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Título: | Leishmania infantum: polyamine biosynthesis and levels during the growth of promastigotes. |
Autor: | Balaña-Fouce, Rafael; Escribano, M. Isabel CSIC ORCID ; Alunda Rodríguez, Jose María | Fecha de publicación: | 1991 | Editor: | Elsevier | Citación: | International Journal of Biochemistry 23: 1213- 1217 (1991) | Resumen: | Decarboxylation of polyamine precursors: L-ornithine and L-methionine was determined along the growth curve of Leishmania infantum promastigotes in vivo, reaching maximum values on day 2 post-inoculum (mid-logarithmic phase). 2. Maximum values of L-ornithine and L-methionine decarboxylation were: 1.97 +/- 0.28 nmol CO2/hr/10(7) promastigotes and 3.18 +/- 0.34 nmol CO2/hr/10(7) promastigotes, respectively. 3. Total (free + conjugated) polyamine content was closely related with the proliferative stage of Leishmania infantum promastigotes. 4. D,L-alpha-difluoromethylornithine (DFMO) and Berenil depleted putrescine levels in a concentration-dependent manner. 5. Total and free putrescine/spermidine ratio varied significantly with the proliferative stage. Minimum values were found in late logarithmic phase (day 3 post-inoculum). 6. Small but detectable amounts of free spermine were detectable along the growth curve of Leishmania infantum promastigotes. | URI: | http://hdl.handle.net/10261/93743 | DOI: | 10.1016/0020-711X (91) 90218-C | Identificadores: | doi: 10.1016/0020-711X (91) 90218-C issn: 0020-711X |
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