Atorvastatin and Endothelial Function in Type 2 Diabetes Mellitus (ATTEND-Study)

This study has been completed.
Sponsor:
Collaborator:
Pfizer
Information provided by:
University of Southern Denmark
ClinicalTrials.gov Identifier:
NCT00124397
First received: July 26, 2005
Last updated: August 4, 2005
Last verified: July 2005
  Purpose

The aim of this study is to examine the effect of intensive cholesterol lowering therapy and tight blood pressure (BP) regulation on endothelial function (inner cell layer of vessels that determines dilatation) in type 2 diabetic patients without documented cardiovascular (CV) disease. The hypothesis is that intensive cholesterol lowering and tight blood pressure regulation will due better than a control group.


Condition Intervention Phase
Type 2 Diabetes Mellitus
Drug: Atorvastatin
Phase 4

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Efficacy Study
Intervention Model: Parallel Assignment
Masking: Double-Blind
Primary Purpose: Prevention
Official Title: Effect of High Dose Statin Therapy on Endothelial Function in Patients With Type 2 Diabetes Mellitus Without CAD

Resource links provided by NLM:


Further study details as provided by University of Southern Denmark:

Primary Outcome Measures:
  • Flow mediated vasodilatation (FMD) on atorvastatin

Secondary Outcome Measures:
  • FMD on combined treatment
  • FMD in relation to lipid levels
  • FMD in relation to BP lowering
  • CV events

Estimated Enrollment: 186
Study Start Date: July 2001
Estimated Study Completion Date: December 2004
Detailed Description:

Background:The prevalence of diagnosed type 2 diabetes mellitus (DM) is estimated to 2-4% in the general population in most European countries. DM is associated with an increased frequency of manifest atherosclerotic disease. Data from prospective studies demonstrate that the risk of developing acute coronary syndrome (ACS) in diabetic patients with no prior history of coronary artery disease (CAD) is equivalent to the risk observed in non-diabetics ACS survivors. Most diabetic patients die from CAD. Although DM is primarily a metabolic disorder, it imposes a tremendous burden on macro- and micro-vessel disease.The important question of primary prevention of cardiovascular disease (CVD) in DM remains unanswered.

In the major lipid-intervention studies where patients with CAD were included, the subgroup with DM had at least as good effect of lipid lowering therapy with statins as non-diabetics. The recently published Heart Protection Study supports the hypothesis of a favourable effect of statins in the primary prevention of CVD in DM. The UK Prospective Diabetic Study has proved that tight blood pressure (BP) regulation reduces the frequency of micro- and macrovascular endpoint. It has been suggested that combined lipid lowering with statins and tight BP regulation can have an additive effect in DM patients.

It is well established that the atherosclerotic process has an impact on endothelial function.An improvement of endothelial function by cholesterol lowering and BP reduction may serve as a surrogate endpoint for CAD.

Objective:To assess the effect of intensive lipid lowering on endothelial function in patients with DM and serum cholesterol level <6.5 mmol/l and to evaluate the effect of combined lipid lowering and tight BP regulation on endothelial function in the same patient group.

Methods: This is a single-center, randomised, placebo-controlled study with three treatment arms. Participants are blindly allocated to: 1. atorvastatin 80 mg daily 2. corresponding placebo 3. open label treatment with atorvastatin 80 mg daily and tight BP regulation with 5-10 mg amlodipine, 2-4 mg perindopril, 4-8 mg doxazosin in mono- or combination therapy that aims BP <130/80.

Endothelial function is evaluated at baseline, at 6 and 12 month non-invasively. A high resolution ultrasound scan is performed on the right brachial artery to assess post ischemic flow mediated changes in arterial diameter. Flow mediated dilatation (FMD) depends on an intact endothelium and is mediated via endogenous nitric oxid (NO). To test non-endothelium dependent vasodilatation 0.4 mg of sublingual nitroglycerin (NG) is administrated. NG is a smooth muscle relaxant and acts as a source of NO.There is a well described relation tween endothelial function in the coronary arteries and in the brachial artery.

Sample size: the sample size in the study is based on the following assumptions:

  1. High resolution ultrasound technique has a high accuracy and reproducibility.
  2. The majority of the patients will have endothelial dysfunction
  3. As shown in previous clinical studies, an increase in FMD of 2% is significant at the 95% confidence interval.
  4. Patients randomised to atorvastatin will after one year treatment show an improvement of FMD of at leat 2% compared with the placebo group. Patients treated openly with atorvastatin and BP regulation will have a further improvement of FMD of 2%.

Under these assumptions with a power of 80% and a 2 sided alfa of 5% a sample size of 160 patients are needed.

  Eligibility

Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria:

  • Type 2 diabetes mellitus,
  • Total cholesterol <6.5 mmol/l
  • Signed informed consent

Exclusion Criteria:

  • Documented CAD or peripheral vascular disease
  • Treatment with lipid-lowering drugs
  • Contraindications to HMG-CoA reductase therapy
  • Potential noncompliance
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT00124397

Locations
Denmark
Department of Medical Research
SHF Svendborg, Svendborg, Denmark, 5700
Sponsors and Collaborators
University of Southern Denmark
Pfizer
Investigators
Study Chair: Kenneth Egstrup, MD Department of Medical Research, SHF Svendborg
  More Information

No publications provided

ClinicalTrials.gov Identifier: NCT00124397     History of Changes
Other Study ID Numbers: 20000084, 2162
Study First Received: July 26, 2005
Last Updated: August 4, 2005
Health Authority: Denmark: Danish Medicines Agency

Additional relevant MeSH terms:
Diabetes Mellitus
Diabetes Mellitus, Type 2
Endocrine System Diseases
Glucose Metabolism Disorders
Metabolic Diseases
Atorvastatin
Anticholesteremic Agents
Antimetabolites
Enzyme Inhibitors
Hydroxymethylglutaryl-CoA Reductase Inhibitors
Hypolipidemic Agents
Lipid Regulating Agents
Molecular Mechanisms of Pharmacological Action
Pharmacologic Actions
Therapeutic Uses

ClinicalTrials.gov processed this record on October 23, 2014