Pilot Study of Lovaza (Omega 3 Fatty Acids) to Improve Cardiac Antioxidant/Anti-inflammatory Profile Before Cardiac Surgery
In the absence of treatment, severe mitral valve regurgitation (MR) results in left atrium (LA) dilatation and hypertrophy, followed ultimately by left ventricular dysfunction and heart failure. One promising intervention for the prevention of the deleterious effects of pressure overload-induced cardiac hypertrophy and heart failure is dietary supplementation with n-3 polyunsaturated fatty acids (PUFAs). However, the molecular targets and mechanisms by which n-3 PUFAs exert their effects are not completely defined. A possible target of n-3 PUFAs is the mitochondrial membrane which has broad implications given that mitochondrial dysfunction and altered metabolism have been associated with cardiac hypertrophy and heart failure. The investigators have recently identified significant mitochondrial dysfunction in the LA of patients with severe MR, as compared to their non-hypertrophied right atrium (RA). However, the investigators have not addressed the possibility that intervention with purified n-3 PUFAs (Lovaza) could improve mitochondrial function. From a mechanistic perspective, the investigators have observed in vitro that n-3 PUFAs accumulate predominately into the mitochondrial membrane of cardiomyocytes where the investigators believe they exert their effects on the biophysical organization of the membrane. Therefore, the CENTRAL HYPOTHESIS is that administering Lovaza to patients with severe MR will reduce apoptosis and improve mitochondrial function in LA (Aim 1). This change in mitochondrial function will be driven by significant biochemical and biophysical remodeling of the mitochondrial membrane (Aim 2).
Mitral Valve Regurgitation
Left Atrium Dilatation and Hypertrophy
Mitochondrial Dysfunction in the Heart
Drug: Lovaza group
|Study Design:||Allocation: Non-Randomized
Endpoint Classification: Efficacy Study
Intervention Model: Parallel Assignment
Masking: Open Label
Primary Purpose: Supportive Care
|Official Title:||Mitigating Cardiac Inflammation and Oxidative Stress in Atrial Myocardium Via Short-term Lovaza Treatment Prior to Surgery|
- Specific Aim 1: To determine if Lovaza treatment reduces markers of inflammation and improves mitochondrial function in atrial myocardium [ Time Frame: 15 months ] [ Designated as safety issue: No ]
- Specific Aim 2: To determine if Lovaza treatment alters the biophysical and biochemical organization of cardiac mitochondrial membranes. The following questions will be addressed using the blood and cardiac tissue samples collected as described above: [ Time Frame: 15 months ] [ Designated as safety issue: No ]
|Study Start Date:||January 2010|
|Estimated Study Completion Date:||December 2013|
|Estimated Primary Completion Date:||October 2013 (Final data collection date for primary outcome measure)|
No Intervention: No treatment
This is the group of patients that will not undergo any treatment with Lovaza prior to mitral valve repair surgery. This is the 'control' group.
Active Comparator: Lovaza treated
This arm will be the group of patients that will be treated with Lovaza prior to undergoing mitral valve repair surgery.
Drug: Lovaza group
Patients who are scheduled for mitral valve repair surgery at least 3 weeks removed from the initial consult will be recruited to take 4 capsules of Lovaza (omega 3 fatty acids) daily, for 3 weeks prior to their surgery.
Other Name: omega 3 fatty acid esters
|United States, North Carolina|
|Brody School of Medicine|
|Greenville, North Carolina, United States, 27834|
|Principal Investigator:||Ethan J Anderson, PhD||Assistant Professor, Department of Pharmacology and Toxicology, East Carolina University|