Finding studies
Finding studies
Take this into the appointment.
Saves the questions and what to expect into your notes, next to the visit they belong to.
Lead
National Heart, Lung, and Blood Institute (NHLBI)
Homozygous sitosterolemia is an autosomally inherited recessive disorder of sterol metabolism. Patients with homozygous sitosterolemia can present with accelerated atherosclerosis with initial CHD events occurring in childhood. In addition, these patients can have tendon xanthomas, hemolytic episodes, as well as arthritis and arthralgias. Plasma levels of sitosterol and other dietary sterols are markedly elevated in homozygous sitosterolemic patients, and are diagnostic of this disorder. A low sterol diet provides only limited reduction in sitosterol levels and currently available medical treatments, such as bile salt binding resins, are usually insufficiently effective or poorly tolerated. SCH-58235 is a member of a new class of therapeutic agents, specific cholesterol absorption inhibitors, being developed to treat hypercholesterolemia. Preclinical animal studies and clinical studies in humans have demonstrated significant reductions in serum cholesterol levels with SCH-58235 treatment. In the current study, the efficacy and safety of SCH-58235 will be studied in patients with homozygous sitosterolemia, an inherited condition in which a wide range of plant sterols, including sitosterol, are excessively absorbed and inadequately excreted, leading to dramatic increases in tissue deposition. SCH-58235 may lower sitosterol levels by directly inhibiting sitosterol absorption (since plant sterols and cholesterol are structurally similar sterols) and/or by inhibiting cholesterol absorption and indirectly by increasing hepatic uptake of plasma LDL with increased cholesterol and sitosterol excretion. These mechanisms of action could lead to reductions in both plant sterol and LDL cholesterol levels in these patients, thereby providing important clinical benefits. The current study will determine if SCH-58235 will be safe and well tolerated and provide significant reductions in plant sterols (plasma sitosterol and campesterol) and low-density lipoprotein-cholesterol (LDL-C) concentrations in patients with homozygous sitosterolemia. This is a multicenter, randomized, double-blind, placebo-controlled study lasting 12 weeks. Patients with a diagnosis of homozygous sitosterolemia who have an elevated plasma sitosterol level on their current regimen will be studied. Patients will be eligible to enroll in the study whether their current regimen is medication(s), surgical (prior ileal bypass), apheresis, a combination of treatments, or no active regimen. The primary objective of this study is to evaluate the efficacy and safety of 10 mg/day of SCH-58235 in patients with homozygous sitosterolemia who continue to have an elevated plasma sitosterol level.
Age
Any age
Sex
ALL
Healthy volunteers
Not accepted
