title: Comparison of propylene oxide and epichlorohydrin effects in two transformation tests (C3H/10T1/2 and SHE cells).
abstract: The neoplastic cell transformation induced by propylene oxide (PO) and epichlorohydrin (ECH) was studied in two in vitro assays, mouse embryo fibroblasts (C3H/10T1/2) and Syrian hamster embryo (SHE) cells. In C3H/10T1/2 cells treated with PO (2.5-10 mM), the transformation frequencies were enhanced about 2-4 times in the presence of 12-O-tetradecanoylphorbol-13-acetate (TPA), compared with the transformation frequencies in the absence of TPA. In SHE cells, an even higher increase (about 6-9 times) was reached at concentrations of 2.5-20 mM. The presence of TPA strongly influenced the ability of ECH to induce the morphological transformation at low-moderate concentrations (0.25-1 mM). At the highest concentrations applied, 1 mM in C3H/10T1/2 cells and 0.5 mM in SHE cells, 41- and 4-fold increases, respectively, were observed. In C3H/10T1/2 cells, the rad-equivalence (rad/mMh) of PO and ECH in the presence of TPA was calculated to be 36 +/- 8 and 296 +/- 65 (mean +/- S.E.), respectively.
authors.affiliation: Department of Radiobiology, Stockholm University, Sweden.
authors.forename: A
authors.initials: A
authors.lastname: Kolman
authors.forename: M
authors.initials: M
authors.lastname: Dusinská
mesh_terms: D000818:Animals; D002273:Carcinogens / Q000633:toxicity*; D002470:Cell Survival / Q000187:drug effects; D002471:Cell Transformation, Neoplastic / Q000187:drug effects*; D002478:Cells, Cultured; D006224:Cricetinae; D004811:Epichlorohydrin / Q000633:toxicity*; D004852:Epoxy Compounds / Q000633:toxicity*; D005260:Female; D051379:Mice; D008809:Mice, Inbred C3H; D009152:Mutagenicity Tests; D011247:Pregnancy; D013755:Tetradecanoylphorbol Acetate / Q000494:pharmacology
chemical_list: D002273:Carcinogens; D004852:Epoxy Compounds; D004811:Epichlorohydrin; D013755:Tetradecanoylphorbol Acetate; C009068:propylene oxide