title: [Influence of cell-cell interaction upon differentiation of murine embryonal carcinoma cells].
abstract: Embryonal carcinoma (EC) cells are the pluripotent stem cells of teratocarcinoma. The aggregates of P19, a mouse EC cell line, undergo differentiation and rapidly lose its colony-forming ability in culture with retinoic acid (RA) or DMSO. Loss of plating efficiency is used to assess the rate of drug-induced differentiation. When exposed respectively to DMSO or RA, the isolated EC cell mutants (D3 and RAC65) did not differentiate but the gap junctions could be formed. In RA-treated co-aggregates of RAC65 and O1A1, each cell line gave responses independent of the presence of the other cell line. However, in DMSO-treated co-aggregates of P19 and D3, D3 cells remained undifferentiated and P19 cell differentiation was much poorer than that in the absence of D3 cells. The results suggest that cell-cell interaction be present in the early stage of DMSO-induced differentiation and absent in the early stage of RA-induced differentiation.
mesh_terms: D000818:Animals; D002450:Cell Communication; D002454:Cell Differentiation / Q000187:drug effects*; D002460:Cell Line; D004121:Dimethyl Sulfoxide / Q000494:pharmacology; D051379:Mice; D013724:Teratoma / Q000473:pathology*; D014212:Tretinoin / Q000494:pharmacology
chemical_list: D014212:Tretinoin; D004121:Dimethyl Sulfoxide