title: Toxic action of etoposide on mouse peritoneal macrophages and its modulation by interleukin 3.
abstract: In the present work, we have studied the toxic action of etoposide on mouse peritoneal macrophages. First, we have determined the induction of DNA fragmentation by this antitumour compound. To study the possible influence of interleukin 3 on the effects of etoposide on mouse macrophages, we studied intracellular protein phosphorylation induced by interleukin 3. After incubation of the cells in the presence of interleukin 3, increased phosphorylation levels of proteins of estimated molecular weights of around 29,000, 34,000, 50,000 and 61,000 daltons were observed. We have also investigated a possible influence of interleukin 3 on DNA degradation induced by etoposide. The changes of Bax levels induced by etoposide that we have observed seemed to be modulated by this cytokine. From these results, a possible role of interleukin 3 can be suggested in the attenuation of some toxic effects produced by etoposide in mouse peritoneal macrophages. Thus, a therapeutic application of interleukin 3 on antitumour treatments in cells from the mononuclear phagocytic system might be proposed.
authors.affiliation: Departamento de Bioquímica y Biología Molecular, Campus Universitario, Universidad de Alcalá, Madrid, Spain.
authors.forename: Gemma
authors.initials: G
authors.lastname: Olmos
authors.forename: L Alfredo
authors.initials: LA
authors.lastname: Lotero
authors.forename: Angel
authors.initials: A
authors.lastname: Herráez
authors.forename: José C
authors.initials: JC
authors.lastname: Diez
mesh_terms: D000818:Animals; D015153:Blotting, Western; D002478:Cells, Cultured; D053938:DNA Fragmentation / Q000187:drug effects*; D005047:Etoposide / Q000633:toxicity*; D005260:Female; D007377:Interleukin-3 / Q000494:pharmacology*; D017737:Macrophages, Peritoneal / Q000187:drug effects* / Q000378:metabolism; D051379:Mice; D009569:Nitric Oxide / Q000378:metabolism; D010766:Phosphorylation / Q000187:drug effects; D014176:Protein Biosynthesis; D011518:Proto-Oncogene Proteins / Q000096:biosynthesis; D019253:Proto-Oncogene Proteins c-bcl-2; D016159:Tumor Suppressor Protein p53 / Q000096:biosynthesis; D051028:bcl-2-Associated X Protein
chemical_list: C494827:Bax protein, mouse; D007377:Interleukin-3; D011518:Proto-Oncogene Proteins; D019253:Proto-Oncogene Proteins c-bcl-2; D016159:Tumor Suppressor Protein p53; D051028:bcl-2-Associated X Protein; D009569:Nitric Oxide; D005047:Etoposide