A novel mechanism of resistance to α-difluoromethylornithine induced by cycloheximide. Growth with abnormally low levels of putrescine and spermidine
Treatment of the chemically transformed fibroblasts BP-A31 and other cell lines with low concentrations of cycloheximide (CHM) for 72 h followed by the removal of the protein synthesis inhibitor leads to the proliferation of α-difluoromethylornithine (DFMO)-resistant phenotypes. These drug-resistant...
Guardado en:
Autores principales: | , , , , |
---|---|
Formato: | JOUR |
Materias: | |
Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_00145793_v206_n1_p106_Medrano |
Aporte de: |
id |
todo:paper_00145793_v206_n1_p106_Medrano |
---|---|
record_format |
dspace |
spelling |
todo:paper_00145793_v206_n1_p106_Medrano2023-10-03T14:12:56Z A novel mechanism of resistance to α-difluoromethylornithine induced by cycloheximide. Growth with abnormally low levels of putrescine and spermidine Medrano, E.E. Burrone, O.R. Ferrer, M.M. Cafferata, E.G.A. Algranati, I.D. Cycloheximide Ornithine decarboxylase Polyamine α-Difluoromethylornithine resistance cycloheximide eflornithine putrescine spermidine cell line drug inhibition drug resistance fibroblast in vitro study nonhuman priority journal Animals Cell Line Cycloheximide Drug Resistance Eflornithine Fibroblasts Humans Mice Ornithine Decarboxylase Putrescine Spermidine Treatment of the chemically transformed fibroblasts BP-A31 and other cell lines with low concentrations of cycloheximide (CHM) for 72 h followed by the removal of the protein synthesis inhibitor leads to the proliferation of α-difluoromethylornithine (DFMO)-resistant phenotypes. These drug-resistant cells contain almost no ornithine decarboxylase (ODC) activity and concomitantly very low levels of putrescine and spermidine. Southern blot analysis and measurements of ODC activity and intracellular polyamine levels showed that the described mechanism of inducing resistance to DFMO triggered by CHM does not involve ODC gene amplification, altered transport of the drug or reduced affinity of the enzyme for DFMO. © 1986. Fil:Medrano, E.E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Burrone, O.R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Ferrer, M.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Algranati, I.D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00145793_v206_n1_p106_Medrano |
institution |
Universidad de Buenos Aires |
institution_str |
I-28 |
repository_str |
R-134 |
collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
topic |
Cycloheximide Ornithine decarboxylase Polyamine α-Difluoromethylornithine resistance cycloheximide eflornithine putrescine spermidine cell line drug inhibition drug resistance fibroblast in vitro study nonhuman priority journal Animals Cell Line Cycloheximide Drug Resistance Eflornithine Fibroblasts Humans Mice Ornithine Decarboxylase Putrescine Spermidine |
spellingShingle |
Cycloheximide Ornithine decarboxylase Polyamine α-Difluoromethylornithine resistance cycloheximide eflornithine putrescine spermidine cell line drug inhibition drug resistance fibroblast in vitro study nonhuman priority journal Animals Cell Line Cycloheximide Drug Resistance Eflornithine Fibroblasts Humans Mice Ornithine Decarboxylase Putrescine Spermidine Medrano, E.E. Burrone, O.R. Ferrer, M.M. Cafferata, E.G.A. Algranati, I.D. A novel mechanism of resistance to α-difluoromethylornithine induced by cycloheximide. Growth with abnormally low levels of putrescine and spermidine |
topic_facet |
Cycloheximide Ornithine decarboxylase Polyamine α-Difluoromethylornithine resistance cycloheximide eflornithine putrescine spermidine cell line drug inhibition drug resistance fibroblast in vitro study nonhuman priority journal Animals Cell Line Cycloheximide Drug Resistance Eflornithine Fibroblasts Humans Mice Ornithine Decarboxylase Putrescine Spermidine |
description |
Treatment of the chemically transformed fibroblasts BP-A31 and other cell lines with low concentrations of cycloheximide (CHM) for 72 h followed by the removal of the protein synthesis inhibitor leads to the proliferation of α-difluoromethylornithine (DFMO)-resistant phenotypes. These drug-resistant cells contain almost no ornithine decarboxylase (ODC) activity and concomitantly very low levels of putrescine and spermidine. Southern blot analysis and measurements of ODC activity and intracellular polyamine levels showed that the described mechanism of inducing resistance to DFMO triggered by CHM does not involve ODC gene amplification, altered transport of the drug or reduced affinity of the enzyme for DFMO. © 1986. |
format |
JOUR |
author |
Medrano, E.E. Burrone, O.R. Ferrer, M.M. Cafferata, E.G.A. Algranati, I.D. |
author_facet |
Medrano, E.E. Burrone, O.R. Ferrer, M.M. Cafferata, E.G.A. Algranati, I.D. |
author_sort |
Medrano, E.E. |
title |
A novel mechanism of resistance to α-difluoromethylornithine induced by cycloheximide. Growth with abnormally low levels of putrescine and spermidine |
title_short |
A novel mechanism of resistance to α-difluoromethylornithine induced by cycloheximide. Growth with abnormally low levels of putrescine and spermidine |
title_full |
A novel mechanism of resistance to α-difluoromethylornithine induced by cycloheximide. Growth with abnormally low levels of putrescine and spermidine |
title_fullStr |
A novel mechanism of resistance to α-difluoromethylornithine induced by cycloheximide. Growth with abnormally low levels of putrescine and spermidine |
title_full_unstemmed |
A novel mechanism of resistance to α-difluoromethylornithine induced by cycloheximide. Growth with abnormally low levels of putrescine and spermidine |
title_sort |
novel mechanism of resistance to α-difluoromethylornithine induced by cycloheximide. growth with abnormally low levels of putrescine and spermidine |
url |
http://hdl.handle.net/20.500.12110/paper_00145793_v206_n1_p106_Medrano |
work_keys_str_mv |
AT medranoee anovelmechanismofresistancetoadifluoromethylornithineinducedbycycloheximidegrowthwithabnormallylowlevelsofputrescineandspermidine AT burroneor anovelmechanismofresistancetoadifluoromethylornithineinducedbycycloheximidegrowthwithabnormallylowlevelsofputrescineandspermidine AT ferrermm anovelmechanismofresistancetoadifluoromethylornithineinducedbycycloheximidegrowthwithabnormallylowlevelsofputrescineandspermidine AT cafferataega anovelmechanismofresistancetoadifluoromethylornithineinducedbycycloheximidegrowthwithabnormallylowlevelsofputrescineandspermidine AT algranatiid anovelmechanismofresistancetoadifluoromethylornithineinducedbycycloheximidegrowthwithabnormallylowlevelsofputrescineandspermidine AT medranoee novelmechanismofresistancetoadifluoromethylornithineinducedbycycloheximidegrowthwithabnormallylowlevelsofputrescineandspermidine AT burroneor novelmechanismofresistancetoadifluoromethylornithineinducedbycycloheximidegrowthwithabnormallylowlevelsofputrescineandspermidine AT ferrermm novelmechanismofresistancetoadifluoromethylornithineinducedbycycloheximidegrowthwithabnormallylowlevelsofputrescineandspermidine AT cafferataega novelmechanismofresistancetoadifluoromethylornithineinducedbycycloheximidegrowthwithabnormallylowlevelsofputrescineandspermidine AT algranatiid novelmechanismofresistancetoadifluoromethylornithineinducedbycycloheximidegrowthwithabnormallylowlevelsofputrescineandspermidine |
_version_ |
1782026831535276032 |