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• W975729763 abstract "Aberrant methylation of let-7a-3 promoter has been observed in various malignancies. However, the clinical relevance of let-7a-3 methylation remains poorly known in acute myeloid leukemia (AML). This study was to investigate the let-7a-3 methylation status and to explore its clinical significance in AML. let-7a-3 promoter was significantly hypomethylated in AML patients compared to controls (median 4.51 vs 0.49) (P = 0.0003). Receiver operating characteristic curve (ROC) analysis discriminated all patients or cytogenetically normal patients from controls with an areas under the ROC curve (AUC) of 0.737 or 0.783, respectively (P < 0.001). Patients with favorable/intermediate karyotypes had significantly higher let-7a-3 unmethylation than controls. Patients with DNMT3A mutations had a trend of high level of let-7a-3 unmethylation than did those with wild-type DNMT3A (median 6.76 vs 3.66, P = 0.096). There was no significant difference in overall survival between patients with and without hypomethylated let-7a-3 (median 12 vs 5 months, P = 0.103). No correlation was observed between the level of let-7a-3 expression and let-7a-3 unmethylation in AML samples (R = 0.197, P = 0.150). However, the level of let-7a-3 expression was increased in a dose-dependent manner in THP-1 line treated with 5-aza-dC, while the methylation density of let-7a-3 promoter decreased with 5-aza-dC dose. Our findings suggest that let-7a-3 hypomethylation is associated with favorable and intermediate karyotypes but not a prognostic predictor for AML patients. Let-7a-3 expression may be partially regulated by promoter methylation." @default.
• W975729763 created "2016-06-24" @default.
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• W975729763 date "2015-07-31" @default.
• W975729763 modified "2023-10-08" @default.
• W975729763 title "Let-7a-3 hypomethylation is associated with favorable/intermediate karyotypes but not with survival in acute myeloid leukemia" @default.
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• W975729763 doi "https://doi.org/10.1007/s13277-015-3734-2" @default.
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