Induction of transplantation tolerance by intravenous injection of allogeneic lymphocytes across an H-2 class II mismatch. Different mechanisms operate in tolerization across an H-2 class I vs. H-2 class II disparity.
Previously, we have shown that the intravenous (i.v.) injection of allogeneic lymphocytes across an H-2 class I-mutant disparity leads to specific skin allograft tolerance caused by irradiation-sensitive donor T cells, which function as veto cells. In the present study, we show that the i.v. injection of H-2 class II-incompatible spleen cells also results in specific skin allograft tolerance. However, tolerance induction depends on the presence of irradiation-resistant non-T cells in the donor cell inoculum. Thus, different mechanisms operate in tolerance induction across an H-2 class I vs. H-2 class II mismatch. I.v. injection of allogeneic spleen cells across an H-2 class I plus class II disparity does not result in skin allograft tolerance. Finally, our data show that transfusion-induced suppression of the delayed-type hypersensitivity response against alloantigens does not correlate with skin allograft tolerance induced by i.v. injected allogeneic lymphocytes. In conclusion, the type of H-2 mismatch between transfusion donor and recipient not only determines the occurrence of allograft tolerance but also the mechanism leading to tolerization.
van Twuyver
E
E
Central Laboratory of the Netherlands Red Cross Blood Transfusion Service, Amsterdam.
Kast
W M
WM
Mooijaart
R J
RJ
Melief
C J
CJ
De Waal
L P
LP
D000818:Animals; D001803:Blood Transfusion; D006085:Graft Survival; D006183:H-2 Antigens / Q000276:immunology*; D000949:Histocompatibility Antigens Class II / Q000276:immunology*; D006968:Hypersensitivity, Delayed / Q000276:immunology; D007108:Immune Tolerance; D051379:Mice; D008815:Mice, Inbred Strains; D016038:Skin Transplantation / Q000276:immunology*; D013154:Spleen / Q000166:cytology / Q000276:immunology
D006183:H-2 Antigens; D000949:Histocompatibility Antigens Class II