title: N,N-Dimethylformamide-induced morphological differentiation and reduction of tumorigenicity in cultured mouse rhabdomyosarcoma cells.
abstract: N,N-Dimethylformamide treatment of cell cultures established from a transplantable murine rhabdomyosarcoma-induced morphological differentiation and a marked reduction in the tumorigenicity of the sarcoma cells. Fourteen of 17 CE/J mice receiving injections of inducer-treated cells did not develop tumors after 6 months, whereas all 21 mice receiving inocula of untreated sarcoma cells died of disease between 11 and 31 days. The drug-treated cells did not grow in soft agar; untreated tumor cells grew in the semisolid medium. The untreated tumor cells showed a reduced serum requirement and had a higher saturation density compared to drug-treated cells. Thus the reduction in tumorigenicity of N,N-dimethylformamide-treated cells correlated with certain in vitro growth properties that are more characteristic of normal, mesenchymally derived cells than of sarcoma cells.
mesh_terms: D000818:Animals; D003994:Bucladesine / Q000494:pharmacology; D002454:Cell Differentiation; D002455:Cell Division / Q000187:drug effects; D002470:Cell Survival / Q000187:drug effects; D002478:Cells, Cultured; D004126:Dimethylformamide / Q000494:pharmacology*; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D008819:Mice, Nude; D009368:Neoplasm Transplantation; D012208:Rhabdomyosarcoma / Q000188:drug therapy* / Q000473:pathology; D012513:Sarcoma, Experimental / Q000188:drug therapy / Q000473:pathology; D014184:Transplantation, Homologous
chemical_list: D003994:Bucladesine; D004126:Dimethylformamide