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Spleen cells from H-2b,k,d C57Bl/10 congenic mice were sensitized in vitro to trinitrobenzenesulfonate (TNBS)-modified autologous spleen cells. Cold target competition studies at the lytic phase demonstrated three distinct patterns of cytotoxic responsiveness: (a) H-2b spleen cells generated approximately equivalent CTL responses against Kb and Db modified self products, (b) H-2d spleen cells generated preferential responses against Dd modified self products, and (c) H-2k spleen cells generated cytotoxic responses which could only be detected against Kk self products in association with TNP. F1 spleen cells were sensitized against autologous TNBS-treated cells. The results showed that, although H-2b parental cells generated approximately equivalent Kb-TNP- and Db-TNP-specific CTL, the presence of the H-2b haplotype did not result in the generation of (a) Dk-TNP CTL response by (H-2b x H-2k) spleen cells, nor (b) a Db CTL response by (H-2b x H-2a) F1 spleen cells. Additionally, (H-2d x H-2k) F1 cells failed to generate detectable Dd-TNP-specific CTL, although H-2d parental cells generated D-regional-specific CTL. The findings demonstrated that these F1 response patterns paralleled those of the H-2k and H-2a parents, i.e. weak or no D-region TNP-specific CTL were induced. Because (H-2d x H-2a) F1 responders stimulated with H-2d TNBS-treated cells did generate good Dd TNP responses, the results illustrated that the presence of responder genes was not sufficient to result in a D-region TNP CML. It is suggested that the absence of Kk alleles on the stimulating population is necessary for the generation of D-region TNP CTL in these F1's. Mechanisms which could account for these response patterns in parental F1 mice are discussed including immunodominance, suppression, T-cell response , and Ir-gene defects.

the journal of experimental medicine/the journal of experimental medicine

Regulation of T-cell-mediated lympholysis by the murine major histocompatibility complex. I. Preferential in vitro responses to trinitrophenyl-modified self K- and D-coded gene products in parental and F1 hybrid mouse strains.