Antigen-specific suppression of cytotoxic T cell responses: an idiotype-bearing factor regulates the cytotoxic T cell response to azobenzenearsonate-coupled cells.

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Abstract
When A/J mice are injected subcutaneously with azobenzenearsonate- (ABA) coupled spleen cells, their splenocytes contain primed ABA-specific cytotoxic T lymphocyte (CTL) precursors. Animals that are not primed in vivo do not develop vigorous CTL activity when assessed after in vitro culture with ABA-coupled stimulators. Suppressor molecules derived from ligand-induced first-order ABA-specific suppressor T cells were evaluated for their ability to limit cytolytic T cell development. We have shown that an idiotype-bearing, hapten-specific suppressor factor suppresses priming for CTL in an H-2-unrestricted but allotype-restricted manner. The implication of these studies to regulatory networks is discussed.

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