Genmab Announces Epcoritamab Investigational Combination Therapy Demonstrates High Response Rates in Patients with Relapsed or Refractory (R/R) Diffuse Large B-Cell Lymphoma (DLBCL) Eligible for Autologous Stem Cell Transplantation (ASCT)

Genmab A/S (Nasdaq: GMAB) today announced new results from the Phase 1b/2 EPCORE NHL-2 trial Arm 10 (NCT04663347), evaluating epcoritamab, a T-cell engaging bispecific antibody administered subcutaneously, in combination with rituximab, ifosfamide, carboplatin, and etoposide (R-ICE) in adult patients with relapsed/refractory diffuse large B-cell lymphoma (R/R DLBCL) who are eligible for autologous stem cell transplantation (ASCT). Results demonstrated an overall response rate (ORR) of 87 percent, a complete response (CR) rate of 65 percent and a partial response (PR) of 23 percent. The majority of patients (65 percent) proceeded to ASCT. At six months, an estimated 81 percent of responses were ongoing, 74 percent of patients were progression free, and 100 percent of patients were alive. These results were shared today during an oral presentation at the 30^th European Hematology Association (EHA) 2025 Congress.

The safety profile of this combination therapy showed cytokine release syndrome (CRS) being low grade and no discontinuations due to treatment-emergent adverse events (TEAEs). The most common TEAEs were neutropenia (74 percent), anemia (68 percent), and thrombocytopenia (68 percent). CRS occurred in 52 percent; all were low grade (1/2) and resolved. One patient had immune effector cell-associated neurotoxicity syndrome (ICANS; grade 1), which resolved. No clinical tumor lysis syndrome was observed. Infections occurred in 18 patients (58 percent); five (16 percent) had serious infections. There were no Grade 5 TEAEs.

“These results are particularly encouraging because many of the patients in this study had high-risk disease, having progressed rapidly after initial treatment,” said Raul Cordoba, MD, PhD, Head of the Lymphoma Unit at the Fundacion Jimenez Diaz University Hospital, Madrid, Spain. “This combination therapy of epcoritamab plus rituximab, ifosfamide, carboplatin, and etoposide (R-ICE) offers a potential new treatment option for patients with relapsed/refractory diffuse large B-cell lymphoma, providing high response rates and a bridge to potentially curative autologous stem cell transplantation."

Among patients in the study who progressed within 12 months after first-line treatment (n=20), epcoritamab in combination with R-ICE demonstrated an 85 percent ORR and 55 percent CR. Patients in the study who progressed after 12 months from first-line therapy experienced a 91 percent ORR and 82 percent CR. Additionally, patients with one prior line of therapy experienced an 88 percent ORR and 68 percent CR, and patients who were treated with more than one prior line of therapy experienced an 83 percent ORR and 50 percent CR.