Adv Sci:基于石墨烯的miRNA转染可阻断前粘连蛋白融合增加骨形成和血管形成

2018-04-11 MedSci MedSci原创

本研究旨在设计一种石墨烯基miRNA转染药物递送系统用于抗吸收治疗。使用负载有miR-7b过表达质粒的聚乙烯亚胺(PEI)功能化的氧化石墨烯(GO)复合物开发了高效的非病毒基因递送系统。GO-PEI复合物在可接受的细胞毒性范围内表现出优异的转染效率。GO-PEI-miR-7b转染后miR-7b的过表达通过阻碍基本促融合分子树突细胞特异性跨膜蛋白的表达明显消除破骨细胞(OC)融合和骨吸收活性。然而,

本研究旨在设计一种石墨烯基miRNA转染药物递送系统用于抗吸收治疗。

使用负载有miR-7b过表达质粒的聚乙烯亚胺(PEI)功能化的氧化石墨烯(GO)复合物开发了高效的非病毒基因递送系统。GO-PEI复合物在可接受的细胞毒性范围内表现出优异的转染效率。GO-PEI-miR-7b转染后miR-7b的过表达通过阻碍基本促融合分子树突细胞特异性跨膜蛋白的表达明显消除破骨细胞(OC)融合和骨吸收活性。然而,破骨细胞生成在没有细胞 -细胞融合的情况下发生,并且前破伤风(POC)被保存。

通过保存POC,GO-PEI-miR-7b转染促进共培养系统中的间充质干细胞成骨和内皮祖细胞血管生成。POC分泌的血小板衍生的生长因子-BB在体外和体内都被GO-PEI-miR-7b上调。在治疗骨质疏松卵巢切除小鼠中,通过增加CD31hiEmcnhi细胞数量,GO-PEI-miR-7b可明显增强骨矿物质密度、骨体积以及骨血管化。

综上所述,该研究结果提供了细胞-细胞融合靶向miRNA转染药物递送策略,用于治疗具有过度破骨细胞骨吸收的骨疾病。

原始出处:

Dou C, Ding N, et al., Graphene-Based MicroRNA Transfection Blocks Preosteoclast Fusion to Increase Bone Formation and Vascularization. Adv Sci (Weinh). 2017 Dec 4;5(2):1700578. doi: 10.1002/advs.201700578. eCollection 2018 Feb. 

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    2018-04-28 smallant2002
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objectType=article, channel=null, level=null, likeNumber=66, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20201006/4db877c2887649beb09cb5effd0b38c7/916f66edd48a4e77b20ebc3e14b6e45c.jpg, createdBy=141e1980133, createdName=Y—xianghai, createdTime=Wed Apr 11 17:03:34 CST 2018, time=2018-04-11, status=1, ipAttribution=)]
    2018-04-13 Homburg
  5. 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level=null, likeNumber=70, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20201006/4db877c2887649beb09cb5effd0b38c7/916f66edd48a4e77b20ebc3e14b6e45c.jpg, createdBy=141e1980133, createdName=Y—xianghai, createdTime=Wed Apr 11 17:03:45 CST 2018, time=2018-04-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=304830, encodeId=e912304830a3, content=学习了新知识, beContent=null, objectType=article, channel=null, level=null, likeNumber=78, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20201006/4db877c2887649beb09cb5effd0b38c7/916f66edd48a4e77b20ebc3e14b6e45c.jpg, createdBy=141e1980133, createdName=Y—xianghai, createdTime=Wed Apr 11 17:03:39 CST 2018, time=2018-04-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=304829, encodeId=2176304829d5, content=学习了新知识, beContent=null, objectType=article, channel=null, level=null, likeNumber=66, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20201006/4db877c2887649beb09cb5effd0b38c7/916f66edd48a4e77b20ebc3e14b6e45c.jpg, createdBy=141e1980133, createdName=Y—xianghai, createdTime=Wed Apr 11 17:03:34 CST 2018, time=2018-04-11, status=1, ipAttribution=)]
    2018-04-13 licz0427
  6. 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level=null, likeNumber=70, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20201006/4db877c2887649beb09cb5effd0b38c7/916f66edd48a4e77b20ebc3e14b6e45c.jpg, createdBy=141e1980133, createdName=Y—xianghai, createdTime=Wed Apr 11 17:03:45 CST 2018, time=2018-04-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=304830, encodeId=e912304830a3, content=学习了新知识, beContent=null, objectType=article, channel=null, level=null, likeNumber=78, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20201006/4db877c2887649beb09cb5effd0b38c7/916f66edd48a4e77b20ebc3e14b6e45c.jpg, createdBy=141e1980133, createdName=Y—xianghai, createdTime=Wed Apr 11 17:03:39 CST 2018, time=2018-04-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=304829, encodeId=2176304829d5, content=学习了新知识, beContent=null, objectType=article, channel=null, level=null, likeNumber=66, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20201006/4db877c2887649beb09cb5effd0b38c7/916f66edd48a4e77b20ebc3e14b6e45c.jpg, createdBy=141e1980133, createdName=Y—xianghai, createdTime=Wed Apr 11 17:03:34 CST 2018, time=2018-04-11, status=1, ipAttribution=)]
    2018-04-11 1ddf0692m34(暂无匿称)

    学习了.长知识

    0

  7. 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    2018-04-11 Y—xianghai

    学习了新知识

    0

  8. 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    2018-04-11 Y—xianghai

    学习了新知识

    0

  9. 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    2018-04-11 Y—xianghai

    学习了新知识

    0

  10. 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    2018-04-11 Y—xianghai

    学习了新知识

    0

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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

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

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

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

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