Abstract | BACKGROUND: METHODS: After fasting for 12 h 15 morbidly obese patients (BMI 51.4±6.5 kg/m2, 43.7±12.6 years) received a standardized oral fat load before and 3 months after bariatric surgery (sleeve gastrectomy). Controls (n=9, BMI 23.1±1.4 kg/m²) were studied once. Plasma was obtained fasting and then postprandially every 2 h for 8 h. Triglycerides (TG), chylomicron-TG (CM-TG), VLDL/ chylomicron-remnant (VLDL/CR)-TG, cholesterol, LDL- cholesterol, VLDL/CR- cholesterol and HDL-cholesterol were isolated by ultracentrifugation at each time point. Postprandial values were expressed as area under the curve (AUC) and incremental area under the curve (iAUC). In addition, fasting glucose and insulin values and HOMA-IR-Index was measured (n=14). RESULTS: Compared to controls morbidly obese patients had elevated TG and slightly altered postprandial lipids. Following surgery ( weight loss 23.4 kg±6.2 kg; p<0.001) fasting TG (-19.1%; p=0.04), VLDL/CR-TG (-20.0%; p=0.05) decreased significantly, while fasting cholesterol, VLDL-, HDL- and LDL-cholesterol did not change. AUC and iAUC decreased significantly for VLDL/CR-TG (-20.4%, p=0.04 and -38.5%, p=0.04, respectively). Neither fasting nor postprandial changes correlated with the change in weight. In patients with preoperatively elevated TG (>150 mg/dl) a similar pattern was observed. Fasting insulin and HOMA were reduced significantly (-51.9%; p=0.004 and -47.9%; p=0.011). CONCLUSIONS: Three months after sleeve gastrectomy fasting and postprandial lipoprotein metabolism and glucose metabolism is improved in morbidly obese patients. The potential mechanisms may relate to decreased caloric intake but also to hormonal changes.
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Authors | Elisa Waldmann, Thomas P Hüttl, Burkhard Göke, Reinhold Lang, Klaus G Parhofer |
Journal | Lipids in health and disease
(Lipids Health Dis)
Vol. 12
Pg. 82
(Jun 01 2013)
ISSN: 1476-511X [Electronic] England |
PMID | 23725203
(Publication Type: Journal Article)
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Chemical References |
- Cholesterol, HDL
- Cholesterol, LDL
- Cholesterol, VLDL
- Chylomicrons
- Insulin
- Lipoproteins
- Triglycerides
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Topics |
- Adult
- Atherosclerosis
(blood)
- Bariatric Surgery
- Cholesterol, HDL
(blood)
- Cholesterol, LDL
(blood)
- Cholesterol, VLDL
(blood)
- Chylomicrons
(blood)
- Female
- Gastrectomy
- Humans
- Hypertriglyceridemia
(blood)
- Insulin
(blood)
- Lipoproteins
(blood)
- Male
- Middle Aged
- Obesity, Morbid
(blood, pathology, surgery)
- Postprandial Period
- Triglycerides
(blood)
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