Articles tagged "Histocompatibility"

2022 American Transplant Congress
A Novel Application of SRTR Data to Interrogate the Effects of HLA-DQ Mismatches in Kidney Transplantation
D. Isaacson¹, M. W. Gmeiner², V. Kosmoliaptsis³, H. C. Copley³, J. D. Schold⁴, A. R. Tambur¹
¹Northwestern University, Chicago, IL, ²London School of Economics, London, United Kingdom, ³Cambridge University, Cambridge, United Kingdom, ⁴Cleveland Clinic, Cleveland, OH
*Purpose: Single-center studies demonstrate de-novo HLA-DQ donor-specific antibodies (DSA) are the most common and pathogenic DSA. However, HLA-DQ is not accounted for in many kidney…
2022 American Transplant Congress
Which is More Important for Predicting De Novo DSA Production, B Cell Epitope (EPLET) or T Cell Epitope (PIRCHE) Analysis ?
T. Kobayashi¹, T. Tomosugi², S. Sakamoto², S. Ashimine¹, K. Iwasaki¹, M. Niemann³, E. Spierings⁴, Y. Miwa¹, M. Okumura¹, K. Ishiyama¹, A. Takeda², N. Goto², S. Narumi², Y. Watarai²
¹Aichi Medical University School of Medicine, Nagakute, Japan, ²Nagoya Daini Red Cross Hospital, Nagoya, Japan, ³PIRCHE AG, Berlin, Germany, ⁴UMC Utrecht, Utrecht, Netherlands
*Purpose: De novo donor-specific antibodies (dnDSA) can cause chronic ABMR, resulting in poor prognosis. Recently, mismatch at B cell epitope level, i.e. EPLET mismatch, has…
2022 American Transplant Congress
Long-Term Outcomes of Crossmatch Positive Simultaneous Liver Kidney Transplants in the United States
S. Riad¹, E. Aby¹, S. Jackson², P. Nguyen³, N. Lim¹, J. Lake¹
¹Medicine, University of Minnesota, Minneapolis, MN, ²Mhealth-Fairview, Minneapolis, MN, ³Surgery, University of Minnesota, Minneapolis, MN
*Purpose: The long-term results of crossmatch positive (XM+) simultaneous liver-kidney (SLK) transplants are conflicting. We examined the association between crossmatch (XM) status and SLK outcomes…
2022 American Transplant Congress
Simultaneous Liver/ Kidney Transplant Reduces Both Donor Specific and Non-Donor Specific HLA Antibodies
X. Zhang, S. Wisel, I. Kim, S. Jordan
Cedars Sinai Medical Center, Los Angeles, CA
*Purpose: Kidney allografts can be transplanted across strong donor specific antibody (DSA) barriers in simultaneous liver/kidney transplant (SLK) recipients. It is suggested that preformed DSAs…
2022 American Transplant Congress
Complete and High-Resolution HLA Typing Improves the Accuracy of Post-Transplant Assessment of De Novo Anti-Donor Immune-Mediated Events
M. Meneghini¹, A. Perona², E. Crespo³, F. J. Bemelman⁴, P. M. Reinke⁵, O. Viklicky⁶, M. Giral⁷, O. Bestard¹
¹Vall d'Hebron University Hospital, Barcelona, Spain, ²Universitat de Barcelona, Barcelona, Spain, ³Nephrology and Transplantation Laboratory, Vall d’Hebron Institut de Recerca (VHIR), Barcelona, Spain, ⁴Amsterdam University Medical Centers, Amsterdam, Netherlands, ⁵Charité Universitätsmedizin, Berlin, Germany, ⁶Institute for Clinical and Experimental Medicine (IKEM), Prague, Czech Republic, ⁷Nantes Université, Inserm, CHU Nantes, Nantes, France
*Purpose: High-resolution (HR) HLA typing using NGS technology has shown to improve the accuracy of assessing donor-recipient compatibility and characterization of pre-transplant anti HLA antibodies…
2022 American Transplant Congress
