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  • Title: Childhood levels of serum apolipoproteins B and A-I predict carotid intima-media thickness and brachial endothelial function in adulthood: the cardiovascular risk in young Finns study.
    Author: Juonala M, Viikari JS, Kähönen M, Solakivi T, Helenius H, Jula A, Marniemi J, Taittonen L, Laitinen T, Nikkari T, Raitakari OT.
    Journal: J Am Coll Cardiol; 2008 Jul 22; 52(4):293-9. PubMed ID: 18634985.
    Abstract:
    OBJECTIVES: The aim of this study was to determine whether apolipoproteins (apo) B and A-I measured in childhood and adolescence predict atherosclerosis in adulthood. BACKGROUND: Exposure to dyslipidemia in childhood predicts the development of atherosclerosis. Apolipoproteins B and A-I might be good markers of atherogenic dyslipidemia, but there is a paucity of information concerning their importance in childhood. METHODS: Apolipoproteins B and A-I, low-density lipoprotein (LDL)-cholesterol, high-density lipoprotein (HDL)-cholesterol, triglycerides, blood pressure, obesity, insulin, C-reactive protein, and smoking were assessed in 1980 and 2001 among 879 subjects in the Cardiovascular Risk in Young Finns Study (ages 3 to 18 years at baseline). Carotid artery intima-media thickness (IMT) and brachial artery flow-mediated dilation (FMD) were measured in 2001 at the age of 24 to 39 years. RESULTS: In subjects ages 12 to 18 years at baseline, apoB and apoB/apoA-I ratio were directly (p < 0.001) related and apoA-I was inversely (p = 0.01) related with adulthood IMT. In subjects ages 3 to 18 years at baseline, apoB (p = 0.02) and the apoB/apoA-I ratio (p < 0.001) were inversely related and apoA-I (p = 0.003) was directly related to adulthood FMD. These relations were not altered when the effects of nonlipid risk factors and adulthood apolipoproteins were taken into account. The apoB/apoA-I ratio measured in adolescence was superior to LDL/HDL ratio (c-values, 0.623 vs. 0.569, p = 0.03) in predicting increased IMT in adulthood (IMT >or=90th percentile and/or carotid plaque). CONCLUSIONS: Apolipoproteins B and A-I measured in children and adolescents reflect a lipoprotein profile predisposing to the development of subclinical atherosclerosis in adulthood. These markers might have value in pediatric lipid risk assessment.
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