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SUMMARY: This is an open label study combining Rituxan and SDX-105. Rituxan will be given on day 1 followed by a 30-60 minute intravenous infusion of SDX-105 on day 2 and day 3. Treatment will repeat every 21 days (a cycle). Treatment can continue for up to 6 cycles (about 4 months) if tumor status improves and there are no unacceptable side effects. Patients will be followed for up to 2 years or until disease progression. RATIONALE: Rituxan has been shown to increase the sensitivity of cells to chemotherapy. The combination of SDX-105 and Rituxan has been effective in both the laboratory and in a recent clinical study with Non-Hodgkin's lymphoma patients. PURPOSE: This study will evaluate the safety and effectiveness of SDX-105 plus Rituxan in patients with Non-Hodgkin's lymphoma who have relapsed after taking Rituxan.
INCLUSION CRITERIA: Documented B-Cell NHL or mantle cell lymphoma * CD-20+ tumor * Indolent NHL: follicular B-cell lymphoma, diffuse small lymphoma, marginal zone lymphoma * Maximum of three prior chemotherapy regimens * Age of at least 18 years at Screening Visit (Site specific requirement may differ) EXCLUSION CRITERIA: * Refractory to rituximab, defined as progression of disease while being treated with rituximab or progression within 6 months of the last dose of rituximab (when given either as a single agent or in combination) * Previous chemotherapy or immunotherapy within 3 weeks prior to entering the study (6 weeks for nitrosoureas or mitomycin) or failure to recover from adverse events due to any agents administered previously * Use of investigational agents within 28 days of study * History of prior high dose chemotherapy with allogeneic stem cell support * History of prior radioimmunotherapy
is designated in this study