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  • Title: Effects of short-term modest weight loss on fasting and post-prandial lipoprotein sub-fractions in type 2 diabetes mellitus patients.
    Author: Ybarra J, James RW, Makoundou V, Bioletto S, Golay A.
    Journal: Diabetes Metab; 2001 Dec; 27(6):701-8. PubMed ID: 11852380.
    Abstract:
    OBJECTIVE: We assessed the efficacy of a modest weight loss (1.5 +/- 0.3 kg) and simultaneous rapid improvement in glycemic control on fasting an post-prandial lipoprotein sub-fractions in nine overweight (BMI=28 +/- 1.7 kg/m(2)) well controlled Type 2 diabetic patients (HbA(1c)=7.3 +/- 0.1%). MATERIAL AND METHODS: They followed a non-drastical hypocaloric balanced diet (1 561 +/- 39 kcal/day) over ten days in hospital. The fat content of the diet was significantly lowered from 96 +/- 12 g/day to 62 +/- 4 g/day (p<0.03). Plasma lipid and lipoprotein levels were measured in fasting and four hours after standard breakfast and four hours after standard lunch twice before and after ten days of hospitalization. The sub-fractions of very low density and low density lipoprotein were obtained by cumulative flotation ultracentrifugation. RESULTS: This weight loss reduced two well known independent cardiovascular risk factors such as the post-prandial glycemic excursions (p<0.05) and the post-prandial lipemia (p<0.05). Multiple linear regression analyses identified weight loss as an independent variable accounting for the ability to predict post-prandial capillary triglyceride clearance (p<0.05). Improvements in post-prandial glycemic excursions which was also entered as a parameter did not appear as a variable being able to predict these changes (p=0.4). In addition to the 23% improvement in post-prandial capillary triglyceride clearance (p<0.02), a decrement in post-prandial VLDL-2 triglyceride enrichment was found (p<0.05). Finally, fasting and post-prandial LDL-3 cholesterol levels were diminished (p<0.05) and the LDL-2/LDL-3 mass ratio post-prandial kinetics were improved (p<0.05). CONCLUSIONS: Even a modest weight loss in overweight, average controlled type 2 diabetic patients can achieve a significant improvement in two cardiovascular risk factors, namely post-prandial triglyceride excursions and the LDL-2/LDL-3 mass ratio kinetics independently from glycemic control improvements.
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