Cell:张锋学生带来CRISPR新工具,可靶向RNA进行编辑

2018-03-18 佚名 学术经纬

说到CRISPR技术,许多人都会想到CRISPR-Cas9基因编辑工具。诚然,这款能对DNA进行编辑的工具有着巨大的应用潜力,但不少科学家指出,倘若想用CRISPR技术来治疗人类的疾病,光靠DNA编辑是不够的。要知道,不少疾病的根源在于RNA,这是遗传信息转为蛋白质的关键,也是不少基因调控的核心。

说到CRISPR技术,许多人都会想到CRISPR-Cas9基因编辑工具。诚然,这款能对DNA进行编辑的工具有着巨大的应用潜力,但不少科学家指出,倘若想用CRISPR技术来治疗人类的疾病,光靠DNA编辑是不够的。要知道,不少疾病的根源在于RNA,这是遗传信息转为蛋白质的关键,也是不少基因调控的核心。

日前,来自Salk研究所的学术新星Patrick Hsu博士的课题组在顶尖期刊《细胞》上刊发研究,报道了在CRISPR技术领域的新突破。Patrick Hsu博士曾接受过著名华人学者张锋教授和庄小威教授的学术训练。作为CRISPR领域的专家之一,他也曾获福布斯“30 Under 30”奖项。


▲本研究的通讯作者Patrick Hsu博士(图片来源:Salk Institute)

在Salk研究所,Patrick Hsu博士专注于CRISPR工具箱的开发。“生物工程学家就像是大自然的侦探,能从DNA中寻找到蛛丝马迹,帮助解决遗传病的难题,” Patrick Hsu博士说道:“CRISPR已经为基因组的编辑带来了革命,我们想要将它的应用潜力拓展到RNA。”

我们知道,CRISPR是细菌的关键“免疫系统”,而与其相关的一系列防御蛋白在生物技术领域有着广泛的应用价值,其中就包括了我们熟知的Cas9蛋白。那么,自然界中是否存在类似于Cas9蛋白能高效编辑核酸,但主要靶向RNA的防御蛋白呢?


▲该研究的示意图(图片来源:《细胞》)

为了回答这一问题,该团队开发了一种计算机程序,能在细菌的DNA数据库中进行搜索,寻找潜在的CRISPR系统痕迹。随后,他们鉴定哪些CRISPR系统能够靶向RNA。

“我们假设说在演化中,细菌和病毒会不断进行军备竞赛,因此不同的CRISPR系统可能有着不同的专精,有些也许能靶向RNA。”该研究的第一作者Silvana Konermann博士说道。


▲从左到右:Peter Lotfy,Silvana Konermann博士,Patrick Hsu博士,Jennifer Oki,以及Nicholas Brideau博士(图片来源:Salk Institute)

而研究结果证实了他们的假设。该团队发现了一种叫做Cas13d的酶,它能让CRISPR系统靶向RNA。但和Cas9蛋白一样,来自不同菌株的Cas13d酶,其活性可以有很大的差异。因此,为了在人类细胞中得到应用,该酶还需要进一步的筛选和优化。最终,一款来自肠道菌株Ruminococcus flavefaciens的酶XPD3002脱颖而出。为了便于记忆,该酶被重新命名为CasRx,分别来自菌株名和蛋白名的首字母。

从尺寸上看,CasRx的体积极小,很适合被装入病毒载体中进行实际应用。而在编辑RNA的效果上,它不但有着较高的效率,脱靶效应也低于常用的RNA干扰技术。研究团队对CasRx的特性感到激动无比,认为它能成为一项重要的工具,用于探索生物体中特定RNA的功能,并有望带来靶向RNA的疗法。


▲CasRx(紫红色)能在人类细胞中编辑RNA(图片来源:Salk Institute)

在初步的实验里,CasRx的潜力得到了验证。我们知道在包括阿兹海默病的一系列失智症中,两类tau蛋白的比例会出现失衡,而这有望通过RNA编辑的方式得到逆转。研究人员们利用他们找到的这一全新系统,在由患者干细胞生成的神经元里靶向其中一类tau蛋白的RNA。实验结果表明,该系统能迅速地靶向RNA来调整tau蛋白的比例,使之接近于正常水平的80%。未来,此项技术有望在更多疾病领域得到应用。

