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STM:糖尿病患者骨折后愈合能力差的机制被破译

2017-01-13 佚名 生物谷

根据斯坦福大学医学院的一项最新研究,一种刺激骨干细胞活性的蛋白能够让发生骨折的糖尿病小鼠恢复得更好。研究人员在糖尿病小鼠模型和糖尿病患者的骨组织样本中观察到骨干细胞活性的下降,而这种蛋白能够抵消干细胞活性的下降。他们希望这一发现能够促进开发新方法帮助糖尿病患者从骨折中更好的恢复。相关研究结果发表在国际学术期刊Science Translational Medicine上。全世界有几亿人受到


根据斯坦福大学医学院的一项最新研究,一种刺激骨干细胞活性的蛋白能够让发生骨折的糖尿病小鼠恢复得更好。研究人员在糖尿病小鼠模型和糖尿病患者的骨组织样本中观察到骨干细胞活性的下降,而这种蛋白能够抵消干细胞活性的下降。他们希望这一发现能够促进开发新方法帮助糖尿病患者从骨折中更好的恢复。

相关研究结果发表在国际学术期刊Science Translational Medicine上。

全世界有几亿人受到糖尿病困扰,这一数字还在逐年增加。糖尿病除了会引起餐后血糖的危险波动,还会导致其他许多症状,包括软组织损伤和骨折愈合能力受损。其中的精确分子机制还没有得到充分了解。

在之前的一项研究中,研究人员曾经在小鼠的骨组织中发现一群骨干细胞,这些成体干细胞可以形成骨骼系统的所有成分。去除这些成体干细胞,小鼠骨折后愈合的能力会受到严重损伤。

在这项研究中,研究人员使用了一种2型糖尿病小鼠模型,小鼠在大约4周龄开始出现糖尿病症状,但是在糖尿病发生之前,小鼠骨折愈合的效率与野生型小鼠基本没有差别。与之相比,在糖尿病发生之后小鼠的骨密度明显低于对照组,发生骨损伤后愈合能力明显变差,研究人员在骨折七天后对比了骨干细胞的数量,发现糖尿病小鼠的骨干细胞数量明显少于对照小鼠。

研究人员通过一系列实验排除了导致干细胞数量下降的系统原因也证实骨干细胞本身具有正常功能。随后他们对干细胞所处微环境进行了分析,发现糖尿病小鼠体内一类叫做hedgehog的信号蛋白水平明显更低,这个家族的蛋白在许多生物学过程中发挥重要作用,包括胚胎发育和组织再生。

研究人员猜测人为阻断hedgehog信号途径也能够损伤非糖尿病小鼠的骨愈合能力,而实验结果也验证了这一猜测,并且向糖尿病小鼠发生骨折的局部环境中加入hedgehog信号蛋白能够恢复小鼠的骨愈合能力。

最后研究人员又在糖尿病患者和非糖尿病患者的骨组织样本中检测了hedgehog信号途径中一些重要蛋白的表达,发现人类组织的分析结果完全符合他们在小鼠模型中观察到的现象。

这些结果表明直接靶向骨干细胞hedgehog信号途径中的一些分子可能对骨损伤后愈合有促进作用,但是在转化到临床应用之前还需要进行更多研究。


原始出处:

Tevlin R, Seo EY, Marecic O, McArdle A, Tong X, Zimdahl B, Malkovskiy A, Sinha R, Gulati G, Li X, Wearda T, Morganti R, Lopez M, Ransom RC, Duldulao CR, Rodrigues M, Nguyen A, Januszyk M, Maan Z, Paik K, Yapa KS, Rajadas J, Wan DC, Gurtner GC, Snyder M, Beachy PA, Yang F, Goodman SB, Weissman IL, Chan CK, Longaker MT.Pharmacological rescue of diabetic skeletal stem cell niches.Sci Transl Med. 2017 Jan 11;9(372). pii: eaag2809. doi: 10.1126/scitranslmed.aag2809.

