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  • Title: Predictors of plasma lipoprotein(a) concentration in the West of Scotland Coronary Prevention Study cohort.
    Author: Gaw A, Docherty G, Brown EA, Ford I.
    Journal: Atherosclerosis; 1999 Apr; 143(2):445-50. PubMed ID: 10217375.
    Abstract:
    An elevated plasma lipoprotein(a) (Lp(a)) concentration is an independent risk factor for coronary heart disease (CHD). Plasma Lp(a) levels are believed to be predominantly controlled by the APO(a) gene, which encodes the apo(a) glycoprotein moiety of the Lp(a) particle. However, other parameters in the lipoprotein profile as well as co-existing disease states or personal traits have been proposed as co-varieties. In order to examine these potential controlling factors in greater detail than previously possible, 1760 unrelated Caucasian subjects were studied, from which were identified 907 with a single expressing APO(a) allele. This strategy was followed to obviate the difficulty in dealing with the co-expression of different apo(a) isoforms and the resulting compound plasma Lp(a) level. After cube-root transformation of the plasma Lp(a) levels to normalise their distribution, a series of correlates were computed. There was no good correlation between Lp(a) concentration and any other measured lipid or lipoprotein in the lipid profile or with any other variable examined, with the important exception of the length of the expressed apo(a) isoform (r = -0.491, P = 0.0001). We conclude that in this population the plasma Lp(a) concentration is not predicted by the plasma lipid profile, alcohol intake, or smoking status but is predicted, albeit incompletely, by the length polymorphism of the APO(a) gene.
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