Active clinical trials for "Phenylketonurias"

The purpose of this study is to determine if taking supplemental DHA improves measures of processing speed and executive function in teen and adult women with PKU.

Thirty eligible PKU patients (≥ 8 years), identified as tablet protein substitute users, will be recruited. Patients will firstly observe a 7-day baseline period, in which participants will continue with their existing diet, protein substitute and multi vitamin prescription. Patients will then receive the phaenylalanine-free protein substitute tablets daily for 28 days in addition to appropriate nutritional management. The aim of this prospective, single arm trial is to evaluate the acceptability (compliance, tolerance and palatability) of the phenylalanine-free protein substitute tablets in patients with proven PKU. The primary outcome measure is compliance, with secondary outcome measures of gastrointestinal tolerance, acceptability, blood amino acids, dietary intake, anthropometry and safety.

This is a study for adults and children ≥ 14 years old who have Phenylketonuria (PKU) with uncontrolled plasma Phe levels. No clinical intervention or study drug is provided by BioMarin in this study.

To date, oxidative stress in PKU has been evaluated only with fragmented approaches.The aim of the present study is to investigate oxidative stress in PKU with more comprehensive methods.The relationship between oxidative stress and metabolic disturbances (hyperPhenylalaninemia) will also be studied.

The aim of this study is to demonstrate that a new protein substitute is acceptable and well tolerated in children with PKU.

The 165-901 study is designed to identify the appropriate tools for use in future interventional studies on the neurocognitive effects of pegvaliase on adults with PKU.

Phenylketonuria (PKU) is a genetic disorder known to cause severe reduction in intelligence and deficits in cognitive function; it is associated with an elevated level of Phenylalanine (Phe) in blood. Newborn screening and early treatment with restricted protein diet supplemented by a formula of amino-acids will preserve intelligence. In those with the severe form treated from birth, some deficits that affect higher functions of the brain are seen. Given this, there is disagreement about how milder forms of this disease should be managed and what level of Phe is safe to be left untreated. We seek to assess whether higher Phe levels, between 360 and 600µmol/L, are safe with respect to preservation of intelligence and higher cognitive functions.

Patients with phenylketonuria (PKU) have an inborn error in the metabolism of the amino acid phenylalanine (Phe) and thus must follow a strictly controlled protein-restricted diet from early infancy. This protein-restricted diet is devoid of natural dietary sources of n-3 long chain polyunsaturated fatty acids (LC-PUFA), such as eggs, meat, milk or fish. Therefore, blood concentrations of n-3 LC-PUFA, especially of docosahexaenoic acid (DHA) are reduced in PKU children compared to healthy controls. DHA availability is considered important for optimal neurological function. Previous studies have shown that neural function of PKU children is improved by high dose supplementation of fish oil providing DHA, as shown by significant improvements of both visual evoked potential latencies and of fine motor skills and coordination, but no dose response relationship has been established so far. This multicentric double-blind randomized trial aims at determining quantitative DHA requirements for optimal neural function in PKU children. Patients with classical PKU from several major treatment centers in Europe will be randomized to receive between 0 and 8 mg of DHA per kg body weight daily for a duration of 6 months. Biochemical (fatty acid composition of plasma phospholipids, lipoprotein metabolism and metabolic profiles), and functional testing (visual evoked potentials, fine motor skills, cognitive function and markers of immune function) will be performed at baseline and after 6 months. Intake per kg body weight will be related to outcome parameters and thus a possible dose response relationship will be defined. The results from this study are expected to contribute to the improvement of the diet of PKU patients, but they also have the potential to help defining quantitative DHA needs of healthy children. The primary hypothesis is that supplementation with DHA improves visual function in children with PKU.

Phenylketonuria (PKU) is a rare inherited metabolic disorder, where subjects are born with a genetic deficiency in the phenylalanine hydroxylase enzyme (PAH), which leaves them unable to convert Phenylalanine (Phe) into Tyrosine (Tyr). PKU patients have specific dietary needs and must follow a restrictive diet in the aim of preventing toxic levels of the amino acid phenylalanine (Phe) accumulation.

PURPOSE OF STUDY: To determine if a non-invasive skin stripping technique can be used to detect individuals with phenylalanine abnormalities, and to monitor dietary and/or drug effects over time.