Genome Res:新的多重Digenome-seq工具让CRISPR-Cas9飞得更高

2016-02-06 MedSci MedSci原创

自从2013年1月首次用于基因组编辑以来,CRISPR-Cas9的知名度与日俱增。让它如此引人注目的原因在于它惊人的高效性和实用性;简而言之,它比较容易使用。去年,来自韩国基础科学研究所基因组工程中心的Jin-Soo Kim研究团队在Cell Stem Cell期刊上发表一篇标题为“Functional Correction of Large Factor VIII Gene Chromoso

自从2013年1月首次用于基因组编辑以来,CRISPR-Cas9的知名度与日俱增。让它如此引人注目的原因在于它惊人的高效性和实用性;简而言之,它比较容易使用。去年,来自韩国基础科学研究所基因组工程中心的Jin-Soo Kim研究团队在Cell Stem Cell期刊上发表一篇标题为“Functional Correction of Large Factor VIII Gene Chromosomal Inversions in Hemophilia A Patient-Derived iPSCs Using CRISPR-Cas9”论文,描述了他们如何利用CRISPR-Cas9技术校正了一个倒位的基因序列,从而有效地治愈了一种血友病。该团队还利用这种技术在没有外源DNA提供模板的情形下对作物进行基因修饰。它是如此一种非常有用的工具以至于它的未来潜力非常巨大,也以至于它成为了2015年12月在美国华盛顿特区举办的人类基因编辑国际峰会的焦点。

CRISPR-Cas9是一种非常优秀的工具 ,但是这种技术也并不完美。在使用时,它有时会在未曾预料的脱靶位点上产生插入和缺失(insertions and deletions, indel)。鉴于预料之外的基因切割可能导致意想不到的突变,因此检测CRISPR-Cas9基因编辑过程中发生的任何错误是至关重要的。

如今,在一项新的研究中,Jin-Soo Kim团队提供一种被他们称作多重Digenome-seq (digested genome sequencing,即酶消化基因组测序)的工具,能够同时地绘制出几种CRISPR-Cas9核酸酶的全基因组特异性,并且能够很快地和低成本地发现想要的和不想要的indel。相关研究于2016年1月19日提前发表在Genome Research期刊上,论文标题为“Genome-wide target specificities of CRISPR-Cas9 nucleases revealed by multiplex Digenome-seq”。

论文第一作者Daesik Kim解释道,“Digenome-seq不同于其他的基于细胞的方法,这是因为它在体外而不是在细胞内检测不含细胞的基因组DNA上的切割位点。”利用不含细胞的DNA的优势在于它产生精确的分析结果,这是因为通常在细胞中发现的染色质不会干涉这一分析过程。再者,在研究前,待研究的DNA并不需要利用PCR进行大量扩增,因此Digenome-seq比之前的方法更加简单、快速和廉价。Digenome-seq靠将不含细胞的靶DNA与Cas9核酸酶和单向导RNA(sgRNA)在体外结合在一起而运作。sgRNA引导Cas9到DNA上的靶位点和脱靶位点上,在那里,Cas9 能够进行切割。

在这项研究中,研究人员利用多重Digenome-seq工具在体外鉴定出能被切割的靶位点和脱靶位点,从中找出上百个能够潜在导致意料之外突变的脱靶位点,并在细胞内测量了这些脱靶位点的indel发生频率。他们然后利用一种他们自己开发的被称作脱靶效应指数(off-target effect index, OTI)的体系对它们的准确性进行评分。OTI体系会比较每种sgRNA的脱靶频率(off-target frequency)与在靶频率(on-target frequency)的比值。

不同于Jin-Soo Kim团队去年发表在Nature Methods期刊上的单重Digenome-seq工具(论文标题为“Digenome-seq: genome-wide profiling of CRISPR-Cas9 off-target effects in human cells”),即一次只能分析一种sgRNA,多重Digenome-seq可同时分析多种sgRNA从而能够同时检测它们的靶位点和脱靶位点。这种多重分析过程比之前的方法更加迅速、高效和节约成本。除了快速外,多重Digenome-seq也能够比诸如HTGTS或Guide-seq之类的其他方法检测出更多的脱靶位点indel。

韩国基础科学研究所主任Jin-Soo Kim说,“CRISPR-Cas9是一种惊人的科学突破,将持续成为全世界生物学家们的研究焦点。”他补充道,“这种多重Digenome-seq工具也能够被用来选择脱靶效应最小的靶位点。在CRISPR-Cas9的治疗应用时,这是一个非常重要的方法。”

