Fabry Disease Clinical Trial
Official title:
A Multi-Center, Open-Label, Randomized Study Evaluating the Safety and Efficacy of Three Dosing Regimens of Replagal Enzyme Replacement Therapy in Adult Patients With Fabry Disease
The purpose of this study is to compare the safety and effectiveness of various doses of Replagal in patients with cardiomyopathy due to Fabry disease.
Fabry disease is an inherited, metabolic disease caused by mutations in the GALA gene. Patients with Fabry disease accumulate a complex glycosphingolipid named globotriaosylceramide (Gb3) in various tissues and organs. All organs are affected in Fabry disease but the majority of the morbidity and mortality are caused by cardiac, renal and neurological dysfunction. Accumulation of Gb3 in the heart causes hypertrophic cardiomyopathy, valvular abnormalities, arrhythmias and infarctions. Replagal has been shown to reduce Gb3 from key tissues and organs, and stabilize renal function in patients with Fabry disease. Evidence suggests that Replagal reduces left ventricular mass (LVM) and improves midwall fractional shortening (MFS) of the heart. Left ventricular hypertrophy is a major cause of morbidity and mortality in patients with Fabry disease. This is a study of the safety and effectiveness of 3 dosing regimens of Replagal in adult patients with left ventricular hypertrophy due to Fabry disease. The primary objective of the study is to compare the effects of 2 dosing regimens of Replagal (0.2 mg/kg IV every other week and 0.2 mg/kg IV weekly) on the reduction of left ventricular mass as measured by echocardiography. The secondary objectives of this study are to compare the effects of 2 dosing regimens of Replagal (0.2 mg/kg IV every other week and 0.2 mg/kg IV weekly) on each of the following: exercise tolerance; improvement in disease-specific quality of life in heart failure patients; improvement of heart failure symptoms; magnitude of reduction in Gb3; rate of decline in renal function and improvement in the severity of proteinuria/albuminuria; and safety. An alternative treatment regimen of 0.4 mg/kg Replagal IV weekly will also be explored but without formal comparison to the 0.2 mg/kg regimens. The investigation of the safety and efficacy of the 0.4 mg/kg IV weekly regimen is a secondary objective of this study. ;
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