Nat Biotech:一次生产10亿CAR-T细胞,新型CRISPR技术,无需病毒载体高效插入超长DNA序列

2022-09-11 nagashi “生物世界”公众号

常规CRISPR技术通常依靠病毒载体来递送到细胞中,但病毒载体往往成本高昂且耗费资源,因此,制造大量临床级病毒载体一直是CRISPR技术临床应用的主要瓶颈之一。

CRISPR技术的出现显着改变了基因编辑领域的格局,为科学家自由操纵基因提供了前所未有的简便和高效。然而,目前CRISPR技术并非完美无缺,仍存在一定局限性,并面临许多挑战。

常规CRISPR技术通常依靠病毒载体来递送到细胞中,但病毒载体往往成本高昂且耗费资源,因此,制造大量临床级病毒载体一直是CRISPR技术临床应用的主要瓶颈之一。此外,传统病毒载体(慢病毒载体)在基因组中插入基因的位点具有随机性,难以对其进行精准控制,因此具有潜在致癌性风险。

近日,美国加州大学旧金山分校的研究人员在 Nature Biotechnology 期刊发表题为:High-yield genome engineering in primary cells using a hybrid ssDNA repair template and small-molecule cocktails 的研究论文。

该研究开发了一种改进型CRISPR-Cas9基因编辑技术,无需病毒载体即可非常高效地将长DNA序列精准引入细胞基因组的精确位置,实现比常规CRISPR技术高2-3倍的编辑效率。而且,能够一次性产生高达10亿个CAR-T细胞,这为下一代安全高效的基于CRISPR的细胞疗法打开了新的大门。

在经典的CRISPR-Cas9基因编辑技术中,需要使用高浓度的双链DNA(dsDNA)和Cas9靶序列来增强CRISPR介导的插入效率,但这可能对原代细胞产生较强的毒性。与之相对,单链DNA(ssDNA)对细胞的毒性较小,即使在相对较高的浓度下也是如此。

此外,为了克服常规CRISPR技术需要病毒载体的弊端,多年以来,研究团队一直致力于将更长的DNA序列以一种不依赖病毒载体的方式插入到基因组中的特定位点,并实现更高效的基因编辑。

在这最新研究中,研究团队开发了一种新型CRISPR系统,利用结合Cas9靶序列的单链DNA(ssDNA)HDR模板(HDRT),实现了相对于dsDNA的2-3倍的敲入效率和产量。此外,这种方法不依赖于病毒载体,允许科学家将特别长的DNA序列引入细胞基因组的精确位置。

新型CRISPR系统的开发

不仅如此,研究团队还展示了如何利用新型CRISPR系统来快速生产CAR-T细胞。CAR-T细胞是近年来十分火热的免疫疗法,该技术从患者身上取下T细胞并对其进行改造,在对抗多发性骨髓瘤等血液肿瘤血癌展现出良好的前景。

研究团队使用新的DNA模板生成了超过10亿个靶向多发性骨髓瘤的CAR-T细胞,其中大约一半的T细胞获得了新基因并转化为CAR-T细胞。研究人员将DNA模板定位到基因组中的一个特定位置,称为TRAC位点,这有助于提高CAR-T细胞的抗肿瘤能力。

利用新型CRISPR系统来快速生产CAR-T细胞

该研究的第一作者Brian Shy博士表示,他们开发的新型CRISPR系统可以在一次运行中设计超过10亿个CAR-T细胞,这远超治疗单个病人所需的细胞数量。并且,由于不需要昂贵的病毒载体,这种新型CRISPR系统不受成本、制造复杂性和供应链挑战的限制,使得新的细胞和基因疗法更快、更好、更便宜。

新型CRISPR系统可以在一次运行中设计超过10亿个CAR-T细胞

此外,研究人员首次表明,他们的方法可以完全替代与罕见遗传免疫疾病相关的两个基因,即IL2RA和CTLA4。过去已有研究证明可以替换IL2RA基因的突变片段,如今,这项最新研究表明,可以一次性替换整个IL2RA和CTLA4基因,这是一种“一刀切”的方法,可以同时治疗在同一个基因上有不同突变位点的患者,而不必为每个患者的突变生成个性化的模板。

治疗和诊断的靶基因的全ORF替换人类T细胞编辑

更重要的是,研究结果显示,用这种基因工程方法处理的细胞中,近90%获得了健康的基因版本。目前,研究团队正推进在CAR-T细胞治疗和IL2RA基因缺陷治疗中使用这种新型非病毒CRISPR技术的临床试验。

总的来说,这项发表在 Nature Biotechnology 上的研究开发了一种新型的、不依赖病毒载体的CRISPR-Cas9基因编辑系统,实现比常规CRISPR技术高2-3倍的编辑效率。这种新的非病毒方法能够更有效地实现靶向性,并加速下一代CAR-T细胞疗法的发展。

原始出处:

Shy, B.R., Vykunta, V.S., Ha, A. et al. High-yield genome engineering in primary cells using a hybrid ssDNA repair template and small-molecule cocktails. Nat Biotechnol (2022). https://doi.org/10.1038/s41587-022-01418-8.

