2022 American Transplant Congress
Discrepancy Rates Between Histology (HIST) and Molecular Diagnosis (MDX) of T-cell Mediated Rejection (TCMR) Depend on Choice of Bioinformatics Pipeline
University of Pittsburgh Medical Center, Pittsburgh, PA
*Purpose: HIST based treatment of TCMR has played a key role in the reduction of its incidence to historic lows of ~10%. MDX methods developed…2022 American Transplant Congress
Anti-CD80/86 Antibody (RM80/GL-1) Suppressed Murine Donor Specific Antibody Through Anergy CD4+T Cells
*Purpose: The interactions between CD80 and CD86 on antigen-presenting cells and CD28 on T cells may play an important role in alloimmune responses. We investigated…2022 American Transplant Congress
Regulatory T Cells Suppress Memory IFN-Gamma Production in Highly Sensitised Patients
*Purpose: Highly sensitized patients (HS) present worse long-term outcome after transplantation compared to those without donor-specific antibodies (DSA). It has been suggested that desensitisation using…2022 American Transplant Congress
Analysis of Sars-Cov-2-Specific T-Cell Responses Using Novel Single-Cell Multiplexed Isolight in Covid-19 Convalescents
1Northwestern University, Chicago, IL, 2IsoPlexis, Branford, CT
*Purpose: COVID-19 has poor outcomes in transplant recipients with reduced antibody responses. However, the exact cellular immune response against SARS-CoV-2 remains largely unclear. We developed…2022 American Transplant Congress
Focal Distribution of TCMR Causes False Negative Results in Spatially Resolved Molecular Diagnostic Assays
University of Pittsburgh, Pittsburgh, PA
*Purpose: Molecular assays on ~3mm biopsy (BX) fragments of cannot confirm histologic T-cell mediated rejection (TCMR) in ~50% of routine biopsies, and fail to detect…2022 American Transplant Congress
Abnormal Kidney T Cell Metabolism During Ischemia Reperfusion Injury Can Be Modified to Improve Organ Structure and Function
Johns Hopkins University School of Medicine, Baltimore, MD
*Purpose: T cells play an important role in the pathophysiology of kidney ischemia reperfusion injury (IRI). Metabolic programming of T cells, a rapidly evolving field,…2022 American Transplant Congress
Infiltrating CD8+ Cytotoxic T Cells Are Converted to a Regulatory Phenotype in Accepted Kidney Allografts
*Purpose: Mouse kidney allografts are spontaneously accepted in select, fully-mismatched donor-recipient strain combinations (i.e. DBA/2J to C57BL/6 (B6)) without any immunosuppressive drug treatment. We have…2022 American Transplant Congress
Regulatory T and B Cell Responses Are Equally Compromised During Antibody-Mediated Rejection of Kidney Allografts
*Purpose: Although considerable advances have been made in understanding the cellular effector mechanisms responsible for donor-specific antibody (DSA) generation leading to antibody-mediated rejection (ABMR), the…2022 American Transplant Congress
Faster B Cell Rebound is Observed Following Xenotransplantation Compared to Allotransplantation in a Highly Sensitized Nonhuman Primate Kidney Transplantation Model
Surgery, Duke Transplant Center, Durham, NC
*Purpose: Xenotransplantation outcomes have been greatly improved due to the advent of genetically engineered pigs and agents targeting the CD40-CD40L signaling pathway. However, studies have…2022 American Transplant Congress
Single Cell RNA Sequencing Identifies Primarily Terminal Effector and Exhausted CD8+T Cells in Chronically Rejected Human Kidney Allografts
*Purpose: Chronic renal allograft rejection often leads to irreversible damage, despite intensification of immunosuppression (ISN). T cell phenotypes in this clinical setting are not well…
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