title: Di-(2-ethylhexyl)phthalate (DEHP) increases Bcl-2/Bax ratio and modifies c-myc expression in Syrian hamster embryo (SHE) cells.
abstract: The objective of this work was to study the anti-apoptotic properties of the non-genotoxic rodent carcinogen, di(2-ethylhexyl)phthalate (DEHP) in Syrian hamster embryo (SHE) cells. We demonstrated that a 24 h pre-treatment of SHE cells with 50 microM DEHP inhibited apoptosis triggered by growth factors deprivation. The RNA expression levels of the regulator genes involved in the apoptotic pathway, bcl-2, bax and of c-myc were measured using Western blotting and RT-PCR. We showed that a 24 h treatment of SHE cells with 50 microM DEHP increased (P < 0.05) the bcl-2 expression, while c-myc expression was decreased. No effect on bax expression was observed in the range of 10-50 microM. The defective regulation of apoptosis caused by DEHP treatment could contribute to its carcinogenicity.
authors.affiliation: ESE, Université de Metz, Faculté des Sciences, Campus Bridoux, rue du Général Delestraint, 57070 Metz, France. marie-aline.maire@laposte.net
authors.forename: M A
authors.initials: MA
authors.lastname: Maire
authors.forename: C
authors.initials: C
authors.lastname: Rast
authors.forename: P
authors.initials: P
authors.lastname: Vasseur
mesh_terms: D000818:Animals; D017209:Apoptosis / Q000187:drug effects*; D002471:Cell Transformation, Neoplastic / Q000139:chemically induced; D002478:Cells, Cultured; D006224:Cricetinae; D004051:Diethylhexyl Phthalate / Q000633:toxicity*; D008647:Mesocricetus; D019253:Proto-Oncogene Proteins c-bcl-2 / Q000032:analysis*; D016271:Proto-Oncogene Proteins c-myc / Q000032:analysis*; D051028:bcl-2-Associated X Protein
chemical_list: D019253:Proto-Oncogene Proteins c-bcl-2; D016271:Proto-Oncogene Proteins c-myc; D051028:bcl-2-Associated X Protein; D004051:Diethylhexyl Phthalate