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Study to Evaluate the Response to and Safety of an 8-Day Course of Phenoptin™ Treatment in Subjects With Phenylketonuria

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
 
ClinicalTrials.gov Identifier: NCT00104260
Recruitment Status : Completed
First Posted : February 25, 2005
Last Update Posted : April 9, 2007
Sponsor:
Information provided by:
BioMarin Pharmaceutical

Study Description
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Brief Summary:
The primary objective is to evaluate the degree and frequency of response to Phenoptin™ (sapropterin dihydrochloride), as demonstrated by a reduction in blood phenylalanine (Phe) level among subjects with phenylketonuria (PKU) who have elevated Phe levels. A secondary objective of this study is to evaluate the safety of Phenoptin™ treatment in this subject population, and identify individuals in this subject population who respond to Phenoptin™ treatment with a reduction in blood Phe level.

Condition or disease Intervention/treatment Phase
Phenylketonurias Drug: sapropterin dihydrochloride Phase 2

Study Design
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Study Type : Interventional  (Clinical Trial)
Enrollment : 700 participants
Allocation: Non-Randomized
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: A Phase 2, Multicenter, Open-Label Study to Evaluate the Response to and Safety of an 8-Day Course of Phenoptin™ Treatment in Subjects With Phenylketonuria Who Have Elevated Phenylalanine Levels
Study Start Date : December 2004
Actual Study Completion Date : November 2005

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Phenylketonuria

Arms and Interventions
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Outcome Measures
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Primary Outcome Measures :
  1. Evaluate the degree and frequency of response to Phenoptin™, as demonstrated by a reduction in blood Phe level among subjects with PKU who have elevated Phe levels

Secondary Outcome Measures :
  1. Evaluate the safety of Phenoptin™ treatment in this subject population, and identify individuals in this subject population who respond to Phenoptin™ treatment with a reduction in blood Phe level

Eligibility Criteria
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Ages Eligible for Study:   8 Years and older   (Child, Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria:

  • Age >/= 8 years
  • Blood Phe level >/= 450 umol/L at screening
  • Clinical diagnosis of PKU with hyperphenylalaninemia documented by past medical history of at least one blood Phe measurement >/= 360 umol/L (6 mg/dL)
  • Willing and able to provide written informed consent or, in the case of subjects under the age of 18, provide written assent (if required) and written informed consent by a parent or legal guardian, after the nature of the study has been explained
  • Negative urine pregnancy test at screening (non-sterile females of child-bearing potential only)
  • Male and Female subjects of childbearing potential childbearing potential (if sexually active and non-sterile) must be using acceptable birth control measures, as determined by the investigator, and willing to continue to use acceptable birth control measures while participating in the study
  • Willing and able to comply with study procedures
  • Willing to continue current diet unchanged while participating in the study

Exclusion Criteria:

  • Perceived to be unreliable or unavailable for study participation or, if under the age of 18, have parents or legal guardians who are perceived to be unreliable or unavailable
  • Use of any investigational agent within 30 days prior to screening, or requirement for any investigational agent or vaccine prior to completion of all scheduled study assessments
  • Pregnant or breastfeeding, or considering pregnancy
  • ALT > 5 times the upper limit of normal (i.e., Grade 3 or higher based on World Health Organization Toxicity Criteria) at screening
  • Concurrent disease or condition that would interfere with study participation or safety (e.g., seizure disorder, oral steroid-dependent asthma or other condition requiring oral or parenteral corticosteroid administration, or insulin-dependent diabetes, or organ transplantation)
  • Serious neuropsychiatric illness (e.g., major depression) not currently under medical control
  • Requirement for concomitant treatment with any drug known to inhibit folate synthesis (e.g., methotrexate)
  • Concurrent use of levodopa
  • Clinical diagnosis of primary BH4 deficiency
Contacts and Locations
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Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00104260


Locations
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United States, California
Los Angeles, California, United States
Oakland, California, United States
United States, Connecticut
New Haven, Connecticut, United States
United States, Illinois
Chicago, Illinois, United States
United States, Massachusetts
Boston, Massachusetts, United States
United States, Minnesota
Minneapolis, Minnesota, United States
United States, Missouri
St. Louis, Missouri, United States
United States, New York
New York, New York, United States
United States, Oregon
Portland, Oregon, United States
United States, Pennsylvania
Pittsburgh, Pennsylvania, United States
United States, Texas
Dallas, Texas, United States
United States, Utah
Salt Lake City, Utah, United States
United States, Wisconsin
Madison, Wisconsin, United States
Sponsors and Collaborators
BioMarin Pharmaceutical
More Information
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Additional Information:

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ClinicalTrials.gov Identifier: NCT00104260    
Other Study ID Numbers: PKU-001
First Posted: February 25, 2005    Key Record Dates
Last Update Posted: April 9, 2007
Last Verified: April 2007
Additional relevant MeSH terms:
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Phenylketonurias
Brain Diseases, Metabolic, Inborn
Brain Diseases, Metabolic
Brain Diseases
Central Nervous System Diseases
Nervous System Diseases
Amino Acid Metabolism, Inborn Errors
Metabolism, Inborn Errors
Genetic Diseases, Inborn
 Metabolic Diseases
Verapamil
Anti-Arrhythmia Agents
Calcium Channel Blockers
Membrane Transport Modulators
Molecular Mechanisms of Pharmacological Action
Calcium-Regulating Hormones and Agents
Physiological Effects of Drugs
Vasodilator Agents