Publication date: Available online 30 December 2016
Source:Experimental Cell Research
Author(s): Xue-Feng Shi, Hua Wang, Fan-Xuan Kong, Qin-Qin Xu, Feng-Jun Xiao, Yue-Feng Yang, Ri-Li Ge, Li-Sheng Wang
MicroRNAs (miRNAs) regulate the hypoxia-induced erythroid differentiation of hematopoietic cells. In this study, we identified that miR-486 was a rapid response miRNA to hypoxia in erythroleukemia TF-1 cells. Hypoxia exposure increased both intracellular and exosomal miR-486 levels of TF-1 cells. Ectopic miR-486 expression enhanced the growth and erythroid differentiation of TF-1 cells, whereas miR-486 inhibition suppressed their growth and erythroid differentiation. Treatment of TF-1 and cord blood CD34+ cells with exogenous exosomes containing miR-486 resulted in an increase of intracellular miR-486 level and enhanced erythroid differentiation. Furthermore, we identified that Sirt1 is a miR-486 target gene which modulates hypoxia-induced erythroid differentiation of TF-1 cells. Thus we identified a novel exosomal miRNA regulatory network that contributes to hypoxia-induced erythroid differentiation of hematopoietic cells.
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