Summary
In vitro growth of rat atriocaval epithelial tumor cells (ACT-1) was enhanced by the inclusion of xenogeneic mouse adherent peritoneal exudate cells (PECs) in a two-layer soft agar system. A linear relationship was found between the number of cells plated and the number of colonies when ACT-1 tumor cells were plated at plating densities of between 1 and 5×105 cell/60 mm plate (r=0.9,P<0.001). Inclusion of irradiated PECs in the bioassay for tumor stem cells resulted in a two and a half-fold increase in colony formation in three separate experiments (P<0.001).
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This work was supported by grants from the Cancer Research Trust, the University of Otago Cancer Research Fund and by the Medical Research Committee (Golden Kiwi).
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Beagley, K.W., Horne, L.S., Noronha, R.F.X. et al. Enhancement of rat ACT-1 tumor clonogenicity by xenogeneic mouse macrophages. In Vitro 20, 623–628 (1984). https://doi.org/10.1007/BF02619611
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DOI: https://doi.org/10.1007/BF02619611