High Resolution Typing Can Improve Accuracy and Sensitivity of the Virtual Crossmatch for Sensitized Patients – A Single Center’s Experience
C. MarElia-Bennett¹, V. Rohan², K. Twombley³, O. Moussa¹
¹Pathology & Laboratory Medicine, Medical University of South Carolina, Charleston, SC, ²Surgery, Medical University of South Carolina, Charleston, SC, ³Medical University of South Carolina, Charleston, SC
*Purpose: The introduction of solid phase assays has significantly enhanced our ability to execute virtual crossmatches (VXMs). However, this method is not without its shortcomings.…
2022 American Transplant Congress
ABO Hemagglutination Titres Do Not Accurately Reflect ABO Antibody Levels
A. Halpin¹, T. Ellis², J. Pearcey², B. Motyka², T. L. Lowary³, C. Cairo⁴, S. Maier², L. J. West⁵
¹Pediatrics/Dept of Laboratory Medicine, University of Alberta/Alberta Precision Laboratories, Edmonton, AB, Canada, ²Pediatrics, University of Alberta, Edmonton, AB, Canada, ³Academia Sinica, Institute of Biological Chemistry, Taipei, Taiwan, ⁴Chemistry, University of Alberta, Edmonton, AB, Canada, ⁵Pediatrics, University of Alberta, Canadian Donation and Transplant Research Program, Edmonton, AB, Canada
*Purpose: ABO antibody (ABO-Ab) quantification is essential for risk assessment for ABO-incompatible (ABOi) transplantation, but the hemagglutination assay (HA) for ABO-Ab titres is known to…
2022 American Transplant Congress
Beyond CPRA: Identifying Sensitized Kidney Candidates with Markedly Low Access to Transplant
K. Bradbrook¹, A. Maldonado², K. Sjöholm², C. Kjellman², J. Lee³, D. Stewart¹
¹UNOS, Richmond, VA, ²Hansa Biopharma AB, Lund, Sweden, ³Immucor, Norcross, GA
*Purpose: The Kidney Allocation System (KAS) improved the rates of transplantation in highly sensitized (HS) patients. However, a subset of HS patients remain at a…
2022 American Transplant Congress
Production of Exosomal IL35 from Alloreactive Treg Cells: A Basis for Potent Immunotherapy and Tolerance in Human Kidney Transplantation
W. J. Burlingham¹, E. Jankowska-Gan², J. Fechner¹, C. Little¹, S. Tripathi³, B. Schreiber³, A. Chandraker³, D. Foley⁴
¹Surgery-Transplant Division, University of Wisconsin, Madison, WI, ²Surgery-Transplant Division, University of Wisconsin-Madison, Madison, WI, ³Surgery-Transplant Division, Brigham & Women's Hospital, Boston, MA, ⁴University of Wisconsin, Madison, WI
*Purpose: Treg cells make a variety of immunosuppressive products—cytokines such as IL10, TGFβ, and IL35, and enzymes such as the CD39/CD73 pair that convert extracellular…
2022 American Transplant Congress
HLA-Specific IgD/CD27 Double Negative B Cell Frequency Assessed by a Novel Multiplex Bead-Based Assay Predicts Rejection in Kidney Transplant Recipients
Z. Ilyas¹, A. Akl², D. Pinelli¹, L. Gallon³, A. Tambur¹, M. Ansari⁴
¹Northwestern University, Chicago, IL, ²Dr. Soliman Fakeeh Hospital, Jeddah, Saudi Arabia, ³Northwestern Univ NMFF, Chicago, IL, ⁴Medicine, Northwestern University, Chicago, IL
*Purpose: Recipients with sensitization to HLA defined by a high percentage of Panel Reactive Antibodies (PRA) or Donor-specific anti-HLA antibodies (DSA) are at higher immunologic…

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