与成骨谱系定向相关的 microRNA 特征。

MicroRNA signature associated with osteogenic lineage commitment.

机构信息

Department of Biotechnology, College of Science, University of Tehran, Tehran, Iran.

出版信息

Mol Biol Rep. 2012 Jul;39(7):7569-81. doi: 10.1007/s11033-012-1591-2. Epub 2012 Feb 16.

Abstract

Cell-based approaches offer a potential therapeutic strategy for appropriate bone manufacturing. Capable of differentiating into multiple cell types especially osteoblasts spontaneously, unrestricted somatic stem cell (USSC) seems to be a suitable candidate. Recent studies have shown the involvement of microRNAs in several biological processes. miRNA microarray profiling was applied in order to identify the osteo-specific miRNA signature. Prior to this analysis, osteogenic commitment of osteoblasts was evaluated by measuring ALPase activity, biomineralization, specific staining and evaluation of some main osteogenic marker genes. To support our findings, various in silico explorations (for both putative targets and signaling pathways) and empirical analyses (miRNA transfections followed by qPCR of osteogenic indicators and ALPase activity measurement) were carried out. The function of GSK-3b inhibitor was also studied to investigate the role of WNT in osteogenesis. Transient modulation of multiple osteo-miRs (such as mir-199b, 1274a, 30b) with common targets (such as BMPR, TCFs, SMADs) as mediators of osteogenic pathways including cell-cell interactions, WNT and TGF-beta pathways, suggests a mechanism for rapid induction of the osteogenesis as an anti-miRNA therapy. The results of this research have identified the miRNA signature which regulates the osteogenesis mechanism in USSC. To conclude, our study reveals more details about the allocation of USSCs into osteogenic lineage through modulatory effect of miRNAs on targets and pathways required for creating a tissue-specific phenotype and may aid in future clinical interventions.

摘要

基于细胞的方法为合适的骨制造提供了一种潜在的治疗策略。具有自发分化为多种细胞类型尤其是成骨细胞的能力,无限制体干细胞 (USSC) 似乎是一个合适的候选者。最近的研究表明 microRNAs 参与了几个生物学过程。应用 miRNA 微阵列分析来确定成骨特异性 miRNA 特征。在进行此分析之前,通过测量 ALPase 活性、生物矿化、特异性染色和评估一些主要成骨标记基因来评估成骨细胞的成骨细胞分化。为了支持我们的发现,进行了各种计算探索(针对潜在靶标和信号通路)和经验分析(miRNA 转染,然后 qPCR 检测成骨指标和 ALPase 活性测量)。还研究了 GSK-3b 抑制剂的功能,以研究 WNT 在成骨中的作用。瞬时调节多个成骨-miRs(如 mir-199b、1274a、30b)及其共同靶标(如 BMPR、TCFs、SMADs)作为包括细胞-细胞相互作用、WNT 和 TGF-beta 途径在内的成骨途径的介质,表明作为抗 miRNA 治疗的快速诱导成骨的机制。这项研究的结果确定了调节 USSC 成骨机制的 miRNA 特征。总之,我们的研究通过 miRNA 对靶标和途径的调节作用揭示了更多关于 USSCs 分配到成骨谱系的细节,这些靶标和途径是创建组织特异性表型所必需的,并且可能有助于未来的临床干预。

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