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The t(8;21)(q22;q22) translocation is the most common chromosomal translocation in acute myeloid leukemia (AML), and it gives rise to acute myeloid gene 1 (AML1)-myeloid transforming gene 8 (ETO)-positive AML, which has a relatively favorable prognosis. CD48 is a favorable prognosis factor that is downregulated in AML patients. AML can escape immunosurveillance of natural killer (NK) cells by decreasing CD48 expression. The correlation between AML1-ETO and CD48-mediated immune evasion is not well understood. Here, we show that AML1-ETO can increase CD48 expression, which is regulated by AML1-ETO/P300-mediated acetylation. AML1-ETO can inhibit AML immune escape from NK cell recognition and killing by increasing CD48 expression. This study describes a novel mechanism by which AML1-ETO can inhibit AML immune escape by increasing CD48 acetylation, thereby providing new evidence about AML patients with AML1-ETO oncogene infusion having better clinical outcomes.

Citation

Zhiding Wang, Wei Guan, Mengzhen Wang, Jinghong Chen, Linlin Zhang, Yang Xiao, Lixin Wang, Yonghui Li, Li Yu. AML1-ETO inhibits acute myeloid leukemia immune escape by CD48. Leukemia & lymphoma. 2021 Apr;62(4):937-943

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PMID: 33225787

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