Artículo
Abstract:
Putrescine uptake of Leishmania mexicana promastigotes is tightly regulated by polyamine intracellular concentrations. This uptake, markedly stimulated after parasite treatment with alpha-difluoromethylornithine (DFMO) for 48 to 72 hrs., was strongly repressed by exposure of Leishmania cultures to exogenous putrescine or its derivative 1,4-dimethylputrescine. In contrast, spermidine, spermine, diaminopropane and cadaverine were unable to decrease putrescine transport. Both, the uptake induction as well as its specific feedback repression by increased levels of endogenous putrescine requires protein synthesis since they were abolished after addition of cycloheximide for several hours. Our results seem to indicate that putrescine transporter is a stable and specific protein which can be reversibly inactivated by a relatively unstable repressor.
Registro:
| Documento: | Artículo |
| Título: | Regulation of putrescine uptake in Leishmania mexicana promastigotes. |
| Autor: | Gonzalez, N.S.; Algranati, I.D. |
| Filiación: | Instituto de Investigaciones Bioquímicas Fundación Campomar, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Argentina |
| Palabras clave: | cycloheximide; eflornithine; polyamine; putrescine; active transport; animal; article; drug effect; feedback system; growth, development and aging; kinetics; Leishmania mexicana; metabolism; Animals; Biological Transport, Active; Cycloheximide; Eflornithine; Feedback; Kinetics; Leishmania mexicana; Polyamines; Putrescine |
| Año: | 1994 |
| Volumen: | 40 |
| Número: | 7 |
| Página de inicio: | 907 |
| Página de fin: | 914 |
| Título revista: | Cellular and molecular biology (Noisy-le-Grand, France) |
| Título revista abreviado: | Cell. Mol. Biol. (Noisy-le-grand) |
| ISSN: | 01455680 |
| CAS: | cycloheximide, 642-81-9, 66-81-9; eflornithine, 67037-37-0, 70052-12-9; putrescine, 110-60-1, 333-93-7; Cycloheximide, 66-81-9; Eflornithine, 70052-12-9, 110-60-1; Polyamines; Putrescine, 110-60-1 |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01455680_v40_n7_p907_Gonzalez |
Citas:
---------- APA ----------
Gonzalez, N.S. & Algranati, I.D. (1994) . Regulation of putrescine uptake in Leishmania mexicana promastigotes. Cellular and molecular biology (Noisy-le-Grand, France), 40(7), 907-914.Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01455680_v40_n7_p907_Gonzalez [ ]
---------- CHICAGO ----------
Gonzalez, N.S., Algranati, I.D. "Regulation of putrescine uptake in Leishmania mexicana promastigotes." Cellular and molecular biology (Noisy-le-Grand, France) 40, no. 7 (1994) : 907-914.Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01455680_v40_n7_p907_Gonzalez [ ]
---------- MLA ----------
Gonzalez, N.S., Algranati, I.D. "Regulation of putrescine uptake in Leishmania mexicana promastigotes." Cellular and molecular biology (Noisy-le-Grand, France), vol. 40, no. 7, 1994, pp. 907-914.Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01455680_v40_n7_p907_Gonzalez [ ]
---------- VANCOUVER ----------
Gonzalez, N.S., Algranati, I.D. Regulation of putrescine uptake in Leishmania mexicana promastigotes. Cell. Mol. Biol. (Noisy-le-grand). 1994;40(7):907-914.Available from: https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01455680_v40_n7_p907_Gonzalez [ ]
