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  • Title: Lipoprotein(a) is associated with a larger systemic burden of arterial calcification.
    Author: Singh SS, van der Toorn JE, Sijbrands EJG, de Rijke YB, Kavousi M, Bos D.
    Journal: Eur Heart J Cardiovasc Imaging; 2023 Jul 24; 24(8):1102-1109. PubMed ID: 37082982.
    Abstract:
    AIMS: Lipoprotein(a) [Lp(a)] is a genetically determined risk factor for cardiovascular disease. However, population-based evidence on the link between Lp(a) and subclinical arteriosclerosis is lacking. We assessed associations of Lp(a) concentrations with arteriosclerosis in multiple arteries. METHODS AND RESULTS: From the population-based Rotterdam study, 2354 participants (mean age: 69.5 years, 52.3% women) underwent non-contrast computed tomography to assess arterial calcification as a hallmark of arteriosclerosis. We quantified the volume of coronary artery calcification (CAC), aortic arch calcification (AAC), extracranial (ECAC), and intracranial carotid artery calcification (ICAC). All participants underwent blood sampling, from which plasma Lp(a) concentrations were derived. The association of plasma Lp(a) levels was assessed with calcification volumes and with severe calcification (upper quartile of calcification volume) using sex-stratified multivariable linear and logistic regression models. Higher Lp(a) levels were associated with larger ln-transformed volumes of CAC [fully adjusted beta 95% confidence interval (CI) per 1 standard deviation (SD) in women: 0.09, 95% CI 0.04-0.14, men: 0.09, 95% CI 0.03-0.14], AAC (women: 0.06, 95% CI 0.01-0.11, men: 0.09, 95% CI 0.03-0.14), ECAC (women: 0.07, 95% CI 0.02-0.13, men: 0.08, 95% CI 0.03-0.14), and ICAC (women: 0.09, 95% CI 0.03-0.14, men: 0.05, 95% CI -0.02 to 0.11]. In the highest Lp(a) percentile, severe ICAC was most prevalent in women [fully adjusted odds ratio (OR) 2.41, 95% CI 1.25-4.63] and severe AAC in men (fully adjusted OR 3.29, 95% CI 1.67-6.49). CONCLUSION: Higher Lp(a) was consistently associated with a larger calcification burden in all major arteries. The findings of this study indicate that Lp(a) is a systemic risk factor for arteriosclerosis and thus potentially an effective target for treatment. Lp(a)-reducing therapies may reduce the burden from arteriosclerotic events throughout the arterial system. TRANSLATIONAL PERSPECTIVE: In 2354 participants from the Rotterdam study, we assessed the link between Lp(a) concentrations and arterial calcifications, as proxy for arteriosclerosis, in major arteries. We found that higher Lp(a) levels were consistently associated with larger volumes of calcification in the coronary arteries, aortic arch, extracranial carotid arteries, and intracranial carotid arteries. The findings of our study indicate that Lp(a) is a systemic risk factor for arteriosclerosis, suggesting that the systemic burden of arteriosclerosis throughout the arterial system could be reduced by targeting Lp(a).
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