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    Indices of Paraoxonase and Oxidative Status Do Not Enhance the Prediction of Subclinical Cardiovascular Disease in Mixed-Ancestry South Africans

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    Author
    Macharia, M; Kengne, AP; Blackhurst, DM; Erasmus, RT; Hoffmann, M; Matsha, TE
    Date
    2014-01-01
    Source Title
    Oxidative Medicine and Cellular Longevity
    Publisher
    HINDAWI LTD
    University of Melbourne Author/s
    Macharia, David
    Affiliation
    Rural Clinical School
    Metadata
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    Document Type
    Journal Article
    Citations
    Macharia, M., Kengne, A. P., Blackhurst, D. M., Erasmus, R. T., Hoffmann, M. & Matsha, T. E. (2014). Indices of Paraoxonase and Oxidative Status Do Not Enhance the Prediction of Subclinical Cardiovascular Disease in Mixed-Ancestry South Africans. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY, 2014, https://doi.org/10.1155/2014/135650.
    Access Status
    Open Access
    URI
    http://hdl.handle.net/11343/257610
    DOI
    10.1155/2014/135650
    Abstract
    We evaluated the association of indices of paraoxonase (PON1) and oxidative status with subclinical cardiovascular disease (CVD) in mixed-ancestry South Africans. Participants were 491 adults (126 men) who were stratified by diabetes status and body mass index (BMI). Carotid intima-media thickness (CIMT) was used as a measure of subclinical CVD. Indices of PON1 and oxidative status were determined by measuring levels and activities (paraoxonase and arylesterase) of PON1, antioxidant activity (ferric reducing antioxidant power and trolox equivalent antioxidant capacity), and lipid peroxidation markers (malondialdehyde and oxidized LDL). Diabetic subjects (28.9%) displayed a significant decrease in PON1 status and antioxidant activity as well as increase in oxidized LDL and malondialdehyde. A similar profile was apparent across increasing BMI categories. CIMT was higher in diabetic than nondiabetic subjects (P < 0.0001) but showed no variation across BMI categories. Overall, CIMT correlated negatively with indices of antioxidant activity and positively with measures of lipid oxidation. Sex, age, BMI, and diabetes altogether explained 29.2% of CIMT, with no further improvement from adding PON1 and/or antioxidant status indices. Though indices of PON1 and oxidative status correlate with CIMT, their measurements may not be useful for identifying subjects at high CVD risk in this population.

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