JBMR Plus:BMP2诱导的骨缺损愈合与固定器刚度的相互作用调节基质形成

2018-10-05 MedSci MedSci原创

成功的骨折愈合需要机械和生物信息之间的紧密相互作用。体外研究表明,机械负荷可调节骨形态发生蛋白(BMP)信号。然而,在体内大块骨缺损再生的早期阶段,导致这种机械感觉的潜在机制仍然未知。 我们研究了BMP2刺激和机械边界条件在大鼠临界尺寸股骨缺损模型(5 mm)中的相互作用,该模型用三种截然不同的外固定器刚性稳定。用装载在可吸收胶原海绵上的5μgrhBMP2处理骨缺损。通过二次谐波生成成像监测

成功的骨折愈合需要机械和生物信息之间的紧密相互作用。体外研究表明,机械负荷可调节骨形态发生蛋白(BMP)信号。然而,在体内大块骨缺损再生的早期阶段,导致这种机械感觉的潜在机制仍然未知。

我们研究了BMP2刺激和机械边界条件在大鼠临界尺寸股骨缺损模型(5 mm)中的相互作用,该模型用三种截然不同的外固定器刚性稳定。用装载在可吸收胶原海绵上的5μgrhBMP2处理骨缺损。通过二次谐波生成成像监测早期基质排列。在第7天和第14天通过组织学监测骨缺损和连续愈合,并在术后第10,21和42天通过体内microCT监测。在第42天收集股骨用于评估离体失效的扭转载荷。

结果显示,第14天在组织水平可见组间差异,microCT检测显示明显的骨形成。在组织学上,我们观察到在柔性固定时延长的软骨形成,而在刚性和半刚性固定之后,骨生成开始得更早。在稍后的时间点,在柔性固定时骨组织形成增强,而其他组已经显示出组织成熟的迹象。基于基因表达谱,我们分析了机械生物学相互作用。在第3天,这些分析揭示了表达模式的差异,特别是参与细胞外基质形成的基因。与固定器硬度相关的基因调节在第7天显著,包括与免疫过程和细胞收缩相关的基因。在3D生物反应器中进一步研究并确认了负载对基质收缩的影响。

总之,我们证明了影响BMP2诱导的骨缺陷愈合的机械条件的早期发作,并揭示了与细胞外基质组织和收缩相关的基因调控网络,这似乎直接影响骨愈合的结果。

原始出处:

Schwarz C, Ott CE, et al., The Interaction of BMP2-Induced Defect Healing in Rat and Fixator Stiffness Modulates Matrix Alignment and Contraction. JBMR Plus. 2018 Apr 17;2(3):174-186. doi: 10.1002/jbm4.10031. eCollection 2018 May.

