Disease Pathogenesis and Natural History of Lipid Disorders
National Heart, Lung, and Blood Institute (NHLBI)
Summary
This study will evaluate people with dyslipidemias - disorders that affect the fat content in the blood. Fats, or lipids, such as cholesterol and triglycerides, are carried in the blood in particles called lipoproteins. These particles are involved in causing blood vessel diseases that can lead to conditions like atherosclerosis (hardening of the arteries) or heart attack. Participants will undergo accepted medical tests and procedures to evaluate their condition. Most of the test results are helpful in making a diagnosis and in guiding treatment. People with lipid disorders are eligible for this study. Representative types of patients include those with: * Plasma cholesterol levels greater than 200 mg/dl or less than 120 mg/dl * Plasma LDL-C levels greater than 130 mg/dl or less than 70 mg/dl * Plasma HDL-C levels greater than 70 mg/dl or less than 25 mg/dl * Unusual cholesterol deposits or xanthomas (nodules of lipid deposits on the skin) Children under 2 years of age are excluded from the study. Participants will undergo some or all of the following procedures: \- Plasma evaluation. Apolipoproteins (plasma proteins involved in metabolism of cholesterol, triglycerides, phospholipids, and proteins in the blood) and enzymes involved in lipid metabolism are measured....
Description
The lipoprotein transport system is vital to the delivery of the hydrophobic fats that are carried in the aqueous environment of the blood. The lipoprotein particles that comprise this system are polydisperse and contain triglycerides, free and esterified cholesterol, phospholipids and proteins. Inborn errors in the lipoprotein transport system lead to alterations in both the steady state concentrations of the various lipoproteins and in the metabolism of these particles. These inborn errors lead to both hyperlipoproteinemia and hypolipoproteinemia. Profound changes in the ambient lipoprotein…
Eligibility
- Age range
- 2–100 years
- Sex
- All
- Healthy volunteers
- No
* INCLUSION CRITERIA: * Children \>= 2 years of age and \>12 kg and adults * Dyslipidemia subjects of interest the group The following is a representative list of the types of patient presentations with dyslipidemia and potential diagnoses eligible for this protocol: * Plasma cholesterol levels \>200 mg/dl or \<120 mg/dl includes patients with diagnoses such as familial hypercholesterolemia, familial combined hyperlipidemia, sitosterolemia, lipoprotein lipase, hepatic lipase or apo-CII deficiency, and dysbetalipoproteinemia. * Plasma LDL-C levels \>130 mg/dl or \<70 mg/dl includes patients w…
Location
- National Institutes of Health Clinical CenterBethesda, Maryland