Front Endocrinol:Chordin-Like 1通过增强BMP4-SMAD通路改善骨髓间充质干细胞的成骨作用

2019-06-30 xiaotaiyang MedSci原创

Front Endocrinol:Chordin-Like 1通过增强BMP4-SMAD途径改善骨髓间充质干细胞的成骨作用Chordin-like 1(CHRDL1)是一种分泌型糖蛋白,具有重复的富含半胱氨酸的结构域,可与BMPs家族配体结合。虽然据报道它在几个系统中发挥重要作用,但CHRDL1对人骨髓间充质干细胞(hBMSCs)成骨的确切作用仍有待探索。本研究旨在探讨CHRDL1在hBMSCs成

Front Endocrinol:Chordin-Like 1通过增强BMP4-SMAD途径改善骨髓间充质干细胞的成骨作用

Chordin-like 1(CHRDL1)是一种分泌型糖蛋白,具有重复的富含半胱氨酸的结构域,可与BMPs家族配体结合。虽然据报道它在几个系统中发挥重要作用,但CHRDL1对人骨髓间充质干细胞(hBMSCs)成骨的确切作用仍有待探索。本研究旨在探讨CHRDL1在hBMSCs成骨分化中的作用及其潜在的分子机制。

我们发现CHRDL1在hBMSCs成骨过程中上调,rhBMP-4给药可以剂量和时间依赖性方式增强CHRDL1 mRNA的表达。敲除CHRDL1不影响hBMSCs增殖,但抑制BMP-4依赖性成骨分化,显示成骨标志物的mRNA表达水平降低和矿化减少。相反,CHRDL1的过表达增强了BMP-4诱导的hBMSCs的成骨分化。此外,通过将CHRDL1基因修饰的hBMSCs移植到裸鼠体内实验,有缺陷的股骨模型在CHRDL1过表达组中显示出更高的新骨形成,但与对照组相比,CHRDL1敲低组中的新骨形成更低。与骨形成率一致,CHRDL1过表达组中有缺陷股骨的新骨形成区域中CHRDL1蛋白表达增加,而CHRDL1敲低组中CHRDL1蛋白表达与对照组相比减少。这些表明CHRDL1可以在体内促进成骨细胞分化。此外,机制研究表明,CHRDL1在hBMSCs的成骨分化过程中改善了BMP-4诱导的SMAD1/5/9磷酸化。此外,BMP受体I型抑制剂LDN-193189可阻断成骨分化的促进和CHRDL1对SMAD磷酸化的激活。

总之,我们的研究结果表明,CHRDL1可以通过增强BMP-4-SMAD1/5/9通路的激活来促进hBMSCs的成骨分化。

原始出处:

Liu T, Li B, et al., Chordin-Like 1 Improves Osteogenesis of Bone Marrow Mesenchymal Stem Cells Through Enhancing BMP4-SMAD Pathway. Front Endocrinol (Lausanne). 2019 Jun 12;10:360. doi: 10.3389/fendo.2019.00360. eCollection 2019.

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    2020-03-24 HNYYM
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    2019-07-02 wshxjq
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    2019-07-03 独孤立克

    干细胞是热点,但是进入临床仍然需要时间和临床疗效验证哦

    0

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    2019-07-02 zhaojie88
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    2019-07-02 江川靖瑶