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The correlation of apolipoprotein B, apolipoprotein B/apolipoprotein A-I ratio and lipoprotein(a) with myocardial infarction

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Agoston-Coldea L., Mocan T., Gatfossé M., Dumitrascu D.
Open Medicine
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2008
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vol. 3
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issue 4
422-429
EN
Recent evidence shows that apolipoprotein (apo) B, apoB/apoA-I ratio and lipoprotein(a) are better indicators of coronary risk than the conventional lipid profile. The aim of this study was to evaluate the correlation of apoA-I and B, and lipoprotein(a) with myocardial infarction (MI). We performed a cross-sectional study including 208 patients (100 men and 108 women), with and without previous MI evaluated by coronary angiography. The severity of coronary heart disease was scored on the basis of the number and extent of lesions in the coronary arteries. Lipid levels were measured by the enzymatic method and apolipoprotein levels were measured by the immunoturbidimetric method. The MI group had higher plasmatic levels of lipoprotein(a) (0.37±0.28 vs. 0.29±0.23 g/L, p<0.05), apoB (1.13±0.40 vs. 0.84±0.28 g/L, p<0.05) and of the apoB/apoA-I ratio (0.77±0.37 vs. 0.68±0.20, p<0.05) compared to controls. The area under the receiver operating characteristic (ROC) curves (AUC) suggested a good reliability in the diagnose of coronary heart disease for the apoB/apoA-I ratio (0.756, p<0.05), apoB (0.664, p<0.05), lipoprotein(a) (0.652, p<0.05) and total cholesterol/HDL-cholesterol (0.688, p<0.05). Multivariate analysis performed with adjustments for cardiovascular risk factors, showed that the levels of lipoprotein(a), apoB and apoB/apoA-I ratio are significant independent cardiovascular risk factors. Our results indicate that there is an important relationship among high plasma apoB concentration, lipoprotein(a) concentration, the apoB/apoA-I ratio, and MI. We showed that the apoB/apoA-I ratio has a stronger correlation with MI than the total cholesterol/HDL cholesterol ratio. We therefore suggest using apoB/apoA-I ratio and lipoprotein(a) in clinical practice as a markers of MI risk.
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Asymmetric and symmetric dimethylarginine in patients presenting with risk factors for coronary heart disease

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Ilic M., Pavlovic R., Lazarevic G., Cvetkovic T., Kocic G., Ilic S., Stefanovic V.
Open Medicine
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2012
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vol. 7
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issue 5
659-664
EN
The aim of the present study was to investigate asymmetric (ADMA) and symmetric dimethylarginine (SDMA) production in patients presenting with one or more risk factor (RF) for coronary heart disease (CHD). Patients and methods: Overall, 113 participants were enrolled in the study, including 45 patients presenting with risk for CHD (27 male and 18 female; aged 55.9 ± 6.4 years), 30 sex and age-matched middle-aged healthy controls (16 male and 14 female; aged 56.3 ± 8.4 years), and 38 young healthy controls (38 male; aged 24.6 ± 3.9 years). Results: No significant differences for ADMA and SDMA were recorded between patients groups presenting with risk for CHD. However, ADMA and SDMA were significantly higher in all examined patient groups (≥3 and 1–2 RF, hypertensive and non-hypertensive, obese and non-obese, diabetics and non-diabetics) compared with both control groups (middle-aged and young controls) (p<0.001). ADMA significantly correlated with SDMA in ≥3 RF (p<0.05), hypertensive (p<0.05), non-obese (p<0.05), non-diabetics (p<0.01), as well in middle-aged (p<0.05) and young controls (p<0.001). Conclusion: Significantly higher ADMA and SDMA were found between patients presenting with risk for CHD (≥3 and 1–2 RF, hypertensive and nonhypertensive, obese and non-obese, diabetics and non-diabetics) and healthy, middle-aged and young controls. ADMA significantly correlated with SDMA in ≥3 RF, hypertensive, non-obese and non-diabetic patients, as well as in middle-aged and young controls.
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