Differentiation:人MSC的BMP-2可抑制NR2F1介导的成骨细胞分化下调

2018-11-20 MedSci MedSci原创

软骨内骨化是形成长骨的过程;长骨形成的过程受许多因素的调节,例如转录因子、细胞因子和细胞外基质分子。人体激素核受体(hHNR)是配体调节的转录因子家族,其被类固醇激素(例如雌激素和孕酮)和各种脂溶性信号(包括视黄酸,氧固醇和甲状腺激素)激活。我们先前研究的全基因组芯片数据显示大多数hHNR在hMSCS中的成骨细胞分化期间上调。NR2F1是成骨过程中表达最高的hHNR之一,NR2F1属于类固醇/甲状

软骨内骨化是形成长骨的过程;长骨形成的过程受许多因素的调节,例如转录因子、细胞因子和细胞外基质分子。人体激素核受体(hHNR)是配体调节的转录因子家族,其被类固醇激素(例如雌激素和孕酮)和各种脂溶性信号(包括视黄酸,氧固醇和甲状腺激素)激活。

我们先前研究的全基因组芯片数据显示大多数hHNR在hMSCS中的成骨细胞分化期间上调。NR2F1是成骨过程中表达最高的hHNR之一,NR2F1属于类固醇/甲状腺激素核受体超家族。NR2F1被指定为孤儿核受体,因为其配体未知。NR2F1具有多种作用,包括细胞分化、癌症进展、中枢和外周神经发生。鉴定参与成骨细胞分化的信号传导网络在编排骨生物学中的新治疗和临床应用中是重要的。该研究旨在鉴定NR2F1在成骨细胞分化中介导的信号传导网络的改变。

结果显示,siRNA介导的NR2F1下调损害了hBMSC-TERT向成骨细胞的分化;基因表达结果证实了成骨细胞标志物如RUNX2、ALPL、OSC和BSP的表达下调。全基因表达分析显示,大多数下调基因与成骨细胞分化相关(DDIT3,BMP2)。通路分析揭示了明显下调的信号传导通路,包括TGFβ通路和MAPK通路。在成骨细胞分化期间与TGFβ1和BMP-2组合的NR2F1转染细胞的功能研究显示TGFβ1不能恢复成骨细胞分化,而BMP-2在NR2F1 siRNA转染的细胞中拯救成骨细胞分化。

因此,我们的结果显示BMP-2可以干预NR2F1下调的信号传导通路以恢复成骨细胞分化。

原始出处:

Manikandan M, Abuelreich S, et al., NR2F1 mediated down-regulation of osteoblast differentiation was rescued by bone morphogenetic protein-2 (BMP-2) in human MSC. Differentiation. 2018 Oct 29;104:36-41. doi: 10.1016/j.diff.2018.10.003.

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    2019-11-03 HNYYM
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    2019-03-24 isabellayj
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    2018-11-22 一天没事干

    很好的学习机会

    0

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    2018-11-22 zhaojie88
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    2018-11-22 huanbaofeng
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