Key clinical point: Loncastuximab tesirine (Lonca) shows long-term efficacy and a manageable safety profile in heavily pretreated patients with relapsed or refractory diffuse large B-cell lymphoma (DLBCL).
Major finding: At a median follow-up of 7.8 months, 48.3% of patients achieved an overall response, with a complete response being achieved by 24.8% of patients, 44% and 31% of whom remained event-free for ≥ 1 year and ≥ 2 years, respectively. The median overall and progression-free survival durations were 9.5 and 4.9 months, respectively. No new safety concerns were detected.
Study details: This long-term follow-up analysis of the phase 2 LOTIS-2 study included 145 heavily pretreated adult patients with relapsed or refractory DLBCL who received Lonca once every 3 weeks (0.15 mg/kg for 2 cycles; 0.075 mg/kg for subsequent cycles).
Disclosures: This study was funded by ADC Therapeutics SA. Some authors declared serving as consultants, advisors, or speakers for or receiving research funding or honoraria from various sources, including ADC Therapeutics. Four authors declared being employees of and holding equity and stock options in ADC Therapeutics.
Source: Caimi PF et al. Loncastuximab tesirine in relapsed/refractory diffuse large B-cell lymphoma: Long-term efficacy and safety from the phase 2 LOTIS-2 study. Haematologica. 2023 (Aug 31). doi: 10.3324/haematol.2023.283459