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The Triglyceride Lowering Effect of an Omega-3 Fat (DHA) in Addition to Statin Therapy for Patients With CAD or Diabetes

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: NCT00360217
Recruitment Status : Completed
First Posted : August 4, 2006
Last Update Posted : November 18, 2011
Information provided by:
Maine Center for Lipids and Cardiovascular Health

Brief Summary:

This study will explore the ability of an algae (ocean plant) omega-3 fat supplement (DHA) to reduce triglyceride levels in patients currently being treated with statin therapy (Zocor or simvastatin, Lipitor or atorvastatin, Pravachol or pravastatin, Crestor or rosuvastatin, etc.) for coronary artery disease(CAD)or risk equivalents (any of the following: heart attack, post angioplasty or stent, post coronary bypass surgery, angina, vascular disease, stroke or diabetes).

The rationale for the study is based around the finding that patients with CAD have an approximately 20 % reduction in the risk of sudden death when treated with fish oil (DHA is one of the ingredients in fish oil). In studies of statin-based therapies, it has been observed that statins reduce the risk of coronary events 20-45%. There has not yet been research trials exploring the combination of the two ingredients (i.e., DHA plus statin) in patient treatment either to reduce recurrent cardiac events or to address another reported finding of fish oils to lower triglyceride levels (triglyceride is a form of "blood fat"). This research project will be a pilot project to assess the safety and effectiveness of DHA "add-on" therapy in patients currently being treated with statins for CAD.

The study hypothesis is to test the effectiveness of DHA as compared to placebo to lower triglyceride levels in the blood. This is a double-blinded randomized clinical trial.

Condition or disease Intervention/treatment Phase
Hypertriglyceridemia (TG>200<500) Hyperlipidemia Coronary Artery Disease Coronary Risk Equivalent Diabetes Drug: docosahexanoic acid (DHA) Not Applicable

Detailed Description:

Omega-3 fatty acids (nPUFAs) have been embraced by Expert Panels and Guideline Committees of the American Heart Association as a result of randomized trials documenting reductions in cardiovascular events in patients with coronary artery disease. The antiarrhythmic effect or a modification in the atherogenicity of lipoprotein particles by nPUFA treatment are speculated mechanisms of action. Although precise bioactivity is not clear, nPUFAs have been demonstrated to lower triglyceride (TG) levels. TG reductions have also been demonstrated in three randomized clinical trials where nPUFAs in the form of fish oil containing both eicosapentanoic acid (EPA) and docosahexaenoic acid (DHA) have been added to ongoing statin therapy.

There are at least 8 large randomized clinical trials that have utilized statin agents as monotherapy to reduce cardiovascular events in patients with CAD. These trials have included more than 50,000 patients. The National Cholesterol Education Program (NCEP) recently released a "white paper" further reducing the LDL treatment target to 70 mg% as a result of four recently published trials. Although cardiovascular events rate and mortality reduction of 20-30% have been described, there is still a sizable number of patients experiencing untoward outcomes in spite of ongoing statin therapy. A variety of mechanisms of disease progression have been speculated including ongoing inflammation, insulin resistance and specific species of lipoprotein particles including HDL and LDL sub-classes. There has been recognition by the NCEP that beyond the treatment with statin therapies less tested methods of therapy might need to be applied. These therapies have included the lowering of triglycerides.

It is the purpose of this pilot study to explore the relationship of DHA as a strategy for triglyceride lowering in CAD patients receiving on-going statin therapy and candidates for the yet (untested) recommendation by NCEP of the need to lower triglyceride levels exceeding 200 mg% in statin-treated individuals.

  1. This is a single-center, prospective, randomized, double-blinded, placebo-controlled, parallel-group clinical trial of Martek's DHASCO™ versus placebo in subjects with CAD or risk equivalents (including type II DM)
  2. There will be a 4-wk run-in period to assure both diet and triglyceride stabilization.
  3. After the base-line run-in period, if triglyceride levels exceed 200 mg% they will be eligible to procede with the intervention either placebo or 2 grams of DHA
  4. Patients will be treated for an 8 week period. Visits will occur every other week during the treatment cycle.
  5. Laboroatory parameters to be followed during the course of the clinical trial includes: beta quantification of lipids, NMR particle analysis of lipoprotein particle size, apoprotein genotyping and other basic chemistry measurements

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Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 60 participants
Allocation: Randomized
Intervention Model: Single Group Assignment
Masking: Double
Primary Purpose: Treatment
Official Title: The Efficacy and Short-Term Safety of Docosahexaenoic Acid (DHA) and Statin Therapy for Subjects With Coronary Artery Disease or Cardiac Risk Equivalents With Moderate Hypertriglyceridemia (IIb)
Study Start Date : January 2006
Actual Study Completion Date : May 2007

Resource links provided by the National Library of Medicine

Primary Outcome Measures :
  1. Lowering of triglyceride level

Secondary Outcome Measures :
  1. Alteration of LDL particle size

Information from the National Library of Medicine

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Ages Eligible for Study:   21 Years to 80 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • CAD or Risk Equivalent
  • On any statin therapy
  • At NCEP LDL goal (<100)
  • TG>200 mg%

Exclusion Criteria:

  • TG>500, TG levels that vary more than 25% during base-line
  • Poorly controlled DM
  • BMI>40
  • Use of fibrates, niacin, other fish oil product

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): NCT00360217

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United States, Maine
Maine Center for Lipids and Cardiovascular Health
Scarborough, Maine, United States, 04074
Sponsors and Collaborators
Maine Center for Lipids and Cardiovascular Health
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Principal Investigator: Leonard M Keilson, MD, MPH Maine Center for Lipids and Cardiovascular Health
Layout table for additonal information Identifier: NCT00360217    
Other Study ID Numbers: 1
First Posted: August 4, 2006    Key Record Dates
Last Update Posted: November 18, 2011
Last Verified: July 2006
Keywords provided by Maine Center for Lipids and Cardiovascular Health:
Coronary Artery Disease
Fatty Acids
Fish Oil
Docosohexanoic Acid
Additional relevant MeSH terms:
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Coronary Artery Disease
Myocardial Ischemia
Coronary Disease
Heart Diseases
Cardiovascular Diseases
Arterial Occlusive Diseases
Vascular Diseases
Lipid Metabolism Disorders
Metabolic Diseases