Clinical Trial: Cardiovascular Evaluation of Patients with High Cholesterol and Normal Volunteers
This study is currently recruiting patients.
Homozygous familial hypercholesterolemia is a rare inherited disease of metabolism. It occurs in less than 1 in 1 million people within the United States. Patients with the disease are typically children and young adults who develop heart disease early in life. Children less than age 5 years with this disease have suffered heart attacks and death.
The normal process that removes cholesterol particles from the blood stream does not work in patients with this disease. It causes cholesterol to build-up in the arteries and leads to hardening of the arteries (atherosclerosis).
The goal of this study is to detect and measure atherosclerosis in these patients before it becomes permanent and potentially life threatening. Patients with this disease can participate in this study. Researchers plan to evaluate patients with homozygous familial hypercholesterolemia using new and standard methods for detecting atherosclerosis.
MedlinePlus related topics: Cholesterol; Vascular Diseases
Study Type: Observational
Study Design: Natural History
Official Title: Cardiovascular Evaluation of Patients with Familial Hypercholesterolemia and Normal Individuals
Expected Total Enrollment: 95
Study start: May 28, 1985
Familial hypercholesterolemia is an autosomal co-dominant disorder resulting in abnormal LDL receptor function, profoundly elevated concentrations of low density lipoproteins, accelerated atherosclerosis and death by early adulthood. This disease is heterogeneous in both the degree of LDL receptor dysfunction as well as the age of death. Liver transplantation has been demonstrated to virtually normalize plasma lipoprotein concentrations in homozygous FH and the recent cloning of a functional LDL receptor gene holds promise in the definitive treatment of this condition. We propose performing longitudinal sequential cardiologic studies utilizing noninvasive techniques in homozygous patients with well-characterized LDL receptor defects. Sequential cardiovascular study of these patients will not only characterize the progression of atherosclerosis heart disease in this disease, it may also permit the identification of individuals with would be likely to benefit from liver transplantation and/or genetic engineering.
Genders Eligible for Study: Both
Accepts Healthy Volunteers
Fasting cholesterol greater than 500 mg/dl, low density lipoprotein cholesterol greater than 400 mg/dl, and triglycerides less than mg/dl.
Family history of hypercholesterolemia and/or cardiovascular disease before the age of 60 years.
Tendinous and tuberous xanthomas.
Arcus corneae before the age of 30.
Location and Contact Information
National Heart, Lung and Blood Institute (NHLBI), 9000 Rockville Pike, Bethesda, Maryland, 20892, United States; Recruiting
Detailed Web Page
Hoeg JM. Familial hypercholesterolemia. What the zebra can teach us about the horse. JAMA. 1994 Feb 16;271(7):543-6. No abstract available.
Sprecher DL, Hoeg JM, Schaefer EJ, Zech LA, Gregg RE, Lakatos E, Brewer HB Jr. The association of LDL receptor activity, LDL cholesterol level, and clinical course in homozygous familial hypercholesterolemia. Metabolism. 1985 Mar;34(3):294-9.
Schmidt HH, Hill S, Makariou EV, Feuerstein IM, Dugi KA, Hoeg JM. Relation of cholesterol-year score to severity of calcific atherosclerosis and tissue deposition in homozygous familial hypercholesterolemia. Am J Cardiol. 1996 Mar 15;77(8):575-80.
Record last reviewed: May 7, 2004
Last Updated: November 23, 2004
Record first received: November 3, 1999
ClinicalTrials.gov Identifier: NCT00001204
Health Authority: United States: Federal Government
ClinicalTrials.gov processed this record on 2005-04-08
Cache Date: April 8, 2005