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A Phase 2 Open-Label Study to Determine the Effect of Blinatumomab on Minimal Residual Disease in Subjects With High-risk Diffuse Large B-cell Lymphoma Post-autologous Hematopoietic Stem-cell Transplantation
This is a phase 2, multicenter, open-label, single arm estimation study in adult subjects with high-risk DLBCL in complete remission. The study will consist of up to a 21-day screening period, a run-in period of up to 24 months, a 12-week treatment period (8 weeks of blinatumomab treatment followed by a 4-week treatment free period), a 30-day safety follow-up visit after the last dose of blinatumomab, and a long-term follow-up period that begins after the safety follow-up visit is completed until 1 year from the first dose of blinatumomab. The study will enroll approximately 90 subjects in the screening period with biopsy proven, high-risk DLBCL that are positron emission tomography-computer tomography (PET-CT) negative 90 days (± 30 days) post aHSCT. During the run-in period subjects will be followed by clinic visits at regular interval for up to 24 months for monitoring of MRD status in plasma by a next generation sequencing (NGS)-based assay. It is estimated 30 subjects will be either MRD-positive at screening or become MRD-positive during the 24-month run-in period. The number of subjects enrolled may be altered in order to ensure that approximately 30 subjects are assigned to treatment with blinatumomab. Enrollment may be stopped, once approximately 30 subjects have been assigned to treatment with blinatumomab.