Aggressiveness of SJL/J lymphomas correlates with absence of H-2Ds antigens.
SJL/J lymphomas emerged as H-2Ds-negative variants upon transplantation of their respective H-2Ds-positive spontaneous tumors. Of nine spontaneous SJL/J lymphomas examined, only two contained detectable numbers of H-2Ds-negative tumor cells. Of seven successfully transplanted tumors, however, four emerged as predominantly H-2Ds-negative tumors by their second transplantation. Long term SJL/J lymphoma lines, RCS 5 and SJL/SJL, were also found to be H-2Ds-negative. The expression of H-2Ks and I-As were maintained on all tumor lines examined. H-2Ds-negative tumor cells were consistent stimulators of syngeneic lymphoproliferation, whereas tumors maintaining H-2Ds expression varied in their stimulatory capacity. Transplantation times required to achieve morbidity in syngeneic mice correlated with tumor cell expression of H-2Ds. Tumors maintaining H-2Ds expression were less aggressive and required 57 to 150 days to produce morbidity compared with highly aggressive H-2Ds-negative tumors that required only 7 to 10 days at one-quarter of the cell dose (10(7) cells). Growth curve analysis based on spleen weights (corrected for body weight) indicated that three types of SJL/J lymphomas could be identified based on their expression of H-2Ds and ability to stimulate syngeneic lymphoproliferation: 1) indolent, nonstimulatory H-2Ds-positive tumors; 2) indolent, stimulatory H-2Ds-positive tumors; and 3) highly aggressive, stimulatory H-2Ds-negative tumors.
D000818:Animals; D000911:Antibodies, Monoclonal / Q000276:immunology; D002471:Cell Transformation, Neoplastic / Q000276:immunology* / Q000473:pathology; D005260:Female; D006183:H-2 Antigens / Q000032:analysis / Q000235:genetics* / Q000276:immunology; D008213:Lymphocyte Activation; D008221:Lymphoid Tissue / Q000473:pathology; D008223:Lymphoma / Q000235:genetics / Q000276:immunology*; D051379:Mice; D008815:Mice, Inbred Strains / Q000276:immunology*; D009368:Neoplasm Transplantation; D010641:Phenotype; D013601:T-Lymphocytes / Q000276:immunology; D013997:Time Factors
D000911:Antibodies, Monoclonal; D006183:H-2 Antigens