14 August 2001
Continuous alloantigen elimination--a concept for allograft tolerancer.
W L OlszewskiAnn Transplant 2000; 5(4): 14-19 :: ID: 607130
Abstract
The "enhancement" phenomenon evoked in rats by administration of donor lymphocytes and recipient-anti-donor-lymphocyte antibodies prior to organ transplantation brings about "continuous alloantigen elimination". This new concept is based on the experimental data from studies on the distribution of radiolabelled alloantigen and alloantibody in the recipient lymphoid organs and suggests that immediately after organ transplantation to the "enhanced" recipient, the circulating antibodies bind to the donor transplantation antigens both on endothelial cells and those shed into recipient blood circulation. The formed alloantigen-alloantibody complexes are trapped in the spleen and after opsonization and binding to the migrating splenocytes are transported to the liver for further processing. The process of continuous binding of alloantigen and elimination as alloantibody-alloantigen complexes in the lymphoid organs of the recipient prevents activation of the recipient effector cells and their migration to the graft. The organ grafts survive above 100 days. Although there is no evident rejection in the allograft itself a phenomenon of "rejection alert" is seen in the lymphoid tissue. The lymphocytes originating from the organ graft donor injected intravenously are rejected in the "enhanced" recipient spleen and nodes within 6 hours. The "physiological" site of elimination (rejection) of alloantigens are the lymphoid organs, as it happens with invading pathogens. The allotransplant is spared since its alloantigens are "blocked" by anti-donor-specific antibodies, the complexes are continuously detached and washed-off by the percolating blood and eliminated in the lymphoid tissues and liver.
Keywords: Antigen-Antibody Complex - metabolism, Graft Survival - immunology, Heart Transplantation - immunology, Immune Tolerance, Isoantibodies - metabolism, Isoantigens - metabolism, Lymphoid Tissue - metabolism, Skin Transplantation - immunology, Transplantation Immunology, Transplantation, Homologous
In Press
08 Mar 2024 : Original article
Association of Coronary Calcium Score on Cardiac PET During Pre-Kidney Transplant Assessment with Persisten...Ann Transplant In Press; DOI: 10.12659/AOT.943532
14 Mar 2024 : Original article
Impact of Blood Products Transfusion on Patients in the Immediate Post-Lung Transplant Period: A Cohort StudyAnn Transplant In Press; DOI: 10.12659/AOT.943652
14 Mar 2024 : Case report
Treatment of Cavernous Transformation of Portal Vein Caused by Hepatic Cystic Echinococcosis Using Ex Vivo ...Ann Transplant In Press; DOI: 10.12659/AOT.942358
15 Mar 2024 : Review article
Approaches and Challenges in the Current Management of Cytomegalovirus in Transplant Recipients: Highlighti...Ann Transplant In Press; DOI: 10.12659/AOT.941185
Most Viewed Current Articles
05 Apr 2022 : Original article
Impact of Statins on Hepatocellular Carcinoma Recurrence After Living-Donor Liver TransplantationDOI :10.12659/AOT.935604
Ann Transplant 2022; 27:e935604
12 Jan 2022 : Original article
Risk Factors for Developing BK Virus-Associated Nephropathy: A Single-Center Retrospective Cohort Study of ...DOI :10.12659/AOT.934738
Ann Transplant 2022; 27:e934738
22 Nov 2022 : Original article
Long-Term Effects of Everolimus-Facilitated Tacrolimus Reduction in Living-Donor Liver Transplant Recipient...DOI :10.12659/AOT.937988
Ann Transplant 2022; 27:e937988
15 Mar 2022 : Case report
Combined Liver, Pancreas-Duodenum, and Kidney Transplantation for Patients with Hepatitis B Cirrhosis, Urem...DOI :10.12659/AOT.935860
Ann Transplant 2022; 27:e935860