2021 American Transplant Congress
Distinct Phenotype and Function of Antibody-suppressor Cxcr5+Cd8+ T Cells
*Purpose: We have reported that the novel subset of antibody-suppressor CD8+ T cells (termed CD8+ TAb-supp cells) require the expression of CXCR5. In addition, alloprimed…2021 American Transplant Congress
Single Cell Rna-Sequencing of Urinary Cells and Defining the Immune Landscape of Rejection in Human Kidney Allografts
*Purpose: Transcriptome-based clustering of urinary cells in kidney transplant recipients may help identify cell-type specific injury and develop cell-type specific biomarkers for the noninvasive assessment…2021 American Transplant Congress
Proteomic Analysis of Extracellular Vesicles Derived From a Potent Donor-specific Regulatory T Cell-enriched Population Demonstrates Multiple Markers of Immune Suppression
*Purpose: Extracellular vesicles (EVs) are emerging as vital mediators of intercellular communication and immune regulation. Regulatory T cells (Tregs) play an integral role in immune…2021 American Transplant Congress
Gm2a: A Novel Regulatory Pathway Controlling Alloimmunity
1Department of Surgery, Emory University, Atlanta, GA, 2Mount Sinai School of Medicine, New York, NY
*Purpose: In recently published studies we discovered that the inhibitory receptor FcγRIIB regulates CD8+ T cell alloimmunity in a cell-autonomous fashion, and that increased expression…2021 American Transplant Congress
Estrogen Receptors Alpha and Beta are Required for Immune Homeostasis and Normal Treg Function
*Purpose: Estrogen signaling is a critical component of mammalian homeostasis, acting through a complex and interconnected system of hormone synthesis pathways and receptor signaling cascades.…2021 American Transplant Congress
T-cell-Mediated Immunity to Sars-cov-2 Defines Covid-19 Risk and Severity in Transplanted and Non-Transplanted Individuals and Associates with Myeloid-Derived Suppressor Cells
*Purpose: We assessed whether COVID-19-risk is enhanced by chronic immunosuppression, and is associated with suppressor cells.*Methods: We tested 66 COVID-19 patients, including 26 with solid…2021 American Transplant Congress
AT-1501, a Novel and Clinically Applicable CD40L Specific Monoclonal Antibody, Promotes Islet Allograft Survival in Nonhuman Primates
*Purpose: Immune intervention with a CD40L specific monoclonal antibody (mAb, Hu5c8, Biogen) has previously been shown to safely and effectively prevent islet allograft (IA) rejection…2021 American Transplant Congress
Tissue-Specific Features of Immunity Revealed by Single-cell RNA Sequencing of Healthy Human Kidney
*Purpose: Tissue-resident immune cells reside within distinct niches across organs, where they sustain tissue homeostasis and rapidly respond to perturbations in the local microenvironment. Across…2021 American Transplant Congress
Treg Engagement of Lymphotoxin Beta Receptor in Lymphatic Endothelial Cells is Required for Allograft Protection
1U Maryland, Baltimore, MD, 2Harvard U, Boston, MA
*Purpose: Sequential migration of regulatory T cells (Treg) from graft to afferent lymphatics and lymph nodes (LN) is needed for Treg suppressive function. Migration requires…2021 American Transplant Congress
Epigenetic & Functional Changes Associated with Alloreactive Memory CD8 T Cell Subsets in Liver Transplant Patients
1University of Pittsburgh Medical Center, Pittsburgh, PA, 2UPMC, Pittsburgh, PA
*Purpose: Donor-specific allo-reactive memory CD8 T cells play a pivotal role in allo-immunity and represent a major hurdle against tolerance induction in solid organ transplantation.…
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