Abstract
Osteoactivin (OA) plays a key role in osteogenic differentiation. miR-26b is elevated in the bone formation process of BMSCs, but whether it is involved in this process is unclear. Bone formation is regulated by FLT3/AXL signaling pathway, which may be a potential target of miR-26b. qRT-PCR detected miR-26b mRNA levels and bone formation-related genes or FLT3/AXL signaling pathway-related genes. Bone formation was analyzed by staining and FLT3/AXL signaling was evaluated along with analysis of miR-26b’s relation with LT3/AXL. miR-26b was significantly elevated in OA-induced bone formation of BMSCs, which can be promoted by miR-26b mimics. When miR-26b was overexpressed, FLT3/AXL signaling pathway was activated. miR-26b can ameliorate Dex-induced osteo-inhibition. miR-26b promotes bone formation of BMSCs by directly targeting FLT3/AXL signaling pathway, suggesting that miR-26b might be a target for inducing osteogenic differentiation.
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