Evaluation of Lipoproteins

Study Description

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Study Description Study Design Groups and Cohorts Outcome Measures Eligibility Criteria Contacts and Locations More Information

Brief Summary:

Lipoproteins are particles that carry fats such as cholesterol and triglycerides through the blood stream. These particles are involved in causing blood vessel disease that can lead to conditions like hardening of the arteries (atherosclerosis) or heart attacks (myocardial infarctions).

This study is designed to look closely at the factors affecting lipoproteins. Researchers plan to study patients and normal volunteers by measuring lipoprotein levels in the blood. Patients and volunteers will be placed on a balanced diet during the study. In addition, researchers plan to measure levels of various hormone and enzymes in the blood. Patients and volunteers participating in the study may be asked to undergo more specific tests in order to collect more information about lipoprotein metabolism.

This study may not provide direct benefits to patients and volunteers participating in it. However, information gathered from this study may help researchers develop better skills and techniques to diagnose and treat patients with diseases of lipoprotein metabolism.

Condition or disease
Hyperlipidemia; Hyperlipoproteinemia; Hypolipoproteinemia

Detailed 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 concentrations have a variety of clinical manifestations. The present study protocol is designed to permit a full evaluation of the lipids, lipoproteins, and apolipoproteins, in patients with potential genetic defects in these processes. The protocol will also permit training of students, staff clinicians, physician assistants, nurse practitioners, dieticians and post-doctoral fellows in the evaluation and treatment of patients with dyslipidemias. The study population will include patients which are referred to the Lipid Service from private care providers, academic institutions, or the NHLBI Lipid website, with any of the following potential lipid abnormalities or clinical stigmata associated with dyslipoproteinemias: a) increased plasma levels of cholesterol, triglycerides, HDL-cholesterol or LDL-cholesterol b) decreased plasma concentrations of cholesterol and HDL-cholesterol c) postprandial hyperlipidemia or d) eruptive xanthomas, xanthelasma, tuberous or tendinous xanthomas, or corneal opacities.

Study Design

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Study Type :	Observational
Estimated Enrollment :	2000 participants
Official Title:	Teaching Protocol for the Evaluation of Plasma Lipoproteins
Study Start Date :	August 6, 1979

Groups and Cohorts

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Study Description Study Design Groups and Cohorts Outcome Measures Eligibility Criteria Contacts and Locations More Information

Outcome Measures

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Study Description Study Design Groups and Cohorts Outcome Measures Eligibility Criteria Contacts and Locations More Information

Eligibility Criteria

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Study Description Study Design Groups and Cohorts Outcome Measures Eligibility Criteria Contacts and Locations More Information

Ages Eligible for Study:	Child, Adult, Senior
Sexes Eligible for Study:	All
Accepts Healthy Volunteers:	No

Criteria

• INCLUSION CRITERIA:

Plasma cholesterol levels greater than 200 mg/dl or less than 120 mg/dl - includes patients with diagnoses such as familial hypercholesterolemia, familial combined hyperlipidemia, sitosterolemia, cholesteryl ester storage disease, Erdheim chester disease, lipoprotein lipase, hepatic lipase or apo-CII deficiency, and dysbetalipoproteinemia.

Plasma LDL-C levels greater than 130 mg/dl or less than 70 mg/dl - includes patients with diagnoses such as familial hypercholesterolemia, familial combined hyperlipidemia, lipoprotein lipase, hepatic lipase, or apo-CII deficiency, sitosterolemia, dysbetalipoproteinemia, abetalipoproteinemia and hypobetalipoproteinemia.

Plasma HDL-C levels greater than 70 mg/dl or less than 25 mg/dl - includes patients with deficiency of cholesteryl ester transfer protein, lecithin cholesterol acyltransferase, phospholipid transfer protein, lipoprotein lipase, hepatic lipase, or apo-CII, and Tangier disease.

Plasma triglyceride levels greater than 150 mg/dl - includes patients with deficiency of lipoprotein lipase, hepatic lipase or apoC-II, dysbetalipoproteinemia, Type IV and Type V hyperlipidemia.

EXCLUSION CRITERIA:

Inability to provide informed consent.

Contacts and Locations

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Study Description Study Design Groups and Cohorts Outcome Measures Eligibility Criteria Contacts and Locations More Information

Contacts

Contact: Robert D Shamburek, M.D.	(301) 496-3460	bobs@mail.nih.gov

Locations

United States, Maryland
National Institutes of Health Clinical Center, 9000 Rockville Pike	Recruiting
Bethesda, Maryland, United States, 20892
Contact: For more information at the NIH Clinical Center contact Office of Patient Recruitment (OPR) 800-411-1222 ext TTY8664111010 prpl@cc.nih.gov

Sponsors and Collaborators

National Heart, Lung, and Blood Institute (NHLBI)

Investigators

Principal Investigator:	Robert D Shamburek, M.D.	National Heart, Lung, and Blood Institute (NHLBI)

More Information

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Study Description Study Design Groups and Cohorts Outcome Measures Eligibility Criteria Contacts and Locations More Information

Additional Information:

NIH Clinical Center Detailed Web Page 

Publications:

Klein HG, Duverger N, Albers JJ, Marcovina S, Brewer HB Jr, Santamarina-Fojo S. In vitro expression of structural defects in the lecithin-cholesterol acyltransferase gene. J Biol Chem. 1995 Apr 21;270(16):9443-7.

Mann WA, Lohse P, Gregg RE, Ronan R, Hoeg JM, Zech LA, Brewer HB Jr. Dominant expression of type III hyperlipoproteinemia. Pathophysiological insights derived from the structural and kinetic characteristics of ApoE-1 (Lys146-->Glu). J Clin Invest. 1995 Aug;96(2):1100-7.

Rouis M, Lohse P, Dugi KA, Lohse P, Beg OU, Ronan R, Talley GD, Brunzell JD, Santamarina-Fojo S. Homozygosity for two point mutations in the lipoprotein lipase (LPL) gene in a patient with familial LPL deficiency: LPL(Asp9-->Asn, Tyr262-->His). J Lipid Res. 1996 Mar;37(3):651-61.

Responsible Party:	National Heart, Lung, and Blood Institute (NHLBI)
ClinicalTrials.gov Identifier:	NCT00001168 History of Changes
Other Study ID Numbers:	790100; 79-H-0100
First Posted:	November 4, 1999
Last Update Posted:	March 29, 2018
Last Verified:	February 7, 2018

Keywords provided by National Institutes of Health Clinical Center (CC) ( National Heart, Lung, and Blood Institute (NHLBI) ):

Dyslipoproteinemia; Hypercholesterolemia; Hypertriglyceridemia; hypoalphalipoproteinemia	Atherosclerosis; Type III Hyperlipoproteinemia; Plasma Lipoproteins

Additional relevant MeSH terms:

Hyperlipidemias; Hyperlipoproteinemias; Hypolipoproteinemias; Dyslipidemias; Lipid Metabolism Disorders	Metabolic Diseases; Lipid Metabolism, Inborn Errors; Metabolism, Inborn Errors; Genetic Diseases, Inborn