Abstract
Local type of the graft-versus-host reaction was induced in adult hybrid mice (CBA X C57BL) F1 by the transfer of splenic, thymus and bone marrow CBA cells subcutaneously into the right hind footpad. The weight gain of the regional knee lymph node and blast accumulation in it 7 days later were used as indices of the graft-versus-host activity. After the transfer of 5 and 20 x 10(6) splenic cells the absolute weight of the regional lymph node was 8-10 times higher than that of the contralateral control; it was also significantly greater in comparison with controls which received live syngeneic or semiallogeneic dead cells from the same source. Contrary to controls, in case of the live cells a direct dose-effect dependency could be seen. The lymph node weight gain was accompanied by a regular immunoblast accumulation. The effect of the thymus and the bone marrow cells was less pronounced than that of the splenic cells.
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