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  • Title: Effects of simvastatin on fasting and postprandial triglyceride-rich lipoproteins in patients with type I diabetes mellitus.
    Author: Noutsou M, Georgopoulos A.
    Journal: J Diabetes Complications; 1999; 13(2):98-104. PubMed ID: 10432174.
    Abstract:
    To assess the effect of simvastatin on fasting and postprandial triglyceride (TG)-rich lipoproteins in subjects with type 1 diabetes and elevated LDL cholesterol levels, eight patients participated in a simvastatin versus placebo, randomized, crossover study. At the end of each drug period fasting and postprandial lipoprotein studies were undertaken. Fasting plasma total and LDL cholesterol and apolipoprotein B (apo B) were significantly lower on simvastatin compared to placebo. Postprandial studies: simvastatin versus placebo consistently decreased the area under the curve (AUC, mean+/-SEM) of TG in plasma (12.52+/-9.07 versus 18.70+/-10.48 mmol x h/L, p = 0.02). Similarly, TG AUC was lower: in the chylomicron subfraction (Sf > 400) 3.24+/-2.71 versus 5.27+/-4.61 mmol x h/L p = 0.03; and in the [chylomicron remnant + VLDL] subfraction (Sf 20-400) 3.98+/-2.51 versus 7.04+/-3.88 mmol x h/L, p = 0.01. This was due to decreased particle n umber rather than size, as shown by a decrease in the AUC of apo B in Sf 20-400 (600+/-360 versus 980+/-600 mg x h/L, p = 0.02) and the lack of change in the ratio of TG/apo B. Intestinal lipoproteins contributed to the simvastatin effect, as shown by the lower AUC of retinyl esters in both subfractions. Chylomicrons: 627.61+/-363.43 versus 948.19+/-568.34 nmol x h/L, p = 0.02 and remnants: 129.23+/-67.12 versus 208.49+/-92.11 nmol x h/L, p = 0.04. Our data suggest an additional mechanism by which simvastatin can decrease the risk of atherosclerosis in patients with type I diabetes: a decrease of the number of circulating intestinal and hepatic postprandial TG-rich lipoprotein particles.
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