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Phenoptin

Phase 2

Tetrahydrobiopterin Deficiencies | Small molecule | Rare Disease |BioMarin Pharmaceutical Inc.|Last Updated: Sep 25, 2020

Success Probability

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Market & Valuation

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Trial Design

UNCONTROLLED
Total Trials1
Total Enrollment12

FDA Designations

No designations recorded

Clinical trial landscape

Phenoptin · 1 trial · 2 indications

Phase 2 1
NCT00355264Safety and Efficacy Study of Phenoptin in Subjects With Hyperphenylalaninemia Due to BH4 DeficiencyTetrahydrobiopterin Deficiencies
COMPLETED12 Analytics
PHASE2COMPLETED
Safety and Efficacy Study of Phenoptin in Subjects With Hyperphenylalaninemia Due to BH4 Deficiency
Tetrahydrobiopterin DeficienciesUnlock trial analytics

Study Endpoints

Primary Endpoints

Blood Phenylalanine(Phe) Levels Measured at Specified Timepoints
At Baseline, Week 4 through Extension Week 130

Baseline blood phenylalanine(Phe) value is the latest measurement taken prior to initiation of Phenoptin treatment. The ideal range for blood Phe levels is approximately 120-360 µmol/L.

Percentage of Subjects With Blood Phenylalanine (Last Observation Carried Forward) < 360 μmol/L
At Baseline, Week 4 through Extension Week 130

Baseline blood phenylalanine(Phe) value is the latest measurement taken prior to initiation of Phenoptin treatment. The objective of this outcome was to compare to Phe levels achieved using previous treatment regimens.

Secondary Endpoints

Subjects Experiencing Adverse Events(AEs)
Up to 35 Months
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Study Design & Arms

AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Single Arm on Active DrugEXPERIMENTAL5mg/kg/day orally, dose may be adjusted to between 5-20 mg/kg/day by investigator at week 6 to control blood Phe levels Outcomes were also evaluated by the subject's type of BH4 deficiency either defects in the genes encoding the enzymes involved in biosynthesis or defects in the genes encoding the enzymes involved in recycling.

Interventions

NameTypeDescription
PhenoptinDRUG5mg/kg/day orally, dose may be adjusted to between 5-20 mg/kg/day by investigator at week 6 to control blood Phe levels
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Eligibility Criteria

SexALL
Healthy VolunteersNo
Study Sites10

Inclusion Criteria: * Documented history of blood Phe level \> 180 µmol/L on at least one occasion * Established diagnosis of hyperphenylalaninemia (HPA) due to primary BH4 deficiency with a documented defect in biopterin metabolism with blood or urine tests * Willing and able to provide written in...

Countries:United StatesGermany
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Frequently asked questions about Phenoptin

What is Phenoptin used for?

Phenoptin is an investigational small molecule being developed for tetrahydrobiopterin deficiencies, a rare disease. It is studied in patients with hyperphenylalaninemia due to BH4 deficiency, a condition also referred to as non-phenylketonuric hyperphenylalaninemia. The drug is not approved and remains in clinical development.

Who makes Phenoptin?

Phenoptin is being developed by BioMarin Pharmaceutical Inc., a biopharmaceutical company traded on the NASDAQ under the ticker BMRN. BioMarin is conducting clinical research on Phenoptin for the treatment of tetrahydrobiopterin deficiencies.

What phase is Phenoptin in?

Phenoptin is in Phase 2 clinical development. It has completed one Phase 2 trial, and no active trials are currently listed. The drug is investigational and has not been approved by regulatory authorities.

What clinical trials is Phenoptin in?

Phenoptin has been studied in one completed Phase 2 clinical trial, identified as NCT00355264. This trial evaluated the safety and efficacy of Phenoptin in subjects with hyperphenylalaninemia due to BH4 deficiency. The study enrolled 12 participants and was conducted in the United States and Germany.

Is Phenoptin the same as Kuvan?

Phenoptin is a separate investigational drug from Kuvan, which is also developed by BioMarin. While both are small molecules related to tetrahydrobiopterin pathways, Phenoptin is specifically being studied for tetrahydrobiopterin deficiencies and has a distinct clinical development program.