Articles tagged "T cells"

2021 American Transplant Congress
Expansion of Cd45ra-foxp3hi Activated Regulatory T Cells Predict Immune Tolerance in Patients with Combined Kidney and Bone Marrow Transplantation
Y. Kwon¹, K. Lee², J. Park²
¹Transplantation Research Center, Samsung Medical Center, Seoul, Korea, Republic of, ²Department of Surgery, Samsung Medical Center, Seoul, Korea, Republic of
*Purpose: Simultaneous transplantation of a solid organ and bone marrow from an identical donor is a possible means of achieving transplant tolerance. Here, we attempted…
2021 American Transplant Congress
PD-1/PD-L1 Selectively Regulates Treg Lymphatic Migration
W. Piao¹, L. Li¹, C. Paluskievicz¹, Y. Zhang², V. Saxena³, K. Hippen², B. Blazar², L. Riella⁴, J. Bromberg¹
¹Surgery, U Maryland, Baltimore, MD, ²U Minnesota, Minneapolis, MN, ³U Maryland, Baltimore, MD, ⁴Harvard U, Boston, MA
*Purpose: The molecules that regulate Treg migration are incompletely identified. Programmed death-1 (PD-1) and its ligand PD-L1 are immune checkpoint proteins which regulate immune cell…
2021 American Transplant Congress
Effects of IL-18 on Key Post-Translational Modifications of Human Foxp3 and Innate Immunity
T. Akimova¹, L. M. Christensen¹, Z. Wang², M. H. Levine², W. W. Hancock¹
¹CHOP & University of Pennsylvania, Philadelphia, PA, ²University of Pennsylvania, Philadelphia, PA
*Purpose: Most of our ideas about Treg cells are extrapolated from findings in mice, with actual clinical data typically involving flow cytometric enumeration of CD4+FOXP3+…
2021 American Transplant Congress
Changes in Cytomegalovirus Specific T Cell Immunity With Immunomodulation in Serodiscordant High Risk Transplant Recipients
T. Tinkham, C. Song, R. Winstead, I. Yakubu, A. Brown, S. Sterling, G. Gupta, D. Kumar
Virginia Commonwealth University Health, Richmond, VA
*Purpose: Cytomegalovirus (CMV) infections cause significant morbidity and mortality among all solid organ transplant recipients. CMV discordant (D+/R-) recipients are at higher risk of developing…
2021 American Transplant Congress
LTβR Engagement Regulates Treg Migration, Stability and Suppressor Function
V. Saxena¹, W. Piao¹, L. Li¹, Y. Xiong¹, M. W. Shirkey¹, J. Iyyathurai¹, R. Lakhan¹, R. Abdi², J. Bromberg¹
¹U Maryland, Baltimore, MD, ²Harvard U, Boston, MA
*Purpose: Regulatory T cell (Treg) lymphatic migration and maintenance of transcription factor Foxp3 expression are required for suppressor function and allograft protection. Treg stimulate lymphotoxin…
2021 American Transplant Congress
The Absence of T Follicular Regulatory Cells Prolongs Germinal Center Reactivity in Transplantation
E. S. Crichton, S. Zeng, I. Badell
Emory University, Atlanta, GA
*Purpose: Deleterious alloantibodies result from T follicular helper (Tfh) cell-driven germinal center (GC) reactivity. T follicular regulatory (Tfr) cells are a subset of regulatory T…
2021 American Transplant Congress
Impact of Belatacept and Tacrolimus on Cmv Viral Load Control and Relapse in Moderate and High-risk Cmv Serostatus Kidney Transplant Recipients
W. Magua¹, A. C. Johnson¹, G. M. Karadkhele¹, I. R. Badell¹, P. Vasanth¹, M. G. Lyon III², A. K. Mehta², K. A. Easley³, J. Rickert⁴, C. P. Larsen¹
¹Department of Surgery, Emory University, Atlanta, GA, ²Department of Medicine, Emory University, Atlanta, GA, ³Biostatistics and Bioinformatics, Emory University, Atlanta, GA, ⁴RStudio and R Consortium, San Jose, CA
*Purpose: We aim to evaluate the impact of belatacept and tacrolimus on CMV viral load control, remission and relapse in CMV high-risk (serostatus, D+/R-) and…
2020 American Transplant Congress
Noninvasive Imaging of CD122+ T Cells via Immuno-PET for Detection of Acute Cellular Rejection
A. J. Matar¹, B. P. Lovasik¹, D. Vanover², L. Rotolo², Y. Dong¹, D. A. Faber¹, D. V. Mathews¹, W. H. Kitchens¹, P. Santangelo², A. B. Adams¹
¹Surgery and Transplantation, Emory University, Atlanta, GA, ²Biomedical Engineering, Georgia Tech, Atlanta, GA
*Purpose: Acute cellular rejection (ACR) remains a clinically important problem following organ transplantation. Clinically, suspicion of ACR is dependent upon serum laboratory values, and diagnosis…
2020 American Transplant Congress
Recipient Expression of C-Type Lectin Receptor Mincle Promotes Rapid T Cell Homeostatic Recovery Following Antibody Mediated Lymphoablation
S. Hasgur, R. Fan, A. Valujskikh
Inflammation and Immunity, Cleveland Clinic, Cleveland, OH
*Purpose: Antibody-mediated lymphocyte depletion is widely used in transplantation. We recently established that T cell recovery in mouse heart allograft recipients treated with anti-thymocyte globulin…
2020 American Transplant Congress
Influence of Microbial Communities on Transplantation
K. Janek¹, J. Fechner¹, K. Krautkramer², S. Sudakaran³, J. Denu⁴, J. Handelsman³, F. Rey⁵, E. Vivas⁵, J. Mezrich¹
¹Surgery, University of Wisconsin School of Medicine and Public Health, Madison, WI, ²University of Wisconsin School of Medicine and Public Health, Madison, WI, ³Wisconsin Institute for Discovery, Madison, WI, ⁴Biomolecular Chemistry, University of Wisconsin-Madison, Madison, WI, ⁵Bacteriology, University of Wisconsin-Madison, Madison, WI
*Purpose: A diverse microbiome is important in the generation, maintenance, and function of the immune system. Specific bacterial communities may have a relationship with organ…