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Abstract:

The protective role of melanin, either synthetic or derived from a metastatic lung melanoma nodule, was studied in terms of its ability to interact with active oxygen species (O2, H2O2, RO, ROO, etc.). Both melanins showed the ability to react with O2. The superoxide dismutase‐like activity corresponds to 21 and 10 U/mg for synthetic and tumor melanin, respectively. The latter value accounts for about 8% of the superoxide dismutase activity of cultured melanoma cells. Neither type of melanin showed catalase‐like or glutathione peroxidase‐like activity. Both types of melanin reacted with RO and ROO radicals as determined by inhibition of the lipid peroxidation reaction of rat liver homogenates. The spontaneous lipid peroxidation of rat liver homogenate was inhibited up to 90% and 80% by synthetic and tumor melanin with half‐maximal effects at 2.5 and 5.5 μg melanin/ml, respectively. The 2,2‐azobis‐(2 amidino propane) (AAPH)‐initiated lipid peroxidation of rat liver homogenate was inhibited up to 3% and 20% by synthetic and tumor melanin, with half maximal effect at 120 and 500 μg melanin/ml, respectively. Both types of melanin were able to protect the in vitro inactivation of glucose oxidase, which occurs in the presence of AAPH‐generated radicals. Copyright © 1993, Wiley Blackwell. All rights reserved

Registro:

Documento: Artículo
Título:Role of Melanin as a Scavenger of Active Oxygen Species
Autor:BUSTAMANTE, J.; BREDESTON, L.; MALANGA, G.; MORDOH, J.
Filiación:Instituto de Quimica y Fisicoquimica Biologica, Facultad de Farmacia y Bioquimica, Buenos Aires, 1113, Argentina
Instituto de Investigaciones Bioquimicas "Fundacion Compomar, Facultad de Ciencias Exactas y Naturales, Buenos Aires, 1405, Argentina
Palabras clave:Free Radical; Lipid peroxidation; Melanin; Scavenger; 2,2' azobis(2 amidinopropane); 2,2'-azobis(2-amidinopropane); amidine; glucose oxidase; melanin; reactive oxygen metabolite; scavenger; superoxide dismutase; animal; article; cell culture; chemistry; human; lipid peroxidation; melanoma; metabolism; pathology; physiology; Amidines; Animal; Free Radical Scavengers; Glucose Oxidase; Human; Lipid Peroxidation; Melanins; Melanoma; Reactive Oxygen Species; Superoxide Dismutase; Support, Non-U.S. Gov't; Tumor Cells, Cultured
Año:1993
Volumen:6
Número:5
Página de inicio:348
Página de fin:353
DOI: http://dx.doi.org/10.1111/j.1600-0749.1993.tb00612.x
Título revista:Pigment Cell Research
Título revista abreviado:Pigm. Cell Res.
ISSN:08935785
CAS:2,2' azobis(2 amidinopropane), 13217-66-8; glucose oxidase, 9001-37-0; melanin, 8049-97-6; superoxide dismutase, 37294-21-6, 9016-01-7, 9054-89-1; 2,2'-azobis(2-amidinopropane), 13217-66-8; Amidines; Free Radical Scavengers; Glucose Oxidase, EC 1.1.3.4; Melanins; Reactive Oxygen Species; Superoxide Dismutase, EC 1.15.1.1
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08935785_v6_n5_p348_BUSTAMANTE

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Citas:

---------- APA ----------
BUSTAMANTE, J., BREDESTON, L., MALANGA, G. & MORDOH, J. (1993) . Role of Melanin as a Scavenger of Active Oxygen Species. Pigment Cell Research, 6(5), 348-353.
http://dx.doi.org/10.1111/j.1600-0749.1993.tb00612.x
---------- CHICAGO ----------
BUSTAMANTE, J., BREDESTON, L., MALANGA, G., MORDOH, J. "Role of Melanin as a Scavenger of Active Oxygen Species" . Pigment Cell Research 6, no. 5 (1993) : 348-353.
http://dx.doi.org/10.1111/j.1600-0749.1993.tb00612.x
---------- MLA ----------
BUSTAMANTE, J., BREDESTON, L., MALANGA, G., MORDOH, J. "Role of Melanin as a Scavenger of Active Oxygen Species" . Pigment Cell Research, vol. 6, no. 5, 1993, pp. 348-353.
http://dx.doi.org/10.1111/j.1600-0749.1993.tb00612.x
---------- VANCOUVER ----------
BUSTAMANTE, J., BREDESTON, L., MALANGA, G., MORDOH, J. Role of Melanin as a Scavenger of Active Oxygen Species. Pigm. Cell Res. 1993;6(5):348-353.
http://dx.doi.org/10.1111/j.1600-0749.1993.tb00612.x