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Int J Nanomed:小分子修饰的仿生明胶/羟基磷灰石纳米纤维可有效增强成骨

2019-02-17 不详 网络

骨不连的大小骨缺损的修复是全世界面临的重大临床挑战。构建提供骨传导和骨诱导信号的成骨微环境是一种主要策略。在本研究中,研究人员通过静电纺丝开发了抗坏血酸(AA)和β-甘油磷酸二钠盐水合物(β-GP)修饰的仿生明胶/羟基磷灰石(GH)纳米纤维支架。然后通过N-羟基磺基-琥珀酰亚胺钠盐(NHS)和1-(3-二甲基氨基丙基)-3-乙基碳二亚胺盐酸盐(EDC)使支架交联。通过扫描电子显微镜(SEM)评估非

骨不连的大小骨缺损的修复是全世界面临的重大临床挑战。构建提供骨传导和骨诱导信号的成骨微环境是一种主要策略。

在本研究中,研究人员通过静电纺丝开发了抗坏血酸(AA)和β-甘油磷酸二钠盐水合物(β-GP)修饰的仿生明胶/羟基磷灰石(GH)纳米纤维支架。然后通过N-羟基磺基-琥珀酰亚胺钠盐(NHS)和1-(3-二甲基氨基丙基)-3-乙基碳二亚胺盐酸盐(EDC)使支架交联。通过扫描电子显微镜(SEM)评估非交联和交联支架的形态。傅里叶变换红外光谱(FT-IR)用于评估小分子和GH支架之间的相互作用模型。然后使用MTT,Alamar Blue和CCK8测定来研究各种交联支架的生物相容性。随后,通过定量逆转录聚合酶链反应(qRT-PCR)检测在支架上培养的骨髓基质细胞(BMSCs)的成骨基因表达。最后,将交联支架植入大鼠颅骨缺损模型中以评估体内成骨作用。

SEM结果显示,各种支架呈现细胞外基质(ECM)样纤维状多孔结构。FT-IR光谱表明AA和β-GP与GH支架共价键合。MTT,Alamar Blue和CCK8测定表明,所有支架均能很好地支持BMSCs的生长。qRT-PCR结果显示,GH/A/B支架上BMSCs中Alp和Runx2的表达水平分别比第7天的GH组高3.5和1.5倍。结果还显示AA - 和β-GP-修饰的GH支架可以以时间特异性方式显著诱导更高水平的成骨基因表达。重要的是,AA和β-GP在体外协同促进成骨细胞分化并显着诱导体内骨再生。令人印象深刻的是,AA和β-GP双重修饰的GH纳米纤维支架可作为指导骨再生的模板,并且骨缺损在6周时几乎完全修复(94.28%±5.00%)。此外,单个AA或β-GP修饰的GH纳米纤维支架在体内12周时分别可修复62.95%±9.39%和66.56%±18.45%的骨缺损。此外,AA和β-GP在体内表现出抗炎作用。

总之,我们的数据强调,AA,β-GP和GH纳米纤维为骨再生创造了良好的骨传导和骨诱导微环境。我们证明了AA和β-GP双重修饰的GH纳米纤维是一种多功能的骨组织工程支架。

原始出处:

Li D, Zhang K, et al., Small molecules modified biomimetic gelatin/hydroxyapatite nanofibers constructing an ideal osteogenic microenvironment with significantly enhanced cranial bone formation. Int J Nanomedicine. 2018 Nov 6;13:7167-7181. doi: 10.2147/IJN.S174553. eCollection 2018.

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    2019-12-12 宋威
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    2019-02-19 zhaojie88
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    2019-02-19 zhangyxzsh
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  6. [GetPortalCommentsPageByObjectIdResponse(id=1635701, encodeId=f1261635e0115, content=<a href='/topic/show?id=1059e743357' target=_blank style='color:#2F92EE;'>#纳米纤维#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=77, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=77433, encryptionId=1059e743357, topicName=纳米纤维)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=64fe22519052, createdName=1249883fm19暂无昵称, createdTime=Thu Sep 12 02:31:00 CST 2019, time=2019-09-12, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1914681, encodeId=e9e31914681b8, content=<a href='/topic/show?id=84d7469559b' target=_blank style='color:#2F92EE;'>#小分子#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=89, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=46955, encryptionId=84d7469559b, topicName=小分子)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=6105386, createdName=宋威, createdTime=Thu Dec 12 19:31:00 CST 2019, time=2019-12-12, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1352042, encodeId=c5e4135204221, content=<a href='/topic/show?id=e95954093cd' target=_blank style='color:#2F92EE;'>#成骨#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=73, 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=Tue Feb 19 07:31:00 CST 2019, time=2019-02-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1569352, encodeId=3b0215693521a, content=<a href='/topic/show?id=1c562e42646' target=_blank style='color:#2F92EE;'>#修饰#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=82, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=27426, encryptionId=1c562e42646, topicName=修饰)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=29c615505859, createdName=zhangyxzsh, createdTime=Tue Feb 19 07:31:00 CST 2019, time=2019-02-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1609600, encodeId=60db1609600c8, content=<a href='/topic/show?id=eb6b1145939' target=_blank style='color:#2F92EE;'>#Med#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=77, 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=Tue Feb 19 07:31:00 CST 2019, time=2019-02-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1622156, encodeId=1dde1622156df, content=<a href='/topic/show?id=f41b8000867' target=_blank style='color:#2F92EE;'>#羟基磷灰石#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=104, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=80008, encryptionId=f41b8000867, topicName=羟基磷灰石)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=395f25, createdName=爆笑小医, createdTime=Tue Feb 19 07:31:00 CST 2019, time=2019-02-19, status=1, ipAttribution=)]
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