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Biomaterials:改良水凝胶可用于微创修复软骨缺损

2019-07-28 sunshine 译 MedSci原创

胶原蛋白已被广泛用于软骨修复,但其低刚度和快速降解不利于软骨形成。在这里,我们通过天然产物交联剂(京尼平)将生物相容性碳点纳米颗粒(CD NP)缀合到胶原上以制备可注射水凝胶(称为胶原蛋白-京尼平-CD纳米颗粒,CGN)。由于京尼平的交联作用和CD NP的存在,CGN水凝胶显示出硬度的增加,并且可通过光动力疗法(PDT)产生适量的活性氧物质(ROS)。刚度增强和ROS产生均导致骨髓来源干细胞(BM

胶原蛋白已被广泛用于软骨修复,但其低刚度和快速降解不利于软骨形成。在这里,我们通过天然产物交联剂(京尼平)将生物相容性碳点纳米颗粒(CD NP)缀合到胶原上以制备可注射水凝胶(称为胶原蛋白-京尼平-CD纳米颗粒,CGN)。由于京尼平的交联作用和CD NP的存在,CGN水凝胶显示出硬度的增加,并且可通过光动力疗法(PDT)产生适量的活性氧物质(ROS)。刚度增强和ROS产生均导致骨髓来源干细胞(BMSC)的软骨形成分化改善以及随后软骨缺损修复的软骨再生增强。

具体而言,CGN水凝胶的压缩模量比纯胶原水凝胶高21倍,降解率低39.3%。PDT和CGN水凝胶的组合使BMSCs增殖增加50.3%,将软骨特异性基因的表达上调多倍,并在第21天使GAG分泌增加205.1%。这种组合还可在短短8周内加速软骨再生。 通过分别调节TGF-β/ SMAD和mTOR信号传导途径,刚度增强和ROS产生协同促进软骨形成分化。

综上所述,该研究结果表明,CD修饰的水凝胶注射和PDT治疗的组合代表了用于微创修复软骨缺陷的新策略。

原始出处:

Lu Z, Liu S, et al., An injectable collagen-genipin-carbon dot hydrogel combined with photodynamic therapy to enhance chondrogenesis. Biomaterials. 2019 Jul 12;218:119190. doi: 10.1016/j.biomaterials.2019.05.001. 

