Abstract
Many studies have confirmed that overexpressed WT1 exists in leukemic cells, especially in AML. However, the immunophenotypic features of this sort of leukemic cells remain to be unclarified. We retrospectively analyzed the immunophenotype of 283 newly diagnosed AML patients with intermediated and poor cytogenetic risk to evaluate the correlation between phenotype and WT1 overexpression. EVI1 transcripts, KMT2A-PTD, FLT3-ITD, and NPM1 mutations were simultaneously assessed. Our results revealed that overexpressed WT1 was significantly associated with the expression of CD117, CD13, and CD123. Besides, leukemic cells with WT1 overexpression also lacked lymphoid and myeloid differentiation-related markers. FAB subtype M2 patients had higher WT1 levels, compared with other FAB subtype. Multivariate analysis was proved that NPM1 mutation, M2 subtype, and the expression of CD123 were independently associated with WT1 overexpression. These indicated that AML with overexpressed WT1 was proliferated and blocked in the early stage of AML development. It presumably provided some clues to detect overexpressed WT1 cells via multiparameter flow cytometry. CD123-targeted drugs might become one of the alternative treatments for patients with WT1 overexpression.
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The authors thank Wei-Hua Shi, Lin-Lin He, Le Hao, and Jing Wu for their assistance.
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Xiao-Rui Wang and Yan-Rong Liu designed, wrote, and interpreted data. Yan Chang, Xiao-Ying Yuan, and Ya-Zhe Wang performed experiments and provided technical support. Ya-Zhen Qin, Guo-Rui Ruan, and Yue-Yun Lai performed experiments and analyzed data. All authors approved the manuscript. Yan-Rong Liu supervised the study.
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All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (the Ethics Committee of Peking University People’s Hospital) and with the Helsinki Declaration of 1975, as revised in 2008. Since this is a retrospective study, formal informed consent is not required.
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Wang, XR., Chang, Y., Yuan, XY. et al. Overexpressed WT1 exhibits a specific immunophenotype in intermediate and poor cytogenetic risk acute myeloid leukemia. Ann Hematol 99, 215–221 (2020). https://doi.org/10.1007/s00277-019-03808-6
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DOI: https://doi.org/10.1007/s00277-019-03808-6