Cell Types Required for H-2-restricted Cytotoxic Responses Generated by Trinitrobenzene Sulfonate-modified Syngeneic Cells or Trinitrophenyl-conjugated Proteins

Murine spleen cells were fractionated over nylon wool or Sephadex G-10 columns, and the cell types involved in the generation of trinitrophenyl (TNP)-specific, H-2 restricted (TNP-self) cytotoxic effector cells were studied from cultures stimulated with trinitrobenzene sulfonate (TNBS)-modified syngeneic cells, TNP-conjugated soluble proteins such as bovine gamma-globulin (TNP-BGG), or bovine serum albumin (TNP-BSA). Unfractionated or nylon nonadherent responding cells generated such effectors, irrespective of whether the cultures were stimulated with TNBS-modified cells or TNP-conjugated proteins. TNP-modified T lymphocytes, B lymphocytes, and phagocyte-enriched spleen cells were all capable of stimulating TNP-self effectors. TNP-self effectors. TNP-self as well as allogeneic cytotoxic responses were dependent on the presence of a radioresistant non-T cell that was removed by Sephadex G-10 fractionation and was replaced by irradiated, Thy 1.2-negative, glass adherent spleen cells, enriched in phagocytic cells. Results obtained by using glass adherent cells that were allogeneic or semi-syngeneic to the responding cells indicated that H-2 homology was not required for efficient glass adherent cell function, and that the H-2 restriction of TNP-self effectors is not determined by these glass adherent cells.