title: Definition of alien H-2 determinants on a Friend leukaemia by analysis of alloreactivity of CTL from primary MLC.
abstract: A Friend virus-induced tumour of BALB/c (H-2d) origin, HFL/d, was examined for the expression of alien H-2 antigens. The alloantigens on HFL/d were typed by generating CTL in primary MLC with HFL/d as stimulator and measuring reactivity to targets with known H-2 antigens, and confirmed by assessing recognition of HFL/d targets by CTL generated in primary MLC with stimulators expressing known H-2 antigens. Potential cross-reactivities between alloantigens were analysed by cold-target inhibition experiments. BALB/c cells stimulated with HFL/d lysed H-2b targets, and BALB/c anti-H-2b CTL lysed HFL/d; analysis with recombinant haplotypes demonstrated both H-2Kb and H-2Db alien antigens antigens on HFL/d. C57BL/6 (H-2b) cells stimulated with HFL/D recognized H-2Kd, H-2Dd, and an additional determinant unique to HFL/d. (BALB/c x B6)F1 cells also recognised a unique HFL/d determinant not of H-2b or H-2d origin. These unique determinants, which induced a strong cytotoxic response in primary MLC, were not shared by BALB/c or B6 tumours induced by cross-reactive FMR viruses. Thus, HFL/d expressed the K and D antigens of its strain of origin, two typed alien H-2 antigens, and at lest one other untyped antigen which may represent an additional H-2 determinant. These studies further demonstrate the utility of examining the reactivity of CTL generated in primary MLC to probe for the presence of alien H-2 antigens.
mesh_terms: D000818:Animals; D000951:Antigens, Neoplasm / Q000235:genetics*; D003429:Cross Reactions; D000939:Epitopes / Q000235:genetics*; D005260:Female; D005622:Friend murine leukemia virus; D006183:H-2 Antigens / Q000235:genetics*; D007942:Leukemia, Experimental / Q000276:immunology; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C / Q000235:genetics; D008810:Mice, Inbred C57BL / Q000235:genetics; D010641:Phenotype
chemical_list: D000951:Antigens, Neoplasm; D000939:Epitopes; D006183:H-2 Antigens