Innate Pharma Highlights Preclinical Antitumor Activity of IPH6501 in Diffuse Large B-Cell Lymphoma and Follicular Lymphoma at the 2025 European Hematology Association (EHA) Congress

Regulatory News:

Innate Pharma SA (Euronext Paris: IPH; Nasdaq: IPHA) (“Innate” or the “Company”) today announced the presentation of preclinical data for IPH6501, its proprietary ANKET targeting CD20 currently under investigation in a Phase 1/2 study in relapsed and/or refractory (R/R) B-cell non-Hodgkin lymphoma (B-NHL) (NCT06088654), at the European Hematology Association (EHA) Congress 2025, taking place June 12-15 in Milan, Italy.

R-CHOP is an established standard of care for treatment-naïve patients with diffuse large B cell lymphoma (DLBCL) and follicular lymphoma (FL), two subtypes of B-NHL. The treatment landscape continues to evolve with novel approaches including T cell engagers, antibody-drug conjugates, their combination with standard of care therapies, and CAR-T cells. Yet, there remains an unmet medical need for patients ineligible, refractory to, or relapsing from these therapies.

In preclinical in vitro models, IPH6501 demonstrated potent NK cell proliferation and tumor cell killing activity in DLBCL and FL patient samples, supporting its therapeutic potential in these indications. In preclinical in vivo xenografted mouse tumor models, IPH6501 showed strong activity in a rituximab-resistant model — even in the presence of rituximab highlighting their combination potential. Additionally, when combined with R-CHOP, IPH6501 showed enhanced antitumor efficacy, leading to tumor eradication that was maintained after treatment discontinuation. These findings underscore the potential of IPH6501 in improving standard-of-care R-CHOP treatment in previously untreated DLBCL and FL patients and support further evaluation of additional combination strategies in B-NHL.

"Patients with R/R DLBCL and FL continue to face significant unmet medical needs. The encouraging activity observed in preclinical models with IPH6501, including in rituximab-resistant settings, suggests its potential to offer new treatment options for B-cell non-Hodgkin lymphoma. The enhanced antitumor activity in combination with R-CHOP could support further investigation in untreated patients. These findings support further clinical development aimed at improving outcomes in this challenging patient population," commented Dr Sonia Quaratino, Chief Medical Officer of Innate Pharma.