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- W2106707673 abstract "Sialic acids are substituted neuraminic acid derivatives which are typically found at the outermost end of glycan chains on the membrane in all cell types. The role of erythrocyte membrane sialic acids during aging has been established however the relationship between sialic acid and oxidative stress is not fully understood. The present work was undertaken to analyze the relationship between erythrocyte membrane sialic acid with its plasma level, membrane and plasma lipid hydroperoxide levels and plasma total antioxidant capacity. Results show that sialic acid content decreases significantly (P< 0.001) in RBC membrane (r= -0.901) and increases in plasma (r=0.860) as a function of age in humans. Lipid peroxidation measured in the form of hydroperoxides increases significantly (P<0.001) in plasma (r=0.830) and RBC membranes (r=0.875) with age in humans. The Trolox Equivalent Total Antioxidant Capacity (TETAC) of plasma was found to be significantly decreased (P< 0.001, r=-0.844). We observe significant correlations between decrease of erythrocyte membrane sialic acid and plasma lipid hydroperoxide and TETAC. Based on the observed correlations, we hypothesize that increase in oxidative stress during aging may influence the sialic acid decomposition from membrane thereby altering the membrane configuration affecting many enzymatic and transporter activities. Considering the importance of plasma sialic acid as a diagnostic parameter, it is important to establish age-dependent reference." @default.
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- W2106707673 date "2012-01-01" @default.
- W2106707673 modified "2023-10-02" @default.
- W2106707673 title "Erythrocyte sialic acid content during aging in humans: correlation with markers of oxidative stress." @default.
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- W2106707673 doi "https://doi.org/10.3233/dma-2011-0871" @default.
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