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Updated: Jun 14, 2026
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Published on: October 12, 2017
Cu and Fe metallic ions-mediated oxidation of low-density lipoproteins studied by NMR, TEM and Z-scan technique
S L Gómez1, A M Monteiro, S R Rabbani
1Departamento de Física, Universidade Estadual de Ponta Grossa, CEP 84030-900, Post-box 66318, Av. Carlos Cavalcanti, 4748, Bloco L, Uvaranas, Ponta Grossa, PR, Brazil.
Abstract:
In this work we report on a study of the morphological changes of LDL induced in vitro by metallic ions (Cu(2+) and Fe(3+)). These modifications were characterized by transmission electron microscopy, nuclear magnetic resonance and the Z-scan technique. The degree of oxidative modification of LDL was determined by the TBARS and lipid hydroperoxides assays. It is shown that distinct pathways for modifying lipoproteins lead to different morphological transformations of the particles characterized by changes in size and/or shape of the resulting particles, and by the tendency to induce aggregation of the particles. There were no evidence of melting of particles promoted by oxidative processes with Cu and Fe.
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