A Phase 1 Study to Evaluate Effects of Sapropterin Dihydrochloride on QTc Intervals in Healthy Adult Subjects
Sapropterin dihydrochloride (subsequently referred to as sapropterin) (Kuvan®) was approved by the FDA for the treatment of hyperphenylalaninemia in 2007. Preclinical and clinical studies and post-marketing surveillance have not demonstrated any specific cardiovascular concerns with sapropterin (Kuvan®). Nonetheless, nonantiarrhythmic drugs may have the potential to prolong QT interval, leading to potentially fatal ventricular tachycardias, including torsades de pointes. As part of the post-marketing commitment, a thorough QT/QTc study will be conducted according to ICH guidelines.
Allocation: Randomized, Endpoint Classification: Safety Study, Intervention Model: Crossover Assignment, Masking: Double Blind (Subject, Caregiver, Investigator), Primary Purpose: Treatment
PRACS Institute, Ltd.
Results (where available)
- Source: http://clinicaltrials.gov/show/NCT00789568
- Information obtained from ClinicalTrials.gov on July 15, 2010
The primary objective of the study is to evaluate the proportion of responders [≥30% reduction from baseline in blood phenylalanine (Phe) level] to 20 mg/kg/day sapropterin dihydrochlori...
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Medical and Biotech [MESH] Definitions
A condition occurring in untreated or partially treated females with PHENYLKETONURIA when they become pregnant. This may result in damages to the FETUS, including MICROCEPHALY; MENTAL RETARDATION; congenital heart disease; FETAL GROWTH RETARDATION; and CRANIOFACIAL ABNORMALITIES. (From Am J Med Genet 1997 Mar 3;69(1):89-95)
A group of autosomal recessive disorders marked by a deficiency of the hepatic enzyme PHENYLALANINE HYDROXYLASE or less frequently by reduced activity of DIHYDROPTERIDINE REDUCTASE (i.e., atypical phenylketonuria). Classical phenylketonuria is caused by a severe deficiency of phenylalanine hydroxylase and presents in infancy with developmental delay; SEIZURES; skin HYPOPIGMENTATION; ECZEMA; and demyelination in the central nervous system. (From Adams et al., Principles of Neurology, 6th ed, p952).
An anticholesteremic agent that inhibits sterol biosynthesis in animals.
An enzyme that catalyzes the reduction of 6,7-dihydropteridine to 5,6,7,8-tetrahydropteridine in the presence of NADP+. Defects in the enzyme are a cause of PHENYLKETONURIA II. Formerly listed as EC 184.108.40.206.
An enzyme of the oxidoreductase class that catalyzes the formation of L-TYROSINE, dihydrobiopterin, and water from L-PHENYLALANINE, tetrahydrobiopterin, and oxygen. Deficiency of this enzyme may cause PHENYLKETONURIAS and PHENYLKETONURIA, MATERNAL. EC 220.127.116.11.