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Encouraging Overall Response Rates in Relapsed Lymphoma for MT-601

Marker Therapeutics (MRKR) | August 26, 2025

By Fiona Wilson

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Marker Therapeutics provided an update on the Phase 1 APOLLO study showcasing encouraging overall response rates in relapsed B cell lymphoma.

66% of Non-Hodgkin Lymphoma (NHL) patients achieved objective response rates, with 50% showing complete response (CR).

The study demonstrated a favorable safety profile with no dose limiting toxicities or immune-effector cell associated neurotoxicity syndrome observed in the dose escalation cohort.

Objective Response Rates

66% of NHL patients achieved objective response rates with 50% showing CR.

Safety Profile

No dose limiting toxicities or neurotoxicity syndrome observed in the dose escalation cohort.

Dose Expansion Phase

Investigating MT-601 at pre-specified maximum dose in Diffuse Large B Cell Lymphoma patients.

Live Webcast

A live webcast will be held to discuss the study results at 8:30 a.m. ET.

  • MT-601 showed promise in heavily pre-treated lymphoma patients who had relapsed after previous therapies, including CAR-T cells and bispecific antibodies.
  • The data indicated durable responses with continued responses lasting up to 24 months in some patients, addressing a critical unmet need in lymphoma treatment.

Marker Therapeutics' Phase 1 APOLLO study results highlight the potential of MT-601 in addressing the unmet needs of heavily pre-treated lymphoma patients, paving the way for further advancements in immunotherapy for hematological malignancies.