Articles tagged "Immunogenicity"

2022 American Transplant Congress
Islet-Derived Exosomes Carry Self-Antigens and May Induce Autoimmunity After Transplantation
S. Vasu¹, C. Darden², J. Mattke², Y. Liu³, M. C. Lawrence³, B. Naziruddin¹
¹Baylor University Medical Ctr, Dallas, TX, ²Baylor University, Waco, TX, ³Baylor University Medical Center, Dallas, TX
*Purpose: Our earlier observations revealed release of exosomes from human islets containing microRNAs (miRNA) specific to islet stress and damage in vitro and in vivo…
2022 American Transplant Congress
Impaired Cellular Immunity and Elevated Myeloid Derived Suppressor Cells in Kidney Transplant Recipients with Impaired Antibody Response to Covid-19 Vaccination
B. Nibhanupudy¹, K. Mcdonald¹, M. Angelis¹, L. T. Chin¹, P. Wai¹, R. Metzger¹, C. Ashokkumar², R. Sindhi²
¹AdventHealth Transplant Institute, Orlando, FL, ²Plexision, Inc, Pittsburgh, PA
*Purpose: To evaluate post-vaccination cellular and antibody (Ab) immunity after COVID-19 vaccination in single blood samples from 17 kidney transplant (KT) recipients who had received…
2022 American Transplant Congress
Antibody Response and Cellular Phenotyping in Kidney Transplant Recipients Following Sars-CoV-2 Vaccination
N. M. Ali¹, J. Miles², S. Mehta¹, V. Tatapudi¹, B. Lonze¹, E. Weldon¹, Z. Stewart¹, C. DiMaggio¹, J. Allen³, S. Gray-Gaillard³, S. Solis³, M. Tuen³, J. Leonard¹, R. Montgomery¹, R. Herati³
¹Transplant Institute, NYU Langone Health, New York, NY, ²CareDx, Brisbane, NY, ³NYU Langone Health, New York, NY
*Purpose: Correlates of protection for SARS-CoV-2 vaccines are not well-established in kidney transplant recipients(KTRs). Studies have highlighted the importance of neutralizing antibodies(Abs), however data suggests…
2022 American Transplant Congress
Safety and Immunogenicity of Live Viral Vaccination After Pediatric Liver and Kidney Transplantation
A. Feldman¹, B. Beaty¹, N. Ebel², J. Ferrolino³, V. Gopalareddy⁴, J. Hollenbeck⁵, C. Jaramillo⁶, N. Kerkar⁷, S. Lerret⁸, G. Maron³, A. Mavis⁹, N. Ovchinsky¹⁰, M. Sell¹¹, T. Sharma¹², J. Stoll¹³, L. Danziger-Isakov¹⁴
¹UCD, Aurora, CO, ²Stanford, Palo Alto, CA, ³St. Jude, Memphis, TN, ⁴LCH, Charlotte, NC, ⁵Michigan Medicine, Ann Arbor, MI, ⁶PCH, Salt Lake City, UT, ⁷URMC, Rochester, NY, ⁸MCW, Milwaukee, WI, ⁹Duke, Durham, NC, ¹⁰Montefiore, NYC, NY, ¹¹MUSC, Charleston, SC, ¹²BCH, Boston, MA, ¹³WUSM, St Louis, MO, ¹⁴CCHMC, Cincinnati, OH
*Purpose: New recommendations suggest that measles-mumps-rubella vaccine (MMR-vx) and varicella vaccine (VZV-vx) may be administered to certain non-immune transplant recipients. The purpose of this study…
2022 American Transplant Congress
Single Blind Randomized Controlled Trial Comparing BNT162b2 Vs JNJ-78436735 Vaccine As An Additional Dose After Two Doses Of BNT162b2 Vaccine In Solid Organ Transplant (SOT) Recipients
Y. Natori¹, E. Martin², A. Mattiazzi³, J. Bini Viotti¹, K. S. Ortecho⁴, S. Pallikkuth⁵, S. Anjan¹, J. Simkins¹, G. Guerra³
¹Department of Medicine, Division of Infectious Diseases, University of Miami, Miami, FL, ²Department of Medicine, Division of Hepatology, University of Miami, Miami, FL, ³Department of Medicine, Division of Nephrology, University of Miami, Miami, FL, ⁴Miami Transplant Institute, Jackson Health System, Miami, FL, ⁵University of Miami, Miami, FL
*Purpose: Even though a high efficacy and immunogenicity of COVID-19 vaccines have been reported in the general population, vaccine immunogenicity is suboptimal in SOT recipients…
2022 American Transplant Congress
Molecular Characterization of the Plasma Secretome in Pediatric Liver Transplantation (pLTx) Identified Cytokine/Chemokine Signatures Potentially Linked to Beneficial Immunosuppressive Regimes (IS) and Recovery
E. Chichelnitskiy¹, L. Ruhl², I. Goldschmidt³, A. Karch⁴, L. Antiga⁵, D. Debray⁶, L. Hierro⁷, D. Kelly⁸, V. McLin⁹, E. Nicastro¹⁰, J. Pawlowska¹¹, P. Czubkowski¹¹, R. Mikolajczyk¹², U. Baumann¹³, C. Falk¹⁴
