[Inactivation of hematopoietic stem cells by means of lymphocytes depending upon the genotype of the interacting cells].

Inoculation of a mixture of bone marrow cells with allogeneic lymphocytes into irradiated mice of inbred strains or into F1 hybrids results in the depression of bone marrow cell proliferation in the spleen of the recipient: the effect of inactivation of nonsyngeneic stem cells. The inactivation of stem cells by allogeneic lymphocytes can be detected in all tested combinations of mice strains - donors of lymphocytes and bone marrow cells and mice - recipients but the degree of inactivation differs and depends on the genotype of cell donors rather than on the genotype of the recipient. Lymphocytes of some mice strains (haplotypes H-2k and H-2a) are more active killers of bone marrow cells as compares with lymphocytes of other strains (hyplotypes H-2b and H-2d). Probably, the degree of stem cells inactivation by lymphocytes depends on the differences of their histocompatibility in H-2 system.