Bryostatin 1 Plus Vincristine in Treating Patients With Progressive or Relapsed Non-Hodgkin's Lymphoma After Bone Marrow or Stem Cell Transplantation

PRIMARY OBJECTIVES: I. To evaluate response rate when bryostatin 1 is given in combination with vincristine in patients with low and intermediate grade non-Hodgkin's lymphoma who have progressed or relapsed following an autologous bone marrow or stem cell transplant. II. To determine if blunting of apoptotic response (with two or more consecutive apoptotic fractions) following treatment using annexin V staining of peripheral blood CD5+ and CD19+ lymphocytes by flow cytometry is predictive of outcome (i.e. lack of clinical response). III. To prospectively evaluate the incidence of \> grade 3 myelotoxicity with this regimen. OUTLINE: This is a multicenter study. Patients receive bryostatin 1 IV over 24 hours on days 1 and 15 and vincristine IV on days 2 and 16. Treatment repeats every 4 weeks for up to 6 courses in the absence of disease progression or unacceptable toxicity. Patients without disease progression after 6 courses may continue therapy with bryostatin 1 IV over 24 hours on days 1 and 22 and vincristine IV on days 2 and 23. Courses repeat every 6 weeks in the absence of disease progression or unacceptable toxicity. Patients are followed every 3 months for 2 years, every 6 months for 2-5 years, and then annually thereafter.