Macrophage monolayers from the DBA/2-derived antigenic solid SL2 lymphoma and macrophage monolayers from the Wistar R-derived antigenic hepatoma 448 specifically inhibited the growth of, respectively, SL2 lymphoma cells and hepatoma 448 cells in vitro. However, macrophage monolayers, prepared from the C57BL-derived nonantigenic TLX9 lymphoma did not suppress growth of tumor, cells in vitro.
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Loveren et al. (1974) studied this question.