Unum Therapeutics Announces Regulatory Update from Phase 1 Trial with ACTR087

CAMBRIDGE, MA, USA I July 02, 2019 I Unum Therapeutics Inc. (NASDAQ: UMRX), a clinical-stage biopharmaceutical company focused on the development of cellular immunotherapies to treat cancer based on its novel T cell technology platforms, today announced that the U.S. Food and Drug Administration (FDA) has placed a clinical hold on the Phase 1 trial (ATTCK-20-2) evaluating Unum’s ACTR087 in combination with rituximab following lymphodepleting chemotherapy with fludarabine and cyclophosphamide in patients with relapsed/refractory CD20+ B cell non-Hodgkin lymphoma (r/r NHL). The clinical hold was initiated following the submission of a safety report by Unum to the FDA regarding one patient in the safety expansion cohort of the trial (Cohort 3) who recently experienced serious adverse events that included Grade 3 neurotoxicity and cytomegalovirus (CMV) infection, and Grade 4 respiratory distress.

In November 2018, Unum announced it was deprioritizing ACTR087 as its lead product candidate in combination with rituximab to treat patients with r/r NHL in order to advance its new ACTR construct, ACTR707, in this setting. As a result of this decision, in May 2019, Unum announced its completion of enrollment in the Phase 1 ATTCK-20-2 trial with ACTR087. FDA has agreed that patients who previously received ACTR087 and have ongoing clinical responses may continue to receive rituximab infusions, with continued monitoring for adverse events. Unum will continue to work closely with the FDA to further review these events and continues to plan to report data from the ATTCK-20-2 trial at the end of 2019.

About Unum Therapeutics
Unum Therapeutics is a clinical-stage biopharmaceutical company providing potentially curative T cell therapies to treat a broad range of cancer patients. Unum’s novel proprietary technologies include Antibody-Coupled T cell Receptor (ACTR), a universal, engineered cell therapy intended to be used in combination with a wide range of tumor-specific antibodies to target different tumor types, and Bolt-On Chimeric Receptor (BOXR), an approach for improving T cell functionality in solid tumor cancer applications. Unum has four programs currently in Phase 1 clinical testing, including ACTR707 used in combination with rituximab in adult patients with r/r NHL; ACTR087 used in combination with the novel antibody SEA-BCMA in r/r multiple myeloma; and ACTR707 used in combination with trastuzumab in adult patients with HER2+ advanced cancer. The Company is headquartered in Cambridge, MA.

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