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The objective of the study is to determine whether Kuvan™ (sapropterin) improves the strength of the functional connectivity between brain regions in individuals with PKU.
The proposed study is designed to evaluate the hypothesis that functional connectivity may represent an early marker for neurocognitive improvements related to Kuvan treatment. As a first step in the study, 20 patients with PKU who are ≥ 6 years of age will receive baseline functional connectivity magnetic resonance imaging (fcMRI) evaluations before being treated with Kuvan™. Response to Kuvan™ will be monitored for 4 weeks. At the end of 4 weeks, response to Kuvan™ will be reviewed and all 20 patients will receive follow-up fcMRI evaluations. Fifteen patients with a reduction of ≥ 20% in blood phenylalanine will continue in the study and receive a third fcMRI evaluation at the end of 6 months of treatment with Kuvan™. For comparison purposes and to control for possible practice effects in repeated testing, a matched control group of 20 healthy individuals without PKU will used. All 20 of the control subjects will receive baseline and 4-week fcMRI evaluations; fifteen will receive a 6-month evaluation.
Observational Model: Case Control, Time Perspective: Prospective
University of Missouri
Enrolling by invitation
University of Missouri-Columbia
Published on BioPortfolio: 2014-08-27T03:19:50-0400
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...
Sapropterin dihydrochloride (subsequently referred to as sapropterin) (Kuvan®) was approved by the FDA for the treatment of hyperphenylalaninemia in 2007. Preclinical and clinical studies...
The purpose of this study is to determine whether improvements in behavior occur in children with phenylketonuria (PKU) who are taking Kuvan.
The investigators will investigate the effect of blood phenylalanine on Kuvan responsiveness in the same patients with PKU when their blood phenylalanine concentrations are altered by diet...
The objective of this study is to evaluate the safety of long-term treatment with Kuvan.
Phenylketonuria (PKU) has a very high prevalence throughout the world. Nowadays, number of studies about impact of this metabolic disease on patients increasing. The aim of our study is to examine PKU...
In May 2018, the United States Food and Drug Administration approved pegvaliase-pqpz (Palynziq*), the first enzyme substitution therapy for the treatment of phenylketonuria (PKU). This article provide...
Phenylketonuria (PKU) is the most common form of amino acid metabolism disorders with autosomal recessive inheritance. The brain damage can be prevented by early diagnosis and a phenylalanine-restrict...
Phenylketonuria is an inherited disease caused by mutations in the phenylalanine hydroxylase gene PAH. Different PAH pathogenic variants occur in different ethnic groups with various frequencies and t...
The genetic disorder phenylketonuria (PKU) is the inability to metabolize phenylalanine because of a lack of the enzyme phenylalanine hydroxylase. Phenylalanine is used to biochemically form proteins,...
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 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 22.214.171.124.
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 126.96.36.199.
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