2022 American Transplant Congress
ABO Hemagglutination Titres Do Not Accurately Reflect ABO Antibody Levels
*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
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
*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
*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…2022 American Transplant Congress
Stem Cell Donor-Derived CPRA Better Reflects Sensitization Than Current CPRA
*Purpose: The OPTN Histocompatibility Committee proposes replacing the current calculated panel reactive antibody (CPRA), based on HLA haplotype frequencies from ~14,000 deceased kidney donors, with…2021 American Transplant Congress
Blood Type A2/a2b to B Renal Transplantation: A Single Center Retrospective Cohort Study
NYU Langone Transplant Institute, NYU Langone Health, New York, NY
*Purpose: Blood type B candidates on the deceased donor kidney waitlist have a lower transplantation rate and longer wait time than candidates of other blood…2021 American Transplant Congress
Use of a Novel Bead-based Assay to Measure the Impact of Imlifidase on ABO IgG Antibodies
*Purpose: The accurate assessment and measurement of ABO antibodies (ABO-Ab) is a critical component of ABO-incompatible (ABOi) transplantation. ABO-Ab comprise both IgG and IgM, which…2021 American Transplant Congress
Are All DSA’s the Same? Are We Ready for Precision Medicine in Pediatric LT?
*Purpose: Donor-specific antibodies (DSA) play an uncertain role in rejection after liver transplantation (LT). We hypothesized that evaluation of epitope differences in HLA-DR/DQ mismatching can…2021 American Transplant Congress
Disparities in HLA Representation by Single Antigen Reagents in Different Ethnic Populations
1Keck School of Medicine of USC, Los Angeles, CA, 2Children's Hospital Los Angeles, Los Angeles, CA
*Purpose: It is not possible to test for antibodies against the antigens encoded by every HLA allele due to cost and throughput constraints. When alleles…2021 American Transplant Congress
HLA Mismatching and Subclinical Inflammation: An Association to be Considered in Kidney Transplant Patients with Low Immunological Risk
*Purpose: Subclinical inflammation (SCI) (
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