Sci Rep:miR-146a对脂肪间充质干细胞成骨和骨再生的影响

2019-03-23 不详 网络

越来越多的证据表明,骨形态发生蛋白2(BMP2)与microRNA(miRNA)协调,形成调节间充质干细胞(MSCs)成骨的细胞内网络。本研究旨在鉴定大鼠脂肪来源的间充质干细胞(ADSCs)在BMP2诱导的成骨过程中的特异性miRNA,我们选择最显著下调的miRNA miR-146a,系统地研究其在调节骨生成和骨再生中的作用。结果显示,过表达miR-146a显著抑制ADSC成骨,而敲低miR-14

越来越多的证据表明,骨形态发生蛋白2(BMP2)与microRNA(miRNA)协调,形成调节间充质干细胞(MSCs)成骨的细胞内网络。本研究旨在鉴定大鼠脂肪来源的间充质干细胞(ADSCs)在BMP2诱导的成骨过程中的特异性miRNA,我们选择最显著下调的miRNA miR-146a,系统地研究其在调节骨生成和骨再生中的作用。

结果显示,过表达miR-146a显著抑制ADSC成骨,而敲低miR-146a极大地促进了这一过程。果蝇母体对抗decapentaplegic蛋白4(SMAD4),BMP信号通路中的重要共激活因子,是miR-146a的直接靶标,miR-146a通过与SMAD4 mRNA 3'-非翻译区(3'-UTR)的相互作用对SMAD4产生抑制作用。 此外,敲低SMAD4减弱了miR-146a抑制剂促进ADSC成骨的能力。接下来,转导的ADSCs与聚(sebacoyl diglyceride)(PSeD)多孔支架结合用于修复临界大小的颅骨缺损,miR-146a抑制剂的治疗大大增强了ADSC介导的骨再生,在新形成的骨中SMAD4,Runt相关转录因子2(Runx2)和Osterix的表达水平更高。

总之,我们的研究表明,miR-146a在体外和体内均负调节ADSCs的成骨和骨再生。

原始出处:

Qing Xie, Wei Wei, et al., Effects of miR-146a on the osteogenesis of adipose-derived mesenchymal stem cells and bone regeneration. Sci Rep. 2017; 7: 42840.

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    2020-02-14 feifers
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    2019-10-20 smallant2002
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    2019-03-25 zhaojie88
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    2019-03-25 lsj630
  7. [GetPortalCommentsPageByObjectIdResponse(id=2036290, encodeId=b35b20362901e, content=<a href='/topic/show?id=07f11183151' target=_blank style='color:#2F92EE;'>#miR-146a#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=11831, encryptionId=07f11183151, topicName=miR-146a)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=1f1d390, createdName=feifers, createdTime=Fri Feb 14 17:25:00 CST 2020, time=2020-02-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1958008, encodeId=2e3519580080c, content=<a href='/topic/show?id=8cef8440856' target=_blank style='color:#2F92EE;'>#脂肪间充质干细胞#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=31, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=84408, encryptionId=8cef8440856, topicName=脂肪间充质干细胞)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=395f25, createdName=bioon1, createdTime=Wed Dec 25 20:25:00 CST 2019, time=2019-12-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1815480, encodeId=f3d21815480dd, content=<a href='/topic/show?id=ae359e231d4' target=_blank style='color:#2F92EE;'>#间充质干细#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=26, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=97231, encryptionId=ae359e231d4, topicName=间充质干细)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=4b632500090, createdName=h.y200607_23674418, createdTime=Fri Feb 14 17:25:00 CST 2020, time=2020-02-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1930693, encodeId=18ca1930693f8, content=<a href='/topic/show?id=22f61180211' target=_blank style='color:#2F92EE;'>#miR#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=23, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=11802, encryptionId=22f61180211, topicName=miR)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=0a27288, createdName=smallant2002, createdTime=Sun Oct 20 19:25:00 CST 2019, time=2019-10-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1352084, encodeId=60d1135208494, content=<a href='/topic/show?id=e95954093cd' target=_blank style='color:#2F92EE;'>#成骨#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=27, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=54093, encryptionId=e95954093cd, topicName=成骨)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=4c37265, createdName=zhaojie88, createdTime=Mon Mar 25 04:25:00 CST 2019, time=2019-03-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1472183, encodeId=d78114e2183ee, content=<a href='/topic/show?id=d068101610b9' target=_blank style='color:#2F92EE;'>#骨再生#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=26, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=101610, encryptionId=d068101610b9, topicName=骨再生)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=a4cf7208806, createdName=lsj630, createdTime=Mon Mar 25 04:25:00 CST 2019, time=2019-03-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=363423, encodeId=6b5436342389, content=学习了,长知识, beContent=null, objectType=article, channel=null, level=null, likeNumber=59, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20220115/46bcf39c32de4aa6b45c5f9d66c8ee77/6cb4a20c55bb4b7691122f47747bfca2.jpg, createdBy=9dad1662329, createdName=1ddf0692m34(暂无匿称), createdTime=Sat Mar 23 14:16:11 CST 2019, time=2019-03-23, status=1, ipAttribution=)]
    2019-03-23 1ddf0692m34(暂无匿称)

    学习了,长知识

    0