Association between C-reactive protein genotype, circulating levels, and aortic pulse wave velocity

Wiebke Schumacher, John Cockcroft, Nicholas J. Timpson, Carmel M. McEniery, John Gallacher, Ann Rumley, Gordon Lowe, George Davey Smith, Ian B. Wilkinson, Yoav Ben-Shlomo*

*Corresponding author for this work

    Research output: Contribution to journalArticle

    57 Citations (Scopus)

    Abstract

    Circulating C-reactive protein (CRP) level is associated with cardiovascular disease. Whether this relationship is causal has been subject of debate, especially as a potential therapeutic target. Previous studies have demonstrated an association between circulating CRP levels and arterial pulse wave velocity, an accepted measure of arterial stiffness. We investigated the association between circulating CRP levels, CRP genotype, and aortic pulse wave velocity by examining data on 790 healthy male participants of the Caerphilly study. Circulating CRP levels were associated with aortic pulse wave velocity after adjustment for cardiovascular risk factors and other potential confounders (P=0.001). Three single nucleotide polymorphisms in the CRP gene (rs 1130864, rs 1800947, and rsl205) were associated with differences in circulating CRP levels (ratio of geometric means: 1.12, 95% CI 1.03 to 1.21, P=0.005; 0.76, 95% CI 0.66 to 0.87, P<0.001; 0.88, 95% CI 0.81 to 0.95, P=0.001, respectively). However, there was no relationship between any of the genotypes and aortic pulse wave velocity (regression coefficient for C:G/G:G versus C:C genotypes for single nucleotide polymorphism rsl800947 β=0.005; 95% CI, -0.57 to 0.58; P=0.99). These results suggest that although circulating CRP levels are associated with aortic pulse wave velocity, CRP does not have a causal role in the development of arterial stiffness. CRP may simply act as a marker of vascular damage (ie, reverse causality), or the association reflects residual confounding. Further studies are needed to confirm these findings, particularly in view of the central role CRP has played in cardiovascular disease so far.

    Original languageEnglish
    Pages (from-to)150-157
    Number of pages8
    JournalHypertension
    Volume53
    Issue number2
    DOIs
    Publication statusPublished - Feb 2009

    Keywords

    • Atherosclerosis
    • C-reactive protein
    • Genotype
    • Risk factors
    • Vascular resistance

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