Phase I and Pharmacokinetic Trial of Phenylbutyrate Given as a Continuous Infusion in Pediatric Patients With Refractory Malignancy
|First Received Date ICMJE||November 3, 1999|
|Last Updated Date||March 3, 2008|
|Start Date ICMJE||December 1996|
|Primary Completion Date||Not Provided|
|Current Primary Outcome Measures ICMJE||Not Provided|
|Original Primary Outcome Measures ICMJE||Not Provided|
|Change History||Complete list of historical versions of study NCT00001565 on ClinicalTrials.gov Archive Site|
|Current Secondary Outcome Measures ICMJE||Not Provided|
|Original Secondary Outcome Measures ICMJE||Not Provided|
|Current Other Outcome Measures ICMJE||Not Provided|
|Original Other Outcome Measures ICMJE||Not Provided|
|Brief Title ICMJE||Phase I and Pharmacokinetic Trial of Phenylbutyrate Given as a Continuous Infusion in Pediatric Patients With Refractory Malignancy|
|Official Title ICMJE||Phase I and Pharmacokinetic Trial of Phenylbutyrate Given as a Continuous Infusion in Pediatric Patients With Refractory Malignancy|
This is a pharmacokinetic trial. Patients receive phenylbutyrate through a central venous catheter for each 28 day cycle. The first several days of drug administration should be inpatient. Cycles may be repeated if there is no tumor progression or dose limiting toxicities (DLT). There are no breaks between cycles.
Once a minimum of 3 patients have completed at least 4 weeks of therapy without DLT, new patients will be entered at the next dose level.
Phenylbutyrate is an aromatic fatty acid that is converted to phenylacetate in vivo by mitochondrial beta-oxidation to phenylacetate. Preclinical studies have shown that continuous exposure to phenylacetate or phenylbutyrate can induce tumor cytostasis and differentiation in a wide variety of cell lines including malignant gliomas and neuroblastomas. However, phenylbutyrate has been shown to be a more potent differentiating agent than phenylacetate in a variety of tumor cell lines. In addition, phenylbutyrate appears to have molecular activities that are distinct from phenylacetate. The objective of this trial is to determine the maximum tolerated dose and the toxicities of phenylbutyrate administered as a continuous intravenous infusion for 28 days. In addition, the pharmacokinetics of phenylbutyrate and its metabolite, phenylacetate, will be studied using both model-dependent and model-independent parameters.
|Study Type ICMJE||Interventional|
|Study Phase||Phase 1|
|Study Design ICMJE||Endpoint Classification: Safety Study
Primary Purpose: Treatment
|Intervention ICMJE||Drug: phenylbutyrate|
|Study Arm (s)||Not Provided|
* Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
|Recruitment Status ICMJE||Completed|
|Completion Date||October 2000|
|Primary Completion Date||Not Provided|
|Eligibility Criteria ICMJE||
Histologically proven cancer that is refractory to standard therapy.
Patients with neurofibromatosis having progressive inoperable plexiform neurofibromas with potential to cause significant morbidity are eligible.
Patients with brainstem gliomas histology may have histology requirements waived.
Patients without prior therapy are eligible if they have diseases with no available standard therapy.
Patients with evidence of bone marrow involvement by tumor, or a history of either bone marrow transplantation or extensive radiotherapy will be eligible, but inevaluable for hematologic toxicities.
Patients with greater than grade 2 neurocortical toxicity will be excluded.
Biologic Therapy: No concurrent hematopoietic growth factor.
Chemotherapy: No chemotherapy within 3 weeks of study.
No nitrosoursea within 6 weeks of study.
No concurrent chemotherapy allowed.
Must be on stable or decreasing dose of dexamethasone within 2 weeks of study.
Endocrine Therapy: Not specified.
Radiotherapy: No radiotherapy within 6 weeks of study.
Surgery: Not specified.
Patient must be recovered from toxic effects of all prior therapy.
Concurrent antibiotic therapy when appropriate.
Age: 2 to 21.
Performance Status: ECOG 0-2.
Life Expectancy: At least 8 weeks.
Hematopoietic (hematologic requirements below do not apply to patients with histologically confirmed bone marrow involvement or history of either bone marrow transplantation or extensive radiotherapy; these patients are inevaluable for hematologic toxicity):
Absolute granulocyte count (AGC) at least 1500/mm3.
Platelet count at least 100,000/mm3.
Hemoglobin at least 8 g/dL.
Bilirubin no greater than 2 mg/Dl.
SGPT less than 2 times normal.
Creatinine no greater than 1.5 mg/Dl OR
Creatinine clearance at least 60 Ml/min/square meter.
No systemic illness.
Not pregnant or nursing.
No amino acidurias or organic acidemias.
|Accepts Healthy Volunteers||No|
|Contacts ICMJE||Contact information is only displayed when the study is recruiting subjects|
|Location Countries ICMJE||United States|
|NCT Number ICMJE||NCT00001565|
|Other Study ID Numbers ICMJE||970051, 97-C-0051|
|Has Data Monitoring Committee||Not Provided|
|Responsible Party||Not Provided|
|Study Sponsor ICMJE||National Cancer Institute (NCI)|
|Collaborators ICMJE||Not Provided|
|Investigators ICMJE||Not Provided|
|Information Provided By||National Institutes of Health Clinical Center (CC)|
|Verification Date||November 1999|
ICMJE Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP