This trial is active, not recruiting.

Condition phenylketonuria
Treatment ravpal-peg
Phase phase 2
Sponsor BioMarin Pharmaceutical
Start date January 2010
End date May 2017
Trial size 68 participants
Trial identifier NCT00924703, PAL-003


This study is an extension of previous rAvPAL-PEG studies. Administration of rAvPAL-PEG will be continued to assess whether long-term dosing of rAvPAL-PEG is safe and can maintain reduced blood Phe concentrations in PKU subjects.

United States No locations recruiting
Other Countries No locations recruiting

Study Design

Intervention model single group assignment
Masking open label
Primary purpose treatment
rAvPAL-PEG in varying doses dependent on safety and efficacy.
ravpal-peg Phenylalanine ammonia lyase
The doses are planned to be in the same range as those tested in PAL-002 or PAL-004 and then modified either by increasing or decreasing the dose, adhering to an upper limit up to 5.0 mg/kg per week or 375 mg/week, considering each subject's individual responses related to safety and efficacy.

Primary Outcomes

Blood Phe concentrations
time frame: 3 days postdose

Secondary Outcomes

Safety based on the incidence of adverse events and clinically significant changes in vital signs
time frame: Screening and monthly up to 98 months
Antibody response
time frame: Week 1 and quarterly thereafter (eg. Week 12, 24, etc.up to Week 392)
time frame: Week 1 and quarterly thereafter, up to Week 392 or Quarter 32
Safety based on clinically significant changes in laboratory test results
time frame: Screening and monthly thereafter up to 98 Months

Eligibility Criteria

Male or female participants from 16 years up to 55 years old.

Inclusion Criteria: - Must have completed participation in previous rAvPAL-PEG studies. - Willing and able to provide written, signed informed consent, or, in the case of participants 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, and prior to any research-related procedures. - Willing and able to comply with all study procedures. - Females of childbearing potential must have a negative pregnancy test at Screening and be willing to have additional pregnancy tests during the study. Females considered not of childbearing potential include those who have been in menopause at least 2 years, or had tubal ligation at least 1 year prior to Screening, or who have had total hysterectomy. - Sexually active subjects must be willing to use an acceptable method of contraception while participating in the study. - Maintained a stable diet. - In generally good health as evidenced by physical examination, clinical laboratory evaluations (hematology, chemistry, and urinalysis), and electrocardiogram (ECG) at Screening. Exclusion Criteria: - Use of any investigational product (with the exception of rAvPAL-PEG) or investigational medical device within 30 days prior to Screening, or requirement for any investigational agent prior to completion of all scheduled study assessments. - Use of any medication that is intended to treat PKU within 14 days prior to the administration of study drug. - Use or planned use of any injectable drugs containing PEG (other than rAvPAL-PEG), including Depo-Provera during study participation. - A prior reaction that included systemic symptoms (eg, generalized hives, respiratory or gastrointestinal problems, hypotension, angioedema, anaphylaxis) to rAvPAL-PEG or a PEG-containing product. - Pregnant or breastfeeding at Screening or planning to become pregnant (self or partner) or to breastfeed at any time during the study.Concurrent disease or condition that would interfere with study participation or safety (eg, history or presence of clinically significant cardiovascular, pulmonary, hepatic, renal, hematologic, gastrointestinal, endocrine, immunologic, dermatologic, neurological, oncologic, or psychiatric disease). - Any condition that, in the view of the PI, places the subject at high risk of poor treatment compliance or of not completing the study. - Known hypersensitivity to rAvPAL-PEG or its excipients, including hypersensitivity reactions that necessitated early termination from previous rAvPAL-PEG studies. - Alanine aminotransferase (ALT) concentration > 2 times the upper limit of normal. - Creatinine > 1.5 times the upper limit of normal.

Additional Information

Official title Long-term Extension of a Phase 2, Open-Label Dose-Finding Study to Evaluate the Safety, Efficacy, and Tolerability of Multiple Subcutaneous Doses of rAvPAL-PEG in Subjects With PKU
Description PAL-003 is designed to evaluate long-term treatment of subjects who are continuing to take rAvPAL-PEG. Subjects'previous rAvPAL-PEG dosing will continue in PAL-003. In PAL- 003, each subject's dose will be adjusted as needed to attain or maintain blood Phe concentrations of 60-600 µmol/L. rAvPAL-PEG dose will be based on either a subject's weight or will be a fixed dose (subjects who have maintained blood Phe levels to 60-600 µmol/L for at least 2 consecutive weeks and who have maintained a stable rAvPAL-PEG dose for at least 2 consecutive weeks). Doses will be evaluated on an individual basis.
Trial information was received from ClinicalTrials.gov and was last updated in June 2016.
Information provided to ClinicalTrials.gov by BioMarin Pharmaceutical.