“大自然充满了秘密,” Patrick Hsu博士评论道:“它是一片未经勘探的富矿,从中有望诞生出全新技术。”

Silvana Konermann, Peter Lotfy, Nicholas J. Brideau, et al. Transcriptome Engineering with RNA-Targeting Type VI-D CRISPR Effectors. Cell(2018)

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    2018-10-03 维他命
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beContent=null, objectType=article, channel=null, level=null, likeNumber=25, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=a8f22260741, createdName=121832a9m88暂无昵称, createdTime=Sun Mar 18 11:55:03 CST 2018, time=2018-03-18, status=1, ipAttribution=)]
  4. [GetPortalCommentsPageByObjectIdResponse(id=1870517, encodeId=5bc518e051710, content=<a href='/topic/show?id=fd764459a8' target=_blank style='color:#2F92EE;'>#Cell#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=30, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4459, encryptionId=fd764459a8, topicName=Cell)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=524d95, createdName=zhaozhouchifen, createdTime=Sun Sep 09 07:52:00 CST 2018, time=2018-09-09, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1960785, encodeId=f5551960e8540, content=<a href='/topic/show?id=dbe6445416' target=_blank style='color:#2F92EE;'>#CEL#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=36, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4454, encryptionId=dbe6445416, topicName=CEL)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c3ff68, createdName=维他命, createdTime=Wed Oct 03 03:52:00 CST 2018, time=2018-10-03, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1783828, encodeId=83771e8382829, content=<a href='/topic/show?id=751a524281' target=_blank style='color:#2F92EE;'>#CRISPR新工具#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=38, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=5242, encryptionId=751a524281, topicName=CRISPR新工具)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=e524260, createdName=dinorsor524, createdTime=Sun Oct 28 16:52:00 CST 2018, time=2018-10-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=298680, encodeId=952729868077, content=学习了.谢谢, beContent=null, objectType=article, channel=null, level=null, likeNumber=1, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/mONcle9pic3zSn0GqHrsfLGSUSR8zwnWWLT4FMl5XH8S58HuZslVkLsAPbXDXaliagK7TOxQfmngKibG1yrDonepCLDkcxGk8hS/0, createdBy=b8282062892, createdName=changjiu, createdTime=Thu Mar 22 19:44:25 CST 2018, time=2018-03-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=297783, encodeId=35c129e78383, content=学习了.谢谢, beContent=null, objectType=article, channel=null, level=null, likeNumber=70, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/mONcle9pic3zSn0GqHrsfLGSUSR8zwnWWLT4FMl5XH8S58HuZslVkLsAPbXDXaliagK7TOxQfmngKibG1yrDonepCLDkcxGk8hS/0, createdBy=b8282062892, createdName=changjiu, createdTime=Mon Mar 19 20:43:18 CST 2018, time=2018-03-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1276068, encodeId=a6e312e606856, content=<a href='/topic/show?id=755d5211a0' target=_blank style='color:#2F92EE;'>#CRISPR#</a>, 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channel=null, level=null, likeNumber=71, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20160725/IMG5795DAB13EA2B2572.jpg, createdBy=3c921669071, createdName=chenweiting, createdTime=Mon Mar 19 15:50:49 CST 2018, time=2018-03-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=297733, encodeId=a06129e73320, content=学习, beContent=null, objectType=article, channel=null, level=null, likeNumber=77, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTJpBl6xwMmnsKibwxcAIltOH3nnCEQbNE6TDbYtCKe8hYI0oJrbduNqnJraM1PyyjPKU1suAzicYPaA/132, createdBy=eeaf2031798, createdName=海之蓝, createdTime=Mon Mar 19 12:59:50 CST 2018, time=2018-03-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=297406, encodeId=db5d29e406b1, content=学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=25, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=a8f22260741, createdName=121832a9m88暂无昵称, createdTime=Sun Mar 18 11:55:03 CST 2018, time=2018-03-18, status=1, ipAttribution=)]
    2018-03-22 changjiu

