2022 American Transplant Congress
Humoral and Cellular Immunity 6 Months After SARS-CoV-2 Infection in Solid-Organ Transplant Recipients
*Purpose: The purpose of this study was to evaluate long term humoral and cellular immunity generated following SARS-CoV-2 infection in solid organ transplant recipients (SOTR).*Methods:…2022 American Transplant Congress
Polarized Il-6 Secretion from Lymphatic Endothelial Cells Promotes Treg Conversion to Extregs
1University of Maryland School of Medicine, Baltimore, MD, 2University of Minnesota, Minneapolis, MN
*Purpose: Regulatory T cell (Treg) suppressor function and allograft protection depend on maintenance of transcription factor Foxp3 expression and lymphatic migration. Lymphatic endothelial cell (LEC)…2022 American Transplant Congress
Natural vs Induced ABO Antibodies in a Murine Model: Role of Sex and T Cells
1University of Alberta, Edmonton, AB, Canada, 2University of Melbourne, Melbourne, Australia
*Purpose: Interaction of ‘natural’ ABO antibodies (nAbs) with their cognate AB(H)-antigens (Ags) poses a high risk of rapid rejection of ABO-incompatible (ABOi) organ transplants. We…2022 American Transplant Congress
A FRET-Based Technique to Quantify Foxp3 Acetylation in TREG
*Purpose: Foxp3 acetylation is essential to TREG stability and function. Acetylation protects Foxp3 from degradation, and acetylated Foxp3 translocates to the nucleus to activate the…2022 American Transplant Congress
Pretransplant Recipient TNFR2+T Regulatory Cell Frequency Predicts Long-Term Outcomes After Kidney Transplantation
McGill University Health Centre, Montreal, QC, Canada
*Purpose: Pre-transplant indices capable of predicting long-term renal allograft function could improve graft allocation strategies. We previously associated pretransplant frequency of Tumor Necrosis Factor Receptor…2022 American Transplant Congress
Re-Infection with SARS-CoV-2 in Solid-Organ Transplant Recipients: Incidence Density and Convalescent Immunity Prior to Re-Infection
*Purpose: The purpose of this study was to study our cohort of adult solid organ transplant recipients who had been infected with SARS-CoV-2 to describe…2022 American Transplant Congress
Cd137 on Host Dendritic Cells Fine-Tunes the Intesity of Donor T Cells in Systemic Alloinmmune Responses
*Purpose: CD137 is a potent costimulatory receptor for CD8+ T cells but it also regulates dendritic cells (DCs) to suppress immune responses. In this study,…2022 American Transplant Congress
Trajectory Analysis Of Single Cell RNAseq Data Suggest Intrarenal Induction Of Tregs In Spontaneously Accepted Kidney Allografts
*Purpose: Kidney allografts transplanted across certain mouse strain combinations (e.g. DBA/2 to B6) are spontaneously accepted independent of the recipient’s thymus, spleen, and lymph nodes.…2022 American Transplant Congress
Pro- and Anti-Tolerogenic Microbiota Induce Distinct Gut Microbiome Metabolic Pathways and Loco-Regional Immune Responses
1University of Maryland School of Medicine, Baltimore, MD, 2University of Maryland, Baltimore, MD
*Purpose: Colitis-associated Desulfovibrio desulfuricans (Desulfo) induces pro-inflammatory cytokine responses in dendritic cell and macrophage cell lines as well as primary cells. In contrast, Bifidobacterium pseudolongum…2022 American Transplant Congress
Longitudinal Single-Cell Profiling of CD8 T Cells During CMV Viremia in Kidney Transplant Recipients
University of California, Los Angeles, Los Angeles, CA
*Purpose: Cytomegalovirus (CMV) remains an important threat to immunocompromised transplant recipients, leading to graft injury and mortality. CMV elicits sustained T cell responses with accumulation…
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