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LDL size and susceptibility to oxidation in experimental nephrosis

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Abstract

The aim of this study was to investigate the relationship between endothelial dysfunction and low density lipoprotein (LDL) size and susceptibility to oxidation in nephrotic rats with or without deficiency of vitamin E and selenium. Four groups of male Wistar rats were studied: control (C), vitamin E and selenium deficient control (DefC), nephrotic (NS), and vitamin E and selenium deficient NS (DefNS). Nephrotic syndrome was induced by puromycin aminonucleoside. The molar ratio of vitamin E/LDL-cholesterol was significantly lower in DefNS, DefC rats, and NS vs. C rats. In comparison with control animals, vasodilation and LDL oxidability were significantly lower in nephrotic animals. LDL size was similar in all groups. Abnormal endothelial function in response to acetylcholine and carbachol was observed in NS animals compared to control rats. Relaxation response was inversely associated with an increase in LDL susceptibility to oxidation and with a lower molar ratio of vitamin E/LDL-c. LDL oxidability and LDL-c were the only variables independently associated with vasodilation. These results suggest that endothelial dysfunction of NS may be a consequence of the increased LDL susceptibility to oxidation, secondary to antioxidant deficiency.

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Authors and Affiliations

  1. Departamento de Endocrinología del, Instituto Nacional de Cardiología ‘Ignacio Chávez’, Juan Badiano No. 1, 14080, México, D.F, México E-mail

    Carlos Posadas-Romero, Rosalinda Posadas-Sánchez, José Zamora-González & Antonio Hernández-Ono

  2. Departamento de Bioquímica del, Instituto Nacional de Cardiología ‘Ignacio Chávez’, Juan Badiano No. 1, 14080, México, D.F, México

    Guadalupe Baños-Marhaber, Omar N. Medina Campos & José Pedraza-Chaverrí

Authors
  1. Carlos Posadas-Romero
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  2. Rosalinda Posadas-Sánchez
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  3. José Zamora-González
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  4. Antonio Hernández-Ono
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  5. Guadalupe Baños-Marhaber
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  6. Omar N. Medina Campos
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  7. José Pedraza-Chaverrí
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Correspondence to Carlos Posadas-Romero.

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Posadas-Romero, C., Posadas-Sánchez, R., Zamora-González, J. et al. LDL size and susceptibility to oxidation in experimental nephrosis. Mol Cell Biochem 220, 61–68 (2001). https://doi.org/10.1023/A:1010874306937

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