title: Chemical cocarcinogenesis with the use of a subclone derived from Balb/3T3 cells with catechol as cocarcinogen.
abstract: This study was performed for the detection of cocarcinogens by transformation in vitro with the use of a subclone of a Balb/3T3 cell line. Dose response, cytotoxicity, and transformation studies were done with the use of an indirect-acting carcinogen, benzo[a]pyrene (B[a]P), a direct-acting alkylating carcinogen, beta-propiolactone (BPL), and the mouse skin cocarcinogen catechol. The rate of transformation was notably higher in groups treated with B[a]P and catechol or BPL and catechol than in groups treated with either B[a]P or BPL. Catechol alone did not induce any transformation. All the cells isolated from the transformed foci showed characteristics of malignantly transformed cells, such as anchorage-independent growth. Thus chemical cocarcinogenesis was accomplished in vitro similar to that accomplished in in vivo studies reported earlier on mouse skin.
mesh_terms: D000818:Animals; D001580:Benzopyrenes; D002396:Catechols / Q000633:toxicity*; D002460:Cell Line; D002471:Cell Transformation, Neoplastic / Q000139:chemically induced*; D002999:Clone Cells; D003043:Cocarcinogenesis; D003114:Colony-Forming Units Assay; D004305:Dose-Response Relationship, Drug; D051379:Mice; D008807:Mice, Inbred BALB C; D011420:Propiolactone
chemical_list: D001580:Benzopyrenes; D002396:Catechols; D011420:Propiolactone