| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5986036 | Journal of Clinical Lipidology | 2014 | 10 Pages |
âºWe examined how rapid surgical weight loss affects HDL functionality.âºWeight loss is accompanied by significant alterations in HDL structure and function.âºThe apoA-I/apoE ratio of HDL may serve as surrogate marker of HDL functionality.âºThe apoA-I/apoCIII ratio of HDL may serve as surrogate marker of HDL functionality.
BackgroundIn addition to high-density lipoprotein cholesterol (HDL-C) levels, HDL quality appears also very important for atheroprotection. Obese patients with metabolic syndrome have significantly reduced HDL-C levels and are usually at increased risk for coronary heart disease. Despite that weight loss benefits these patients, its effects on HDL quality and functionality is currently poorly studied.ObjectivesWe investigated how rapid weight loss affects HDL structure and its antioxidant potential in patients undergoing a malabsorptive bariatric procedure.MethodsFasting plasma samples were collected the day before and 6 months after the bariatric procedure from 20 morbidly obese patients with body mass index >50, then HDL was isolated and analyzed by biochemical techniques.ResultsWe report a dramatic alteration in the apolipoprotein ratio of HDL that was accompanied by the presence of more mature HDL subspecies and a concomitant increase in the antioxidant potential of HDL. Interestingly, our obese cohort could be distinguished into 2 subgroups. In 35% of patients (n = 7), HDL before surgery had barely detectable apolipoprotein (apo) A-I and apoCIII, and the vast majority of their HDL cholesterol was packed in apoE-containing HDL particles. In the remaining 65% of patients (n = 13), HDL before surgery contained high levels of apoA-I and apoCIII, in addition to apoE. In both subgroups, surgical weight loss resulted in a switch from apoE to apoA-I-containing HDL.ConclusionsRapid weight loss exerts a significant improvement in HDL structure and functionality that may contribute to the documented beneficial effect of malabsorptive bariatric procedures on cardiovascular health.
