PTC299 in Treating Young Patients With Refractory or Recurrent Primary Central Nervous System Tumors

Study Overview
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Brief Summary
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RATIONALE: PTC299 may stop the growth of tumor cells by blocking blood flow to the tumor. PURPOSE: This phase I trial is studying the side effects and the best dose of PTC299 in treating young patients with recurrent or refractory primary central nervous system tumors.

Detailed Description
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OBJECTIVES: Primary To estimate the maximum-tolerated dose and the recommended phase II dose of VEGF inhibitor PTC299 (PTC299) in pediatric patients with recurrent or progressive primary central nervous system (CNS) tumors. To evaluate and characterize the adverse events associated with this regimen in these patients. To evaluate and characterize the pharmacokinetics and pharmacodynamics of this regimen in these patients. Secondary To investigate the relationships between PTC299 plasma exposure and other outcomes measures. To evaluate the antitumor activity of this regimen in these patients. To evaluate changes in angiogenic and inflammatory markers in the blood and the relationship between these changes and other outcome measures. To obtain preliminary evidence of biologic activity of PTC299 by using magnetic resonance diffusion to assess tumor cellularity. OUTLINE: This is a multicenter, dose-escalation study. Patients receive oral VEGF inhibitor PTC299 twice or thrice daily. Treatment repeats every 28 days for up to 12 courses in the absence of disease progression or unacceptable toxicity. Blood samples are collected at baseline and periodically during study for pharmacokinetic and pharmacodynamic studies by ELISA. After completion of study therapy, patients are followed up for 30 days.

Official Title
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Phase I and Pharmacokinetic Trial of PTC299 in Pediatric Patients With Refractory or Recurrent CNS Tumors

Conditions
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Brain and Central Nervous System Tumors

Intervention / Treatment
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* Drug: VEGF inhibitor PTC299


Participation Criteria
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Eligibility Criteria
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DISEASE CHARACTERISTICS: Histologically confirmed diagnosis of primary central nervous system (CNS) malignancy at time of diagnosis or recurrence Histology verification not required for intrinsic brain stem tumors and optic pathway gliomas Must have radiographic evidence of progression Recurrent, progressive, or refractory disease to standard therapy and for which there is no known curative therapy PATIENT CHARACTERISTICS: Karnofsky performance status (PS) 50-100% (patients > 16 years of age) OR Lansky PS 50-100% (patients ≤ 16 years of age) Body weight ≥ 15 kg and ≤ 100 kg Patients with neurological deficits allowed provided they are stable for ≥ 1 week Able to swallow capsules ANC ≥ 1,000/μL (unsupported) Platelet count ≥ 100,000/μL (unsupported) Hemoglobin ≥ 8 g/dL (may be supported) Creatinine clearance or radioisotope glomerular filtration rate (GFR) ≥ 70 mL/min/1.73 m^2 OR serum creatinine normal based on age as follows: 0.8 mg/dL (≤ 5 years of age) 1.0 mg/dL (> 5 to ≤ 10 years of age) 1.2 mg/dL (> 10 to ≤ 15 years of age) 1.5 mg/dL (> 15 years of age) Urine protein/creatinine ratio < 1.0 Total bilirubin ≤ 1.5 times upper limit of normal (ULN) ALT and AST ≤ 2.5 times ULN Albumin ≥ 2.5 g/dL PT and activated PTT ≤ 1.2 times ULN Not pregnant or nursing Negative pregnancy test Fertile patients must use effective contraception No clinically significant unrelated systemic illness that would compromise the patient's ability to tolerate protocol therapy, or would likely interfere with the study procedures or results, including any of the following: Serious infections including ongoing systemic bacterial, fungal, or viral infection Significant cardiac, pulmonary, hepatic, or other organ dysfunction Willing and able to comply with schedule visits, drug administration plan, laboratory tests, including pharmacokinetic and pharmacodynamic assessments, or other study procedures No known coagulopathy or bleeding diathesis No known history of drug-induced liver injury No CNS, pulmonary, gastrointestinal, or urinary bleeding within the past month No uncontrolled systemic hypertension (systolic BP or diastolic BP > 95% percentile for age) No alcohol or drug addiction Able to tolerate periodic MRI scans and gadolinium contrast PRIOR CONCURRENT THERAPY: See Disease Characteristics Recovered from the acute toxic of all prior therapy (excluding alopecia and neurotoxicity) At least 3 weeks since prior myelosuppressive anticancer chemotherapy (6 weeks for nitrosourea) At least 14 days since prior investigational or biological agent At least 3 half-lives since prior biological agents that have a prolonged half-life At least 3 half-lives since prior monoclonal antibody At least 2 weeks since prior local palliative radiotherapy At least 6 weeks since prior total-body irradiation, craniospinal radiotherapy, or radiotherapy to ≥ 50% of the pelvis At least 90 days since prior allogeneic bone marrow transplantation No active graft-versus-host disease Concurrent dexamethasone or other corticosteroids allowed provided dose is stable for ≥ 7 days At least 1 week since prior colony-forming growth factors (e.g., filgrastim, sargramostim, erythropoietin) At least 14 days since long-acting colony-forming growth factor formulations (e.g., pegfilgrastim) More than 4 weeks since prior major surgical procedures More than 2 weeks since prior intermediate surgical procedures More than 7 days since minor surgical procedures No other concurrent anticancer or investigational drug therapy

