2015 American Transplant Congress
Costimulation Blockade Prevents Rejection of Vascularized Composite Allografts
[Background] Vascularized composite allotransplantation (VCA) is an emerging new era in transplant medicine and has become a valid therapeutic option after devastating tissue loss. The…2015 American Transplant Congress
Eomes-Expressing CD8+ T Cells and Th17 Cells Mediate Costimulatory Blockade-Resistant Allograft Rejection in Mice
The etiology of costimulatory blockade-resistant allograft rejection remains unclear. Therefore, the purpose of this study was to evaluate the responsiveness of distinct CD4+ and CD8+…2015 American Transplant Congress
Tissue Engineering Human Kidneys for Costimulation Blockade
1BREONICS, Inc., Watervliet, NY; 2Surgery, University of Utrecht, Utrecht, Netherlands.
Methods for preserving organs have employed hypothermic conditions. At these temperatures metabolism is 4% of normal. Tissue engineering of organs cannot be done without significant…2015 American Transplant Congress
Defining the Role of CD57+CD4 T Cells in Belatacept-Resistant Rejection
1Duke University, Durham, NC; 2Emory University, Atlanta, GA; 3Bristol-Myers Squibb, Princeton, NJ.
Purpose: We have shown that CD57+PD1- CD4 T cells are present in higher numbers in the peripheral blood and allograft biopsies of patients who experienced…2015 American Transplant Congress
Combined Anti-IL6R and CTLA4Ig Therapy Attenuates Recall Alloantibody Responses in a Mouse Model of HLA Sensitization
Comprehensive Transplant Center, Cedars-Sinai Medical Center, Los Angeles, CA.
[bald]Background[/bald] We previously reported that IL-6 inhibition by anti-IL6R antibody (mMR16-1) or CD28 pathway inhibition using CTLA4Ig (abatacept) reduced recall alloantibody responses in a mouse…2015 American Transplant Congress
A Novel, Blocking Anti-CD40 Monoclonal Antibody Prolongs Non-Human Primate Renal Allograft Survival in the Absence of B-Cell Depletion Or Thromboembolic Events
Background. CD40-CD154 pathway blockade prolongs renal allograft survival in non-human primates (NHPs). However, antibodies targeting CD154 were associated with an increased incidence of thromboembolic complications…2015 American Transplant Congress
In Vitro Evidence That CTLA4Ig Attenuates Recall Alloantibody Responses
Background: CTLA4Ig is an agonist that blocks CD28-B7 costimulation, downregulating T cell immunity, but also appears to negate T cell-dependent B cell activation, thus inhibiting…2015 American Transplant Congress
Anti-BTLA Antibody (6B2) Induced Prolongation of Fully MHC-Mismatched Murine Cardiac Allograft and Generation of Foxp3+ Regulatory T Cells
Background: The co-inhibitory receptor B and T lymphocyte attenuator (BTLA; CD272) has been implicated in the regulation of autoimmune and may potentially play an important…2015 American Transplant Congress
Desensitization With Costimulation Blockade and Proteasome Inhibition in a Non-Human Primate Model of Kidney Transplantation
[Background] Sensitization is a growing problem on the kidney waiting list. Alloantibody can significantly deteriorate graft survival. Currently used desensitization strategies are time-consuming, expensive and…2015 American Transplant Congress
Blocking CD4 T Cell Helper Functions Improves Efficacy of ATG Treatment in Sensitized Transplant Recipients
Immunology, Cleveland Clinic, Cleveland, OH.
Antibody mediated lymphocyte depletion is used in clinical transplantation to improve graft function. While the presence of donor-reactive memory T cells is the primary rationale…