On June 30, 2026 ADC Therapeutics SA (NYSE: ADCT), a commercial-stage global leader and pioneer in the field of antibody drug conjugates (ADCs), reported the completion of enrollment in the LOTIS-7 Phase 1b open-label clinical trial evaluating the safety and efficacy of ZYNLONTA (loncastuximab tesirine-lpyl) in combination with the bispecific antibody glofitamab (COLUMVI) in patients with relapsed or refractory (r/r) diffuse large B-cell lymphoma (r/r DLBCL).

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LOTIS-7 trial enrollment is now complete with 100 r/r DLBCL patients dosed at the selected 150 µg/kg dose of ZYNLONTA plus glofitamab. Enrollment occurred in 30 total sites with 70% of patients in the US and 30% in the EU. The study enrolled patients with baseline characteristics similar to other bispecific combination studies in this space and included 46% relapsed and 54% primary refractory patients with a median age of 66 years.

Primary endpoints of the study include safety and tolerability. Secondary endpoints include overall response rate, duration of response, complete response, relapse free survival, progression-free survival, and overall survival, as well as pharmacokinetics and immunogenicity. As part of the study protocol, anti-infective prophylaxis, intravenous immunoglobulin (in patients experiencing B-cell loss with an increased risk of infection) and vaccination are strongly recommended.

"We are excited by the previously reported data from this study which demonstrated an 89.8% ORR and 77.6% CR and a manageable safety profile across the 49 efficacy-evaluable patients with a minimum of 6 months of follow-up," said Mohamed Zaki, MD, PhD, Chief Medical Officer of ADC Therapeutics. "We continue to believe this ZYNLONTA combination has the potential to be the best-in-class bispecific antibody-based combination in 2L+ DLBCL. With enrollment now complete, we look forward to sharing more comprehensive results from LOTIS-7 later this year."

Further to the previously reported results from LOTIS-7 demonstrating promising clinical activity for the combination of ZYNLONTA plus glofitamab in patients with r/r DLBCL, the Company plans to share full data from LOTIS-7 at a medical meeting and submit the results for publication by the end of 2026. In addition, the Company plans to assess potential regulatory and compendia pathways for the combination.

About LOTIS-7

LOTIS-7 is a Phase 1b global multicenter, multi-arm study in patients with relapsed or refractory B-cell non-Hodgkin lymphoma (B-NHL) including Part 1 (dose escalation) and Part 2 (dose expansion). The three dosing arms include ZYNLONTA plus polatuzumab vedotin, ZYNLONTA plus glofitamab, and ZYNLONTA plus mosunetuzumab T-cell-engaging bispecific monoclonal antibodies (BsAbs). Enrollment in LOTIS-7 includes Part 1 of the study with a 3+3 dose escalation in 3L+ heavily pre-treated patients with ZYNLONTA doses starting at 90 µg/kg and then proceeding to 120 µg/kg and 150 µg/kg. Part 2 includes dose expansion in 2L+ large B-cell lymphoma in the ZYNLONTA plus glofitamab arm at dose levels determined from Part 1 (120 µg/kg and 150 µg/kg of ZYNLONTA plus the approved dosing of glofitamab).

For more information about the LOTIS-7 trial, visit clinicaltrials.gov (NCT04970901).

About ZYNLONTA

ZYNLONTA is a CD19-directed antibody drug conjugate (ADC). Once bound to a CD19-expressing cell, ZYNLONTA is internalized by the cell, where enzymes release a pyrrolobenzodiazepine (PBD) payload. The potent payload binds to DNA minor groove with little distortion, remaining less visible to DNA repair mechanisms. This ultimately results in cell cycle arrest and tumor cell death.

The U.S. Food and Drug Administration (FDA) and the European Medicines Agency (EMA) have approved ZYNLONTA (loncastuximab tesirine-lpyl) for the treatment of adult patients with relapsed or refractory (r/r) large B-cell lymphoma after two or more lines of systemic therapy, including diffuse large B-cell lymphoma (DLBCL) not otherwise specified (NOS), DLBCL arising from low-grade lymphoma and also high-grade B-cell lymphoma. The trial included a broad spectrum of heavily pre-treated patients (median three prior lines of therapy) with difficult-to-treat disease, including patients who did not respond to first-line therapy, patients refractory to all prior lines of therapy, patients with double/triple hit genetics and patients who had stem cell transplant and CAR-T therapy prior to their treatment with ZYNLONTA. This indication is approved by the FDA under accelerated approval and in the European Union under conditional approval based on overall response rate and continued approval for this indication may be contingent upon verification and description of clinical benefit in a confirmatory trial. Please see full prescribing information including important safety information about ZYNLONTA at www.ZYNLONTA.com.

ZYNLONTA is also being evaluated as a therapeutic option in combination studies in other B-cell malignancies and earlier lines of therapy.

(Press release, ADC Therapeutics, JUN 30, 2026, View Source [SID1234669022])