Immunosuppressive factor(s) specific for L-glutamic acid50-L-tyrosine50 (GT). III. Generation of suppressor T cells by a suppressive extract derived from GT-primed lymphoid cells
- PMID: 302317
- PMCID: PMC2180821
- DOI: 10.1084/jem.146.4.970
Immunosuppressive factor(s) specific for L-glutamic acid50-L-tyrosine50 (GT). III. Generation of suppressor T cells by a suppressive extract derived from GT-primed lymphoid cells
Abstract
Injection of mice with L-glutamic acid50-L-tyrosine50 (GT)- or L-glutamic acid60-L-alanine30-L-tyrosine10 (GAT)-specific suppressor T-cell factor (GT-TsF or GAT-TsF) up to 5 wk before antigenic challenge challenge suppresses GT-methylated bovine serum albumin (MBSA) and GAT-MBSA plaque-forming cells responses. T suppressor cells are responsible for the suppression induced by the suppressive extract as demonstrated by adoptive transfer and sensitivity to anti-Thy-1 and complement treatment. We conclude that suppressive extract induces specific suppressor T cells. The material responsible for generation of suppressor T cells is a product of the I subregion of the H-2 complex. We have excluded that suppressive quantities of antigens are present in the extract. A/J mice, which can neither be suppressed by GT nor make GT-TsF can be suppressed by BALB/c GT-tsf. Spleen cells from BALB/c GT TsF-primed A/J mice can adoptively transfer suppression to normal syngeneic recipients. A/J mice appear to be genetically defective in cells involved in factor production. These results are discussed in the light of a two-step model for induction of antigen-specific suppressor cells.
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