Articles tagged "Alloantibodies"

2021 American Transplant Congress
The Trifecta Study: Calibrating Circulating Donor-Derived Cell-Free DNA at the Time of Indication Biopsies Against the Molecular Phenotype of the Biopsy Reveals a Prominent Association with NK Cell Genes
P. Halloran¹, Z. Demko², A. Prewett², J. Reeve¹, P. Billings²
¹Alberta Transplant Applied Genomics Centre, Edmonton, AB, Canada, ²Natera Inc., San Carlos, CA
*Purpose: The international, multicenter, prospective Trifecta study was designed to calibrate dd-cfDNA% measurements in blood at the time of indication biopsy against the molecular characteristics…
2021 American Transplant Congress
The Clinical Significance of Preformed Anti-HLA-DQ Donor-specific Antibodies on Allograft Outcomes in Kidney Transplantation
S. Lee¹, C. Yang², B. Chung²
¹Seoul National University Hospital, Seoul, Korea, Republic of, ²Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea, Republic of
*Purpose: De-novo anti-HLA-DQ donor-specific antibody (DSA) has been identified as a risk factor for late graft dysfunction and graft loss in kidney transplantation (KT). The…
2021 American Transplant Congress
CD56^dimCD16^bright NK Cells from Kidney Transplant Recipients with Antibody-mediated Rejection Display Increased Proliferation, Type-1 Activation and Cytotoxic Profile
E. Bailly¹, C. Macedo¹, K. Louis¹, B. Ramaswami¹, M. Lucas¹, C. Bentlejewski¹, P. Randhawa¹, A. Zeevi¹, C. Lefaucheur², D. Metes¹
¹Department of Surgery, Thomas E. Starzl Transplantation Institute, Pittsburgh, PA, ²INSERM UMR-S976. Endothelium, Inflammation & Alloreactivity, Université de Paris, Paris, France
*Purpose: CD56dimCD16bright NK cells are highly potent for cytotoxicity through cell-mediated cytotoxicity (CMC), antibody-dependent cell-mediated cytotoxicity (ADCC) and INF-γ production. The contribution of NK cells…
2021 American Transplant Congress
Clazakizumab (clz, Anti-il-6 Antibody) Treatment Affects Il-6/il-6r Signaling by Increasing Soluble Gp130 (sgp130) in Hla-sensitized Kidney Transplant Patients (hs Ktx Pts) Treated for Chronic Antibody-mediated Rejection (cabmr)
B. Shin, S. Ge, A. Jimenez, N. Ammerman, A. Vo, R. Zhang, S. C. Jordan, M. Toyoda
Cedars-Sinai Medical Center, Cerritos, CA
*Purpose: IL-6 is a pro-inflammatory cytokine responsible for chronic vascular inflammation and a promising target for cABMR modulation. IL-6/sIL-6R complex initiates more pathogenic trans-signaling pathways…
2021 American Transplant Congress
Natural Sensitization by Pregnancy, Testing Desensitization Strategies in Female NHPs Across Repeat Mismatches
M. Manook, J. Yoon, Z. Fitch, R. Schmitz, A. M. Jackson, J. Kwun, S. Knechtle
Duke Transplant Center, Duke University Medical Center, Durham, NC
*Purpose: Women are disproportionately represented in the highly sensitized patient cohort, and HLA-incompatible transplantation is undertaken predominantly in females. However, nonhuman primate (NHP) models to…
2021 American Transplant Congress
Antibody-mediated Rejection and Sponge Effect in a Redo Lung Transplant Recipient: A Case Report
A. Arjuna, M. T. Olson, S. Tokman, R. Walia, T. Mohanakumar, A. S. Hashimi, M. A. Smith, R. M. Bremner, A. Omar
Norton Thoracic Institute, St. Joseph's Hospital and Medical Center, Phoenix, AZ
*Purpose: Antibody-mediated rejection (AMR) typically presents with elevated titers of circulating donor specific antibodies (DSA) and increased mean fluorescence intensity (MFI), a surrogate marker for…
2021 American Transplant Congress
AT-1501, a Novel and Clinically Applicable CD40L Specific Monoclonal Antibody, Promotes Islet Allograft Survival in Nonhuman Primates
D. Berman¹, N. Kenyon¹, M. Willman¹, A. Gill², S. Perrin³, C. Ricordi¹
¹University of Miami, Miami, FL, ²ALS Therapy Development Institute, Cambridge, MA, ³Novus Therapeutics, Irvine, CA
*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
Impact of Bacterial Infection on HLA Allosensitization Among Kidney Recipients on the Waitlist
D. P. Cina¹, K. R. Sherwood², S. Dobrer², J. Wong³, F. Fenninger², M. Kadatz⁴, P. Keown⁴, J. Lan⁴
¹Department of Urologic Sciences, University of British Columbia, Vancouver, BC, Canada, ²University of British Columbia, Vancouver, BC, Canada, ³Department of Laboratory Medicine, Vancouver General Hospital, Vancouver, BC, Canada, ⁴Department of Nephrology, University of British Columbia, Vancouver, BC, Canada
*Purpose: The clinical relevance of HLA allosensitization associated with bacterial infection remains poorly defined. The primary objective of this study is to determine the incidence,…
2021 American Transplant Congress
Engineered Human Glomerular Endothelial Cells to Identify Non-hla Antibodies and Decipher Their Pathogenicity After Kidney Transplantation
B. Lamarthée¹, C. Burger¹, C. Leclaire¹, L. Morin¹, F. Terzi¹, C. Tinel¹, D. Anglicheau²
¹Inserm U1151, Necker-Enfants Malades Institute, PARIS, France, ²Necker Hospital, AP-HP, Department of Nephrology and Kidney Transplantation, PARIS, France
*Purpose: In kidney transplantation recipients (KTRs), donor-specific antibodies directed against Human Leucocyte Antigens (HLA-DSA) are thought to drive antibody-mediated rejection (AMR) and poor transplant outcome.…
2021 American Transplant Congress
Belatacept and Carfilzomib-based Treatment of Active Antibody-mediated Rejection in a Sensitized Nonhuman Primate Model
J. Kwun¹, R. Schmitz¹, M. Manook¹, Z. Fitch¹, D. Olaso¹, A. Choi¹, J. Yoon¹, Y. Bae¹, J. Lambris², S. Knechtle¹
¹Surgery, Duke University, Durham, NC, ²Pathology & Laboratory Medicine, University of Pennsylvania, Philadelphia, PA
*Purpose: One third of sensitized, HLA-incompatible transplant recipients experience antibody-mediated rejection (AMR) with limited effective treatment options. We tested a novel treatment strategy for AMR…