    学习了.谢谢

    0

  5. 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channel=null, level=null, likeNumber=71, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20160725/IMG5795DAB13EA2B2572.jpg, createdBy=3c921669071, createdName=chenweiting, createdTime=Mon Mar 19 15:50:49 CST 2018, time=2018-03-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=297733, encodeId=a06129e73320, content=学习, beContent=null, objectType=article, channel=null, level=null, likeNumber=77, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTJpBl6xwMmnsKibwxcAIltOH3nnCEQbNE6TDbYtCKe8hYI0oJrbduNqnJraM1PyyjPKU1suAzicYPaA/132, createdBy=eeaf2031798, createdName=海之蓝, createdTime=Mon Mar 19 12:59:50 CST 2018, time=2018-03-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=297406, encodeId=db5d29e406b1, content=学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=25, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=a8f22260741, createdName=121832a9m88暂无昵称, createdTime=Sun Mar 18 11:55:03 CST 2018, time=2018-03-18, status=1, ipAttribution=)]
    2018-03-19 changjiu

    学习了.谢谢

    0

  6. 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channel=null, level=null, likeNumber=71, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20160725/IMG5795DAB13EA2B2572.jpg, createdBy=3c921669071, createdName=chenweiting, createdTime=Mon Mar 19 15:50:49 CST 2018, time=2018-03-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=297733, encodeId=a06129e73320, content=学习, beContent=null, objectType=article, channel=null, level=null, likeNumber=77, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTJpBl6xwMmnsKibwxcAIltOH3nnCEQbNE6TDbYtCKe8hYI0oJrbduNqnJraM1PyyjPKU1suAzicYPaA/132, createdBy=eeaf2031798, createdName=海之蓝, createdTime=Mon Mar 19 12:59:50 CST 2018, time=2018-03-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=297406, encodeId=db5d29e406b1, content=学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=25, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=a8f22260741, createdName=121832a9m88暂无昵称, createdTime=Sun Mar 18 11:55:03 CST 2018, time=2018-03-18, status=1, ipAttribution=)]
    2018-03-19 yuandd
  7. 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channel=null, level=null, likeNumber=71, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20160725/IMG5795DAB13EA2B2572.jpg, createdBy=3c921669071, createdName=chenweiting, createdTime=Mon Mar 19 15:50:49 CST 2018, time=2018-03-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=297733, encodeId=a06129e73320, content=学习, beContent=null, objectType=article, channel=null, level=null, likeNumber=77, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTJpBl6xwMmnsKibwxcAIltOH3nnCEQbNE6TDbYtCKe8hYI0oJrbduNqnJraM1PyyjPKU1suAzicYPaA/132, createdBy=eeaf2031798, createdName=海之蓝, createdTime=Mon Mar 19 12:59:50 CST 2018, time=2018-03-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=297406, encodeId=db5d29e406b1, content=学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=25, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=a8f22260741, createdName=121832a9m88暂无昵称, createdTime=Sun Mar 18 11:55:03 CST 2018, time=2018-03-18, status=1, ipAttribution=)]
    2018-03-19 chenweiting

    我觉得挺不错的知识

    0

  8. 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channel=null, level=null, likeNumber=71, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20160725/IMG5795DAB13EA2B2572.jpg, createdBy=3c921669071, createdName=chenweiting, createdTime=Mon Mar 19 15:50:49 CST 2018, time=2018-03-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=297733, encodeId=a06129e73320, content=学习, beContent=null, objectType=article, channel=null, level=null, likeNumber=77, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTJpBl6xwMmnsKibwxcAIltOH3nnCEQbNE6TDbYtCKe8hYI0oJrbduNqnJraM1PyyjPKU1suAzicYPaA/132, createdBy=eeaf2031798, createdName=海之蓝, createdTime=Mon Mar 19 12:59:50 CST 2018, time=2018-03-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=297406, encodeId=db5d29e406b1, content=学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=25, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=a8f22260741, createdName=121832a9m88暂无昵称, createdTime=Sun Mar 18 11:55:03 CST 2018, time=2018-03-18, status=1, ipAttribution=)]
    2018-03-19 chenweiting

    很新的知识

    0

  9. 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channel=null, level=null, likeNumber=71, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20160725/IMG5795DAB13EA2B2572.jpg, createdBy=3c921669071, createdName=chenweiting, createdTime=Mon Mar 19 15:50:49 CST 2018, time=2018-03-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=297733, encodeId=a06129e73320, content=学习, beContent=null, objectType=article, channel=null, level=null, likeNumber=77, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTJpBl6xwMmnsKibwxcAIltOH3nnCEQbNE6TDbYtCKe8hYI0oJrbduNqnJraM1PyyjPKU1suAzicYPaA/132, createdBy=eeaf2031798, createdName=海之蓝, createdTime=Mon Mar 19 12:59:50 CST 2018, time=2018-03-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=297406, encodeId=db5d29e406b1, content=学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=25, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=a8f22260741, createdName=121832a9m88暂无昵称, createdTime=Sun Mar 18 11:55:03 CST 2018, time=2018-03-18, status=1, ipAttribution=)]
    2018-03-19 海之蓝

    学习

    0

  10. 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channel=null, level=null, likeNumber=71, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20160725/IMG5795DAB13EA2B2572.jpg, createdBy=3c921669071, createdName=chenweiting, createdTime=Mon Mar 19 15:50:49 CST 2018, time=2018-03-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=297733, encodeId=a06129e73320, content=学习, beContent=null, objectType=article, channel=null, level=null, likeNumber=77, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTJpBl6xwMmnsKibwxcAIltOH3nnCEQbNE6TDbYtCKe8hYI0oJrbduNqnJraM1PyyjPKU1suAzicYPaA/132, createdBy=eeaf2031798, createdName=海之蓝, createdTime=Mon Mar 19 12:59:50 CST 2018, time=2018-03-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=297406, encodeId=db5d29e406b1, content=学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=25, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=a8f22260741, createdName=121832a9m88暂无昵称, createdTime=Sun Mar 18 11:55:03 CST 2018, time=2018-03-18, status=1, ipAttribution=)]
    2018-03-18 121832a9m88暂无昵称

    学习了

    0

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以CRISPR/Cas9为基础的基因编辑技术在艾滋病、血液病、肿瘤等多种遗传性疾病的基因治疗领域中展现出极大的应用前景。杜氏肌营养不良是一种X染色体隐性遗传疾病,医学界尚无有效疗法。近日,有研究人员指出,CRISPR/Cas9可用于杜氏肌营养不良症的基因治疗,打破该病无药可治无法可医的局面。

Science:哈佛团队带来CRISPR新应用:给细胞活动照张相

日前,来自哈佛大学的化学家刘如谦(David Liu)和博士后Weixin Tang利用革命性基因编辑工具CRISPR打造出了一个“细胞记录仪”。相关成果发表在顶级期刊Science杂志上。

BioRxiv:啥!?上帝的剪刀手CRISPR/Cas9或在人体无效,斯坦福大学科学家在七成人体内发现Cas9同源蛋白抗体

2017年可谓是基因治疗大放异彩的一年,在镰状细胞病、脊髓性肌萎缩症、血友病等绝症上,基因治疗屡斩奇功,不得不让人心生期待。而在基因治疗大家庭里,CRISPR更是让科学家寄予厚望。

CRISPR 的未来:改变世界的五种方式

1 月 31 日消息,据 Futurism报道 ,在过去几年里,CRISPR 始终占据着媒体头条。专家预测,这种基因编辑技术将改变地球,改变我们生活的社会甚至是周围的生物。与其他用于基因工程的工具相比,CRISPR(也被称为 CRISPR-Cas9) 更精确、廉价、易于使用,而且功能非常强大。

CRISPR基因编辑技术“遇见”人类现实之后…

不得不承认,自2013年科学家们首次成功使用CRISPR-Cas9技术编辑人体细胞以来,CRISPR基因编辑技术可谓是近年来基因领域乃至医学领域的“红人”。并且很多科学家预言这一技术将会为罕见病的治疗带来希望的曙光,更有专家预言其未来的前景将无限广阔,必将成为扞卫人类健康的重要“武器”。那现实中CRISPR基因编辑技术的应用真的如预言的一样,有这么“神奇的魔力”吗?近几年,CRISPR基因编辑技术