Cantilena, Sandra; Alameri, Mohamed; Che, Noelia; Williams, Owen; de Boer, Jasper; (2024) Synergistic Strategies for KMT2A-Rearranged Leukemias: Beyond Menin Inhibitor. Cancers , 16 (23) , Article 4017. 10.3390/cancers16234017.

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Abstract

KMT2A-rearranged leukemias are a highly aggressive subset of acute leukemia, characterized by poor prognosis and frequent relapses despite intensive treatment. Menin inhibitors, which target the critical KMT2A–menin interaction driving leukemogenesis, have shown promise in early clinical trials. However, resistance to these inhibitors, often driven by menin mutations or alternative oncogenic pathways, remains a significant challenge. This review explores combination therapies aimed at overcoming resistance and improving patient outcomes. Potential strategies include inhibiting DOT1L, a histone methyltransferase essential for KMT2A-driven transcription, and BRD4, a regulator of transcriptional super-enhancers. Additionally, targeting MYC, a key oncogene frequently upregulated in KMT2A-rearranged leukemia, offers another approach. Direct inhibition of KMT2A-fusion proteins and c-MYB, a transcription factor critical for leukemic stem cell maintenance, is also explored. By integrating these diverse strategies, we propose a comprehensive therapeutic paradigm that targets multiple points of the leukemic transcriptional and epigenetic network. These combination approaches aim to disrupt key oncogenic pathways, reduce resistance, and enhance treatment efficacy, ultimately providing more durable remissions and improved survival for patients with KMT2A-rearranged leukemias.

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