2017 American Transplant Congress
A Regulatory T Cell (Treg)-Intrinsic Role for p27kip1 in Acquired Transplant Tolerance.
Pathology, The Children's Hospital of Philadelphia, Philadelphia, PA
We previously found that the cyclin-dependent kinase CDK2 phosphorylates the Treg transcription factor Foxp3, targeting it for proteolytic degradation. Treg with defective CDK2 activity express…2017 American Transplant Congress
A New and Potent Distal Enhancer of the IL2 Gene.
Interleukin-2 is a potent T cell growth factor with crucial roles in both immunity and tolerance. Genetic studies in humans and mice demonstrate a role…2017 American Transplant Congress
Anti-CD40 mAb Promotes Kidney Immunoregulatory Capacity in NHP Transplants by Altering Kidney Tubular Cell (TEC) Expression of CD40 and IL-6.
Treatment of cynolmolgus monkey (NHP) renal transplant recipients with a combination of 2 rhesus-mouse chimeric α-CD45RB (r6G3R1; 6G3) and α-CD40 (r2C10R4; 2C10) mAbs increased circulating…2017 American Transplant Congress
Memory T Cells Are Decreased in Transplant Recipients Deficient in miR-182.
Transplant Immunology Lab/Division of Abdominal Transplant, Stanford University, Stanford
MicroRNAs (miRNAs) are small non-coding RNA molecules that regulate the post-transcriptional expression of target genes. There is ample evidence that miRNAs are involved in the…2017 American Transplant Congress
Combination αCD28+αCD40 Costimulation Blockade Attenuates Acute and Chronic Rejection in Non-Human Primates.
University of Maryland School of Medicine, Baltimore, MD
Purpose: Monotherapy using αCD28 or αCD40 antibodies significantly prolongs graft survival but does not induce tolerance in non-human primates (NHP). Here, we evaluate the relative…2017 American Transplant Congress
Ex vivo Expanded Regulatory T cells Combined with Short-Term Costimulation Blockade Prevent Rejection of Vascularized Composite Allografts.
Plastic and Reconstructive Surgery, Johns Hopkins University School of Medicine, Baltimore, MD
[Background] Reconstructive transplantation represents a valid therapeutic option after devastating tissue loss. Routine clinical application, however, is hampered by the toxicity of long-term maintenance immunosuppression.…2017 American Transplant Congress
Dual Costimulatory Blockades Failed to Achieve Transplant Tolerance Despite Induction of Mixed Chimerism in NHPs.
Background: Our previous studies showed that substantial deletion of CD8+ memory T cells (TMEM) was necessary to induce mixed chimerism (MC) and allograft tolerance when…2017 American Transplant Congress
Chimerism-Related Allotolerance Is Induced by Exosome Acquisition and Reprogramming of Host Dendritic Cells.
Maternal microchimerism (MMc) has been associated with allo-specific graft tolerance in mice and humans. This tolerance is associated with membrane allo-antigen acquisition (mAAQ), which is…2017 American Transplant Congress
Extracellular Mitochondria Cause B7 Costimulation Blockade Resistant Allograft Rejection in Mice.
1Surgery, Duke University, Durham, NC; 2Immunology, Duke University, Durham, NC
Introduction: Mitochondria released in the setting of tissue injury and cell death are a source of damage-associated molecular patterns that activate innate immune responses. We…2017 American Transplant Congress
Does Blockade of ICOS/ICOS-L Pathway Act Synergistically with αCD40 Costimulation Pathway Blockade?
University of Maryland School of Medicine, Baltimore, MD
Purpose: Inducible costimulator (ICOS) on T cells enhances basic T cell responses to foreign antigen, and increased ICOS expression is detected in association with pathogenic…
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