Protein and Phospholipid Analysis of HDL in Patients With Very High Serum Levels of HDL-C
Coronary heart disease (CHD) is the single leading cause of death in the United States . Serum Cholesterol is known to have a direct impact on a number of human diseases through a variety of mechanisms. This is particularly true of cardiovascular disease. Measurement and manipulation of serum cholesterol has become a primary focus of primary care physicians and cardiologists when attempting to reduce risk of heart disease.
|Study Design:||Observational Model: Case-Only
Time Perspective: Cross-Sectional
|Official Title:||Protein and Phospholipid Analysis of HDL in Patients With Very High Serum Levels of HDL-C|
- Identification of protein or phospholipid signature suggestive of dysfunctional HDL [ Time Frame: 2013-2016 ] [ Designated as safety issue: No ]
Biospecimen Retention: Samples With DNA
Plasma, HDL preps, genomic DNA
|Study Start Date:||June 2005|
|Estimated Study Completion Date:||June 2016|
|Estimated Primary Completion Date:||December 2015 (Final data collection date for primary outcome measure)|
Clinical investigations have shown that lowering the "total serum cholesterol" levels result in a significant reduction of coronary artery disease and myocardial infarctions . Thus, interventions to lower the "total serum cholesterol" are commonly employed by medical professionals - this includes behavioral modifications (exercise, dieting, and weight loss) and pharmacological interventions.
Investigation has shown that clinical outcomes do not only rely on "total serum cholesterol". "Total serum cholesterol" is comprised of multiple subtypes - most notable are "HDL Cholesterol" and "LDL cholesterol". Analysis of the data has shown that high levels of LDL cholesterol predict higher rates of cardiovascular events, while high levels of HDL cholesterol are actually predictive of significantly less cardiovascular events. These effects are independent of other cardiovascular risk factors .
The mechanism by which LDL cholesterol results in heart disease has been intensely investigated and elucidated. Numerous drugs are now approved and utilized by physicians to lower the LDL cholesterol of patients to prevent primary and secondary cardiovascular disease.
Epidemiological data show that low levels of HDL-C place individuals at higher risk for coronary artery disease while high levels of HDL-C actually decrease an individual's risk . The mechanism behind this risk reduction remains unclear and is likely multi-factorial. Furthermore, some data suggests that while HDL-C is important in risk reduction, it is not necessarily the measured serum level of HDL-C, but also the composition, oxidation state, metabolism of the HDL-C that determines an individual's cardiac risk . Understanding of this mechanism could lead to potential therapeutic targets as well as clinically relevant diagnostic testing.
Please refer to this study by its ClinicalTrials.gov identifier: NCT00525083
|United States, Tennessee|
|Vanderbilt University Medical Center|
|Nashville, Tennessee, United States, 37232|
|Principal Investigator:||Sergio Fazio, MD, PhD||Vanderbilt University|