ADC Therapeutics today announced that it plans to discontinue the Phase 2 LOTIS-9 clinical trial evaluating ZYNLONTA® (loncastuximab tesirine-lpyl) and rituximab (Lonca-R) in unfit or frail patients with previously untreated diffuse large B-cell lymphoma (DLBCL). Given the challenges of defining the addressable segment of the difficult-to-treat unfit or frail DLBCL patient population, including many patients with significant active underlying co-morbidities, the benefit-risk profile does not support continuation of the LOTIS-9 trial. Following a meeting yesterday, the U.S. FDA placed a partial clinical hold on the trial for new patient enrollment but will allow patients already on therapy who are deriving clinical benefit to remain on therapy after being reconsented. Following treatment of any reconsenting patients, the Company will conduct the necessary steps to conclude the trial and does not plan to continue studying this regimen in the unfit or frail previously untreated DLBCL patient population.