鉴于超优的准确性、成本节省和检测速度,多重Digenome-seq似乎是测试CRISPR-Cas9特异性的新标准方法。

原始出处:


Kim D, Bae S, Park J, Kim E, Kim S, Yu HR, Hwang J, Kim JI, Kim JS.Digenome-seq: genome-wide profiling of CRISPR-Cas9 off-target effects in human cells. Nat Methods. 2015 Mar;12(3):237-43

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    2016-02-11 zhambush

    支持

    0

  2. [GetPortalCommentsPageByObjectIdResponse(id=63859, encodeId=1d6263859df, content=支持, beContent=null, objectType=article, channel=null, level=null, likeNumber=96, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20151226/IMG567DEBD7852362830.jpg, createdBy=7f4c1575726, createdName=zhambush, createdTime=Thu Feb 11 02:57:00 CST 2016, time=2016-02-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=63744, encodeId=541163e44cb, content=是个方向, beContent=null, objectType=article, channel=null, level=null, likeNumber=118, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTJXCR8W80NNgQuicJU3aIm3JtiaNAFLYSMlBuVfGkSlw5Z5VpmZK4PyiaDURLAorhvwhWVnaM1gQdJXA/132, createdBy=a01444383, createdName=lixh1719, createdTime=Mon Feb 08 20:31:00 CST 2016, time=2016-02-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1275856, encodeId=491612e585645, content=<a href='/topic/show?id=755d5211a0' target=_blank style='color:#2F92EE;'>#CRISPR#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=36, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=5211, encryptionId=755d5211a0, topicName=CRISPR)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=583c133, createdName=yuandd, createdTime=Mon Feb 08 11:43:00 CST 2016, time=2016-02-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1360424, encodeId=5d35136042461, content=<a href='/topic/show?id=99e5521532' target=_blank style='color:#2F92EE;'>#CRISPR-Cas9#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=34, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=5215, encryptionId=99e5521532, topicName=CRISPR-Cas9)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=28b7142, createdName=liuquan, createdTime=Mon Feb 08 11:43:00 CST 2016, time=2016-02-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1364996, encodeId=de88136499650, content=<a href='/topic/show?id=3f66412ebd' target=_blank style='color:#2F92EE;'>#Cas9#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=33, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4127, encryptionId=3f66412ebd, topicName=Cas9)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=8346212, createdName=respect, createdTime=Mon Feb 08 11:43:00 CST 2016, time=2016-02-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1426335, encodeId=2d1c142633557, content=<a href='/topic/show?id=032b948ec5' target=_blank style='color:#2F92EE;'>#IgE#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=17, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=9487, encryptionId=032b948ec5, topicName=IgE)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=0cff4064659, createdName=zhenjiu124, createdTime=Mon Feb 08 11:43:00 CST 2016, time=2016-02-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1455259, encodeId=84ef1455259f0, content=<a href='/topic/show?id=ce8452137f' target=_blank style='color:#2F92EE;'>#CRISPR-Cas#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=27, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=5213, encryptionId=ce8452137f, topicName=CRISPR-Cas)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=e8505649833, createdName=guihongzh, createdTime=Mon Feb 08 11:43:00 CST 2016, time=2016-02-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1624758, encodeId=2ea81624e5891, content=<a href='/topic/show?id=0333412062' target=_blank style='color:#2F92EE;'>#Cas#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=34, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4120, encryptionId=0333412062, topicName=Cas)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=411420689333, createdName=yaanren, createdTime=Mon Feb 08 11:43:00 CST 2016, time=2016-02-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=63551, encodeId=11366355165, content=如果有什么就好了, beContent=null, objectType=article, channel=null, level=null, likeNumber=74, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTK29w9r0upRgxUXHNhe7bd3VxHnhBSpibMbKOjtX92zXr78SkuZfUNuADrjHiaw6uibZaEYjh9cJLzew/132, createdBy=261e1682638, createdName=1de3b290m83(暂无匿称), createdTime=Sun Feb 07 08:52:00 CST 2016, time=2016-02-07, status=1, ipAttribution=)]
    2016-02-08 lixh1719

