FUS1 is a tumor suppressor gene that has been found to be frequently lost in a variety of solid tumors. In this study, we aimed to investigate the expression status of the FUS1 gene in acute myeloid leukemia (AML), as well as its clinical significance. We further explored the correlation between the expression of FUS1 and miR-378 in AML. We detected expression of the FUS1 transcript in bone marrow mononuclear cells from 23 controls and 158 newly diagnosed AML patients by real-time quantitative polymerase chain reaction. Downregulated FUS1 expression was found in 139 out of 158 (87.97%) AML cases; this rate was significantly lower than that in all 23 controls (p = 0.012). Receiver operating characteristic curve analysis revealed that the FUS1 transcript level could discriminate AML patients from controls effectively (area under the ROC curve = 0.663). Kaplan-Meier analysis demonstrated that non-M3-AML patients with a low FUS1 expression had a shorter overall survival (p = 0.049) and leukemia-free survival (p = 0.051) than those with a high FUS1 expression. Furthermore, we studied the correlation between the expression of FUS1 and miR-378 in 53 newly diagnosed AML patients. We found that the correlation coefficient was –0.346, which showed that FUS1 and miR-378 were negatively correlated in AML patients (p = 0.011). These results indicate that the low expression of FUS1 is a common molecular event in AML.

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