MiR-5100 promotes osteogenic differentiation by targeting Tob2
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MicroRNAs have emerged as pivotal regulators in various physiological and pathological processes, including osteogenesis. Here we discuss the contribution of miR-5100 to osteoblast differentiation and mineralization. We found that miR-5100 was upregulated during osteoblast differentiation in ST2 and MC3T3-E1 cells. Next, we verified that miR-5100 can promote osteogenic differentiation with gain-of-function and loss-of-function experiments. Target prediction analysis and experimental validation demonstrated that Tob2, which acts as a negative regulator of osteogenesis, was negatively regulated by miR-5100. Furthermore, we confirmed that the important bone-related transcription factor osterix, which can be degraded by binding to Tob2, was influenced by miR-5100 during osteoblast differentiation. Collectively, our results revealed a new molecular mechanism that fine-tunes osteoblast differentiation through miR-5100/Tob2/osterix networks.
KeywordsmiR-5100 Osteoblast differentiation Mineralization Tob2
This study was supported by the National Natural Science Foundation of China (81371909) and the Key Projects in the National Science and Technology Pillar Program during the Twelfth Five-Year Plan period (2013BAI07B01).
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Conflict of interest
The authors declare that they have no conflict of interest.
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