miR-34a-5p inhibits the erythroid differentiation of K562 cells / 基础医学与临床

ABSTRACT

Objective To study the effects of microRNA-34a-5p on erythroid differentiation of K562 cells.Methods K562 cells were transfected with the microRNA-34a-5p mimics and antisense inhibitors specifically targeting mi-croRNA-34a-5p, respectively.The effects of over-expression or knocking-down of microRNA-34a-5p were exam-ined by Quantitative RT-PCR.Flow cytometry was performed to detect specific surface marker of erythroid cells . The benzidine staining assay was used to access the differentiation of K 562 cells.Western blot was performed to de-tect miRNA targets.Results microRNA-34a-5p was down-regulated at the early stage of K562 erythroid differenti-ation.Over-expression of microRNA-34a-5p in K562 cells attenuates erythroid differentiation , in contrast, inhibi-tion of microRNA-34a-5p accelerates erythroid pheotypes in K562 cells.c-MYB was found to be the direct target of microRNA-34 a-5 p in erythroid cells .Conclusions microRNA-34 a-5 p regulates early erythroid differentiation of K562 cells via repressing c-MYB.