Abstract
The expression pattern of microRNAs (miRNAs) and their potential target genes were investigated in acute promyelocytic leukemia (APL) cell line NB4 cells during all-trans-retinoid acid (ATRA) treatment by using a miRNA microarrays platform and real-time quantitative PCR (RTQ-PCR). MiR-146a as one of the miRNAs down-regulated by ATRA during APL differentiation was identified. Direct interaction between miR146a and its predictive target gene Smad4 were confirmed by Luciferase assay. Down-regulation of miR-146a and upregulation of Smad4 at protein levels were demonstrated. These data suggested that miR-146a might influence proliferation of APL cells through TGF-β1/Smad signal transduction pathway during ATRA induction.
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Acknowledgments
We thank Hui-juan Cui for RTQ-PCR technical assistance. This work was supported by Shanghai Municipal Commission of Sciences and Technology Grant 09ZR1418400 and Shanghai Municipal Education Commission Grant 06BZ031.
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Zhong, H., Wang, Hr., Yang, S. et al. Targeting Smad4 links microRNA-146a to the TGF-β pathway during retinoid acid induction in acute promyelocytic leukemia cell line. Int J Hematol 92, 129–135 (2010). https://doi.org/10.1007/s12185-010-0626-5
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DOI: https://doi.org/10.1007/s12185-010-0626-5