Antineoplaston Therapy in Treating Children With Low-Grade Astrocytoma

OBJECTIVES:

- Determine the antitumor activity of antineoplastons A10 and AS2-1 in children with
low-grade astrocytoma by determining the proportion of patients who experience an
objective tumor response.

- Evaluate the adverse effects of and tolerance to this regimen in these patients.

OUTLINE: This is an open-label study.

Patients receive gradually escalating doses of intravenous antineoplaston A10 and
antineoplaston AS2-1 6 times per day until the maximum tolerated dose is reached. Treatment
continues for at least 2 months in the absence of disease progression or unacceptable
toxicity. After 2 months, patients with responding or stable disease may continue treatment.

Tumors are measured every 8 weeks for 2 years, every 3 months for the third and fourth
years, every 6 months for the fifth and sixth years, and then annually thereafter.

PROJECTED ACCRUAL: A total of 20-40 patients will be accrued for this study.

DISEASE CHARACTERISTICS:

- Histologically confirmed low-grade astrocytoma that is unlikely to respond to
existing therapy and for which no curative therapy exists

- Evidence of tumor by MRI or CT scan

- Tumor must be at least 5 mm

PATIENT CHARACTERISTICS:

Age:

- 6 months to 17 years

Performance status:

- Karnofsky 60-100%

Life expectancy:

- At least 2 months

Hematopoietic:

- WBC at least 2,000/mm^3

- Platelet count greater than 50,000/mm^3

Hepatic:

- Bilirubin no greater than 2.5 mg/dL

- SGOT/SGPT no greater than 5 times upper limit of normal

- No hepatic failure

Renal:

- Creatinine no greater than 2.5 mg/dL

- No history of renal conditions that contraindicate high dosages of sodium

Cardiovascular:

- No severe heart disease

- No uncontrolled hypertension

- No history of congestive heart failure

- No other cardiovascular conditions that contraindicate high dosages of sodium

Pulmonary:

- No severe lung disease

Other:

- Not pregnant or nursing

- Fertile patients must use effective contraception during and for 4 weeks after study
participation

- No serious active infections or fever

- No other serious concurrent disease

PRIOR CONCURRENT THERAPY:

Biologic therapy:

- At least 4 weeks since prior immunotherapy and recovered

- No concurrent immunomodulating agents

Chemotherapy:

- At least 4 weeks since prior chemotherapy (6 weeks for nitrosoureas) and recovered

- No concurrent antineoplastic agents

Endocrine therapy:

- Concurrent corticosteroids for cerebral edema allowed (must be on stable dose for at
least 1 week prior to study entry)

Radiotherapy:

- At least 8 weeks since prior radiotherapy and recovered

Surgery:

- Not specified

Other:

- No prior antineoplaston therapy