On June 13, 2025 Innate Pharma SA (Euronext Paris: IPH; Nasdaq: IPHA) ("Innate" or the "Company") reported 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) (Free EHA Whitepaper) Congress 2025, taking place June 12-15 in Milan, Italy (Press release, Innate Pharma, JUN 13, 2025, View Source [SID1234653877]).

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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.

The poster will be available in the publication section of Innate Pharma’s website.

Abstract details
Antitumor characterization of IPH6501, a novel il2v-armed tetraspecific NK cell engager targeting CD20 B cells, in DLBCL and FL patient samples, and in preclinical combination with R-CHOP
Abstract Code: PS2004
Session: Poster session 2
Session Date/Time: Saturday, June 14, 2025, 18:30 – 19:30 CEST

About ANKET

ANKET (Antibody-based NK cell Engager Therapeutics) is Innate’s proprietary platform for developing next-generation, multi-specific natural killer (NK) cell engagers to treat certain types of cancer. This versatile, fit-for-purpose technology is creating an entirely new class of molecules to induce synthetic immunity against cancer.

About IPH6501

IPH6501 is the first Antibody-based NK cell Engager Therapeutic to co-engage activating receptors on NK cells (NKp46 and CD16), IL-2R (but not the alpha subunit) through a variant of human IL-2, and a tumor antigen (CD20) via a single molecule. This unique multispecific design provides targeted proliferation and activation signals to NK cells, promoting their cytotoxic activity against CD20 expressing malignant cells.

IPH6501 has shown better antitumor efficacy compared to approved benchmark antibodies in preclinical tumor models (Demaria, EHA (Free EHA Whitepaper) 2023, Carrette, SITC (Free SITC Whitepaper) 2024, Demaria et al, Science Immunology 2024).

IPH6501 is currently being evaluated in a Phase 1/2 multicenter trial (NCT06088654), investigating the safety and tolerability of IPH6501 in patients with relapsed and/or refractory CD20-expressing B-cell Non-Hodgkin’s Lymphoma.