The Effect of n-3 LCPUFA on Immune Function and Cardiovascular Risk Factors

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: NCT00266292
Recruitment Status : Unknown
Verified December 2005 by University of Copenhagen.
Recruitment status was:  Active, not recruiting
First Posted : December 16, 2005
Last Update Posted : May 28, 2010
Danish Research Agency
Technical University of Denmark
Information provided by:
University of Copenhagen

Brief Summary:
The purpose of this study is to investigate the effects of long-chain n-3 polyunsaturated fatty acids (n-3 LCPUFA) on immune function and cardiovascular disease risk

Condition or disease Intervention/treatment Phase
Cardiovascular Heart Disease Metabolic Syndrome Behavioral: Fish oil (Bio-Marine, Pharma Nord) Behavioral: n-6 PUFA intake (Margarine+sunflower oil vs. butter product+rapeseed oil) Not Applicable

Detailed Description:

In a controlled, double-blinded human intervention study the effects of fish oil versus control (olive oil) and of a high versus low consumption of n-6 polyunsaturated fatty acids are investigated. Sixty-seventy healthy men will be randomized to oil capsules and to substitute their dietary fats with one of two types of oil and butter-product that we provide. Outcome variables are ex vivo cytokine production in full blood and isolated immune cells after 24 h of stimulation with bacteria or bacterial components, blood pressure and arterial function, plasma concentrations of cholesterol, triacylglycerol, C-reactive protein and a number of other markers of endothelial function and cardiovascular risk.

The hypotheses are that both increased intake of n-3 polyunsaturated fatty acids (from fish oil) and a low consumption of n-6 polyunsaturated fatty acids increase incorporation of docosahexanoic acid in immune cell membranes and that this decreases the inflammatory response and potential and improve overall cardiovascular disease risk.

The mechanistic aspects of this will be further explored by in vitro studies with monocytes cultured in the presence of varying amounts of polyunsaturated fatty acids.

Study Type : Interventional  (Clinical Trial)
Enrollment : 60 participants
Allocation: Randomized
Intervention Model: Factorial Assignment
Masking: Double
Primary Purpose: Prevention
Study Start Date : September 2005
Study Completion Date : April 2006

Resource links provided by the National Library of Medicine

Primary Outcome Measures :
  1. Fatty acid composition of PMBC - before and after 2 mo of interventions and after 2 mo of follow-up
  2. Ex vivo cytokine production (e.g. IL-6, TNF-α, IL-10, and interferon-γ) in whole blood and PBMC cultures after 24 h of stimulation - before and after interventions and after follow up
  3. Plasma CRP, IL-6 & fibrinogen - before, after and follow-up
  4. Plasma lipid profile: TAG, cholesterol, LDL & HDL - before, after and follow-up
  5. Blood pressure - before, after and follow-up

Secondary Outcome Measures :
  1. Anthropometric measures - before, after & follow-up
  2. Ex vivo cytokine production in isolated monocytes - after intervention only
  3. Endothelial function (PWV and/or arterial compliance) - before & after
  4. Superoxide production in full blood samples - before & after
  5. Plasma insulin/glucose - before, after and follow-up
  6. Plasma markers of endothelial function (e.g. VCAM-1, ICAM-1, Matrix metallo proteinases, E- & P-selectin, nitrite and endothelin-1) - before and after
  7. Plasma CD40L - before, after and follow-up
  8. RBC fatty acid composition - before, after and follow-up
  9. Coagulation factors (e.g. PAI, tPA, factor VII) - before, after and follow-up
  10. Folate/homocysteine - before. after and follow-up
  11. Lipoprotein(a) - before, after and follow-up

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Ages Eligible for Study:   18 Years to 40 Years   (Adult)
Sexes Eligible for Study:   Male
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Healthy (no chronic diseases and no regular medications)
  • BMI >18.5 and <27.5 kg/m2
  • Daily use of fats and home cooking >5 d/wk
  • Heavy exercise <7 h/wk
  • Not daily smokers (<5 cigarets/wk)

Exclusion Criteria:

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): NCT00266292

Department of Human Nutrition
Frederiksberg, Denmark, DK-1958
Sponsors and Collaborators
University of Copenhagen
Danish Research Agency
Technical University of Denmark
Principal Investigator: Lotte Lauritzen, Ph.D Department of Human Nutrition, Royal Veterinary and Agricultural University, Denmark

Publications of Results: Identifier: NCT00266292     History of Changes
Other Study ID Numbers: KF 01 267804
SJVF 23-04-0050
IHE project no. A-304
First Posted: December 16, 2005    Key Record Dates
Last Update Posted: May 28, 2010
Last Verified: December 2005

Keywords provided by University of Copenhagen:
Fish oil
Polyunsaturated fatty acid
Immune function
Endothelial function
Cardiovascular risk factors

Additional relevant MeSH terms:
Heart Diseases
Metabolic Syndrome X
Cardiovascular Diseases
Insulin Resistance
Glucose Metabolism Disorders
Metabolic Diseases