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Cell子刊:中国科学家找到利用脂肪干细胞治疗骨缺陷疾病的新靶点

2016-07-27 佚名 生物谷

近日,北京大学口腔医学院周永胜研究小组在国际学术期刊Stem Cell Reports上发表了一项最新研究进展,他们发现一种microRNA能够通过影响脂肪干细胞的信号调控网络促进骨生成,该研究为利用脂肪干细胞治疗骨质疏松等疾病提供了新的方向。组织工程技术已经成为骨再生医学领域最具治疗前景手段之一。人类脂肪来源干细胞作为一种间充质干细胞在组织工程领域得到越来越多的关注。深入了解脂肪干细胞向骨方向分

近日,北京大学口腔医学院周永胜研究小组在国际学术期刊Stem Cell Reports上发表了一项最新研究进展,他们发现一种microRNA能够通过影响脂肪干细胞的信号调控网络促进骨生成,该研究为利用脂肪干细胞治疗骨质疏松等疾病提供了新的方向。

组织工程技术已经成为骨再生医学领域最具治疗前景手段之一。人类脂肪来源干细胞作为一种间充质干细胞在组织工程领域得到越来越多的关注。深入了解脂肪干细胞向骨方向分化的分子调控网络是开发干细胞治疗方法的重要基础。

该研究发现MiR-34a在人类脂肪来源干细胞(hASC)向骨方向分化的过程中会出现表达上调。在体外过表达MiR-34a能够显著增加hASC的碱性磷酸酶活性,矿化能力同时还会促进骨生成相关基因的表达。在hASC中过表达MiR-34a再进行异位移植也会观察到骨形成能力增强。

研究人员还从机制上进行了进一步分析,他们发现MiR-34a能够从转录后水平抑制RBP2基因的表达,他们在RBP2的3`UTR位置找到了MiR-34a的可能结合位点。除此之外研究人员还发现MiR-34a可以下调NOTCH1和CYCLIN D1的表达,从而通过靶向RBP2, NOTCH1和CYCLIN D1上调骨生成过程中关键转录因子RUNX2的表达。

该研究结果表明MiR-34a通过影响RBP2/NOTCH1/CYCLIN D1调控网络促进了hASC向骨方向的分化,因此以MiR-34a可能是骨再生医学研究领域的一个新靶点。

原始出处

Cong Fan1, 4, 5, Lingfei Jia2, 3, 4, 5, Yunfei Zheng2, 4, Chanyuan Jin1, 4, Yunsong Liu1, 4, Hao Liu3, 4, Yongsheng Zhou.MiR-34a Promotes Osteogenic Differentiation of Human Adipose-Derived Stem Cells via the RBP2/NOTCH1/CYCLIN D1 Coregulatory Network.Stem Cell Reports.2016

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    2016-09-01 维他命
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    2016-07-29 lsndxfj
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