Specific neonatally induced tolerance to Mls locus determinants.
Neonatal injection of CBA/HT6T6 (H-2k, Mlsb) mice with adult, Mls-incompatible (CBA/J [H-2k, Mlsd] X CBA/HT6T6)F1 spleen cells results in the abrogation of cell proliferation and interleukin 2 (IL 2) production in bulk mixed lymphocyte cultures, when spleen cells from the inoculated mice are tested at 6 to 8 wk of age with stimulator cells expressing the Mlsd of the tolerizing inoculum. In limiting dilution assays, this tolerant state was manifested in a 25- to 550-fold (280-fold average) decrease in the frequency of precursors of Mlsd-responsive IL 2-producing T cells. Tolerance was specific in that the frequencies of precursors of IL 2-producing cells responding to Con A, allogeneic H-2d, and self-Ia were not affected. The observed low frequency of Mls-responsive cells was due neither to extensive chimerism resulting in the dilution of Mlsd-responsive cells by the nonresponsive F1 cells of the inoculum, nor to the action of suppressor cells. These findings indicate that neonatal injection of Mls-incompatible spleen cells produces a state of specific tolerance by a clonal deletion or inactivation mechanism. This specific tolerance supports the view that 1) the Mls locus encodes or regulates the expression of defined alloantigenic determinants and 2) Mls-incompatible responder mice have specific receptors for Mls determinants on clonally distributed IL 2-producing responder T cells.
S
S
Macphail
S T
ST
Ishizaka
M J
MJ
Bykowsky
E C
EC
Lattime
O
O
Stutman
D000818:Animals; D000831:Animals, Newborn / Q000276:immunology; D002678:Chimera; D000939:Epitopes / Q000235:genetics / Q000276:immunology; D006649:Histocompatibility Antigens / Q000235:genetics / Q000276:immunology*; D007108:Immune Tolerance; D007376:Interleukin-2 / Q000096:biosynthesis; D007958:Leukocyte Count; D008213:Lymphocyte Activation; D017710:Lymphocyte Transfusion; D008214:Lymphocytes / Q000276:immunology* / Q000378:metabolism; D051379:Mice; D008807:Mice, Inbred BALB C; D008808:Mice, Inbred CBA; D013154:Spleen / Q000166:cytology; D013234:Stem Cells / Q000276:immunology / Q000378:metabolism; D050378:T-Lymphocytes, Regulatory / Q000276:immunology
D000939:Epitopes; D006649:Histocompatibility Antigens; D007376:Interleukin-2