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  • Title: Circulating Levels of Proprotein Convertase Subtilisin/Kexin Type 9 and Arterial Stiffness in a Large Population Sample: Data From the Brisighella Heart Study.
    Author: Ruscica M, Ferri N, Fogacci F, Rosticci M, Botta M, Marchiano S, Magni P, D'Addato S, Giovannini M, Borghi C, Cicero AFG, Brisighella Heart Study Group.
    Journal: J Am Heart Assoc; 2017 May 03; 6(5):. PubMed ID: 28468788.
    Abstract:
    BACKGROUND: Proprotein convertase subtilisin/kexin type 9 (PCSK9) circulating levels are significantly associated with an increased risk of cardiovascular events. This study aimed to evaluate the relationship between circulating levels of PCSK9 and arterial stiffness, an early instrumental biomarker of cardiovascular disease risk, in a large sample of overall healthy participants. METHODS AND RESULTS: From the historical cohort of the Brisighella Heart Study, after exclusion of active smokers, participants in secondary prevention for cardiovascular disease, and patients in treatment with statins or vasodilating agents, we selected 227 premenopausal women and 193 age-matched men and 460 postmenopausal women and 416 age-matched men. In these participants, we evaluated the correlation between PCSK9 plasma circulating levels and pulse wave velocity. Postmenopausal women showed higher PCSK9 levels (309.9±84.1 ng/mL) compared with the other groups (P<0.001). Older men had significant higher levels than younger men (283.2±75.6 versus 260.9±80.4 ng/mL; P=0.008). In the whole sample, pulse wave velocity was predicted mainly by age (B=0.116, 95% CI 0.96-0.127, P<0.001), PCSK9 (B=0.014, 95% CI 0.011-0.016, P<0.001), and serum uric acid (B=0.313, 95% CI 0.024-0.391, P=0.026). Physical activity, low-density lipoprotein cholesterol, high-density lipoprotein cholesterol, and estimated glomerular filtration rate were not associated with pulse wave velocity (P>0.05).By considering the subgroups described, age and PCSK9 levels were mainly associated with pulse wave velocity, which also correlated with serum uric acid in postmenopausal women. CONCLUSIONS: In the Brisighella Heart Study cohort, circulating PCSK9 is significantly related to arterial stiffness, independent of sex and menopausal status in women.
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