Phase II Study of Anti-GD2 3F8 Antibody and Biologic Response Modifiers for High-risk Neuroblastoma

OBJECTIVES:

• Determine the efficacy of beta-glucan, isotretinoin, and sargramostim (GM-CSF) in enhancing monoclonal antibody 3F8-mediated ablation in patients with high-risk refractory neuroblastoma.
• Determine the antitumor activity of this regimen, in terms of assessing disease status in the bone marrow by real-time quantitative reverse transcription polymerase chain reaction, in these patients.
• Determine the toxicity of this regimen in these patients.

OUTLINE: This is an open-label study. Patients are stratified according to refractory disease (primary refractory [never had disease progression or disease recurrence] vs secondary refractory [recurrent disease that did not respond completely to reinduction therapy]).

• Courses 1 and 2: Patients receive sargramostim (GM-CSF) subcutaneously once daily on days -5 to 11. Patients also receive oral beta-glucan once daily on days -2 to 11 and monoclonal antibody (MOAB) 3F8 IV over 30-90 minutes on days 0-4 and 7-11.
• Courses 3 and 4: Patients receive GM-CSF, beta-glucan, and MOAB 3F8 as above. Patients also receive oral isotretinoin twice daily on days -2 to 11.

Treatment repeats every 2-4 weeks for 4 courses in the absence of disease progression or unacceptable toxicity.