Articles tagged "Gene expression"

2019 American Transplant Congress
A Regulatory T Cell-Intrinsic Role for Ikaros in Acquired Transplant Tolerance
R. M. Thomas, L. Wang, W. W. Hancock, A. D. Wells
The Children's Hospital of Philadelphia, Philadelphia, PA
*Purpose: Ikaros is a transcriptional repressor encoded by the Ikzf1 gene that was recently identified as the pharmacologic target of thalidomide analogs in successful therapy…
2019 American Transplant Congress
A Metagene Signature of Lymphocytic Bronchitis Following Lung Transplantation
J. R. Greenland¹, P. Wang², J. J. Brotman², R. Ahuja¹, T. A. Chong², M. Kleinhenz², L. E. Leard², J. A. Golden², S. R. Hays², J. P. Singer², J. Kukreja³, N. Y. Greenland⁴, Z. Lasik⁴, P. Blanc¹
¹Medicine, VA Health Care System, San Francisco, CA, ²Medicine, University of California, San Francisco, CA, ³Surgery, University of California, San Francisco, CA, ⁴Pathology, University of California, San Francisco, CA
*Purpose: Lymphocytic bronchitis (LB) precedes chronic lung allograft dysfunction (CLAD). Peri-vascular (A-grade) and peri-bronchiolar (B-grade) lymphocytic inflammation are traditional markers of acute cellular rejection. The…
2019 American Transplant Congress
Transcriptome Profiling Of Renal Transplant Biopsies With Acute Cellular Rejection From Patients On Calcineurin Inhibitor-based Or Cni-avoidance Immunosuppression
D. Dobi¹, F. Vincenti², Z. G. Laszik¹
¹Department of Pathology, University of California, San Francisco, San Francisco, CA, ²Departments of Medicine and Surgery, University of California, San Francisco, San Francisco, CA
*Purpose: Despite their suboptimal toxicity profile, calcineurin-inhibitors (CNIs) remain the cornerstone of renal transplant immunosuppression. Previous efforts to completely eliminate CNIs failed, because CNI-avoidance protocols…
2019 American Transplant Congress
The Negative Costimulatory Pd-1/pd-l1 Pathway Is Upregulated In Early Cell-mediated Rejection
T. Kurashige, R. Khedraki, K. Keslar, N. Dvorina, W. Baldwin
Cleveland Clinic Main Campus, Lerner Research Institute, Cleveland, OH
*Purpose: Extensive transcript analysis has been performed on grafts at the time of rejection, but gene expression preceding overt rejection is less well studied.*Methods: We…
2019 American Transplant Congress
Organ-Specific Injury and Recovery Mechanisms in Post-Transplant Ischemia Reperfusion Injury
S. Bontha¹, A. Bajwa¹, L. Gallon², J. Eason³, D. Maluf¹, V. Mas⁴
¹UTHSC, Memphis, TN, ²Northwestern University, Chicago, IL, ³Director of Transplant Institute UTHSC, Memphis, TN, ⁴Director of Transplant Research Institute, Memphis, TN
*Purpose: Ischemia reperfusion (I/R) injury is a major contributor to short-term graft function. Dissecting organ specific and common molecular pathways associated with I/R injury among…
2019 American Transplant Congress
Characterizing the Dominant Phenotype in Kidney Transplant Biopsies: Improving the Prediction of Risk by a Global View of Rejection, Injury, and Atrophy-Fibrosis
P. F. Halloran and The INTERCOMEX Investigators¹, J. Reeve²
¹University of Alberta, Edmonton, AB, Canada, ²Alberta Transplant Applied Genomics Centre, Edmonton, AB, Canada
*Purpose: Interpreting kidney transplant biopsies by histology or molecules involves assigning scores for separate pathologic categories: rejection, acute injury (molecules only), and chronic parenchymal loss…
2019 American Transplant Congress
The Polish Troubled Kidney Transplant Biopsy Study: External Validation of the Molecular Microscope System
M. Myślak¹, D. Deborska-Materkowska², M. Ciszek², J. Mazurkiewicz¹, A. Debska-Slizien³, P. F. Halloran⁴, A. Perkowska-Ptasińska⁵
¹Pomeranian Medical University, Szczecin, Poland, ²Warsaw Medical Univeristy, Warsaw, Poland, ³Gdansk Medical University, Gdansk, Poland, ⁴Alberta Transplant Applied Genomics Centre, University of Alberta, Edmonton AB, AB, Canada, ⁵Medical University of Warsaw, Warsaw, Poland
*Purpose: The transplant clinician frequently encounters kidney transplant biopsies that are difficult to interpret by histology. A Molecular Microscope Diagnostic System (MMDx) has been developed…
2019 American Transplant Congress
Dissecting The Role Of Donor Acute Kidney Injury On Molecular Responses Post-transplantation
S. Bontha¹, D. Maluf¹, E. Akalin², L. Gallon³, J. Eason⁴, V. Mas⁵
¹UTHSC, Memphis, TN, ²Albert Einstein Medical College, Bronx, NY, ³Northwestern University, Chicago, IL, ⁴Director of Transplantation, Memphis, TN, ⁵Director of Transplant Research, Memphis, TN
*Purpose: In the current scenario of shortage of donor organs, kidneys with AKI are being used and outcome research reports show that the outcomes could…
2019 American Transplant Congress
Correlation between Gene Expression and Cardiac Function in Ex Vivo Perfused Porcine Hearts
S. Rotich, N. Herbers, S. Hatami, J. Nagendran, M. Mengel, D. Freed, B. Adam
University of Alberta, Edmonton, AB, Canada
*Purpose: Cardiac transplantation is a life-saving intervention for advanced heart failure but it is limited by a shortage of suitable donor organs. Ex vivo heart…
2019 American Transplant Congress
The Changing Face of T Cell-Mediated Rejection
A. Perkowska-Ptasinska and INTERCOMEX investigators¹, P. F. Halloran²
¹Medical University of Warsaw, Warsaw, Poland, ²Alberta Transplant Applied Genomics Centre, Edmonton, AB, Canada
*Purpose: We studied how the problem of TCMR in indication biopsies was changing with time by exploring features of 138 biopsies with molecular TCMR in…