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  1. [GetPortalCommentsPageByObjectIdResponse(id=1677989, encodeId=507c16e7989d6, content=<a href='/topic/show?id=29a8168130f' target=_blank style='color:#2F92EE;'>#STM#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=65, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=16813, encryptionId=29a8168130f, topicName=STM)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=d76127619556, createdName=gdsun, createdTime=Thu Sep 07 03:54:00 CST 2017, time=2017-09-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=171570, encodeId=05c11e1570e4, content=学习了,很好, beContent=null, objectType=article, channel=null, level=null, likeNumber=94, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=d32a1717978, createdName=1debbfffm06(暂无匿称), createdTime=Fri Jan 20 10:49:51 CST 2017, time=2017-01-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=170726, encodeId=05621e0726d8, content=原来是这样啊, beContent=null, objectType=article, channel=null, level=null, likeNumber=85, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20170121/IMG5882B3D1CEC308322.jpg, createdBy=806c2008228, createdName=iceflamen, createdTime=Mon Jan 16 13:04:52 CST 2017, time=2017-01-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1474114, encodeId=807614e4114fd, content=<a href='/topic/show?id=935fe6718e3' target=_blank style='color:#2F92EE;'>#糖尿病患者#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=56, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=76718, encryptionId=935fe6718e3, topicName=糖尿病患者)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=a38f7243741, createdName=xue8604, createdTime=Sun Jan 15 09:54:00 CST 2017, time=2017-01-15, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=170389, encodeId=c4c61e038933, content=非常好, beContent=null, objectType=article, channel=null, level=null, likeNumber=84, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=eebc1967617, createdName=一句飘过, createdTime=Sat Jan 14 23:47:36 CST 2017, time=2017-01-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=170356, encodeId=a3701e0356d2, content=然后作用呢, beContent=null, objectType=article, channel=null, level=null, likeNumber=93, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=62d381629, createdName=yafeiliutjh, createdTime=Sat Jan 14 20:38:28 CST 2017, time=2017-01-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=170202, encodeId=b2171e020203, content=学习新知识谢谢分享。, beContent=null, objectType=article, channel=null, level=null, likeNumber=78, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cdnapi.center.medsci.cn/medsci/head/2017/04/21/72142930668371951a41ef4ea4b233e6.jpg, createdBy=dcbc1715228, createdName=刘煜, createdTime=Sat Jan 14 06:35:15 CST 2017, time=2017-01-14, status=1, ipAttribution=)]
    2017-09-07 gdsun
  2. [GetPortalCommentsPageByObjectIdResponse(id=1677989, encodeId=507c16e7989d6, content=<a href='/topic/show?id=29a8168130f' target=_blank style='color:#2F92EE;'>#STM#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=65, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=16813, encryptionId=29a8168130f, topicName=STM)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=d76127619556, createdName=gdsun, createdTime=Thu Sep 07 03:54:00 CST 2017, time=2017-09-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=171570, encodeId=05c11e1570e4, content=学习了,很好, beContent=null, objectType=article, channel=null, level=null, likeNumber=94, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=d32a1717978, createdName=1debbfffm06(暂无匿称), createdTime=Fri Jan 20 10:49:51 CST 2017, time=2017-01-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=170726, encodeId=05621e0726d8, content=原来是这样啊, beContent=null, objectType=article, channel=null, level=null, likeNumber=85, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20170121/IMG5882B3D1CEC308322.jpg, createdBy=806c2008228, createdName=iceflamen, createdTime=Mon Jan 16 13:04:52 CST 2017, time=2017-01-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1474114, encodeId=807614e4114fd, content=<a href='/topic/show?id=935fe6718e3' target=_blank style='color:#2F92EE;'>#糖尿病患者#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=56, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=76718, encryptionId=935fe6718e3, topicName=糖尿病患者)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=a38f7243741, createdName=xue8604, createdTime=Sun Jan 15 09:54:00 CST 2017, time=2017-01-15, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=170389, encodeId=c4c61e038933, content=非常好, beContent=null, objectType=article, channel=null, level=null, likeNumber=84, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=eebc1967617, createdName=一句飘过, createdTime=Sat Jan 14 23:47:36 CST 2017, time=2017-01-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=170356, encodeId=a3701e0356d2, content=然后作用呢, beContent=null, objectType=article, channel=null, level=null, likeNumber=93, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=62d381629, createdName=yafeiliutjh, createdTime=Sat Jan 14 20:38:28 CST 2017, time=2017-01-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=170202, encodeId=b2171e020203, content=学习新知识谢谢分享。, beContent=null, objectType=article, channel=null, level=null, likeNumber=78, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cdnapi.center.medsci.cn/medsci/head/2017/04/21/72142930668371951a41ef4ea4b233e6.jpg, createdBy=dcbc1715228, createdName=刘煜, createdTime=Sat Jan 14 06:35:15 CST 2017, time=2017-01-14, status=1, ipAttribution=)]
    2017-01-20 1debbfffm06(暂无匿称)