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    2018-12-04 HNYYM
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    2018-10-07 lfcmxl
  7. [GetPortalCommentsPageByObjectIdResponse(id=2029659, encodeId=466d202965938, content=<a href='/topic/show?id=fedb14394f4' target=_blank style='color:#2F92EE;'>#Plus#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=46, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=14394, encryptionId=fedb14394f4, topicName=Plus)], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/L2dMhrxjvSWuPWKZZP1I83Rw21EWia7LVTYJibLQkb4oTibrYLwhnAXntTBWR3FruIzKfNMiaBwhYV0AKNmiaNxfialg/132, createdBy=6ea92500119, createdName=ms9608593228839890, createdTime=Wed May 22 10:37:00 CST 2019, time=2019-05-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1757124, encodeId=bf7b1e571243f, content=<a href='/topic/show?id=103b421e0e8' target=_blank style='color:#2F92EE;'>#基质#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=22, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=42170, encryptionId=103b421e0e8, topicName=基质)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=281337296540, createdName=ms7899726347904398, createdTime=Sun Jun 09 23:37:00 CST 2019, time=2019-06-09, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1780406, encodeId=17d11e8040648, content=<a href='/topic/show?id=7591358092' target=_blank style='color:#2F92EE;'>#BMP2#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=37, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3580, encryptionId=7591358092, topicName=BMP2)], attachment=null, authenticateStatus=null, createdAvatar=http://thirdqq.qlogo.cn/qqapp/1103841572/B389FA68ECBF51BE2FE14093CF61F6AE/100, createdBy=eb8e2500096, createdName=夏天与十三菇凉, createdTime=Tue May 21 11:37:00 CST 2019, time=2019-05-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1909260, encodeId=e8de1909260e3, content=<a href='/topic/show?id=8039e2512e8' target=_blank style='color:#2F92EE;'>#相互作用#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=30, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=72512, encryptionId=8039e2512e8, topicName=相互作用)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=f73a255, createdName=medscijoin, createdTime=Wed Aug 07 08:37:00 CST 2019, time=2019-08-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1634047, encodeId=0ab0163404e41, content=<a href='/topic/show?id=596635e549' target=_blank style='color:#2F92EE;'>#BMP#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=21, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3575, encryptionId=596635e549, topicName=BMP)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=d95322064897, createdName=HNYYM, createdTime=Tue Dec 04 20:37:00 CST 2018, time=2018-12-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1419273, encodeId=f3b114192e38d, content=<a href='/topic/show?id=2e2e10182602' target=_blank style='color:#2F92EE;'>#骨缺损#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=25, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=101826, encryptionId=2e2e10182602, topicName=骨缺损)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=51173492599, createdName=lfcmxl, createdTime=Sun Oct 07 11:37:00 CST 2018, time=2018-10-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1471607, encodeId=030e14e160754, content=<a href='/topic/show?id=c0132410554' target=_blank style='color:#2F92EE;'>#互作#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=28, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=24105, encryptionId=c0132410554, topicName=互作)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=4dc87121468, createdName=ylz8405, createdTime=Sun Oct 07 11:37:00 CST 2018, time=2018-10-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=348067, encodeId=f57634806e0e, content=学习了,长知识, beContent=null, objectType=article, channel=null, level=null, likeNumber=26, 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=Fri Oct 05 20:50:08 CST 2018, time=2018-10-05, status=1, ipAttribution=)]
    2018-10-07 ylz8405
  8. [GetPortalCommentsPageByObjectIdResponse(id=2029659, encodeId=466d202965938, content=<a href='/topic/show?id=fedb14394f4' target=_blank style='color:#2F92EE;'>#Plus#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=46, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=14394, encryptionId=fedb14394f4, topicName=Plus)], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/L2dMhrxjvSWuPWKZZP1I83Rw21EWia7LVTYJibLQkb4oTibrYLwhnAXntTBWR3FruIzKfNMiaBwhYV0AKNmiaNxfialg/132, createdBy=6ea92500119, createdName=ms9608593228839890, createdTime=Wed May 22 10:37:00 CST 2019, time=2019-05-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1757124, encodeId=bf7b1e571243f, content=<a href='/topic/show?id=103b421e0e8' target=_blank style='color:#2F92EE;'>#基质#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=22, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=42170, encryptionId=103b421e0e8, topicName=基质)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=281337296540, createdName=ms7899726347904398, createdTime=Sun Jun 09 23:37:00 CST 2019, time=2019-06-09, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1780406, encodeId=17d11e8040648, content=<a href='/topic/show?id=7591358092' target=_blank style='color:#2F92EE;'>#BMP2#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=37, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3580, encryptionId=7591358092, topicName=BMP2)], attachment=null, authenticateStatus=null, createdAvatar=http://thirdqq.qlogo.cn/qqapp/1103841572/B389FA68ECBF51BE2FE14093CF61F6AE/100, createdBy=eb8e2500096, createdName=夏天与十三菇凉, createdTime=Tue May 21 11:37:00 CST 2019, time=2019-05-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1909260, encodeId=e8de1909260e3, content=<a href='/topic/show?id=8039e2512e8' target=_blank style='color:#2F92EE;'>#相互作用#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=30, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=72512, encryptionId=8039e2512e8, topicName=相互作用)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=f73a255, createdName=medscijoin, createdTime=Wed Aug 07 08:37:00 CST 2019, time=2019-08-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1634047, encodeId=0ab0163404e41, content=<a href='/topic/show?id=596635e549' target=_blank style='color:#2F92EE;'>#BMP#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=21, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3575, encryptionId=596635e549, topicName=BMP)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=d95322064897, createdName=HNYYM, createdTime=Tue Dec 04 20:37:00 CST 2018, time=2018-12-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1419273, encodeId=f3b114192e38d, content=<a href='/topic/show?id=2e2e10182602' target=_blank style='color:#2F92EE;'>#骨缺损#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=25, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=101826, encryptionId=2e2e10182602, topicName=骨缺损)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=51173492599, createdName=lfcmxl, createdTime=Sun Oct 07 11:37:00 CST 2018, time=2018-10-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1471607, encodeId=030e14e160754, content=<a href='/topic/show?id=c0132410554' target=_blank style='color:#2F92EE;'>#互作#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=28, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=24105, encryptionId=c0132410554, topicName=互作)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=4dc87121468, createdName=ylz8405, createdTime=Sun Oct 07 11:37:00 CST 2018, time=2018-10-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=348067, encodeId=f57634806e0e, content=学习了,长知识, beContent=null, objectType=article, channel=null, level=null, likeNumber=26, 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=Fri Oct 05 20:50:08 CST 2018, time=2018-10-05, status=1, ipAttribution=)]
    2018-10-05 1ddf0692m34(暂无匿称)

    学习了,长知识

    0