info:eu-repo/semantics/article
Monoamine and Iron-related Toxicity : From Serotonin-binding Proteins to Lipid Peroxidation and Apoptosis in PC12 Cells
Registro en:
0306-3623
10.1016/S0306-3623(97)00440-0
Autor
Vélez Pardo, Carlos Alberto
Jiménez del Rio, Marlene
Ebinger, Guy
Vauquelin, Georges
Institución
Resumen
ABSTRACT: 1. Monoamines do not form coordination bonds with a preformed iron–serotonin-binding protein (SBP) complex, as initially believed. Instead, metals oxidize the monoamines either directly (manganese, copper) or by oxygen free radical formation (iron), the oxidation products bind covalently to SBP and the
conjugates are able to undergo redox cycling. These interactions are denoted as a “molecular oxidative mechanism.” 2. Dopamine in combination with iron induces lipid peroxidation and apoptosis in PC12 cells by a stress oxidative-Ca2+ independent mechanism. 3. Dopamine–iron cytotoxicity may have relevance to an understanding of the mechanism by which dopaminergic neurons are eroded in some neurodegenerative disorders. COL0010744