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Myelomonocytic and monocytic acute myeloid leukemia demonstrate comparable poor outcomes with venetoclax-based treatment: a monocentric real-world study

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Abstract

Venetoclax (VEN), a BCL-2 inhibitor, has transformed treatment strategies for elderly and unfit acute myeloid leukemia (AML) patients by significantly improving response rates and survival. However, the predictive factors for VEN efficacy differ from traditional chemotherapy. The clinical relevance of the FAB (French-American-British) monocytic subtype, including M4 and M5, has been debated as a marker for VEN resistance. This real-world study examined 162 newly diagnosed (ND) and 85 relapsed/refractory (R/R) AML patients who received VEN-based therapy at West China Hospital, Sichuan University, from January 2019 to January 2023. We retrospectively collected clinical and treatment data from electronic medical records. The median age of the cohort was 55.5 years (range: 16.5–83.5). The composite complete remission (cCR) rate in the entire cohort was 60.7%. Specifically, among newly diagnosed (ND) patients, FAB monocytic subtypes exhibited lower cCR compared to non-monocytic subtypes (55.1% vs. 76.3%, P = 0.007). Additionally, there were no significant differences observed between M4 and M5 subtypes, both in the ND group (61.7% vs. 40.9%, p = 0.17) and the R/R group (38.2% vs. 40%, p > 0.9). Furthermore, the median follow-up was 238 (range: 7–1120) days. ND patients with monocytic subtypes had shorter overall survival compared to non-monocytic subtypes (295 days vs. not reached, p = 0.0017). Conversely, R/R patients showed no such difference (204 vs. 266 days, p = 0.72). In summary, our study suggests that the FAB monocytic subtype can predict VEN resistance and shorter survival in ND AML patients. Moreover, there is no significant distinction between M4 and M5 subtypes.

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Acknowledgements

We thank all study participants for their support.

Funding

The authors disclosed receipt of the following financial support for the research, authorship, and/or publication of this article. This work supported by the National Natural Science Foundation of China (82370171) and Sichuan Provincial Academic and Technical Support Funding Project, Grant/Award Number: 2022YFS0191, 00402053A29RY.

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Contributions

Study conception and design: L.Z., J.J.Y., M.R.C., and Y.W.; development of methodology: L.Z., J.J.Y., and M.R.C.; acquisition of data: L.Z., and J.J.Y.; statistical analysis: L.Z., J.J.Y., X.R.X., and Y.W.; writing:L.Z.; reviewing and editing: J.J.Y., L.Z., X.R.X., and Y.W.; directing and coordinating diagnostic and therapeutic interventions for patients: H.B.M., T.N., Y.P.G., X.C.C., and J.Z.L.. all authors contributed to the article and approved the submitted version.

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Correspondence to Yu Wu.

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The study was approved by the West China Hospital Institutional Review Board and in accordance with the Helsinki declaration.

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Zhao, L., Yang, J., Chen, M. et al. Myelomonocytic and monocytic acute myeloid leukemia demonstrate comparable poor outcomes with venetoclax-based treatment: a monocentric real-world study. Ann Hematol 103, 1197–1209 (2024). https://doi.org/10.1007/s00277-024-05646-7

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