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    2022-12-25 cathymary
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    2023-05-20 mei539
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encodeId=116e12e6208cd, content=<a href='/topic/show?id=755d5211a0' target=_blank style='color:#2F92EE;'>#CRISPR#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=59, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=5211, encryptionId=755d5211a0, topicName=CRISPR)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=583c133, createdName=yuandd, createdTime=Tue Sep 13 07:54:21 CST 2022, time=2022-09-13, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1517862, encodeId=81ac151e8620b, content=<a href='/topic/show?id=44156886664' target=_blank style='color:#2F92EE;'>#生产#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=33, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=68866, encryptionId=44156886664, topicName=生产)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=37a111112788, createdName=ms1343860338762272, createdTime=Tue Sep 13 07:54:21 CST 2022, time=2022-09-13, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1618712, encodeId=1de31618e1229, content=<a href='/topic/show?id=e798524076' target=_blank style='color:#2F92EE;'>#Crispr技术#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=34, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=5240, encryptionId=e798524076, topicName=Crispr技术)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=a49419938232, createdName=ms1779634646866130, createdTime=Tue Sep 13 07:54:21 CST 2022, time=2022-09-13, status=1, ipAttribution=)]
    2023-03-31 shock_melon
  4. 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07:54:21 CST 2022, time=2022-09-13, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1618712, encodeId=1de31618e1229, content=<a href='/topic/show?id=e798524076' target=_blank style='color:#2F92EE;'>#Crispr技术#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=34, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=5240, encryptionId=e798524076, topicName=Crispr技术)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=a49419938232, createdName=ms1779634646866130, createdTime=Tue Sep 13 07:54:21 CST 2022, time=2022-09-13, status=1, ipAttribution=)]
    2022-12-06 仁者大医
  5. 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07:54:21 CST 2022, time=2022-09-13, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1618712, encodeId=1de31618e1229, content=<a href='/topic/show?id=e798524076' target=_blank style='color:#2F92EE;'>#Crispr技术#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=34, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=5240, encryptionId=e798524076, topicName=Crispr技术)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=a49419938232, createdName=ms1779634646866130, createdTime=Tue Sep 13 07:54:21 CST 2022, time=2022-09-13, status=1, ipAttribution=)]
    2022-10-10 sunylz
  6. 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07:54:21 CST 2022, time=2022-09-13, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1618712, encodeId=1de31618e1229, content=<a href='/topic/show?id=e798524076' target=_blank style='color:#2F92EE;'>#Crispr技术#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=34, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=5240, encryptionId=e798524076, topicName=Crispr技术)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=a49419938232, createdName=ms1779634646866130, createdTime=Tue Sep 13 07:54:21 CST 2022, time=2022-09-13, status=1, ipAttribution=)]
  7. 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createdBy=58cb23213384, createdName=mei539, createdTime=Sat May 20 04:54:21 CST 2023, time=2023-05-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1652540, encodeId=49e01652540b1, content=<a href='/topic/show?id=13d01e24509' target=_blank style='color:#2F92EE;'>#TEC#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=45, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=17245, encryptionId=13d01e24509, topicName=TEC)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=852f24292001, createdName=shock_melon, createdTime=Fri Mar 31 08:54:21 CST 2023, time=2023-03-31, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1781524, encodeId=30681e8152441, content=<a href='/topic/show?id=8ce8405907' target=_blank style='color:#2F92EE;'>#CAR-#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=58, replyNumber=0, topicName=null, topicId=null, 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objectType=article, channel=null, level=null, likeNumber=36, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=70990, encryptionId=f9cfe09905f, topicName=病毒载体)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=ebd533571600, createdName=ewsr12, createdTime=Sat Jan 21 10:54:21 CST 2023, time=2023-01-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1886023, encodeId=1e331886023c0, content=<a href='/topic/show?id=3b2112532d8' target=_blank style='color:#2F92EE;'>#Nat#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=55, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=12532, encryptionId=3b2112532d8, topicName=Nat)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2e6f107, createdName=liye789132251, createdTime=Fri Mar 03 06:54:21 CST 2023, time=2023-03-03, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1276208, encodeId=116e12e6208cd, content=<a