icovamenib (BMF-219)

We critically evaluate the preclinical and clinical development of menin inhibitors, including revumenib, ziftomenib, bleximinib, and icovamenib, summarizing efficacy signals in relapsed/refractory disease, safety profiles, and emerging resistance mechanisms. Special attention is given to combination strategies with venetoclax, FLT3 inhibitors, chemotherapy, and epigenetic agents, which aim to enhance response durability and mitigate resistance. Finally, we discuss ongoing clinical trials, unresolved challenges in patient selection and sequencing, and future directions for integrating menin inhibition into precision-based treatment paradigms for acute leukemia.

P2, N=60, Recruiting, Biomea Fusion Inc.

P2, N=60, Recruiting, Biomea Fusion Inc.

This manuscript reviews the molecular rationale of menin inhibition for aberrant homeobox/myeloid ectopic insertion site 1 (HOX/MEIS1)-driven gene expression and leukemogenesis, clinical trial outcomes, and safety data for menin inhibitors, with a focus on recently FDA-approved revumenib and several other agents in development, ziftomenib (KO-539), bleximenib (JNJ-75276617), and icovamenib (BMF-219). We also focused our discussion on future directions to include resistance mechanisms, biomarker identification and monitoring strategies, and combination therapies. Menin inhibition is now being clinically integrated into relapsed/refractory and frontline treatment settings.

P1, N=60, Completed, Biomea Fusion Inc. | Active, not recruiting --> Completed

P1, N=60, Active, not recruiting, Biomea Fusion Inc. | Recruiting --> Active, not recruiting

Next-generation agents (ziftomenib, bleximenib, enzomenib, BMF-219) have displayed similar composite complete remission rates (20-35%) and overall response rates (45-65%) in heavily pretreated KMT2Ar and NPM1m acute myeloid leukemia (AML) with measurable residual disease (MRD) negativity and prolonged overall survival (5-7 months)...Acquired mutations in the menin gene described in 39% of post-revumenib relapses have not been identified following other inhibitors (ziftomenib, bleximenib), prompting new questions about resistance mechanisms. These promising results swiftly led to the launch of multiple trials of menin inhibitors combined with intensive (cytarabine and anthracycline) and nonintensive (venetoclax and hypomethylating) chemotherapy backbones...Ongoing/pending phase 3 trials will clarify whether menin blockade should be incorporated into frontline and maintenance regimens for all patients with KMT2A rearranged or NPM1 mutant disease. In the current era, menin inhibition remains a key pillar of the success of precision medicine for AML therapy.

P1, N=60, Recruiting, Biomea Fusion Inc.

P2, N=37, Terminated, Biomea Fusion Inc. | Active, not recruiting --> Terminated; Sponsor made a business decision to terminate the study based on prioritization of portfolio.

P1/2, N=443, Completed, Biomea Fusion Inc. | Active, not recruiting --> Completed

Currently, six menin inhibitors are in clinical evaluation as monotherapy or in combination regimens: revumenib, ziftomenib, bleximenib (previously JNJ-75276617), enzomenib (previously DSP-5336), DS-1594, and BMF-219. We discuss their efficacy, safety profiles, and potential roles within the current treatment algorithm. The continued clinical evaluation of menin inhibitors may redefine treatment paradigms for NPM1m and KMT2Ar AML and other acute leukemia with the aberrant MEIS1-HOXA axis, offering new hope for patients with limited therapeutic options.

P2, N=37, Active, not recruiting, Biomea Fusion Inc. | N=190 --> 37 | Trial primary completion date: Aug 2025 --> May 2025