International journal of cardiology · 2015
Circulating soluble low-density lipoprotein receptor-related protein 1 (sLRP1) concentration is associated with hypercholesterolemia: A new potential biomarker for atherosclerosis.
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de Gonzalo-Calvo D, Cenarro A, Martínez-Bujidos M, Badimon L, Bayes-Genis A, Ordonez-Llanos J, Civeira F, Llorente-Cortés V
Аннотация
BACKGROUND: There is clinical interest in identifying novel lipid biomarkers for evaluating cardiovascular risk and targeting lipid-lowering treatment. Low-density lipoprotein receptor-related protein 1 (LRP1) plays a crucial role in the dysregulated cholesterol transfer from modified lipoproteins to human coronary vascular smooth muscle cells (hVSMCs), promoting hVSMC-derived foam cell formation. LRP1 has a soluble and circulating form (sLRP1) generated from LRP1. Cholesterol modulates the release of the soluble form of LRP1. Using in vitro, ex vivo and patient-based approaches, we tested the association between circulating sLRP1 concentrations and hypercholesterolemia and the potential of sLRP1 as a biomarker of atherosclerosis.
METHODS AND RESULTS: Circulating sLRP1 concentrations were higher in severe hypercholesterolemia compared to moderate hypercholesterolemia or normocholesterolemia (Study 1). Circulating sLRP1 was significantly associated with established pro-atherogenic lipid parameters in two different hypercholesterolemic populations (Studies 2 and 3). sLRP1 concentrations decreased after statin treatment and increased after statin withdrawal (Study 3). In vitro experiments showed that native LDL, aggregated LDL and VLDL+IDL lipoproteins induced the release of sLRP1 from hVSMC. sLRP1 levels were increased in the conditioned medium of coronary atherosclerotic plaque areas extracted from patients compared to non-atherosclerotic areas of the same coronary artery and patient. Circulating sLRP1 concentrations were independently associated with the occurrence of carotid atherosclerosis in a hypercholesterolemic population (Study 2). The later association was higher than that observed for other classical or novel lipid parameters.
CONCLUSIONS: Circulating sLRP1 is a new lipid-related parameter potentially useful as a biomarker for atherosclerosis.
METHODS AND RESULTS: Circulating sLRP1 concentrations were higher in severe hypercholesterolemia compared to moderate hypercholesterolemia or normocholesterolemia (Study 1). Circulating sLRP1 was significantly associated with established pro-atherogenic lipid parameters in two different hypercholesterolemic populations (Studies 2 and 3). sLRP1 concentrations decreased after statin treatment and increased after statin withdrawal (Study 3). In vitro experiments showed that native LDL, aggregated LDL and VLDL+IDL lipoproteins induced the release of sLRP1 from hVSMC. sLRP1 levels were increased in the conditioned medium of coronary atherosclerotic plaque areas extracted from patients compared to non-atherosclerotic areas of the same coronary artery and patient. Circulating sLRP1 concentrations were independently associated with the occurrence of carotid atherosclerosis in a hypercholesterolemic population (Study 2). The later association was higher than that observed for other classical or novel lipid parameters.
CONCLUSIONS: Circulating sLRP1 is a new lipid-related parameter potentially useful as a biomarker for atherosclerosis.