href='/topic/show?id=755d5211a0' target=_blank style='color:#2F92EE;'>#CRISPR#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=59, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=5211, encryptionId=755d5211a0, topicName=CRISPR)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=583c133, createdName=yuandd, createdTime=Tue Sep 13 07:54:21 CST 2022, time=2022-09-13, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1517862, encodeId=81ac151e8620b, content=<a href='/topic/show?id=44156886664' target=_blank style='color:#2F92EE;'>#生产#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=33, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=68866, encryptionId=44156886664, topicName=生产)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=37a111112788, createdName=ms1343860338762272, createdTime=Tue Sep 13 07:54:21 CST 2022, time=2022-09-13, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1618712, encodeId=1de31618e1229, content=<a href='/topic/show?id=e798524076' target=_blank style='color:#2F92EE;'>#Crispr技术#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=34, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=5240, encryptionId=e798524076, topicName=Crispr技术)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=a49419938232, createdName=ms1779634646866130, createdTime=Tue Sep 13 07:54:21 CST 2022, time=2022-09-13, status=1, ipAttribution=)]
    2023-03-03 liye789132251
  8. [GetPortalCommentsPageByObjectIdResponse(id=1927763, encodeId=f501192e76375, content=<a href='/topic/show?id=a59234e3b4' target=_blank style='color:#2F92EE;'>#Biotech#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=37, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3473, encryptionId=a59234e3b4, topicName=Biotech)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=226a143, createdName=cathymary, createdTime=Sun Dec 25 13:54:21 CST 2022, time=2022-12-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1645512, encodeId=375316455123e, content=<a href='/topic/show?id=db329364360' target=_blank style='color:#2F92EE;'>#载体#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=51, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=93643, encryptionId=db329364360, topicName=载体)], attachment=null, authenticateStatus=null, createdAvatar=null, 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07:54:21 CST 2022, time=2022-09-13, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1618712, encodeId=1de31618e1229, content=<a href='/topic/show?id=e798524076' target=_blank style='color:#2F92EE;'>#Crispr技术#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=34, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=5240, encryptionId=e798524076, topicName=Crispr技术)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=a49419938232, createdName=ms1779634646866130, createdTime=Tue Sep 13 07:54:21 CST 2022, time=2022-09-13, status=1, ipAttribution=)]
    2022-09-13 yuandd
  9. [GetPortalCommentsPageByObjectIdResponse(id=1927763, encodeId=f501192e76375, content=<a href='/topic/show?id=a59234e3b4' target=_blank style='color:#2F92EE;'>#Biotech#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=37, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3473, encryptionId=a59234e3b4, topicName=Biotech)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=226a143, createdName=cathymary, createdTime=Sun Dec 25 13:54:21 CST 2022, time=2022-12-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1645512, encodeId=375316455123e, content=<a href='/topic/show?id=db329364360' target=_blank style='color:#2F92EE;'>#载体#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=51, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=93643, encryptionId=db329364360, topicName=载体)], attachment=null, authenticateStatus=null, createdAvatar=null, 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07:54:21 CST 2022, time=2022-09-13, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1618712, encodeId=1de31618e1229, content=<a href='/topic/show?id=e798524076' target=_blank style='color:#2F92EE;'>#Crispr技术#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=34, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=5240, encryptionId=e798524076, topicName=Crispr技术)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=a49419938232, createdName=ms1779634646866130, createdTime=Tue Sep 13 07:54:21 CST 2022, time=2022-09-13, status=1, ipAttribution=)]
  10. [GetPortalCommentsPageByObjectIdResponse(id=1927763, encodeId=f501192e76375, content=<a href='/topic/show?id=a59234e3b4' target=_blank style='color:#2F92EE;'>#Biotech#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=37, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3473, encryptionId=a59234e3b4, topicName=Biotech)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=226a143, createdName=cathymary, createdTime=Sun Dec 25 13:54:21 CST 2022, time=2022-12-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1645512, encodeId=375316455123e, content=<a href='/topic/show?id=db329364360' target=_blank style='color:#2F92EE;'>#载体#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=51, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=93643, encryptionId=db329364360, topicName=载体)], attachment=null, authenticateStatus=null, createdAvatar=null, 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