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Protein and Phospholipid Analysis of HDL in Patients With Very High Serum Levels of HDL-C

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. Identifier: NCT00525083
Recruitment Status : Terminated (PI left for another institution)
First Posted : September 5, 2007
Last Update Posted : April 4, 2017
Information provided by (Responsible Party):
Vanderbilt University Medical Center

Brief Summary:
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.

Condition or disease

Detailed Description:

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.

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Study Type : Observational
Actual Enrollment : 19 participants
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
Actual Study Start Date : June 2005
Actual Primary Completion Date : November 3, 2014
Actual Study Completion Date : November 3, 2014

Primary Outcome Measures :
  1. Identification of protein or phospholipid signature suggestive of dysfunctional HDL [ Time Frame: 2013-2016 ]

Biospecimen Retention:   Samples With DNA
Plasma, HDL preps, genomic DNA

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Sampling Method:   Non-Probability Sample
Study Population
Patients with HDL above 100 mg/dl and with personal or family history of early atherosclerosis

Inclusion Criteria:

  • Age > 18 years.
  • Serum HDL-C > 100 mg/dL.

Exclusion Criteria:

  • Significant history of smoking.
  • Diabetes Mellitus.
  • Severe hypertension.
  • Age > 65 years

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 identifier (NCT number): NCT00525083

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United States, Tennessee
Vanderbilt University Medical Center
Nashville, Tennessee, United States, 37232
Sponsors and Collaborators
Vanderbilt University Medical Center
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Principal Investigator: Sergio Fazio, MD, PhD Vanderbilt University
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Responsible Party: Vanderbilt University Medical Center Identifier: NCT00525083    
Other Study ID Numbers: 050806
First Posted: September 5, 2007    Key Record Dates
Last Update Posted: April 4, 2017
Last Verified: March 2017
Keywords provided by Vanderbilt University Medical Center:
low density lipoprotein
Additional relevant MeSH terms:
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Lipid Metabolism Disorders
Metabolic Diseases