    学习了,很好

    0

  3. [GetPortalCommentsPageByObjectIdResponse(id=1677989, encodeId=507c16e7989d6, content=<a href='/topic/show?id=29a8168130f' target=_blank style='color:#2F92EE;'>#STM#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=65, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=16813, encryptionId=29a8168130f, topicName=STM)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=d76127619556, createdName=gdsun, createdTime=Thu Sep 07 03:54:00 CST 2017, time=2017-09-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=171570, encodeId=05c11e1570e4, content=学习了,很好, beContent=null, objectType=article, channel=null, level=null, likeNumber=94, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=d32a1717978, createdName=1debbfffm06(暂无匿称), createdTime=Fri Jan 20 10:49:51 CST 2017, time=2017-01-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=170726, encodeId=05621e0726d8, content=原来是这样啊, beContent=null, objectType=article, channel=null, level=null, likeNumber=85, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20170121/IMG5882B3D1CEC308322.jpg, createdBy=806c2008228, createdName=iceflamen, createdTime=Mon Jan 16 13:04:52 CST 2017, time=2017-01-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1474114, encodeId=807614e4114fd, content=<a href='/topic/show?id=935fe6718e3' target=_blank style='color:#2F92EE;'>#糖尿病患者#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=56, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=76718, encryptionId=935fe6718e3, topicName=糖尿病患者)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=a38f7243741, createdName=xue8604, createdTime=Sun Jan 15 09:54:00 CST 2017, time=2017-01-15, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=170389, encodeId=c4c61e038933, content=非常好, beContent=null, objectType=article, channel=null, level=null, likeNumber=84, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=eebc1967617, createdName=一句飘过, createdTime=Sat Jan 14 23:47:36 CST 2017, time=2017-01-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=170356, encodeId=a3701e0356d2, content=然后作用呢, beContent=null, objectType=article, channel=null, level=null, likeNumber=93, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=62d381629, createdName=yafeiliutjh, createdTime=Sat Jan 14 20:38:28 CST 2017, time=2017-01-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=170202, encodeId=b2171e020203, content=学习新知识谢谢分享。, beContent=null, objectType=article, channel=null, level=null, likeNumber=78, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cdnapi.center.medsci.cn/medsci/head/2017/04/21/72142930668371951a41ef4ea4b233e6.jpg, createdBy=dcbc1715228, createdName=刘煜, createdTime=Sat Jan 14 06:35:15 CST 2017, time=2017-01-14, status=1, ipAttribution=)]
    2017-01-16 iceflamen

    原来是这样啊

    0

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  5. [GetPortalCommentsPageByObjectIdResponse(id=1677989, encodeId=507c16e7989d6, content=<a href='/topic/show?id=29a8168130f' target=_blank style='color:#2F92EE;'>#STM#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=65, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=16813, encryptionId=29a8168130f, topicName=STM)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=d76127619556, createdName=gdsun, createdTime=Thu Sep 07 03:54:00 CST 2017, time=2017-09-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=171570, encodeId=05c11e1570e4, content=学习了,很好, beContent=null, objectType=article, channel=null, level=null, likeNumber=94, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=d32a1717978, createdName=1debbfffm06(暂无匿称), createdTime=Fri Jan 20 10:49:51 CST 2017, time=2017-01-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=170726, encodeId=05621e0726d8, content=原来是这样啊, beContent=null, objectType=article, channel=null, level=null, likeNumber=85, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20170121/IMG5882B3D1CEC308322.jpg, createdBy=806c2008228, createdName=iceflamen, createdTime=Mon Jan 16 13:04:52 CST 2017, time=2017-01-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1474114, encodeId=807614e4114fd, content=<a href='/topic/show?id=935fe6718e3' target=_blank style='color:#2F92EE;'>#糖尿病患者#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=56, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=76718, encryptionId=935fe6718e3, topicName=糖尿病患者)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=a38f7243741, createdName=xue8604, createdTime=Sun Jan 15 09:54:00 CST 2017, time=2017-01-15, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=170389, encodeId=c4c61e038933, content=非常好, beContent=null, objectType=article, channel=null, level=null, likeNumber=84, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=eebc1967617, createdName=一句飘过, createdTime=Sat Jan 14 23:47:36 CST 2017, time=2017-01-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=170356, encodeId=a3701e0356d2, content=然后作用呢, beContent=null, objectType=article, channel=null, level=null, likeNumber=93, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=62d381629, createdName=yafeiliutjh, createdTime=Sat Jan 14 20:38:28 CST 2017, time=2017-01-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=170202, encodeId=b2171e020203, content=学习新知识谢谢分享。, beContent=null, objectType=article, channel=null, level=null, likeNumber=78, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cdnapi.center.medsci.cn/medsci/head/2017/04/21/72142930668371951a41ef4ea4b233e6.jpg, createdBy=dcbc1715228, createdName=刘煜, createdTime=Sat Jan 14 06:35:15 CST 2017, time=2017-01-14, status=1, ipAttribution=)]
    2017-01-14 一句飘过

    非常好

    0

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    2017-01-14 yafeiliutjh

    然后作用呢

    0

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    2017-01-14 刘煜

    学习新知识谢谢分享。

    0

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