    是个方向

    0

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    2016-02-08 yuandd
  4. [GetPortalCommentsPageByObjectIdResponse(id=63859, encodeId=1d6263859df, content=支持, beContent=null, objectType=article, channel=null, level=null, likeNumber=96, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20151226/IMG567DEBD7852362830.jpg, createdBy=7f4c1575726, createdName=zhambush, createdTime=Thu Feb 11 02:57:00 CST 2016, time=2016-02-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=63744, encodeId=541163e44cb, content=是个方向, beContent=null, objectType=article, channel=null, level=null, likeNumber=118, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTJXCR8W80NNgQuicJU3aIm3JtiaNAFLYSMlBuVfGkSlw5Z5VpmZK4PyiaDURLAorhvwhWVnaM1gQdJXA/132, createdBy=a01444383, createdName=lixh1719, createdTime=Mon Feb 08 20:31:00 CST 2016, time=2016-02-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1275856, encodeId=491612e585645, content=<a href='/topic/show?id=755d5211a0' target=_blank style='color:#2F92EE;'>#CRISPR#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=36, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=5211, encryptionId=755d5211a0, topicName=CRISPR)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=583c133, createdName=yuandd, createdTime=Mon Feb 08 11:43:00 CST 2016, time=2016-02-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1360424, encodeId=5d35136042461, content=<a href='/topic/show?id=99e5521532' target=_blank style='color:#2F92EE;'>#CRISPR-Cas9#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=34, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=5215, encryptionId=99e5521532, topicName=CRISPR-Cas9)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=28b7142, createdName=liuquan, createdTime=Mon Feb 08 11:43:00 CST 2016, time=2016-02-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1364996, encodeId=de88136499650, content=<a href='/topic/show?id=3f66412ebd' target=_blank style='color:#2F92EE;'>#Cas9#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=33, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4127, encryptionId=3f66412ebd, topicName=Cas9)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=8346212, createdName=respect, createdTime=Mon Feb 08 11:43:00 CST 2016, time=2016-02-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1426335, encodeId=2d1c142633557, content=<a href='/topic/show?id=032b948ec5' target=_blank style='color:#2F92EE;'>#IgE#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=17, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=9487, encryptionId=032b948ec5, topicName=IgE)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=0cff4064659, createdName=zhenjiu124, createdTime=Mon Feb 08 11:43:00 CST 2016, time=2016-02-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1455259, encodeId=84ef1455259f0, content=<a href='/topic/show?id=ce8452137f' target=_blank style='color:#2F92EE;'>#CRISPR-Cas#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=27, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=5213, encryptionId=ce8452137f, topicName=CRISPR-Cas)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=e8505649833, createdName=guihongzh, createdTime=Mon Feb 08 11:43:00 CST 2016, time=2016-02-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1624758, encodeId=2ea81624e5891, content=<a href='/topic/show?id=0333412062' target=_blank style='color:#2F92EE;'>#Cas#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=34, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4120, encryptionId=0333412062, topicName=Cas)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=411420689333, createdName=yaanren, createdTime=Mon Feb 08 11:43:00 CST 2016, time=2016-02-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=63551, encodeId=11366355165, content=如果有什么就好了, beContent=null, objectType=article, channel=null, level=null, likeNumber=74, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTK29w9r0upRgxUXHNhe7bd3VxHnhBSpibMbKOjtX92zXr78SkuZfUNuADrjHiaw6uibZaEYjh9cJLzew/132, createdBy=261e1682638, createdName=1de3b290m83(暂无匿称), createdTime=Sun Feb 07 08:52:00 CST 2016, time=2016-02-07, status=1, ipAttribution=)]
  5. [GetPortalCommentsPageByObjectIdResponse(id=63859, encodeId=1d6263859df, content=支持, beContent=null, objectType=article, channel=null, level=null, likeNumber=96, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20151226/IMG567DEBD7852362830.jpg, createdBy=7f4c1575726, createdName=zhambush, createdTime=Thu Feb 11 02:57:00 CST 2016, time=2016-02-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=63744, encodeId=541163e44cb, content=是个方向, beContent=null, objectType=article, channel=null, level=null, likeNumber=118, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTJXCR8W80NNgQuicJU3aIm3JtiaNAFLYSMlBuVfGkSlw5Z5VpmZK4PyiaDURLAorhvwhWVnaM1gQdJXA/132, createdBy=a01444383, createdName=lixh1719, createdTime=Mon Feb 08 20:31:00 CST 2016, time=2016-02-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1275856, encodeId=491612e585645, content=<a href='/topic/show?id=755d5211a0' target=_blank style='color:#2F92EE;'>#CRISPR#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=36, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=5211, encryptionId=755d5211a0, topicName=CRISPR)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=583c133, createdName=yuandd, createdTime=Mon Feb 08 11:43:00 CST 2016, time=2016-02-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1360424, encodeId=5d35136042461, content=<a href='/topic/show?id=99e5521532' target=_blank style='color:#2F92EE;'>#CRISPR-Cas9#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=34, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=5215, encryptionId=99e5521532, topicName=CRISPR-Cas9)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=28b7142, createdName=liuquan, createdTime=Mon Feb 08 11:43:00 CST 2016, time=2016-02-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1364996, encodeId=de88136499650, content=<a href='/topic/show?id=3f66412ebd' target=_blank style='color:#2F92EE;'>#Cas9#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=33, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4127, encryptionId=3f66412ebd, topicName=Cas9)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=8346212, createdName=respect, createdTime=Mon Feb 08 11:43:00 CST 2016, time=2016-02-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1426335, encodeId=2d1c142633557, content=<a href='/topic/show?id=032b948ec5' target=_blank style='color:#2F92EE;'>#IgE#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=17, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=9487, encryptionId=032b948ec5, topicName=IgE)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=0cff4064659, createdName=zhenjiu124, createdTime=Mon Feb 08 11:43:00 CST 2016, time=2016-02-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1455259, encodeId=84ef1455259f0, content=<a href='/topic/show?id=ce8452137f' target=_blank style='color:#2F92EE;'>#CRISPR-Cas#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=27, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=5213, encryptionId=ce8452137f, topicName=CRISPR-Cas)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=e8505649833, createdName=guihongzh, createdTime=Mon Feb 08 11:43:00 CST 2016, time=2016-02-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1624758, encodeId=2ea81624e5891, content=<a href='/topic/show?id=0333412062' target=_blank style='color:#2F92EE;'>#Cas#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=34, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4120, encryptionId=0333412062, topicName=Cas)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=411420689333, createdName=yaanren, createdTime=Mon Feb 08 11:43:00 CST 2016, time=2016-02-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=63551, encodeId=11366355165, content=如果有什么就好了, beContent=null, objectType=article, channel=null, level=null, likeNumber=74, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTK29w9r0upRgxUXHNhe7bd3VxHnhBSpibMbKOjtX92zXr78SkuZfUNuADrjHiaw6uibZaEYjh9cJLzew/132, createdBy=261e1682638, createdName=1de3b290m83(暂无匿称), createdTime=Sun Feb 07 08:52:00 CST 2016, time=2016-02-07, status=1, ipAttribution=)]
    2016-02-08 respect
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    2016-02-08 zhenjiu124
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    2016-02-08 yaanren
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    2016-02-07 1de3b290m83(暂无匿称)

