Prnewswire·2025-06-16 11:15Core Insights - ADC Therapeutics announced updated Phase 2 data for ZYNLONTA® showing an overall response rate (ORR) of 85% and a complete response (CR) rate of 69% in patients with relapsed/refractory marginal zone lymphoma (r/r MZL) [1][2] - The treatment was well tolerated, with safety profiles consistent with previous data [2][6] - The study is ongoing, with plans to expand enrollment to 50 patients across multiple sites [3][4] Study Details - The Phase 2 trial is a single-arm, open-label study led by Dr. Izidore S. Lossos at Sylvester Comprehensive Cancer Center [1][3] - As of February 10, 2025, 27 adult patients were enrolled, with 26 evaluable for response [2] - Among patients assessed for response, a CR rate of 61.5% was observed in high-risk POD24 patients [6] Efficacy and Safety - The longest duration of CR was 27 months from the start of treatment, with a progression-free survival (PFS) rate of 92.9% at 12 months [6] - Adverse events were consistent with the known safety profile of ZYNLONTA, with most being grade 1 or 2 [6] - Serious adverse events included neutropenia and RSV lung infection, with some patients requiring dose reductions [6] Regulatory and Future Plans - ZYNLONTA has received accelerated approval from the FDA and conditional approval from the European Medicines Agency for treating r/r large B-cell lymphoma [7][10] - The company plans to pursue regulatory pathways based on the ongoing trial results [4] - ZYNLONTA is also being evaluated in combination studies for other B-cell malignancies [8][10] Company Overview - ADC Therapeutics is a biotechnology company focused on developing targeted antibody drug conjugates (ADCs) for cancer treatment [9][10] - The company is based in Lausanne, Switzerland, with operations in London and New Jersey [11]