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The Effect of Dietary Fat Modification on Risk Factors Associated With the Metabolic Syndrome

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00429195
Recruitment Status : Completed
First Posted : January 31, 2007
Last Update Posted : January 21, 2013
University of Reading
University of Oslo
Institut National de la Santé Et de la Recherche Médicale, France
Maastricht University Medical Center
Universidad Nacional de Córdoba
Jagiellonian University
Uppsala University
Information provided by:
University College Dublin

Brief Summary:
The LIPGENE Human Dietary Intervention Study, multi-centre, trans -European, single-blinded, randomised, controlled trial with two principal aims. Firstly to determine the relative efficacy of reducing dietary SFA consumption, by altering quality of dietary fat and reducing the quantity of dietary fat, on metabolic and molecular risk factors of the metabolic syndrome. Secondly to determine if common genetic polymorphisms affect an individual's responsiveness to dietary therapy.

Condition or disease Intervention/treatment Phase
Metabolic Syndrome Behavioral: Dietary Fatty Acid Modification Not Applicable

Detailed Description:
521 free-living subjects with the metabolic syndrome received one of four dietary treatments for 12 weeks: (1) High-fat (38% energy) SFA-rich diet; (2) High-fat (38% energy), MUFA-rich diet; (3) Isocaloric low-fat (28% energy), high-complex carbohydrate diet and (4) Isocaloric low-fat (28% energy), high-complex carbohydrate diet, with 1 g/d LC n-3 PUFA. A 3-day weighed food intake assessed dietary compliance pre-, mid- and post- intervention. An IVGTT, lipoprotein analysis, cytokine, adhesion molecule, coagulation factor and isoprostane levels were determined pre- and post-intervention. DNA, adipose and skeletal muscle biopsies, and PBMC were isolated to characterise nutrient sensitive molecular markers of insulin sensitivity.

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Study Type : Interventional  (Clinical Trial)
Enrollment : 480 participants
Allocation: Randomized
Intervention Model: Single Group Assignment
Masking: Single
Primary Purpose: Treatment
Official Title: LIPGENE Dietary Intervention Study
Study Start Date : February 2004
Study Completion Date : January 2007

Resource links provided by the National Library of Medicine

Primary Outcome Measures :
  1. IVGTT
  2. Lipoprotein metabolism
  3. Cytokine profiles
  4. Coagulation
  5. Fibrinolysis
  6. Oxidative status

Information from the National Library of Medicine

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Ages Eligible for Study:   35 Years to 70 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Gender: males and females (not pregnant or lactating).
  • Body Mass Index (BMI) 20-40 kg/m2
  • Total cholesterol concentration equal to or < 8.0 mmol/l.
  • Medications / nutritional supplements allowed, on condition that the subjects adhere to the same regimen during the intervention: anti-hypertensive medication (including beta-blockers), oral contraceptives, hormone replacement therapy, multi-vitamin supplements, other non-fatty acid based nutritional supplements (e.g. garlic, anti-oxidants, etc).
  • Smokers and non-smokers.
  • Regular consumers of alcohol, which is not excessive as defined by elevated liver enzymes (AST and ALT).
  • Ethnicity: Intention to include white Europeans.

Exclusion Criteria:

  • Diabetes or other endocrine disorders.
  • Chronic inflammatory conditions.
  • Kidney or liver dysfunction.
  • Iron deficiency anaemia (haemoglobin < 12g/dl men, < 11g/dl women)
  • Prescribed hypolipidaemic medication
  • Prescribed anti-inflammatory medication
  • Fatty acid supplements including fish oils, evening primrose oil, etc.
  • Consumers of high doses of antioxidant vitamins (A, C, E, beta-carotene).
  • Red rice yeast (Monascus purpureus) supplement usage.
  • High consumers of oily fish (> 2 serving of oily fish per week of herring, mackerel, kippers, pilchards, sardines, salmon, trout, tuna (fresh), crabmeat or marlin). One portion is defined as a small herring or mackerel, one can of salmon or sardines or one salmon or tuna steak. Tinned tuna is permitted as it contains only minor amounts of long chain n-3 PUFAs.
  • Highly trained or endurance athletes or those who participate in more than 3 periods of intense exercise per week.
  • Volunteers planning to start a special diet or loose weight (e.g. the Slimfast Plan, Atkins Diet etc).
  • Weight change equal or >3kg within the last 3 months.
  • Alcohol or drug abuse (based on clinical judgement).
  • Pregnant / lactating females / women planning a pregnancy in the next 12 months. Women who become pregnant during the dietary intervention period should be removed from the study.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00429195

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Nutrigenomics Research Group, Institute of Molecular Medicine, University of Dublin, Trinity College
Dublin, Ireland, 8
Sponsors and Collaborators
University College Dublin
University of Reading
University of Oslo
Institut National de la Santé Et de la Recherche Médicale, France
Maastricht University Medical Center
Universidad Nacional de Córdoba
Jagiellonian University
Uppsala University
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Study Director: Helen M Roche, PhD University of Dublin, Trinity College
Principal Investigator: Christine Williams, PhD University of Reading
Principal Investigator: Christian Drevon, MD University of Oslo
Principal Investigator: Denis Larion, PhD INSERM, Marseille
Principal Investigator: Wim Saris, PhD Maastricht University
Principal Investigator: Jose Lopez Miranda, MD, PhD Universidad de Córdoba
Principal Investigator: Aldona Dembinska-Kiec, MD The Jagiellonian University Medical College
Principal Investigator: Bengt Vessby, MD Uppsala University
Publications automatically indexed to this study by Identifier (NCT Number):

Layout table for additonal information Identifier: NCT00429195    
Other Study ID Numbers: LIPGENE Dietary Intervention
First Posted: January 31, 2007    Key Record Dates
Last Update Posted: January 21, 2013
Last Verified: January 2007
Keywords provided by University College Dublin:
Fatty acid
Dietary intervention
Metabolic syndrome
Insulin resistance
Additional relevant MeSH terms:
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Metabolic Syndrome
Pathologic Processes
Insulin Resistance
Glucose Metabolism Disorders
Metabolic Diseases