Bone:研究揭示MVNP在Paget病患者中的作用机制

2017-10-22 MedSci MedSci原创

佩吉特骨病(PDB)的特征是异常破骨细胞(OCL)与骨过度吸收。本研究既往发现PDB患者的OCL中存在麻疹病毒核壳蛋白(MVNP)转录物。此外,体外和体内研究发现MVNP可刺激PDB患者OCL的形成。然而,MVNP在PDB患者中诱导过量OCL/骨吸收活性的机制目前尚不清楚。研究人员使用微阵列分析鉴定了MVNP诱导的NFAM1的表达。因此,研究人员假设NFN1的MVNP诱导增强了PDB中的OCL分化

佩吉特骨病(PDB)的特征是异常破骨细胞(OCL)与骨过度吸收。本研究既往发现PDB患者的OCL中存在麻疹病毒核壳蛋白(MVNP)转录物。此外,体外和体内研究发现MVNP可刺激PDB患者OCL的形成。然而,MVNP在PDB患者中诱导过量OCL/骨吸收活性的机制目前尚不清楚。

研究人员使用微阵列分析鉴定了MVNP诱导的NFAM1的表达。因此,研究人员假设NFN1的MVNP诱导增强了PDB中的OCL分化和骨吸收。结果显示,MVNP转导至正常人PBMC在没有RANKL治疗的情况下并没有增加NFAM1 mRNA的表达。此外,来自PDB患者的骨髓细胞NFAM1 mRNA的表达水平升高。有趣的是,NFAM1的shRNA抑制可抑制小鼠骨髓培养物中MVNP诱导的OCL分化和骨吸收活性。

活细胞宽场荧光显微镜分析显示,MVNP诱导细胞内Ca2 +波动和水平在NFAM1抑制前破骨细胞中明显降低。此外,蛋白质印迹分析表明,靶向NFAM1的shRNA抑制剂可抑制前成骨细胞中MVNP刺激的PLCγ、钙调神经磷酸酶和Syk的活化。进一步分析显示,NFAM1的表达可控制NFATc1,一种关键转录因子表达,和MVNP转导前成骨细胞中的核易位。

因此,该研究结果表明,NFAM1信号轴的MVNP调节在PDB患者的OCL形成和骨吸收活动中起重要作用。

原始出处:


Yuvaraj Sambandam, Kumaran Sundaram, et al., NFAM1 signaling enhances osteoclast formation and bone resorption activity in Paget's disease of bone. Bone. Author manuscript; available in PMC 2017 Sep 6.

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    2018-05-21 minzju5052
  2. [GetPortalCommentsPageByObjectIdResponse(id=1786063, encodeId=1bd11e8606366, content=<a href='/topic/show?id=0202136e1e4' target=_blank style='color:#2F92EE;'>#Paget#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=40, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=13671, encryptionId=0202136e1e4, topicName=Paget)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2978132, createdName=minzju5052, createdTime=Mon May 21 05:06:00 CST 2018, time=2018-05-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1786073, encodeId=cd9a1e86073c4, content=<a href='/topic/show?id=e047136e481' target=_blank style='color:#2F92EE;'>#Paget病#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=34, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=13674, encryptionId=e047136e481, topicName=Paget病)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=583c133, createdName=yuandd, createdTime=Mon Apr 30 13:06:00 CST 2018, time=2018-04-30, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1915164, encodeId=36ba1915164d3, content=<a href='/topic/show?id=05343619cf' target=_blank style='color:#2F92EE;'>#Bone#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=30, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3619, encryptionId=05343619cf, topicName=Bone)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=7dc7399, createdName=apoenzyme, createdTime=Sat Feb 24 06:06:00 CST 2018, time=2018-02-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=255106, encodeId=9b052551064b, content=学习了受益匪浅, beContent=null, objectType=article, channel=null, level=null, likeNumber=55, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/ajNVdqHZLLDicHg2ldsSNmib46PmdzpO7CQEmPjuULp1v45zPWwMYhrnXgvl3OtmUCZSQfgITWn96X9moL94nUGA/0, createdBy=28072041016, createdName=131****1460, createdTime=Sun Oct 22 13:56:02 CST 2017, time=2017-10-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=255089, encodeId=064c25508927, content=不错的.学习了.谢谢分享!, beContent=null, objectType=article, channel=null, level=null, likeNumber=42, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/mStl88fu4NdqKgfW3nMpOkC3jXxiaW2po0PtglY5ZuVjERqKADW4HyMI8bcZXWlKgH7tEP9ULBoBzuQMibia4pr1s9rQPqLvqQJ/0, createdBy=e8c02060444, createdName=中医痴, createdTime=Sun Oct 22 12:49:16 CST 2017, time=2017-10-22, status=1, ipAttribution=)]
    2018-04-30 yuandd
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    2018-02-24 apoenzyme
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    2017-10-22 131****1460

    学习了受益匪浅

    0

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    2017-10-22 中医痴

    不错的.学习了.谢谢分享!

    0

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