Liu Guanqi, Lu Yeming, Mai Zhihui, Liu Runheng, Peng Zhuli, Chen Lin, Chen Zheng, Wang Ruizhi, Ai Hong
Department of Stomatology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong, China.
Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University and Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, Guangdong, China.
Stem Cells Int. 2019 Apr 4;2019:7547506. doi: 10.1155/2019/7547506. eCollection 2019.
MicroRNAs (miRNAs) have been widely demonstrated to interact with multiple cellular signaling pathways and to participate in a wide range of physiological processes. Estradiol-17 (E2) is the most potent and prevalent endogenous estrogen that plays a vital role in promoting bone formation and reducing bone resorption. Currently, little is known about the regulation of miRNAs in E2-induced osteogenic differentiation. In the present study, the primary bone marrow mesenchymal stem cells from rats (rBMSCs) were isolated and incubated with E2, followed by miRNA profiling. The microarray showed that 29 miRNAs were differentially expressed in response to E2 stimulation. Further verification by real-time reverse-transcriptase polymerase chain reaction revealed that E2 enhanced the expression of let-7b and miR-25 but suppressed the miR-30b expression. Moreover, a gain-of-function experiment confirmed that miR-30b negatively regulated the E2-induced osteogenic differentiation. These data suggest an important role of miRNAs in osteogenic differentiation.
微小RNA(miRNA)已被广泛证明可与多种细胞信号通路相互作用,并参与广泛的生理过程。雌二醇-17(E2)是最有效且普遍存在的内源性雌激素,在促进骨形成和减少骨吸收方面发挥着至关重要的作用。目前,关于miRNA在E2诱导的成骨分化中的调控作用知之甚少。在本研究中,分离大鼠原代骨髓间充质干细胞(rBMSC)并用E2孵育,随后进行miRNA谱分析。微阵列显示,有29种miRNA在E2刺激下差异表达。通过实时逆转录聚合酶链反应进一步验证发现,E2增强了let-7b和miR-25的表达,但抑制了miR-30b的表达。此外,功能获得实验证实miR-30b负向调节E2诱导的成骨分化。这些数据表明miRNA在成骨分化中起重要作用。