J Biomed Mater Res A:胶原模拟蛋白Scl2-2和Scl2-3可用于促进充质干细胞的成骨

2018-05-18 MedSci MedSci原创

已知胶原蛋白I与整联蛋白α1和α2的相互作用促进人间充质干细胞(hMSC)成骨。尽管如此,阐明特定整联蛋白相互作用的相对影响十分困难,部分原因在于天然胶原蛋白的复杂性。在本研究中,我们使用了两种胶原模拟蛋白Scl2-2和Scl2-3来比较整合素α1与α2信号的成骨作用。 Scl2-2和Scl2-3都来源于Scl2-1,一种缺乏已知细胞粘附、细胞因子结合和基质金属蛋白酶位点的三螺旋蛋白。然而

已知胶原蛋白I与整联蛋白α1和α2的相互作用促进人间充质干细胞(hMSC)成骨。尽管如此,阐明特定整联蛋白相互作用的相对影响十分困难,部分原因在于天然胶原蛋白的复杂性。在本研究中,我们使用了两种胶原模拟蛋白Scl2-2和Scl2-3来比较整合素α1与α2信号的成骨作用。

Scl2-2和Scl2-3都来源于Scl2-1,一种缺乏已知细胞粘附、细胞因子结合和基质金属蛋白酶位点的三螺旋蛋白。然而,Scl2-2和Scl2-3分别被设计为不同的基于胶原的细胞粘附基序:GFPGER(结合整联蛋白α1和α2)或GFPGEN(仅结合整联蛋白α1)。hMSCs在含有Scl2-2或Scl2-3的聚(乙二醇)(PEG)水凝胶中培养2周。

结果显示,与PEG-Scl2-3凝胶相比,PEG-Scl2-2凝胶可增加hMSCs osterix的表达,骨桥蛋白产生和钙沉积相关。这些数据表明整联蛋白α2信号传导可能较整合素α1更能增加成骨作用。

由于p38可被整联蛋白α2激活,但不能被整联蛋白α1激活,因此将hMSCs在p38抑制剂存在下在PEG-Scl2-2水凝胶中进一步培养。结果表明,p38活性可能在胶原支持的hMSCs成骨中发挥关键作用。

综上所述,这些研究结果可用于合理设计支架,从而促进hMSCs的成骨。

原始出处:

Becerra-Bayona SM, Guiza-Arguello VR, et al., Influence of collagen-based integrin α1 and α2 mediated signaling on human mesenchymal stem cell osteogenesis in three dimensional contexts. J Biomed Mater Res A. 2018 May 15. doi: 10.1002/jbm.a.36451.

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    2019-02-03 sunylz
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    2018-10-18 showtest
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    2018-05-20 zhaojie88
  5. [GetPortalCommentsPageByObjectIdResponse(id=1793693, encodeId=b5751e936935d, content=<a href='/topic/show?id=0fa4160415e' target=_blank style='color:#2F92EE;'>#Scl2-3#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=34, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=16041, encryptionId=0fa4160415e, topicName=Scl2-3)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=87f580, createdName=yilong5287542, createdTime=Tue Oct 02 09:50:00 CST 2018, time=2018-10-02, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1918092, encodeId=9b401918092e5, content=<a href='/topic/show?id=4f26341994' target=_blank style='color:#2F92EE;'>#Bio#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3419, encryptionId=4f26341994, topicName=Bio)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=12de429, createdName=sunylz, createdTime=Sun Feb 03 22:50:00 CST 2019, time=2019-02-03, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1948872, encodeId=828219488e2c2, content=<a href='/topic/show?id=a4ee8862475' target=_blank style='color:#2F92EE;'>#蛋白S#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=37, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=88624, encryptionId=a4ee8862475, topicName=蛋白S)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=8f0715, createdName=showtest, createdTime=Thu Oct 18 21:50:00 CST 2018, time=2018-10-18, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1351717, encodeId=15451351e1781, content=<a href='/topic/show?id=e95954093cd' target=_blank style='color:#2F92EE;'>#成骨#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=32, 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=Sun May 20 03:50:00 CST 2018, time=2018-05-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1608828, encodeId=7476160882852, content=<a href='/topic/show?id=eb6b1145939' target=_blank style='color:#2F92EE;'>#Med#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=0, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=11459, encryptionId=eb6b1145939, topicName=Med)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=552a19396740, createdName=ms3994565386320060, createdTime=Sun May 20 03:50:00 CST 2018, time=2018-05-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=316329, encodeId=0fc431632986, content=学习了.长知识, beContent=null, objectType=article, channel=null, level=null, likeNumber=56, 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 May 18 13:24:28 CST 2018, time=2018-05-18, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=316326, encodeId=675f31632683, content=都是科学知识.了解一下也好., beContent=null, objectType=article, channel=null, level=null, likeNumber=57, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/jW482SpianMayicTRbRZ5RzcjoLTEEgkSSQ8pVIiaf4a4INaoMLBV16QEk3dvvBRpicwIwmDGv0jePErJ4aE9ibVBDPtkialQLT9Bs/0, createdBy=04811949400, createdName=邓启付, createdTime=Fri May 18 13:13:11 CST 2018, time=2018-05-18, status=1, ipAttribution=)]
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    2018-05-18 1ddf0692m34(暂无匿称)

    学习了.长知识

    0

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    2018-05-18 邓启付

    都是科学知识.了解一下也好.

    0

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