Phase 4
Completed N=10
Effects of Kuvan on Melatonin Secretion
Phenylketonuria (PKU)
Source: ClinicalTrials.gov NCT01617070 ↗
Enrolled (actual)
10
Serious AEs
0.0%
Results posted
Nov 2016
Primary outcomePrimary: Serum Melatonin at the End of 4 Weeks — 266.9; 205.7; 220.4; 301.2 pg/ml
◆ Published Evidence
Established
22citations · ~2 / year
Evaluation of Tetrahydrobiopterin Therapy with Large Neutral Amino Acid Supplementation in Phenylketonuria: Effects on Potential Peripheral Biomarkers, Melatonin and Dopamine, for Brain Monoamine Neurotransmitters.
Summary
This study examines the effect of tetrahydrobiopterin (Kuvan) and Large Neutral Amino Acid (LNAA) therapy on melatonin and dopamine levels in individuals with Phenylketonuria (PKU). The investigators hypothesize that Kuvan therapy will improve melatonin secretion and urine dopamine levels to some extent. However significantly greater responses in melatonin and dopamine secretions may be observed with combined treatment with Kuvan and supplementation of LNAA.
Linked Publications
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Evaluation of Tetrahydrobiopterin Therapy with Large Neutral Amino Acid Supplementation in Phenylketonuria: Effects on Potential Peripheral Biomarkers, Melatonin and Dopamine, for Brain Monoamine Neurotransmitters.
Outcome Measures
| Outcome | Result | p-value |
|---|---|---|
| PRIMARY Serum Melatonin at the End of 4 Weeks |
266.9; 205.7; 220.4; 301.2 | — |
| PRIMARY Urine 6-sulfatoxymelatonin at the End of 4 Weeks |
14.5; 8.2; 8.6; 13.2 | — |
| PRIMARY Urine Dopamine at the End of 4 Weeks |
63.7; 42.6; 46.0; 67.6 | — |
Eligibility Criteria
Inclusion Criteria
- Adult English-speaking patients who have confirmed PKU, and have tolerated Kuvan therapy at 20 mg/kg/day in the past, and are currently on the LNAA supplements will be considered as candidates for the study.
- Subjects must be able to stop LNAA therapy for 4 weeks.
- This will be determined by the subjects themselves, based on their past personal experiences.
Exclusion Criteria
- Individuals who have never taken Kuvan, who have never been on LNAA therapy, who are under the age of 18, or who do not speak English will be excluded.
- Subjects who cannot stop LNAA therapy for 4 weeks will be excluded.
Data sourced from ClinicalTrials.gov (NCT01617070) and the linked publication. Outcome figures and adverse-event rates are extracted automatically from the registry's posted results and are provided for clinician reference, not as a substitute for the primary publication. Informational only — not medical advice.