In this thesis, we evaluated the acute and more long-term effects of different weight loss strategies; pure calorie restriction by very low calorie diet and gastric banding, versus the drastic... Show moreIn this thesis, we evaluated the acute and more long-term effects of different weight loss strategies; pure calorie restriction by very low calorie diet and gastric banding, versus the drastic surgical procedure Roux-en-Y gastric bypass. Moreover, we found differences between NGT and T2DM subjects at baseline, which enable us to better be able to dissect the subsequent effects of the procedures. To our surprise, and in contrast to previous studies, we observed no additional effect of the RYGB as compared to calorie restriction, on our main outcome parameters: postprandial glucose, insulin and the gut peptide levels three weeks after surgery. Furthermore, both restrictive and RYGB induced weight loss resulted in comparable effects on the lipidome, circulating thyroid hormone levels and the autonomic nervous system. For these outcome parameters, it seems that calorie restriction is the common denominator of the effect of the different weight loss strategies on the short term. Clearly distinct effects of RYGB, however, were seen on bile salt, FGF21 and glucagon levels in response to food intake. Although neither the exact mechanisms, nor the eventual metabolic effect are as yet clear, the gut-liver-pancreas axis may be an important mediator of the effect of the RYGB Show less
Research described in this thesis is based on clinical data obtained through diabetes cardiovascular risk management (DIACARM) project. A clinical protocol founded on the co-operation of the... Show moreResearch described in this thesis is based on clinical data obtained through diabetes cardiovascular risk management (DIACARM) project. A clinical protocol founded on the co-operation of the departments of endocrinology, cardiology, nephrology, radiology and nuclear medicine at the Leiden University Medical Center. This protocol is set to improve medical care at patient and provide more insight into cardiovascular risk stratification in asymptomatic patients with diabetes. The first part of the thesis focuses on the nature of coronary artery disease in diabetes, and its presentation with different imaging modalities. The relation between epicardial adipose tissue and plasma biomarkers with coronary atherosclerosis were investigated. Furthermore, extent and morphology of atherosclerosis are compared in patients with type 1- and type 2 diabetes. In the second part of the thesis the value of non-invasive vascular measurements (carotid intima media thickness, pulse wave velocity) and cardiac imaging techniques were evaluated and compared for risk stratification of coronary artery disease in diabetes. The final part of the thesis describes a novel technique, sidestream dark field imaging, for the assessment of the microcirculation at capillary level. Parameters of microcirculation were shown to have a relation with coronary artery disease in diabetes Show less
Rensing, K.L.; Jager, S.C.A. de; Stroes, E.S.; Vos, M.; Twickler, M.T.B.; Dallinga-Thie, G.M.; ... ; Thusen, J.H. von der 2014
