ADC Therapeutics SA (NYSE: ADCT), a commercial-stage global leader and pioneer in the field of antibody drug conjugates (ADCs), today announced the completion of enrollment in LOTIS-5, the Phase 3 confirmatory trial evaluating ZYNLONTA® (loncastuximab tesirine-lpyl) in combination with rituximab (Lonca-R) in patients with relapsed or refractory diffuse large B-cell lymphoma (r/r DLBCL). ZYNLONTA previously received accelerated approval for the treatment of r/r DLBCL after two or more lines of systemic therapy from the FDA in 2021.
"This milestone for LOTIS-5 brings us a step closer to providing a potential combination treatment in the 2L+ DLBCL setting that we believe will offer competitive efficacy with favorable safety and a convenient dosing schedule, well-suited for use in patients across care settings," said Mohamed Zaki, MD, PhD, Chief Medical Officer of ADC Therapeutics. "We anticipate sharing topline results of the primary endpoint analysis by the end of 2025 once the pre-specified number of events is reached and potentially submitting our supplemental BLA to the U.S. Food and Drug Administration (FDA) in the first quarter of 2026."
The randomized, open‐label, two‐part, two‐arm, multicenter study is designed to confirm accelerated approval and may support potential label expansion into 2L+ in combination with rituximab. Twenty patients were enrolled in part 1 of a non-randomized safety run‐in. As previously reported, the results showed an overall response rate (ORR) by central review of 80% (16/20) with a complete response (CR) rate of 50% (10/20) and no new safety signals.
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