Articles tagged "Adhesion molecules"

2018 American Transplant Congress
Involvement of PD-L1 Upregulation in Anti-A/B Antibody-Induced Graft Accommodation: Reduction of CD4 T Cell Allo-Response against Graft HLA Class II DR
K. Iwasaki,¹ Y. Miwa,¹ H. Hamana,³ H. Kishi,³ A. Muraguchi,³ K. Uchida,¹ T. Kobayashi.²
¹Kidney Disease and Transplant Immunology, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan; ²Renal Transplant Surgery, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan; ³Immunology, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama, Japan.
[Background] Antibodies against transplanted organs cause complement-independent graft injury, but there remain many unknown aspects of its mechanism, in particular its effect on allo-response to…
2018 American Transplant Congress
Treg Regulate Distinct Lymphatic NFκB Signaling Pathways to Alter Migration and Immunity
W. Piao, Y. Xiong, L. Li, V. Saxena, J. Bromberg.
UMB, MD.
Background: Treg migration to the graft and draining lymph nodes is crucial for graft survival. Little is known about the molecular cues that regulate the…
2018 American Transplant Congress
Increased Expression of CEACAM1 is Cytoprotective during Ischemia-Reperfusion Injury in Human Orthotopic Liver Transplantation
R. Sosa,¹ J. Nevarez-Mejia,¹ M. Rossetti,¹ A. Zarrinpar,² F. Kaldas,² C. Lassman,¹ B. Naini,¹ N. Datta,² R. Busuttil,² D. Gjertson,¹ J. Kupiec-Weglinski,² E. Reed.¹
¹Pathology and Laboratory Medicine, University of California, Los Angeles, Los Angeles, CA; ²Surgery, University of California, Los Angeles, Los Angeles, CA.
Background T cell exhaustion has recently been proposed as an alternative mechanism to prevent memory development and tissue damage arising during ischemia-reperfusion injury (IRI) in…
2017 American Transplant Congress
Uptake of Extracellular Mitochondria Activates Human Endothelial Cells That Stimulate Alloreactive Effector T Cell Responses.
T. Brennan,¹ F. Feng,¹ L. Lin,¹ M. Song,¹ Q.-J. Li,² A. Kirk,^1,2 H. Xu.¹
¹Surgery, Duke University, Durham, NC; ²Immunology, Duke University, Durham, NC
Introduction: Vascular endothelial cells (VECs), the initial barrier between host immunity and donor allograft tissue, play a critical role in allograft rejection. We investigated the…
2017 American Transplant Congress
The Treg/Th17 Axis: A Dynamic Balance Regulated by Stromal Laminins.
T. Simon, J. Bromberg.
University of Maryland, Baltimore
Background: Our recent work demonstrated that laminins α4β1γ1 and α5β1γ1, components of the lymph node (LN) stroma, are differentially regulated. Tolerance is associated with relatively…
2017 American Transplant Congress
Binding of Human Neutrophils to Activated Porcine Endothelium Is Mediated by E-Selectin.
C. Laird,¹ B. French,¹ L. Burdorf,¹ X. Cheng,¹ W. Fogler,² J. Magnani,² C. Phelps,³ D. Ayares,³ A. Azimzadeh,¹ R. Pierson.¹
¹University of Maryland SOM, Baltimore; ²GlycoMimetics, Inc, Rockville; ³Revivicor, Inc, Blacksburg
Purpose: Shortage of transplantable human organs motivates research into alternatives, including xenotransplantation. When porcine lungs are perfused with human blood, a majority of human neutrophils…
2016 American Transplant Congress
A Unique In Vitro Migration Model for Leukocyte Trans-Lymphatic Endothelial Migration.
Y. Xiong,¹ C. Brinkman,¹ K. Hippen,² B. Blazar,² J. Bromberg.¹
¹University of Maryland, Baltimore; ²University of Minnesota, Minneapolis.
Trans-endothelial migration (TEM) is an essential process for leukocyte circulation. While much is known about lymphocyte blood to tissue migration, far less is known about…
2016 American Transplant Congress
Belatacept Immunotherapy Is Not Augmented by Blockade of Activated LFA-1 in a Nonhuman Primate Renal Transplant Model.
K. Samy,¹ M. Mulvihill,¹ B. Collins,¹ D. Lo,² M. Song,¹ F. Leopardi,¹ A. Kirk.^1,2
¹Department of Surgery, Duke University Medical Center, Durham, NC; ²Emory University, Atlanta, GA.
Purpose: Belatacept specifically targets de novo alloimmune responses without off target side effects. However, resistant alloreactive memory T cells have complicated its use. LFA-1 therapy…
2016 American Transplant Congress
Acute Rejection in Non-Human Primates Treated with Belatacept Is Mediated by a Unique CD8 Memory Subset.
D. Mathews,¹ W. Wakwe,¹ M. Lowe,¹ C. Breeden,¹ F. Leopardi,¹ A. Farris,¹ M. Song,¹ E. Strobert,² J. Jenkins,² C. Larsen,¹ R. Townsend,³ A. Adams.¹
¹Emory Transplant Center, Emory University, Atlanta, GA; ²Yerkes National Primate Research Center, Atlanta, GA; ³Bristol Myers-Squibb Pharmaceutical Research Institute, Princeton, NJ.
Belatacept is a high affinity version of the fusion protein CTLA4-Ig that blocks CD28 mediated T cell costimulation, providing a more targeted/less toxic form of…
2015 American Transplant Congress
VLA-4 Blockade Inhibits Endogenous Memory CD8 T Cell-Mediated Rejection of Cardiac Allografts
S. Iida,¹ C. Su,¹ T. Abe,¹ K. Tanabe,² R. Fairchild.¹
¹Immunology, Cleveland Clinic, Cleveland, OH; ²Urology, Tokyo Women's Medical University, Tokyo, Japan.
Endogenous memory CD8 T cells infiltrate cardiac allografts within 24 hours of reperfusion and are activated to proliferate and produce IFN-γ in response to donor…