Abdominal Obesity, Cardiovascular Diseases, Impaired Glucose Tolerance, Insulin Resistance, Type 2 Diabetes
Conditions
Keywords
Systems biology, Nutrition, Nordic diet, Dietary recommendations, Metabolic syndrome, Features of metabolic syndrome
Brief summary
SYSDIET (Systems biology in controlled dietary interventions and cohort studies) is one of the three centres in the NCoE Food, Nutrition and Health, 2007-2011. It consists of 12 partners from five Nordic countries working on multidisciplinary fields of science related to nutritional biology. The main objective of SYSDIET is to reveal mechanisms by which Nordic foods and diets could be modified to promote health and prevent insulin resistance, type 2 diabetes and cardiovascular diseases, all of which being connected to metabolic syndrome. Furthermore, the aim is to build up a Nordic platform for cohort studies and carefully conducted multi-centre dietary intervention studies, where novel nutritional systems biology tools can be applied besides human studies also in animal and cell culture studies. In order to achieve the main objective a Nordic multi-centre randomized controlled human intervention study is being conducted in 2009-2010 in 6-8 centres of SYSDIET consortium. Health of the Nordic populations has substantially improved during the last 30 years. This is due e.g. to marked decline in cardiovascular morbidity and mortality. However, during the last 10-20 years increasing obesity and sedentary lifestyle have resulted in an increase of metabolic syndrome and type 2 diabetes. Having this background, the aim of the SYSDIET consortium is to carry out a controlled, randomized dietary intervention study in persons with features of metabolic syndrome to find out the effects of a healthy Nordic food on major abnormalities in metabolic syndrome. Altogether 167 persons aged 30 to 65 years were recruited from 6-8 centers (40-60 subjects/center) of the SYSDIET cohort. The main inclusion criterion is BMI 27-38 kg/m2. The subjects should also have at least two other IDF criteria for metabolic syndrome. Recruited persons will start the study by following their conventional diet for one month as a run-in period. After that subjects will be randomly assigned into Experimental- or Control-diet-group for 6 months. Experimental diet is rich in whole grain products, berries, fruits, vegetables and fish, and its fat intake is modified according to current Nordic recommendations. Control diet is based on the current information of the mean dietary intake and food consumption. The diets will be realized according to eating habits in each Nordic country.
Detailed description
Substudy of the multicentre SYSDIET-study has been conducted in one of the centres, Aarhus, Denmark. This study aims was determine if a Healthy Nordic Diet (HND) fulfilling the Nordic Nutrition Recommendations does affect 24-h ambulatory BP in subjects with features of Metabolic Syndrome. Of the 167 SYSDIET subjects with MeS, 37 were enrolled in a Danish sub study on 24-h ambulatory BP performed at 0 and 12 wks after randomization. 32 completed the sub study. All maintained stable body weight, physical activity level, medicine, and alcohol habits during the intervention, as prescribed.
Interventions
OTHERExperimental diet
Diet based on Nordic recommendations: rich in whole grain products, berries, fruits and vegetables, recommended fat quality. Realised based on eating habits of each Nordic country.
OTHERControl diet
Diet based on the information of the current dietary intake and food consumption in Nordic countries.
Sponsors
University of Copenhagen
Aarhus University Hospital
University of Oulu
University of Iceland
Oslo and Akershus University College
Uppsala University
Lund University
Marjukka Kolehmainen
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
PREVENTION
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
30 Years to 65 Years
Healthy volunteers
Yes
Inclusion criteria
* Age 30-65 years old * BMI 27-38 kg/m2 * \+ two other IDF criteria for metabolic syndrome * Anti-hypertensives and lipid-lowering medication are allowed
Exclusion criteria
* Fasting plasma glucose \> 7.0 mmol/l * Fasting plasma triglycerides \> 3.0 mmol/l * Fasting plasma total cholesterol \> 6.5 mmol/l * Blood pressure \> 160/100 mmHg * Preceding weight change of 5% or more or active weight loss during preceding 6 months * Any disease or condition that may hamper the successful participation of the intervention: liver disease, kidney disease, diabetes (both type 1 and type 2), thyroid disease (Newly found unstabilized disease), Myocardial infarction within previous 6 months * Alcohol abuse (\> 40 g/day) * Oral corticosteroid therapy * Severe psychiatric disorders * Cancer under treatment * Coeliac disease * Exceptional diets (Atkin's, vegan, allergies to fish or cereals, other extensive allergies) * Binge eating * Unwillingness to discontinue the use of fish and vegetable oil or stanol and sterol ester supplements or products
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Glucose metabolism | Study weeks 0 |
Secondary
| Measure | Time frame |
|---|---|
| Transcriptomics and metabolomics data | Study week 0 |
Countries
Denmark, Finland, Iceland, Norway, Sweden
Outcome results
None listed