RATIONALE: Antineoplastons are naturally-occurring substances that may also be made in the laboratory. Antineoplastons may inhibit the growth of cancer cells.

PURPOSE: This phase II trial studies the effectiveness of antineoplaston therapy in treating patients who have glioblastoma multiforme.

OBJECTIVES:

• Determine the objective response rate to escalating doses of antineoplastons A10 and AS2-1 in patients with glioblastoma multiforme.
• Assess tolerance to and side effects of this regimen in these patients.

OUTLINE: Patients receive gradually escalating doses of intravenous antineoplaston A10 and antineoplaston AS2-1 6 times daily until the maximum tolerated dose is reached. Treatment continues for at least 2 months in the absence of unacceptable toxicity or disease progression. Patients achieving complete response (CR) continue treatment for an additional 8 months after CR.

Tumors are measured after 1 month, every 1-2 months for 2 years, every 3 months for 1 year, every 4 months for 1 year, every 6 months for 1 year, and then annually thereafter.

PROJECTED ACCRUAL: Not specified

Ages Eligible for Study:  18 Years and above,  Genders Eligible for Study:  Both

Criteria

DISEASE CHARACTERISTICS:

• Histologically or cytologically confirmed glioblastoma multiforme
• Tumor subtotally resected or biopsied
• Radiologic evidence of residual or recurrent tumor by gadolinium-enhanced MRI, CT scan, or positron-emission tomography
• No brain stem tumor

PATIENT CHARACTERISTICS: Age:

• 18 and over

Performance status:

• Karnofsky 60-100%

Life expectancy:

• More than 4 months

Hematopoietic:

• WBC at least 1,500/mm^3
• Platelet count at least 50,000/mm^3
• Hemoglobin at least 10 g/dL

Hepatic:

• No hepatic failure
• Bilirubin no greater than 2.5 mg/dL
• SGOT and SGPT no greater than 5 times upper limit of normal

Renal:

• Creatinine no greater than 2.5 mg/dL
• No history of renal conditions that would contraindicate high dosages of sodium

Cardiovascular:

• No uncontrolled hypertension

Other:

• Not pregnant or nursing

PRIOR CONCURRENT THERAPY: Biologic therapy:

• No prior immunotherapy
• No concurrent immunomodulatory agents

Chemotherapy:

• No prior chemotherapy
• No concurrent antineoplastic agents

Endocrine therapy:

• Concurrent corticosteroids for cerebral edema allowed

Radiotherapy:

• No prior radiotherapy

Surgery:

• See Disease Characteristics
• Recovered from any prior surgery