We updated the design of this site on December 18, 2017. Learn more.
ClinicalTrials.gov
ClinicalTrials.gov Menu

Does a Seven Day Treatment With Dipyridamole Induce Protection Against Ischemia-Reperfusion Injury?

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.
ClinicalTrials.gov Identifier: NCT00457405
Recruitment Status : Completed
First Posted : April 6, 2007
Last Update Posted : April 15, 2008
Sponsor:
Information provided by:

Study Description
Brief Summary:
This study is performed to determine whether a seven day treatment with dipyridamole (slow release, 200mg twice daily) can induce a protective effect against ischemia-reperfusion injury, after ischemic exercise of the non-dominant forearm in healthy volunteers.

Condition or disease Intervention/treatment Phase
Ischemia-Reperfusion Injury Atherosclerosis Drug: dipyridamole Phase 4

Detailed Description:

Rationale:

Dipyridamole increases the endogenous adenosine level by inhibition of the nucleoside transporter (ENT-1). Activation of the adenosine receptor protects against ischemia-reperfusion injury (pharmacologic preconditioning).

The purpose of this project is to explore whether a seven day treatment with dipyridamole can reduce ischemia-reperfusion injury in the forearm, in a randomized double blind placebo controlled trial.

Study design:

Randomized double-blind placebo-controlled trial with a cross-over design.

Study population:

Healthy male volunteers, aged 18-50 yr

Intervention:

10 Volunteers will be randomised to receive in a cross-over design either a 7 day treatment with dipyridamole (Persantin retard; 200 mg twice daily) or placebo followed by 10 minutes of ischemic isometric muscle contraction of the non-dominant forearm and upon reperfusion infusion of radiolabeled Annexin A5 (Annexin scintigraphy).

Main study parameters/endpoints:

Percentage difference in radioactivity (counts/pixel) between experimental and control thenar muscle at 60 and 240 minutes after reperfusion.

Nature and extent of the burden and risks associated with participation, benefit and group relatedness:

This study will be executed at the Clinical Research Centre Nijmegen under close medical supervision. Treatment with dipyridamole is not expected to harm the volunteers. During the first days of treatment with dipyridamole, a headache may occur. Ischemic hand gripping will temporarily result in pain in the forearm. This is completely reversible upon reperfusion. Administration of radiolabeled Annexin A5 results in an effective dose of less than 5 mSv, well within the range of accepted exposure to radioactivity for human research. Participation in this research does not interfere with possible diagnostic or therapeutic procedures with X-rays of radioactivity in the future.

Occurrence of an allergic reaction is theoretically possible upon administration of Annexin A5, however there have been no allergic reactions reported in all volunteers exposed to Annexin A5.

The volunteers will not benefit directly from participating in this study.


Study Design

Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 10 participants
Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: Does a Seven Day Treatment With Dipyridamole Induce Protection Against Ischemia-Reperfusion Injury?
Study Start Date : June 2007
Primary Completion Date : October 2007
Study Completion Date : March 2008

Resource links provided by the National Library of Medicine

U.S. FDA Resources

Arms and Interventions

Arm Intervention/treatment
Active Comparator: 1
first 7 day treatment with dipyridamol and at least two weeks later 7 day treatment with placebo
Drug: dipyridamole
dipyridamole 200mg twice daily
Other Name: persantin
Active Comparator: 2
first 7 day treatment with placebo and at least two weeks later 7 day treatment with atorvastatin
Drug: dipyridamole
dipyridamole 200mg twice daily
Other Name: persantin


Outcome Measures

Primary Outcome Measures :
  1. Percentage difference in radioactivity (counts/pixel) between experimental and control thenar muscle at 60 and 240 minutes after reperfusion. [ Time Frame: 60 and 240 minutes after reperfusion ]

Secondary Outcome Measures :
  1. Plasma dipyridamole concentration [ Time Frame: in the morning of day seven of treatment ]
  2. Workload (duration of exercise and developed force) [ Time Frame: during 10 minutes ischemic exercise ]
  3. Heart rate (preceded by a 7day treatment of dipyridamol or placebo) [ Time Frame: during 30 minutes at day seven of treatment with dipyridamol and placebo ]

Eligibility Criteria

Information from the National Library of Medicine

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, Learn About Clinical Studies.


Ages Eligible for Study:   18 Years to 50 Years   (Adult)
Sexes Eligible for Study:   Male
Accepts Healthy Volunteers:   Yes
Criteria

Inclusion Criteria:

  • Male
  • age between 18-50yr.

Exclusion Criteria:

  • cardiovascular disease
  • hypertension (systole > 140 mmHg, diastole > 90 mmHg)
  • hypercholesterolemia (fasting total cholesterol > 5.5 mmol/l or not fasting total cholesterol > 6.5mmol/L)
  • diabetes mellitus (fasting glucose > 7.0 mmol/L or random glucose > 11.0 mmol/L)
  • asthma (recurrent episodes of dyspnea and wheezing, or usage of prescribed inhalation medication: i.e. corticosteroids or B2-agonists)
  • participation in any clinical trial during the last 60 days prior to this study.
  • administration of any radioactivity for research purposes during the last 5 years prior to this study.
  • concomitant medication
Contacts and Locations

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 ClinicalTrials.gov identifier (NCT number): NCT00457405


Locations
Netherlands
Radboud University Nijmegen Medical Centre
Nijmegen, Netherlands, 6500HB
Sponsors and Collaborators
Radboud University
Investigators
Principal Investigator: G Rongen, MD PhD RUNMC
More Information

Publications:
Responsible Party: G Rongen, dept Pharmacology Toxicology
ClinicalTrials.gov Identifier: NCT00457405     History of Changes
Other Study ID Numbers: dipy003
First Posted: April 6, 2007    Key Record Dates
Last Update Posted: April 15, 2008
Last Verified: April 2008

Keywords provided by Radboud University:
ischemia-reperfusion injury
atherosclerosis
dipyridamole
annexin A5 targeting

Additional relevant MeSH terms:
Wounds and Injuries
Ischemia
Atherosclerosis
Reperfusion Injury
Pathologic Processes
Arteriosclerosis
Arterial Occlusive Diseases
Vascular Diseases
Cardiovascular Diseases
Postoperative Complications
Dipyridamole
Phosphodiesterase Inhibitors
Enzyme Inhibitors
Molecular Mechanisms of Pharmacological Action
Platelet Aggregation Inhibitors
Vasodilator Agents