Omacor for the Treatment of Vascular Dysfunction in Patients With Type 2 Diabetes Mellitus

May 7, 2009 updated by: Ruhr University of Bochum

Effects of Treatment With Omacor for 6 Weeks on Preprandial and Postprandial Endothelial Function Following a High Fat Meal in Patients With Type 2 Diabetes Mellitus

The purpose of the study is to determine whether a 6-week treatment with 4 g Omacor/day improves the baseline and postprandial endothelial function (after a high-fat meal) in patients with type 2 diabetes mellitus.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Patients with type 2 diabetes mellitus (T2DM) have a 2 to 5-fold increase in cardiovascular mortality compared to non-diabetics.

Endothelial dysfunction (ED) is an early messenger of atherosclerosis and is present in states showing a high cardiovascular (CV) risk, such as active and passive smoking, dyslipidemia, arterial hypertension, obesity, hyperhomocysteinemia, coronary artery disease, congestive heart failure and type 1 and type 2 diabetes mellitus. Endothelial function is a variable with a large day-to-day variation and shows great excursions even within one day. Several factors might play a role such as hormonal status, physical activity, sleep quality, but the most important seems to be the postprandial state. Postprandial ED was demonstrated not only in patients with CV disease or diabetes, but even in healthy subjects. A large body of evidence has accumulated showing distinctive and cumulative effects of hyperglycemia and hypertriglyceridemia on postprandial ED. Since postprandial dysmetabolism was linked to CVD, ED was proposed to be the mechanism connecting them. Considering that the postprandial state covers most of our daytime, interventions targeting a reduction in postprandial ED might play a decisive role in atherosclerosis prevention.

For the treatment of postprandial ED several therapeutical approaches have been suggested such as folic acid, tetrahydrobiopterin, vitamins C and E and statins.

Some properties of omega-3 fatty acids suggest that such an impairment of postprandial endothelial dysfunction could be prevented by treatment with Omacor® and the purpose of our study is to demonstrate that a six-week therapy with Omacor prevents endothelial dysfunction in fasting state and following a high-fat meal.

Several controlled clinical studies conducted in persons with TM2DM or after myocardial infarction have shown that consumption of omega-3 long chain polyunsaturated fatty acids (n-3 PUFA) have several beneficial effects such as: lowers risk of primary cardiac arrest, reduces triglyceride levels, increases high-density lipoprotein levels, reduces platelet aggregability, acts anti-inflammatory and immune-modulating, lowers blood pressure and improves endothelial function.

Consumption of n-3 fatty acids was shown to positively influence platelet, fibrinolytic and vascular function in hypertensive type 2 diabetic patients. Mediterranean- style diet restores markers of endothelial dysfunction and inflammation in persons with metabolic syndrome and improves endothelial function in hypercholesterolemic men.

Since Omacor contains in high-dose purified n-3 fatty acids eicosapentaenoic and docosahexaenoic acid (EPA and DHA), our first hypothesis is that a 6-week therapy with 4g/d Omacor improves fasting endothelial function in persons with T2DM.

In patients with T2DM, a three-week diet with a high amount of polyunsaturated fatty acids compared to a diet with a high amount of monounsaturated fatty acids, produces a significantly lower increase in postprandial lipemia after an oral fat load. Since postprandial lipemia induces transient endothelial dysfunction, our second hypothesis is that treatment with Omacor prevents postprandial impairment of endothelial function after a high fat meal.

Study Type

Interventional

Enrollment (Anticipated)

34

Phase

  • Phase 4

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Germany
    • NRW
      • Bad Oeynhausen, NRW, Germany, 32545
        • Heart- and Diabetes Centre NRW, Diabetes Clinic

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

35 years to 70 years (ADULT, OLDER_ADULT)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Type 2 diabetes mellitus

Exclusion Criteria:

  • History of myocardial infarction, stroke
  • Severe diabetes complications
  • Severe hypo- or hypertension
  • Chronic alcohol abuse
  • Renal failure

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: TREATMENT
  • Allocation: RANDOMIZED
  • Interventional Model: CROSSOVER
  • Masking: DOUBLE

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Postprandial (2, 4 and 6 hours) flow-mediated vasodilation after a 6-week treatment with Omacor

Secondary Outcome Measures

Outcome Measure
Baseline flow-mediated vasodilation after a 6-week treatment with Omacor

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Ruhr University of Bochum

Collaborators

Heart and Diabetes Center North-Rhine Westfalia
Solvay Pharmaceuticals

Investigators

  • Principal Investigator: Diethelm Tschoepe, MD, Prof., Heart and Diabetes Center North-Rhine Westfalia
  • Principal Investigator: Alin Stirban, MD, Heart and Diabetes Center North-Rhine Westfalia

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

April 1, 2007

Primary Completion (ACTUAL)

November 1, 2008

Study Completion (ACTUAL)

November 1, 2008

Study Registration Dates

First Submitted

May 19, 2006

First Submitted That Met QC Criteria

May 19, 2006

First Posted (ESTIMATE)

May 22, 2006

Study Record Updates

Last Update Posted (ESTIMATE)

May 8, 2009

Last Update Submitted That Met QC Criteria

May 7, 2009

Last Verified

May 1, 2009

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • OMACOR-D-01/06

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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