J Biomed Mater Res A:石墨烯结构作为骨组织工程骨诱导因子的体外效应

2018-04-05 MedSci MedSci原创

众所周知,石墨烯及其衍生物可影响干细胞/祖细胞向成骨细胞谱系分化。然而,关于石墨烯参数对骨再生的影响,包括石墨烯浓度、尺寸、类型、亲水性、官能化和组成等方面,在文献中存在许多争议。本研究旨在给定参数及其对刺激细胞行为如增殖、存活力、附着和成骨分化的影响进行全面综述。在这项研究中,研究人员系统搜索了MEDLINE数据库中体外研究使用石墨烯及其衍生物进行骨组织工程的相关研究,时间设定为2000年1月至

众所周知,石墨烯及其衍生物可影响干细胞/祖细胞向成骨细胞谱系分化。然而,关于石墨烯参数对骨再生的影响,包括石墨烯浓度、尺寸、类型、亲水性、官能化和组成等方面,在文献中存在许多争议。本研究旨在给定参数及其对刺激细胞行为如增殖、存活力、附着和成骨分化的影响进行全面综述。

在这项研究中,研究人员系统搜索了MEDLINE数据库中体外研究使用石墨烯及其衍生物进行骨组织工程的相关研究,时间设定为2000年1月至2018年2月。

分析结果显示,不同的石墨烯衍生物,包括石墨烯、氧化石墨烯(GO)和还原氧化石墨烯(RGO),质量比≤1.5wt%,石墨烯和GO浓度为50μg/mL,RGO的浓度为60μg/mL,对于大多数细胞来说是安全的。但是,这些浓度高度依赖于细胞的类型。此外,研究还发现,横向尺寸小于5μm的石墨烯以及横向尺寸小于1μm的GO和RGO可降低细胞活力。

另外,石墨烯的三维结构可以促进细胞间的相互作用、迁移和增殖。当石墨烯及其衍生物与金属、聚合物和矿物质结合在一起时,它们经常表现出增强的机械性能和生物活性。最后,研究人员发现,石墨烯及其衍生物可增加表面粗糙度和孔隙率,由此明显增强细胞的粘附和分化。

原始出处:

Mohammadrezaei D, Golzar H, et al., In vitro effect of graphene structures as an osteoinductive factor in bone tissue engineering: A systematic review. J Biomed Mater Res A. 2018 Apr 3. doi: 10.1002/jbm.a.36422. 

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    2018-12-31 sunylz
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  5. 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time=2018-04-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=303039, encodeId=c10f30303936, content=学习了.长知识, beContent=null, objectType=article, channel=null, level=null, likeNumber=67, 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=Thu Apr 05 17:38:11 CST 2018, time=2018-04-05, status=1, ipAttribution=)]
    2018-05-22 1e16d8a5m40(暂无匿称)

    学习了

    0

  6. 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time=2018-04-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=303039, encodeId=c10f30303936, content=学习了.长知识, beContent=null, objectType=article, channel=null, level=null, likeNumber=67, 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=Thu Apr 05 17:38:11 CST 2018, time=2018-04-05, status=1, ipAttribution=)]
    2018-12-01 yangjxjc
  7. 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time=2018-04-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=303039, encodeId=c10f30303936, content=学习了.长知识, beContent=null, objectType=article, channel=null, level=null, likeNumber=67, 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=Thu Apr 05 17:38:11 CST 2018, time=2018-04-05, status=1, ipAttribution=)]
    2018-04-09 wxl882001

    了解一下

    0

  8. 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  9. 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  10. 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time=2018-04-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=303039, encodeId=c10f30303936, content=学习了.长知识, beContent=null, objectType=article, channel=null, level=null, likeNumber=67, 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=Thu Apr 05 17:38:11 CST 2018, time=2018-04-05, status=1, ipAttribution=)]
    2018-04-05 1ddf0692m34(暂无匿称)

    学习了.长知识

    0

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了解石墨烯和人类免疫细胞之间的生物分子相互作用是将其作为诊断或治疗工具的先决条件。为了表征石墨烯和免疫细胞之间的复杂相互作用,本研究提出了一个包含分子和细胞参数评估的综合分析流程。研究人员使用单细胞质谱仪来分析15个免疫细胞群体上氧化石墨烯(GO)和氨基(GONH2)功能化的作用,在单细胞水平上查询30个标记物。接下来,单细胞质粒细胞计数与全基因组转录组分析的结合表明,胺基减少了GO对细胞代谢的干

Int J Nanomed:氧化石墨烯可激活自噬潮,用于神经退行性疾病的治疗

氧化石墨烯(GO)是一种具有新的生物应用的纳米材料。已知自噬是与神经变性疾病进展有关的细胞内降解系统。尽管既往研究显示GO可诱导自噬潮,但是其在神经退行性疾病中潜在的信号传导通路以及如何参与神经保护仍尚未可知。本研究表明,GO本身可激活神经元细胞中的自噬潮,并赋予对朊蛋白(PrP)(106-126)介导的神经毒性的神经保护作用。在SK-N-SH神经元细胞中可以检测到GO,它触发自噬信号传导。GO诱

J Colloid Interface Sci:混合水凝胶不仅可载药还可抗菌

水凝胶是一种很有应用前景的3D材料,越来越多的研究发现其可作为药物和细胞载体及递送进行应用。本研究中,我们报告了一个可注射的胶体水凝胶,直接由氧化石墨烯(GO)和热敏纳米凝胶(tNG)制备。羧基和氧乙基之间的pH依赖性氢键相互作用可使得GO和纳米凝胶之间形成可逆组装。水凝胶是可塑的,可以成型为不同的形状,随着pH和温度的变化其机械强度可调。实验研究结果显示,该混合水凝胶具有较高的抗菌活性,且作为支

Nanoscale:石墨烯负载姜黄素可有效对抗RSV感染

病毒引起的疾病仍然是一个全球性的负担。呼吸道合胞病毒(RSV)是婴幼儿下呼吸道疾病的主要病毒性病原体,与严重的肺部疾病的发生有关。在此基础上,我们开发了一种具有高效抗病毒活性的β-环糊精(CD)功能化氧化石墨烯(GO)复合材料,能有效地负载姜黄素。RSV是一种负性单链RNA病毒,以此为模型病毒研究多功能GO的抗病毒活性。经组织培养感染剂量试验和免疫荧光试验证实,负载姜黄素的功能化GO对RSV感染具

Small:甘草次酸功能化氧化石墨烯可靶向线粒体用于癌症的治疗

由于线粒体内存在细胞自杀因子,因此线粒体介导的细胞凋亡(MMA)癌症治疗的优先选择,但线粒体低通透性则成了靶向药物递送的瓶颈。本研究中,研究人员发现光果甘草天然产物甘草次酸(GA)是一种新型的线粒体靶向配体,可以提高线粒体的通透性,增加线粒体对药物的摄取。首先制备GA功能化的氧化石墨烯(GO),然后将其用作靶向递送阿霉素进入线粒体的载体。体外和体内机制研究表明,GA功能化的GO可降低线粒体膜电位并