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    2020-03-16 sunylz
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    2019-07-30 tastas
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    2019-07-30 vera_1203
  5. [GetPortalCommentsPageByObjectIdResponse(id=1918779, encodeId=791b1918e798f, content=<a href='/topic/show?id=4f26341994' target=_blank style='color:#2F92EE;'>#Bio#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=45, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3419, encryptionId=4f26341994, topicName=Bio)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=12de429, createdName=sunylz, createdTime=Mon Mar 16 14:04:00 CST 2020, time=2020-03-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2050054, encodeId=b20b205005418, content=<a href='/topic/show?id=cbdd3451e3' target=_blank style='color:#2F92EE;'>#Biomaterials#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=37, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3451, encryptionId=cbdd3451e3, topicName=Biomaterials)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=d8e0333, createdName=zhangyxzsh, createdTime=Sat Sep 21 08:04:00 CST 2019, time=2019-09-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1308061, encodeId=ccd013080613d, content=<a href='/topic/show?id=edd364149bc' target=_blank style='color:#2F92EE;'>#水凝胶#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=50, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=64149, encryptionId=edd364149bc, topicName=水凝胶)], attachment=null, authenticateStatus=null, createdAvatar=/v1.0.0/img/user_icon.png, createdBy=47c5349, createdName=tastas, createdTime=Tue Jul 30 09:04:00 CST 2019, time=2019-07-30, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1317065, encodeId=e175131e065f0, content=<a href='/topic/show?id=df8950505a2' target=_blank style='color:#2F92EE;'>#微创#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=35, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=50505, encryptionId=df8950505a2, topicName=微创)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=644e456, createdName=vera_1203, createdTime=Tue Jul 30 09:04:00 CST 2019, time=2019-07-30, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1419325, encodeId=d0b514193253b, 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=35, 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=Tue Jul 30 09:04:00 CST 2019, time=2019-07-30, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1461036, encodeId=937c146103654, content=<a href='/topic/show?id=de4331310a4' target=_blank style='color:#2F92EE;'>#凝胶#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=32, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=31310, encryptionId=de4331310a4, topicName=凝胶)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=e09e6383467, createdName=lishizhe, createdTime=Tue Jul 30 09:04:00 CST 2019, time=2019-07-30, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=370466, encodeId=3f213e0466e8, content=学习了,学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=78, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/jW482SpianMayicTRbRZ5RzTetibytbqFDmFITWHyBWbxU7S9MYibgPSqvu0sYteH0N6zXqbU0Kf3Mbdb7yWM1Kud3zPgYBibE2SZ/0, createdBy=da7696924, createdName=qingfengqishi5, createdTime=Mon Jul 29 22:05:11 CST 2019, time=2019-07-29, status=1, ipAttribution=)]
    2019-07-30 lfcmxl
  6. [GetPortalCommentsPageByObjectIdResponse(id=1918779, encodeId=791b1918e798f, content=<a href='/topic/show?id=4f26341994' target=_blank style='color:#2F92EE;'>#Bio#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=45, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3419, encryptionId=4f26341994, topicName=Bio)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=12de429, createdName=sunylz, createdTime=Mon Mar 16 14:04:00 CST 2020, time=2020-03-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2050054, encodeId=b20b205005418, content=<a href='/topic/show?id=cbdd3451e3' target=_blank style='color:#2F92EE;'>#Biomaterials#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=37, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3451, encryptionId=cbdd3451e3, topicName=Biomaterials)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=d8e0333, createdName=zhangyxzsh, createdTime=Sat Sep 21 08:04:00 CST 2019, time=2019-09-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1308061, encodeId=ccd013080613d, content=<a href='/topic/show?id=edd364149bc' target=_blank style='color:#2F92EE;'>#水凝胶#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=50, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=64149, encryptionId=edd364149bc, topicName=水凝胶)], attachment=null, authenticateStatus=null, createdAvatar=/v1.0.0/img/user_icon.png, createdBy=47c5349, createdName=tastas, createdTime=Tue Jul 30 09:04:00 CST 2019, time=2019-07-30, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1317065, encodeId=e175131e065f0, content=<a href='/topic/show?id=df8950505a2' target=_blank style='color:#2F92EE;'>#微创#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=35, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=50505, encryptionId=df8950505a2, topicName=微创)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=644e456, createdName=vera_1203, createdTime=Tue Jul 30 09:04:00 CST 2019, time=2019-07-30, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1419325, encodeId=d0b514193253b, 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=35, 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=Tue Jul 30 09:04:00 CST 2019, time=2019-07-30, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1461036, encodeId=937c146103654, content=<a href='/topic/show?id=de4331310a4' target=_blank style='color:#2F92EE;'>#凝胶#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=32, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=31310, encryptionId=de4331310a4, topicName=凝胶)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=e09e6383467, createdName=lishizhe, createdTime=Tue Jul 30 09:04:00 CST 2019, time=2019-07-30, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=370466, encodeId=3f213e0466e8, content=学习了,学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=78, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/jW482SpianMayicTRbRZ5RzTetibytbqFDmFITWHyBWbxU7S9MYibgPSqvu0sYteH0N6zXqbU0Kf3Mbdb7yWM1Kud3zPgYBibE2SZ/0, createdBy=da7696924, createdName=qingfengqishi5, createdTime=Mon Jul 29 22:05:11 CST 2019, time=2019-07-29, status=1, ipAttribution=)]
    2019-07-30 lishizhe
  7. [GetPortalCommentsPageByObjectIdResponse(id=1918779, encodeId=791b1918e798f, content=<a href='/topic/show?id=4f26341994' target=_blank style='color:#2F92EE;'>#Bio#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=45, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3419, encryptionId=4f26341994, topicName=Bio)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=12de429, createdName=sunylz, createdTime=Mon Mar 16 14:04:00 CST 2020, time=2020-03-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2050054, encodeId=b20b205005418, content=<a href='/topic/show?id=cbdd3451e3' target=_blank style='color:#2F92EE;'>#Biomaterials#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=37, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3451, encryptionId=cbdd3451e3, topicName=Biomaterials)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=d8e0333, createdName=zhangyxzsh, createdTime=Sat Sep 21 08:04:00 CST 2019, time=2019-09-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1308061, encodeId=ccd013080613d, content=<a href='/topic/show?id=edd364149bc' target=_blank style='color:#2F92EE;'>#水凝胶#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=50, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=64149, encryptionId=edd364149bc, topicName=水凝胶)], attachment=null, authenticateStatus=null, createdAvatar=/v1.0.0/img/user_icon.png, createdBy=47c5349, createdName=tastas, createdTime=Tue Jul 30 09:04:00 CST 2019, time=2019-07-30, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1317065, encodeId=e175131e065f0, content=<a href='/topic/show?id=df8950505a2' target=_blank style='color:#2F92EE;'>#微创#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=35, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=50505, encryptionId=df8950505a2, topicName=微创)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=644e456, createdName=vera_1203, createdTime=Tue Jul 30 09:04:00 CST 2019, time=2019-07-30, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1419325, encodeId=d0b514193253b, 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=35, 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=Tue Jul 30 09:04:00 CST 2019, time=2019-07-30, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1461036, encodeId=937c146103654, content=<a href='/topic/show?id=de4331310a4' target=_blank style='color:#2F92EE;'>#凝胶#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=32, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=31310, encryptionId=de4331310a4, topicName=凝胶)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=e09e6383467, createdName=lishizhe, createdTime=Tue Jul 30 09:04:00 CST 2019, time=2019-07-30, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=370466, encodeId=3f213e0466e8, content=学习了,学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=78, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/jW482SpianMayicTRbRZ5RzTetibytbqFDmFITWHyBWbxU7S9MYibgPSqvu0sYteH0N6zXqbU0Kf3Mbdb7yWM1Kud3zPgYBibE2SZ/0, createdBy=da7696924, createdName=qingfengqishi5, createdTime=Mon Jul 29 22:05:11 CST 2019, time=2019-07-29, status=1, ipAttribution=)]
    2019-07-29 qingfengqishi5

    学习了,学习了

    0

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