Ages Eligible for Study
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Minimum Age: 3 Years
Maximum Age: 21 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Intervention/Treatment |
| --- |
|Drug: VEGF inhibitor PTC299|This is a dose escalation study. Study participants will receive .6 or 1.2 mg/kg orally twice daily or 1.2, 1.5, or 2.0 mg/kg orally three times daily for four consecutive weeks (a course). In the absence of unacceptable toxicity or disease progression, treatment may continue for up to 12 courses (approximately one year)|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Maximum-tolerated dose |  | First four weeks of treatment | 
| Adverse events |  | From the first day of treatment until 30 days after the last dose | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Percentage of study participants with complete response or partial response to the study treatment | Brain images to assess partial or complete response are performed every 8 weeks after the first dose of the study drug. | Every 8 weeks | 
| Pharmacokinetics | Blood samples from study participants will be collected on day 1 and day 28 of course 1 for standard full pharmacokinetic studies. | Day 1 and day 28 of course 1 | 
| Change from baseline in blood angiogenic markers and cytokines at discontinuation or completion of treatment | Blood samples will be collected and analyzed on Day 1 of pre-AM dosing at baseline and at the discontinuation or completion of treatment. Changes from baseline in blood angiogenic markers and cytokines (VEGF-A, VEGF-C, VEGF-D, PlGF, VEGFR-1, VEGFR-2, IL-6, and IL-8) will be assessed. | Before the first dose of drug on day 1 of course 1 and at the discontinuation or completion of treatment | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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recurrent childhood malignant germ cell tumor, recurrent childhood brain stem glioma, recurrent childhood brain tumor, recurrent childhood central nervous system embryonal tumor, recurrent childhood cerebellar astrocytoma, recurrent childhood cerebral astrocytoma, recurrent childhood ependymoma, recurrent childhood medulloblastoma, recurrent childhood pineoblastoma, recurrent childhood rhabdomyosarcoma, recurrent childhood spinal cord neoplasm, recurrent childhood subependymal giant cell astrocytoma, recurrent childhood visual pathway and hypothalamic glioma, recurrent childhood visual pathway glioma, childhood central nervous system choriocarcinoma, childhood central nervous system germ cell tumor, childhood central nervous system germinoma, childhood central nervous system mixed germ cell tumor, childhood central nervous system teratoma, childhood central nervous system yolk sac tumor, childhood astrocytoma, childhood medulloepithelioma, childhood meningioma, childhood mixed glioma, childhood oligodendroglioma, childhood pineal parenchymal tumor