View clinical trials related to Metabolism, Inborn Errors.
Filter by:This study will test the safety and effectiveness of 40 mg of ezetimibe (Zetia ) daily in lowering blood levels of cholesterol and of the plant sterols sitosterol and campesterol in patients with homozygous sitosterolemia, an inherited disorder of sterol metabolism. (Sterols are alcohol substances found in animal and plant fats.) In this disorder, an excess of many plant sterols is absorbed and not enough excreted. Patients can develop atherosclerosis and coronary heart disease as early as childhood, as well as other problems including arthritis, arthralgia, and tendon xanthomas (lipid deposits). Current treatment consists of ezetimibe 10 mg, dietary restriction of plant and shellfish sterols, and bile salt binding resins. Ezetimibe is a cholesterol-lowering drug that inhibits intestinal absorption of cholesterol and structurally related plant sterols across the intestinal wall. Patients with homozygous sitosterolemia who are between 18 and 85 years of age have completed NHLBI's 1-year study of ezetimibe at 10 mg a day may be eligible for this study. All participants maintain their current stable diet and take a 10-mg pill of ezetimibe daily for 26 weeks. They are also randomly selected to take either an additional 30-mg pill of ezetimibe or a placebo (look-alike pill with no active ingredients). Patients fast for at least 12 hours before each of 6 visits scheduled during the course of the study. At these visits, patients undergo some or all of the following procedures for monitoring their health and evaluating their response to treatment: - Medical history and review of medications - Physical examination - Measurement of vital signs (pulse rate, blood pressure, breathing rate and temperature) - Review of dietary maintenance - Measurements of height, weight, and waist circumference - Measurement (with ruler) and photographs of non-Achilles xanthoma - X-ray of Achilles tendon - Blood draw and urine collection - Pregnancy test for women of childbearing potential
This is a 6-month study with patients who have the rare disease, sitosterolemia which may result in heart-related diseases. These patients have unusually high absorption of non-cholesterol sterols, resulting in heart-related diseases. This study investigates whether absorption of these non-cholesterols can be reduced in these patients.
This is an extension study for patients having unusually high absorption of non-cholesterol sterols, resulting in heart-related diseases. This study will evaluate the long term safety and the ability to lower cholesterol levels with an investigational drug.
This is an extension study for patients having unusually high absorption of non-cholesterol sterols, resulting in heart-related diseases. This study will evaluate the long term safety and the ability to lower cholesterol levels with an investigational drug.
OBJECTIVES: I. Determine the safety of total body irradiation and fludarabine followed by allogeneic peripheral blood stem cell or bone marrow transplantation in combination with cyclosporine and mycophenolate mofetil for establishing mixed chimerism in patients with inherited disorders. II. Determine whether this regimen can establish mixed chimerism in these patients. III. Determine whether mixed chimerism is sufficient to reverse disease symptoms in these patients. IV. Determine the safety of donor lymphocyte infusions to eliminate persistent disease in these patients with mixed chimerism.
OBJECTIVES: I. Determine whether plasma choline and breast milk choline levels are low at fasting in a patient with methionine adenosyltransferase deficiency, and if the choline levels are low, determine whether choline levels respond to dietary supplementation with phosphatidylcholine. II. Determine whether this patient has a fatty liver by magnetic resonance spectroscopy.
OBJECTIVES: I. Determine the phenotypic heterogeneity of patients with genetic disorders including their clinical spectrum and natural history. II. Develop and evaluate novel methods for the treatment of genetic disorders including metabolic manipulation, enzyme manipulation, enzyme replacement, enzyme transplantation, and gene transfer techniques in these patients. III. Develop and evaluate methods for the prenatal diagnosis of genetic disorders using improved cytogenetic, biochemical, and nucleic acid techniques and amniotic fluid cells or chorionic villi in these patients.
OBJECTIVES: I. Assess the safety and efficacy of sodium phenylbutyrate, sodium benzoate, sodium phenylacetate, and dietary intervention in patients with urea cycle disorders.
OBJECTIVES: I. Evaluate the efficacy of oral ribose in patients with a complex 5'-nucleotidase syndrome who have not received uridine (UR) and thymidine (TDR). II. Evaluate the efficacy of UR/oral ribose and UR/TDR. III. Evaluate the efficacy of oral ribose given in combination with UR/TDR.
OBJECTIVES: I. Identify the genetic defect and fine map the gene that causes sitosterolemia.