Brief Title
Statin Use in Abdominal Aortic Aneurysm Repair
Official Title
Randomised Controlled Trial of Effect of Pre-operative Statin Use on Matrix Metalloproteinases (MMP) & Tissue Inhibitors of Matrix Metalloproteinases (TIMP) in Abdominal Aortic Aneurysm (AAA).
Brief Summary
Aneurysm formation is associated with a chronic inflammatory response, depletion of smooth muscle cell population and excessive matrix metalloproteinases (MMPs) production. 3-hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) reductase inhibitors (statins) are lipid lowering agents with pleiotropic effects including anti-inflammatory activity. Elective open AAA repair patients will be randomised to receive either statin (Atorvastatin 80 mg) or placebo (dummy tablet) for 4 weeks pre-operatively. Tissue samples will be obtained from patient's aneurysm to assess MMP's and their inhibitors TIMP's. It is hypothesized that patients receiving statin will have reduced MMP's.
Detailed Description
All patients listed for elective open AAA repair will be screened for suitability to participate within the study. In this double blind randomized control trial patients will be recruited through vascular surgical outpatient clinics. After inclusion, informed consent and evaluation of base line characteristics patients will be given a prescription for study medication. This prescription was exchanged by the patient for medication at the hospital pharmacy. Randomization will be carried out by pharmacy with computer generated sequence with a sub group size of 4. This will ascertain the order of prescribed drug/ placebo. Pharmacy then dispensed the drug/ placebo in this order. Drug used will be Atorvastatin 80 mg, white, elliptical, film coated tablets debossed '80' on one side and 'PD 158' on the other side. The placebo is similar in shape and colour. Drug/ placebo will be given for 4 weeks pre-operatively. Full thickness infrarenal aortic samples will obtained at time of operation and the exact sample site will be recorded. Samples will be washed with 0.9% saline to remove blood and clots, snap-frozen and stored at -80C for subsequent MMP 2, 8 and 9 and TIMP 1 and 2 analyses.
Study Phase
Phase 4
Study Type
Interventional
Primary Outcome
The primary outcome measure was the level of MMP-9 in aortic wall samples of patients on statins and placebo.
Secondary Outcome
The secondary outcome measures were the levels of MMP-2, MMP-8, TIMP-1, TIMP-2 and the variation in areas of peak wall stress due to statins.
Condition
Abdominal Aortic Aneurysm
Intervention
Atorvastatin
Study Arms / Comparison Groups
Placebo
Description:
Publications
* Includes publications given by the data provider as well as publications identified by National Clinical Trials Identifier (NCT ID) in Medline.
Recruitment Information
Recruitment Status
Drug
Estimated Enrollment
40
Start Date
January 2005
Completion Date
December 2008
Primary Completion Date
June 2008
Eligibility Criteria
Inclusion Criteria: - Patient with an AAA >5.5cm diameter listed for open AAA repair at least 3 weeks from screening attendance. Exclusion Criteria: - Patients already on statin, - inability to provide informed written consent, - contraindication to statin (intrinsic liver disease, - chronic alcohol abuse, impaired renal function, unstable hypothyroidism, - unexplained muscle aches, hypersensitivity to atorvastatin or any of its components), - previous unilateral or bilateral lower limb amputation and concomitant use of fibrates, - erythromycin, - immunosuppressive drugs, - antifungal drugs or lipid lowering drugs.
Gender
All
Ages
20 Years - N/A
Accepts Healthy Volunteers
No
Contacts
Ian C Chetter, MBChB, FRCS, ,
Location Countries
United Kingdom
Location Countries
United Kingdom
Administrative Informations
NCT ID
NCT01062802
Organization ID
CB/EL/R0135
Study Sponsor
University of Hull
Study Sponsor
Ian C Chetter, MBChB, FRCS, Principal Investigator, Hull Royal Infirmary, Hull, United Kingdom.
Verification Date
December 2007