Abstract
Purpose
The aim of this study was to investigate roles of microRNA (miR)-183 in pediatric acute myeloid leukemia (AML).
Methods
miR-183 expression in bone marrow and patients’ sera of childhood AML was detected by real-time quantitative PCR. Functions of miR-183 in malignant phenotypes of two leukemia cell lines were then evaluated. Additionally, putative targets of miR-183 were predicted using three miRNA target prediction algorithms and validated by luciferase reporter assay. Clinical relevance of miR-183 and its target gene were further determined.
Results
miR-183 expression in bone marrow and patients’ sera of childhood AML was both significantly higher than those in the corresponding normal controls (both P < 0.001). Enforced expression of miR-183 dramatically enhanced cell proliferation and G1/S transition, but inhibited cell apoptosis of leukemia cells. Bioinformatics prediction and luciferase reporter assay identified programmed cell death 6 (PDCD6) as a direct target gene of miR-183. Moreover, high serum miR-183 combined with low serum PDCD6 mRNA was significantly associated with French–American–British classification subtype M7 (P = 0.01) and unfavorable karyotypes (P = 0.006). Further multivariate analysis identified the combination of serum miR-183 and PDCD6 levels as an independent prognostic factor for both relapse-free and overall survivals. Functionally, re-introduction of PDCD6 markedly reversed the effects of miR-183 in cell cycle, proliferation and apoptosis of two leukemia cell lines.
Conclusion
Combined serum miR-183 and PDCD6 mRNA may serve as a novel prognostic biomarker for pediatric AML. Interestingly, miR-183 may function as an oncogene and may enhance cell proliferation by targeting PDCD6, implying a potential therapeutic target for this malignancy.
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Wang, X., Zuo, D., Yuan, Y. et al. MicroRNA-183 promotes cell proliferation via regulating programmed cell death 6 in pediatric acute myeloid leukemia. J Cancer Res Clin Oncol 143, 169–180 (2017). https://doi.org/10.1007/s00432-016-2277-2
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DOI: https://doi.org/10.1007/s00432-016-2277-2