Porphyrin bioasynthesis in human breast cancer. Preliminary mimetic in vitro studies
Considering both the wide spread utilization of porphyrins as photodiagnostic and phototherapeutic agents for tumours, and the limited information about the heme biosynthetic pathway in neoplastic tissues, a study of porphyrin biosynthesis in human breast adenocarcinoma, determining first the optima...
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1988
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02698951_v16_n2_p61_Navone http://hdl.handle.net/20.500.12110/paper_02698951_v16_n2_p61_Navone |
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paper:paper_02698951_v16_n2_p61_Navone2023-06-08T15:24:33Z Porphyrin bioasynthesis in human breast cancer. Preliminary mimetic in vitro studies aminolevulinic acid porphyrin breast cancer controlled study drug therapy human human cell in vitro study organ culture priority journal Considering both the wide spread utilization of porphyrins as photodiagnostic and phototherapeutic agents for tumours, and the limited information about the heme biosynthetic pathway in neoplastic tissues, a study of porphyrin biosynthesis in human breast adenocarcinoma, determining first the optimal working conditions, was initiated. The effect of temperature, maintenance time and the amount of precursor (δ-aminolevulinic acid, ALA) added and uptaken by normal and neoplastic tissue on the formation of porphyrins was determined. The optimal initial ALA concentration was approximately 34 μg/ml, while optimal temperature and maintenance time were 37°C and 24 h respectively. Under these conditions, porphyrin biosynthesis in tumoral tissue was about five times higher than normal. The functionality of the heme enzymes was indirectly measured by means of porphyrin chromatographic separation. Starting with ALA as substrate it was shown that the heme biosynthetic pathway was functional in the neoplastic tissue, up to the formation of protoporphyrinogen. 1988 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02698951_v16_n2_p61_Navone http://hdl.handle.net/20.500.12110/paper_02698951_v16_n2_p61_Navone |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
aminolevulinic acid porphyrin breast cancer controlled study drug therapy human human cell in vitro study organ culture priority journal |
| spellingShingle |
aminolevulinic acid porphyrin breast cancer controlled study drug therapy human human cell in vitro study organ culture priority journal Porphyrin bioasynthesis in human breast cancer. Preliminary mimetic in vitro studies |
| topic_facet |
aminolevulinic acid porphyrin breast cancer controlled study drug therapy human human cell in vitro study organ culture priority journal |
| description |
Considering both the wide spread utilization of porphyrins as photodiagnostic and phototherapeutic agents for tumours, and the limited information about the heme biosynthetic pathway in neoplastic tissues, a study of porphyrin biosynthesis in human breast adenocarcinoma, determining first the optimal working conditions, was initiated. The effect of temperature, maintenance time and the amount of precursor (δ-aminolevulinic acid, ALA) added and uptaken by normal and neoplastic tissue on the formation of porphyrins was determined. The optimal initial ALA concentration was approximately 34 μg/ml, while optimal temperature and maintenance time were 37°C and 24 h respectively. Under these conditions, porphyrin biosynthesis in tumoral tissue was about five times higher than normal. The functionality of the heme enzymes was indirectly measured by means of porphyrin chromatographic separation. Starting with ALA as substrate it was shown that the heme biosynthetic pathway was functional in the neoplastic tissue, up to the formation of protoporphyrinogen. |
| title |
Porphyrin bioasynthesis in human breast cancer. Preliminary mimetic in vitro studies |
| title_short |
Porphyrin bioasynthesis in human breast cancer. Preliminary mimetic in vitro studies |
| title_full |
Porphyrin bioasynthesis in human breast cancer. Preliminary mimetic in vitro studies |
| title_fullStr |
Porphyrin bioasynthesis in human breast cancer. Preliminary mimetic in vitro studies |
| title_full_unstemmed |
Porphyrin bioasynthesis in human breast cancer. Preliminary mimetic in vitro studies |
| title_sort |
porphyrin bioasynthesis in human breast cancer. preliminary mimetic in vitro studies |
| publishDate |
1988 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02698951_v16_n2_p61_Navone http://hdl.handle.net/20.500.12110/paper_02698951_v16_n2_p61_Navone |
| _version_ |
1768544407901962240 |