scholarly journals Effects of dietary fat modification on insulin sensitivity and on other risk factors of the metabolic syndrome—LIPGENE: a European randomized dietary intervention study

2010 ◽  
Vol 35 (6) ◽  
pp. 800-809 ◽  
Author(s):  
A C Tierney ◽  
J McMonagle ◽  
D I Shaw ◽  
H L Gulseth ◽  
O Helal ◽  
...  
2000 ◽  
Vol 83 (S1) ◽  
pp. S157-S163 ◽  
Author(s):  
David J. A. Jenkins ◽  
Mette Axelsen ◽  
Cyril W. C. Kendall ◽  
Livia S. A. Augustin ◽  
Vladimir Vuksan ◽  
...  

Several epidemiological studies link consumption of fibre-rich foods to a reduced risk of type 2 diabetes and CHD. The ‘fibre hypothesis’ suggested that this was a direct effect of fibre. However, fibre-rich foods contain different types of fibre as well as other potentially beneficial compounds, and many foods naturally high in fibre have low glycaemic and insulinaemic indices, possibly due to food form. The question therefore emerges as to the effect of isolated fibre per se on insulin sensitivity, lipids and other risk factors associated with the metabolic syndrome. Many beneficial effects are seen with pharmacological doses of isolated viscous soluble fibre, including improved insulin sensitivity, decreased LDL-cholesterol levels and decreased clotting factors. Similar effects are seen with low glycaemic-index foods. In contrast, insoluble non-viscous cereal fibre is not seen to act directly on risk factors when taken in refined foods such as in milled flour. Since cereal fibre, the major type of fibre in western diets, does not directly act on the risk factors for the metabolic syndrome, the question remains as to possible mechanisms. Until now, fibre and the nature and processing of the starch and particle size have been seen as the main determinants of the metabolic response to starchy foods. However, fibre-rich foods also have an increased protein-to-carbohydrate ratio. Hence we suggest that the protective effect of fibre may also be due to increased vegetable protein content, which may act directly to reduce clotting factors and oxidized LDL-cholesterol levels.


The Lancet ◽  
2009 ◽  
Vol 373 (9666) ◽  
pp. 829-835 ◽  
Author(s):  
Jing Chen ◽  
Dongfeng Gu ◽  
Jianfeng Huang ◽  
Dabeeru C Rao ◽  
Cashell E Jaquish ◽  
...  

2011 ◽  
Vol 96 (12) ◽  
pp. E1999-E2008 ◽  
Author(s):  
Joanne F. Dorgan ◽  
Lea Liu ◽  
Bruce A. Barton ◽  
Snehal Deshmukh ◽  
Linda G. Snetselaar ◽  
...  

2019 ◽  
Vol 180 (5) ◽  
pp. 321-328 ◽  
Author(s):  
Hanne L Gulseth ◽  
Ingrid M F Gjelstad ◽  
Audrey C Tiereny ◽  
Danielle McCarthy ◽  
Julie A Lovegrove ◽  
...  

Objective Impaired insulin secretion and action contribute to the development of type 2 diabetes. Dietary fat modification may improve insulin sensitivity, whereas the effect on insulin secretion is unclear. We investigated the effect of dietary fat modification on insulin secretion in subjects with the metabolic syndrome. Design In a 12-week pan-European parallel, randomized controlled dietary intervention trial (LIPGENE), 486 subjects were assigned to four isoenergetic diets: high-fat diets rich in saturated fat (HSFA) or monounsaturated fat (HMUFA) or low-fat, high-complex carbohydrate diets with (LFHCC n-3) or without (LFHCC control) 1.2 g/day of n-3 PUFA supplementation. Insulin secretion was estimated as acute insulin response to glucose (AIRg) and disposition index (DI), modeled from an intravenous glucose tolerance test. Results There were no overall effect of the dietary intervention on AIRg and DI in the total cohort, in neither the high-fat nor LFHCC groups. We observed significant diet*fasting glucose category interactions for AIRg (P = 0.021) and DI (P = 0.001) in the high-fat groups. In subjects with normal fasting glucose and preserved first phase insulin secretion, the HMUFA diet increased, whereas the HSFA diet reduced AIRg (P = 0.015) and DI (P = 0.010). Conclusions The effects of dietary fat modification on insulin secretion were minor, and only evident in normoglycemic subjects. In this case, the HMUFA diet improved AIRg and DI, as compared to the HSFA diet.


2017 ◽  
Vol 88 (3-4) ◽  
pp. 265-273 ◽  
Author(s):  
Christiane S. Hampe ◽  
Michele L. Shaffer ◽  
Christian L. Roth

Background: Obesity is strongly associated with insulin resistance, hypertension, dyslipidemia, and therefore risk for metabolic syndrome (MetS), which is an increasing problem in youth. The potential role of elevated liver enzyme levels in this context needs to be further investigated. Methods: This paper provides a post hoc analysis of a cross-sectional study of 77 obese nondiabetic children (51% female; median age 11.7 years; BMI >97th percentile) enrolled at the University of Bonn, Bonn, Germany. Anthropometric parameters, lipid profiles, glycemic control, and liver enzyme levels were evaluated. Glucose and insulin levels were determined during an oral glucose tolerance test (OGTT). Gender- and age-specific cutoff values were used to assess MetS. Results: A high prevalence of hypertension (51%), dyslipidemia (52%), elevated liver enzyme levels (51%), and hyperglycemia (24%) was found. There was considerable overlap between the presence of different MetS risk factors in individuals, and 40% of the participants had ≥3 of a maximum of 5 MetS risk factors. Elevated liver enzyme levels were significantly associated with reduced insulin sensitivity, as the OGTT-insulin response was significantly higher in participants with elevated transaminases (p = 0.01). This association was independent of hyperglycemia and dyslipidemia (p = 0.03). Conclusions: We conclude that liver enzyme levels are related to insulin sensitivity in obese children and could therefore be an indirect indicator for MetS. Testing for disturbed glucose metabolism should be considered for obese children with elevated liver enzymes.


2004 ◽  
Vol 23 (4) ◽  
pp. 447-456 ◽  
Author(s):  
G Riccardi ◽  
R Giacco ◽  
A.A Rivellese

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