Role of antibody in rat renal allograft rejection. II. Failure to enhance renal allografts by sensitization to donor class I antigens presented by donor strain erythrocytes.
BN rats were immunized with one or three doses of 1 X 10(8) highly purified LEW erythrocytes (LEW-E) yielding IgM antibody (IgM-BN rats) and IgG antibody (IgG-BN rats) to LEW class I antigens, respectively. LEW kidneys transplanted into IgM-BN rats elicited cytotoxic T cell responses and lymphocytotoxic antibody responses comparable to those elicited by LEW renal grafts in unmodified BN rats. However, LEW kidneys were rejected by IgM-BN hosts in a slightly delayed fashion compared with controls (mean rejection times (MRTs), 9.4 versus 7.1 days); delayed rejection was associated with the absence of anti-LEW IgG hemagglutinins from the recipients' blood and the absence of vasculonecrotic lesions from rejected renal grafts. LEW kidneys inserted into IgG-BN rats were rejected in a slightly accelerated fashion compared with controls (MRT, 6.6 days). Lymphocytotoxins developed in IgG-BN recipients of LEW kidneys in a fashion similar to that of controls, but cytotoxic T cell responses were delayed up to the 6th day after transplantation. These observations confirm our previous finding that cytotoxic T cells do not play a decisive role in acute rejection in this model. The association observed between delayed or accelerated rejection of LEW kidneys by BN rats sensitized with LEW-E and the absence or presence of anti-donor IgG hemagglutinins in the blood of these recipients after transplantation suggests an important role for IgG anti-donor class I antibodies in the rejection of LEW renal allografts by BN rats.
D000818:Animals; D000961:Antilymphocyte Serum / Q000276:immunology*; D004912:Erythrocytes / Q000276:immunology; D006082:Graft Enhancement, Immunologic; D006084:Graft Rejection; D006649:Histocompatibility Antigens / Q000276:immunology; D007074:Immunoglobulin G / Q000276:immunology; D007075:Immunoglobulin M / Q000276:immunology; D016030:Kidney Transplantation; D008297:Male; D051381:Rats; D011914:Rats, Inbred BN; D011917:Rats, Inbred Lew; D013601:T-Lymphocytes / Q000276:immunology*; D013997:Time Factors; D014184:Transplantation, Homologous
D000961:Antilymphocyte Serum; D006649:Histocompatibility Antigens; D007074:Immunoglobulin G; D007075:Immunoglobulin M