¹Institute of Transplant Immunology, Hannover Medical School (MHH), Hannover, Germany, ²Institute of Transplant Immunology, MHH, Hannover, Germany, ³Division of Pediatric Gastroenterology and Hepatology, MHH; European Paediatric Liver Transplantation Network, Hannover, Germany, ⁴Research Group Epidemiological and Statistical Methods, Helmholtz Centre for Infection Research, Braunschweig; German Center for Infection Research, TTU-IICH Hannover;Institute for Epidemiology and Social Medicine, University of Münster, Münster, Germany, ⁵Ospedali Riuniti di Bergamo, Bergamo, Italy, ⁶Hôpital Necker-Enfants Malades, Paris, France, ⁷Hospital Infantil Universitario La Paz, Madrid, Spain, ⁸Birmingham Childrens Hosp, Birmingham, United Kingdom, ⁹Service Spécialités Pédiatriques, Genève, Switzerland, ¹⁰Pediatric Hepatology, Gastroenterology and Transplantation, Hospital Papa Giovanni XXIII, Bergamo, Italy, ¹¹Gastroenterology, Hepatology, Nutritional Disorders and Pediatrics, The Children’s Memorial Health Institute, Warsaw, Poland, ¹²Institute of Medical Epidemiology, Biostatistics and Medical Informatics, University of Halle; German Center for Infection Research, TTU-IICH Hannover; MHH, Halle, Germany, ¹³Division of Pediatric Gastroenterology and Hepatology, MHH; Birmingham Children’s Hospital, UK, Hannover, Germany, ¹⁴Institute of Transplant Immunology, MHH; German Center for Infection Research, TTU-IICH, Hannover, Germany
*Purpose: In the European multicentre “ChilSFree” study we aimed to characterize longitudinal dynamics of soluble immune mediators during the first year after pLTx.*Methods: Using Luminex-based…
2021 American Transplant Congress
An HLA Class II Matching Strategy That Predicts De Novo Donor-specific HLA Antibody Formation Using Low Resolution HLA Types
L. Hidalgo¹, I. Martinez Juarez², L. Morales Buenrostro², S. Shojai³, P. Campbell¹
¹University of Wisconsin Madison, Madison, WI, ²Instituto Nacional de Ciencias Medicas Y Nutricion Salvador Zubrian, Mexico City, Mexico, ³Medicine, University of Alberta, Edmonton, AB, Canada
*Purpose: The development of de novo donor-specific HLA antibodies (dnDSA) is predominantly against HLA-Class II antigens and is a function of the degree of HLA-DQ…
2021 American Transplant Congress
Limited Immunogenicity of a Single Dose of Sars-cov-2 Mrna Vaccine in Solid Organ Transplant Recipients
B. Boyarsky, M. Ou, R. Greenberg, A. Teles, W. Werbel, R. Avery, A. Tobian, A. Massie, D. Segev, J. Garonzik Wang
Johns Hopkins, Baltimore, MD
*Purpose: Given substantial challenges with vaccine allocation and evidence for short-term vaccine efficacy after a single dose of SARS-CoV-2 mRNA vaccines in clinical trials, some…
2021 American Transplant Congress
Precision Medicine in Renal Transplantation: Structural Biology of HLA Defines Allelic Binding of Cardinal Pathogenic Viruses in Transplantation
K. R. Sherwood¹, A. Nguyen², J. Tran¹, O. Gunther³, A. Nellore², R. Thompson², J. Lan¹, L. Allan¹, P. A. Keown¹
¹Vancouver General Hospital, Vancouver, BC, Canada, ²Biomedical Engineering, Oregon Health & Science University, Portland, OR, ³Gunther Analytics, Vancouver, BC, Canada
*Purpose: The incidence, clearance and clinical expression of viremia post-Tx are heterogeneous, complicating prediction, prognosis and therapy. We postulated that variation viral presentation related to…
2021 American Transplant Congress
HLA I Antibody-Activated Endothelium Polarized M2-Like Macrophages with Increased Efferocytic and Phagocytic Capacity
J. Nevarez-Mejia¹, X. Wei¹, N. M. Valenzuela¹, M. Rossetti¹, H. Pickering¹, G. A. Fishbein¹, A. Mulder², E. F. Reed¹
¹Pathology and Laboratory Medicine, UCLA, Los Angeles, CA, ²Immunohematology and Blood Transfusion, LUMC, Leiden, Netherlands
*Purpose: The role of intragraft macrophages (Mϕs) during antibody-mediated rejection (AMR) remains unclear. Anti-HLA Abs during AMR drives vascular inflammation as seen by monocyte recruitment…