Summers¹, J. O'Sullivan¹, P. Yiannoullou¹, J. Casey², S. Forbes², M. Rosenthal³, P. Johnson⁴, P. Choudhary¹, J. Bushnell⁵, J. Shaw⁶, N. Hanley¹, T. Augustine¹, M. Rutter¹, D. van Dellen¹
¹University of Manchester, Manchester, United Kingdom, ²University of Edinburgh, Edinburgh, United Kingdom, ³Royal Free Hospital, London, United Kingdom, ⁴University of Oxford, Oxford, United Kingdom, ⁵Southmead Hospital, Bristol, United Kingdom, ⁶University of Newcastle, Newcastle, United Kingdom
*Purpose: Donor pancreatic beta cells are at high risk from apoptosis. Objective methods for assessing the quality of donor pancreases for transplantation are limited. We…