BACKGROUND:Long non-coding RNAs (lncRNAs) have became the hot topic in current studies and play an important role in the tumorigenesis. However, lncRNAs involved in the osteoblast differentiation remain poorly reported. OBJECTIVE:To investigate the role of human LncRNAs in osteogenic differentiation of C3H10T1/2 cells induced by bone morphogenetic protein-2 and explore action mechanism. METHODS:The induction of bone morphogenetic protein-2 was validated by alkaline phosphatase staining and the expression of corresponding genes was detected. The lncRNA expression profile was analyzed using the Arraystar lncRNA array in C3H10T1/2 MSCs undergoing early osteoblast differentiation. The expression with or without bone morphogenetic protein-2 induction was compared with high-flux sequencing, and the down-regulated genes were screened. The effect of lncRNA overexpression on osteogenic differentiation of C3H10T1/2 cells induced by bone morphogenetic protein-2 was observed. RESULTS AND CONCLUSION:The bone morphogenetic protein-2 induced C3H10T1/2 cells led to increased alkaline phosphatase activity. After 72 hours of bone morphogenetic protein-2 induction, alkaline phosphatase, Id1,osteocalcin, Runx2, sp7 expression were increased (P<0.05). There were 24 down-regulated lncRNAs identified between bone morphogenetic protein-2 treated and untreated groups, the decrease of expression was 1.5 folds, and among them, only AK035085 contained intron. Compared with control group with no AK03508 expression, over-expression lncRNA AK035085 decreased the expression of alkaline phosphatase, Id1, osteocalcin, Runx2, sp7 (P<0.05). Experimental findings indicate that bone morphogenetic protein-2 induces osteogenic differentiation of C3H10T1/2 cells and AK035085 inhibits the osteogenic differentiation.%背景：人类长链非编码RNA是现今的研究热点，已有研究报道其在肿瘤发生中的作用机制，但其在成骨分化方面的机制并不明确。 目的：观察人类长链非编码RNA在经骨形态发生蛋白2诱导小鼠C3H10T1/2细胞成骨分化中的作用，并探讨其分子机制。 方法：首先进行碱性磷酸酶染色和成骨指标基因检测。对C3H10T1/2细胞在骨形态发生蛋白2诱导下的成骨分化过程长链非编码RNA表达变化进行芯片分析。采用高通量测序比较骨形态发生蛋白2诱导组和未经骨形态发生蛋白2诱导组的表达变化，筛选出表达下降的基因。过表达相应长链非编码RNA后观察对骨形态发生蛋白2诱导成骨分化的影响。 结果与结论：骨形态发生蛋白2诱导C3H10T1/2细胞导致碱性磷酸酶活性增加。骨形态发生蛋白2诱导72 h后，碱性磷酸酶、Id1、骨钙素、Runx2、sp7表达上升(P<0.05)。未诱导C3H10T1/2细胞与骨形态发生蛋白2诱导细胞芯片杂交后结果比较，下降达1.5倍的长链非编码RNAs有24条，其中只有AK035085有内含子。与未过表达AK035085的对照组相比，骨形态发生蛋白2诱导72 h后AK035085过表达的C3H10T1/2细胞碱性磷酸酶、Id1、骨钙素、Runx2、sp7表达均下降(P<0.05)。提示骨形态发生蛋白2可刺激C3H10T1/2细胞发生成骨分化，AK035085可能对C3H10T1/2细胞的成骨分化存在抑制作用。
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