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Abstract:

The aim of this work was to test in vitro and in vivo the efficacy of the derivatives of 5-aminolevulinic acid (ALA): hexyl-ALA (He-ALA), undecanoyl-ALA and R,S-2-(hydroximethyl)tetrahydropyranyl-ALA (THP-ALA) as pro-photosensitising agents. The compounds were assayed in a cell line derived from a murine mammary tumour, in tumour explants and after injection of the cells into mice. In vitro, undecanoyl-ALA and THP-ALA did not improve ALA efficacy in terms of porphyrin synthesis. On the other hand, half of the amount of ALA is required to obtain the same plateau amount of photosensitiser from He-ALA. However, this plateau value cannot be surpassed in spite of the four-times higher accumulation of ALA/He-ALA from the ALA derivative. This shows that He-ALA conversion to porphyrins but not He-ALA entry to the cells is limiting. Employing ionic exchange chromatography, we found that 80% of total uptake was He-ALA whereas only 20% was ALA. This suggests that the esterases, probably themselves regulated by the heme pathway, are limiting the conversion of ALA derivatives into porphyrins. A similar situation occurs with THP-ALA. Tumour explant porphyrin results correlate well with cell line data. However, i.p. injection of ALA derivatives to mice resulted in a lower porphyrin concentration in the tumour when compared to the administration of equimolar amounts of ALA, indicating that there should be retention of ALA derivatives either within the blood vessels in the initial phase of distribution and/or within the capillaries of the tumour. © 2004 Cancer Research UK.

Registro:

Documento: Artículo
Título:Porphyrin synthesis from ALA derivatives for photodynamic therapy. In vitro and in vivo studies
Autor:Perotti, C.; Fukuda, H.; DiVenosa, G.; MacRobert, A.J.; Batlle, A.; Casas, A.
Filiación:Ctro. Invest. Porfirinas P., Ciudad Universitaria, Pabellón II, (1428) Capital Federal, Argentina
National Medical Laser Centre, Roy. Free and Univ. Coll. Med. Sch., London, United Kingdom
Viamonte 1881 10A, Buenos Aires 1056, Argentina
Palabras clave:ALA; ALA derivatives; Aminolevulinic acid; PDT; Photodynamic therapy; 2 (hydroxymethyl)tetrahydropyranyl 5 aminolevulinic acid; aminolevulinic acid; hexyl 5 aminolevulinic acid; photosensitizing agent; porphyrin; unclassified drug; undecanoyl 5 aminolevulinic acid; aminolevulinic acid; drug derivative; photosensitizing agent; porphyrin; animal cell; animal experiment; animal model; animal tissue; article; bioaccumulation; breast tumor; cell line; controlled study; correlation analysis; drug determination; drug efficacy; drug uptake; explant; ion exchange chromatography; male; mouse; nonhuman; photodynamic therapy; phototoxicity; porphyrin metabolism; priority journal; animal; Bagg albino mouse; biosynthesis; chemistry; experimental neoplasm; methodology; photochemotherapy; Aminolevulinic Acid; Animals; Male; Mammary Neoplasms, Animal; Mice; Mice, Inbred BALB C; Photochemotherapy; Photosensitizing Agents; Porphyrins
Año:2004
Volumen:90
Número:8
Página de inicio:1660
Página de fin:1665
DOI: http://dx.doi.org/10.1038/sj.bjc.6601722
Título revista:British Journal of Cancer
Título revista abreviado:Br. J. Cancer
ISSN:00070920
CODEN:BJCAA
CAS:aminolevulinic acid, 106-60-5; porphyrin, 24869-67-8; Aminolevulinic Acid, 106-60-5; Photosensitizing Agents; Porphyrins
PDF:https://bibliotecadigital.exactas.uba.ar/download/paper/paper_00070920_v90_n8_p1660_Perotti.pdf
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00070920_v90_n8_p1660_Perotti

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Citas:

---------- APA ----------
Perotti, C., Fukuda, H., DiVenosa, G., MacRobert, A.J., Batlle, A. & Casas, A. (2004) . Porphyrin synthesis from ALA derivatives for photodynamic therapy. In vitro and in vivo studies. British Journal of Cancer, 90(8), 1660-1665.
http://dx.doi.org/10.1038/sj.bjc.6601722
---------- CHICAGO ----------
Perotti, C., Fukuda, H., DiVenosa, G., MacRobert, A.J., Batlle, A., Casas, A. "Porphyrin synthesis from ALA derivatives for photodynamic therapy. In vitro and in vivo studies" . British Journal of Cancer 90, no. 8 (2004) : 1660-1665.
http://dx.doi.org/10.1038/sj.bjc.6601722
---------- MLA ----------
Perotti, C., Fukuda, H., DiVenosa, G., MacRobert, A.J., Batlle, A., Casas, A. "Porphyrin synthesis from ALA derivatives for photodynamic therapy. In vitro and in vivo studies" . British Journal of Cancer, vol. 90, no. 8, 2004, pp. 1660-1665.
http://dx.doi.org/10.1038/sj.bjc.6601722
---------- VANCOUVER ----------
Perotti, C., Fukuda, H., DiVenosa, G., MacRobert, A.J., Batlle, A., Casas, A. Porphyrin synthesis from ALA derivatives for photodynamic therapy. In vitro and in vivo studies. Br. J. Cancer. 2004;90(8):1660-1665.
http://dx.doi.org/10.1038/sj.bjc.6601722