Abstract
To detect the expression of miR-146a in patients with AML, and to evaluate the relationship between miR-146a expression level and clinical characteristics, treatment response, EFS and OS. 154 patients with newly diagnosed AML were enrolled in AML group, 50 controls (patients with thrombocytopenic purpura or voluntary donor of bone marrow) were enrolled in control group. The miR-146a expression levels in bone marrow mononuclear cells was detected by RT-PCR between 2 group. AML patients were treated with chemotherapeutic drugs, and their clinical response and survivals were assessed. The expression level of MiR-146a in AML group was significantly lower than that in control group. The ROC showed that miR-146a could distinguish the patients in AML and control group better (area under curve 0.819 (95%CI: 0.761-0.877). Meanwhile, the proportion of good and moderate good prognosis (P＜0.001), proportion of WBC count ≤15.2×109/L (P＜0.05), CR rate (P＜0.05), EFS (P＜0.01) and OS (P＜0.01) in patients with high miR-146a expression were higher than those in patients with low miR-146a expression. Cox's model showed that miR-146a expression level positively realated with incressed EFS and OS. MiR-146a is downregulated in AML patients, which might be served as a biomarker for predicting risk and prognosis of AML patients.
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