alexa Lability of red blood cell membranes to lipid peroxidation: application to humans fed polyunsaturated lipids.
Chemistry

Chemistry

Medicinal Chemistry

Author(s): Fraga CG, Tappel AL, Leibovitz BE, Kuypers F, Chiu D,

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Abstract Red blood cell membranes (RBCM) were used to estimate human red blood cell lability to lipid peroxidation in vitro. RBCM were prepared from blood collected from humans fed diets with either 3 or 15\% polyunsaturated fatty acids for 80 days. RBCM were isolated by centrifugation, and oxidative stress was induced by in vitro incubation with 0.1 or 0.5 mM tert-butyl hydroperoxide (t-BOOH) in the presence of 0.5 mg added hemoglobin. Lipid Peroxidation was evaluated by measurement of thiobarbituric acid-reactive substances (TBARS). Lipid peroxidation correlated with the protein content of RBCM in both noninduced and t-BOOH-induced lipid peroxidation systems. TBARS production was dependent on the amount of t-BOOH added to the RBCM. The production of TBARS by RBCM incubated with 0.5 mM t-BOOH was correlated with arachidonic acid content in the red blood cells (RBC) from which RBCM were prepared. The methodology developed was useful for comparative estimations of the lability of RBCM to lipid peroxidation.
This article was published in Lipids and referenced in Medicinal Chemistry

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