PT  - JOURNAL ARTICLE
AU  - Pettinelli, C B
AU  - Ahmann, G B
AU  - Shearer, G M
TI  - Expression of both I-A and I-E/C subregion antigens on accessory cells required for in vitro generation of cytotoxic T lymphocytes against alloantigens or TNBS-modified syngeneic cells.
DP  - 1980 Apr 01
TA  - The Journal of Immunology
PG  - 1911--1916
VI  - 124
IP  - 4
4099  - http://www.jimmunol.org/content/124/4/1911.short
4100  - http://www.jimmunol.org/content/124/4/1911.full
SO  - J. Immunol.1980 Apr 01; 124
AB  - We have previously reported that radioresistant, Thy 1-negative accessory cells (SAC) are required for the in vitro generation of cytotoxic T-effector cells to allogeneic or trinitrophenyl-modified syngeneic cells. These SAC were found to provide accessory functions irrespective of whether they were syngeneic, semi-syngeneic, or allogeneic to the responding cells. To further characterize the accessory cells active in CML, the expression of Ia antigens on this functional population was assessed by pretreated SAC with anti-Ia reagents and complement and by testing the accessory cell function of these treated populations. The results of these studies demonstrated that the relevant accessory cells for allogeneic and TNP-self CTL express Ia determinants encoded by genes mapping in the I-A and I-E/C subregions. For the TNP-self CTL the accessory function of both SAC syngeneic or allogeneic to the responding and stimulating cells was specifically abrogated by treatment with anti-Ia reagents and complement.