    如果有什么就好了

    0

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1987年,科学家首次描述了CRISPR序列;2010和2011年,研究人员相继发现了该序列的自然生物学功能;2013年,张锋等科学家首次报道了CRISPR-Cas9系统在哺乳动物基因组编辑中的应用。张锋此前发表过大量Cell,Nature,Science文章,是基因编辑领域的超级新星,也是未来诺贝尔奖有力的争夺者。 在过去的3年里,基因编辑神器CRISPR被认为是遗传研究领域的革命性技术;

JMCB:中国科学家应用CRISPR破解基因组“未解之谜”

近日,来自上海交通大学的研究人员在国际学术期刊JMCB发表了一项最新研究进展,他们发现应用CRISPR/Cas9技术可以轻松实现对DNA片段的倒位和重复,对于基因组中存在的大量DNA调控元件和大量基因簇的功能研究具有一定意义。研究人员指出,人类基因组中包含了几百万个DNA调控元件和大量的基因簇,但其中大部分都没有进行过实验检测,还有大量基因组"未解之谜"等待人类去破解。DNA编辑技术CRISPR/

CRISPR/Cas9基因编辑技术快速向疾病治疗方向迈进

CRISPR这种于2012年的机制进行透彻阐述,如今脱靶的问题被迅速攻克,意味着,基因编辑技术离临床应用只有一步之遥。目前已全面应用于临床前的研究。2016年开年短短的半个月时间里,CRISPR在多种疾病治疗中大显身手。 杜氏肌营养不良症 三个独立研究小组提供了初步的研究证据表明,通过编辑一个与肌肉功能相关的基因,修复杜氏肌营养不良症小鼠的一些肌肉功能,可以治愈这一遗传性疾病。这标