Abstract:
Photodynamic therapy using 5-aminolevulinic acid (ALA)-induced protoporphyrin IX is a recent approach to detect and treat some malignancies. The use of lipophilic derivatives of ALA has been exploited in the last years to enhance ALA penetration. In this paper, we describe the application of the Mauzerall and Granick's method [J. Biol. Chem. 219 (1956) 435] to the quantification of ALA derivatives. We also describe the employment of reusable ion-exchange chromatographic columns for separating mixtures of ALA and ALA derivatives present in biological samples. The relation between 555 nm absorbance and ALA or ALA derivative concentration was linear up to 100 nmol/ml and the limit of detection of ALA and ALA derivatives was 1 nmol per ml. We employed a Dowex 50 X8 hydrogen form resin to separate ALA from the derivatives. Whereas 90 ± 4% of the total ALA was eluted using sodium acetate, only 3-9% of the ALA derivatives was recovered. Only upon exposure of the resin to a high HCl concentration, the ALA derivatives were completely released. We employed this new method for the separation of ALA from ALA derivatives in cells exposed to different ALA compounds. © 2004 Elsevier B.V. All rights reserved.
Registro:
Documento: |
Artículo
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Título: | A method for separating ALA from ALA derivatives using ionic exchange extraction |
Autor: | Di Venosa, G.; Fukuda, H.; Perotti, C.; Batlle, A.; Casas, A. |
Filiación: | CIPYP, CONICET and FCEN, University of Buenos Aires, Ciudad Universitaria Pabellon II, 1428 Capital Federal, Argentina Viamonte 1881 10A, 1056 Buenos Aires, Argentina
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Palabras clave: | ALA; ALA derivatives; ALA esters; Aminolevulinic acid; Dowex resin; PDT; Photodynamic therapy; acetic acid; amino acid derivative; aminolevulinic acid; hydrochloric acid; hydrogen; resin; animal cell; article; concentration (parameters); controlled study; elution; extraction; ion exchange; light absorption; nonhuman; priority journal; product recovery; separation technique; Aminolevulinic Acid; Animals; Chromatography, Ion Exchange; Mice; Tumor Cells, Cultured |
Año: | 2004
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Volumen: | 75
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Número: | 3
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Página de inicio: | 157
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Página de fin: | 163
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DOI: |
http://dx.doi.org/10.1016/j.jphotobiol.2004.07.001 |
Título revista: | Journal of Photochemistry and Photobiology B: Biology
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Título revista abreviado: | J. Photochem. Photobiol. B Biol.
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ISSN: | 10111344
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CODEN: | JPPBE
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CAS: | acetic acid, 127-08-2, 127-09-3, 64-19-7, 71-50-1; aminolevulinic acid, 106-60-5; hydrochloric acid, 7647-01-0; hydrogen, 12385-13-6, 1333-74-0; Aminolevulinic Acid, 106-60-5
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Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10111344_v75_n3_p157_DiVenosa |
Referencias:
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Citas:
---------- APA ----------
Di Venosa, G., Fukuda, H., Perotti, C., Batlle, A. & Casas, A.
(2004)
. A method for separating ALA from ALA derivatives using ionic exchange extraction. Journal of Photochemistry and Photobiology B: Biology, 75(3), 157-163.
http://dx.doi.org/10.1016/j.jphotobiol.2004.07.001---------- CHICAGO ----------
Di Venosa, G., Fukuda, H., Perotti, C., Batlle, A., Casas, A.
"A method for separating ALA from ALA derivatives using ionic exchange extraction"
. Journal of Photochemistry and Photobiology B: Biology 75, no. 3
(2004) : 157-163.
http://dx.doi.org/10.1016/j.jphotobiol.2004.07.001---------- MLA ----------
Di Venosa, G., Fukuda, H., Perotti, C., Batlle, A., Casas, A.
"A method for separating ALA from ALA derivatives using ionic exchange extraction"
. Journal of Photochemistry and Photobiology B: Biology, vol. 75, no. 3, 2004, pp. 157-163.
http://dx.doi.org/10.1016/j.jphotobiol.2004.07.001---------- VANCOUVER ----------
Di Venosa, G., Fukuda, H., Perotti, C., Batlle, A., Casas, A. A method for separating ALA from ALA derivatives using ionic exchange extraction. J. Photochem. Photobiol. B Biol. 2004;75(3):157-163.
http://dx.doi.org/10.1016/j.jphotobiol.2004.07.001