title: Non-cytotoxic blocking antibodies and suppressor cells induced by donor-specific transfusions in healthy volunteers and potential kidney transplant recipients.
abstract: Donor-specific transfusion (DST)-induced immunosuppression plays a significant role in clinical and experimental transplantation. To clarify the mechanism of suppression on alloreactivity the suppressor cell induction and the non-cytotoxic blocking antibody production and importance was studied in 15 healthy volunteers and 3 kidney transplant recipients (KTR) after DST on mixed lymphocyte culture (MLC). Significant decrease of anti-donor MLC response was found in all of KTR and in 12 cases of the 15 transfused volunteers. Of 18 cases, 15 had blocking factors in their post-DST serum which strongly (52-91%) inhibited the MLC response. The IgG fractions isolated from the "blocking sera" were responsible for this inhibition. Eighty-one percent of non-cytotoxic blocking antibodies affected the responder cells in MLC and reacted with third party responder cells as well. Both buffy coat and platelet transfusions evoked production of the non-specific blocking antibodies. Our data strongly suggest that DST induces not only the differentiation of suppressor cells and production of anti-idiotypic antibodies, but also the appearance of non-specific, non-cytotoxic antibodies, which may participate in the cell-mediated immune suppression of the alloimmune reactivity.
authors: National Institute of Haematology and Blood Transfusion, Budapest, Hungary.
authors: A
authors: A
authors: Horuzsko
authors: E
authors: E
authors: Gyódi
authors: M
authors: M
authors: Réti
authors: K
authors: K
authors: Onody
authors: F
authors: F
authors: Perner
authors: M
authors: M
authors: Kassay
authors: G G
authors: GG
authors: Petrányi
mesh_terms: D000917:Antibody Formation / Q000276:immunology*; D001379:Azathioprine / Q000008:administration & dosage; D001792:Blood Platelets / Q000276:immunology; D001803:Blood Transfusion; D003602:Cytotoxicity, Immunologic / Q000276:immunology; D015395:Histocompatibility Antigens Class I / Q000276:immunology; D000949:Histocompatibility Antigens Class II / Q000276:immunology; D006801:Humans; D007114:Immunization; D007074:Immunoglobulin G / Q000276:immunology; D007165:Immunosuppression Therapy; D016030:Kidney Transplantation / Q000276:immunology*; D007959:Lymphocyte Culture Test, Mixed; D017710:Lymphocyte Transfusion; D008214:Lymphocytes / Q000276:immunology; D017713:Platelet Transfusion; D050378:T-Lymphocytes, Regulatory / Q000276:immunology*
chemical_list: D015395:Histocompatibility Antigens Class I; D000949:Histocompatibility Antigens Class II; D007074:Immunoglobulin G; D001379:Azathioprine