Abstract
This study explored whether teriparatide promotes BMSCs proliferation and differentiation via downregulating miR-298 and provided a basis for bone repair. Based on the microarray analysis after teriparatide treatment, qRT-PCR verified the differentially expressed miRNAs and the osteogenic differentiation was assessed by transfection of miRNA overexpression plasmids and miRNA inhibitors. miRNA array analysis and qRT-PCR verification showed that miR-298 was significantly downregulated during teriparatide-induced BMSCs differentiation. miR-298 overexpression significantly inhibited ALP and OPN expression which was promoted by transfection of miR-298 inhibitor. miR-298 is a negative regulator of BMSCs differentiation induced by teriparatide. Dlx5 is the target of miR-298. Inhibition of DLX5 expression by miR-298 was involved in the osteogenic differentiation of BMSCs. In conclusion, miR-298 negatively regulates the differentiation of BMSCs induced by teriparatide by targeting DLX5, providing a possible therapeutic target for bone tissue repair and regeneration.
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