Science:最“安全”基因治疗载体似乎并不安全,血友病患者接受治疗后患上肝癌

2020-12-26 生物探索 生物探索

荷兰生物制药公司uniQure的一项针对B型血友病的基因疗法被美国FDA叫停,起因是接受治疗后该患者患上了肝细胞癌。

长期以来,腺相关病毒载体(AAV)由于具有长期潜伏于人体而不表现出任何明显致病性的优点被公认是目前最理想的基因治疗基因载体。然而,近年来不断有声音提醒,这一看似安全的疗法或许存在着致命的风险。

当地时间12月22日,《Science》发布了一篇题为“Liver tumor in gene therapy recipient raises concerns about virus widely used in treatment”的文章再次印证了这一观点。报道称,荷兰生物制药公司uniQure的一项针对B型血友病的基因疗法被美国FDA叫停,起因是接受治疗后该患者患上了肝细胞癌。

doi:10.1126 / science.abg2917

处于舆论中心的是一种基于AAV5病毒载体的基因疗法,该疗法此前曾被FDA授予突破性疗法称号以及EMA授予优先药品(PRIME)称号。从此前的临床数据来看,这一疗法疗效颇佳。

2019年uniQure公司曾在第27届国际血栓和止血学会(ISTH)上分享了该疗法的2期临床数据,显示三名患者在治疗36周后FIX活性高达正常值的54%,平均值为正常值的45%。

此次遭到搁置的3期临床实验涉及54名患者。在刚刚过去的第62届美国血液病学会年会上,uniQure公司分享了初期实验数据,显示在给药26周后,患者FIX水平从≤2%提高至37.2%,达到试验主要终点,接受一次性基因治疗6个月后,重症患者似乎已经转变为功能性治愈状态。

根据此次uniQure发表的声明,有理由相信可能是患者体内的潜在疾病使他患上癌症。据介绍,这位肝癌患者25年前曾经感染了乙肝病毒和丙肝病毒,而这些病毒的慢性感染与80%的肝细胞癌有关。尽管如此,但是更重要的问题是要确定AAV基因治疗是否与此次事件有关,或者说促进了患者肝癌的发生。

2020年11月,《Nature Biotechnology》发表了一篇题为A long-term study of AAV gene therapy in dogs with hemophilia A identifies clonal expansions of transduced liver cells 的研究论文。文章提到,在对9只A 型血友病犬进行AAV 基因治疗10年后,竟然发现 AAV 病毒携带的治疗性基因片段有些被整合到了狗的染色体上控制生长的基因附近,显示有诱发癌症的可能性。

在此之前,AAV血液病基因疗法已经显示出可能存在肝受损风险。2001年,费城儿童医院开展的AAV2(载有FIX基因)的临床试验中就报道出了肝脏受损情况,其他类型AAV载体的临床试验中也同样也出现了这种情况。

加拿大女王大学的血友病研究者David Lillicrap说:“尽管这名肝癌患者接受治疗的时间较短,将患癌症原因归咎于AAV基因治疗似乎不太合理,但是如果患者体内已经产生了一个缓慢生长的肝脏肿块,那么AAV可能会以一种能够刺激癌细胞更快生长的方式插入到他的肝细胞的DNA中。”

这或许也是uniQure这项研究的不足之处,并没有将既往HCV和HIV感染者排除在外。目前该公司正在与FDA展开合作,对这一事件背后的起因展开调查,预计2021年初将获得调查结果。

原始出处:

Jocelyn Kaiser. Liver tumor in gene therapy recipient raises concerns about virus widely used in treatment. Science, 2020.

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  1. [GetPortalCommentsPageByObjectIdResponse(id=1645491, encodeId=aea016454911d, content=<a href='/topic/show?id=db329364360' target=_blank style='color:#2F92EE;'>#载体#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=41, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=93643, encryptionId=db329364360, topicName=载体)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=58cb23213384, createdName=mei539, createdTime=Wed Dec 01 07:45:18 CST 2021, time=2021-12-01, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=911366, encodeId=c59b91136693, content=最“安全”基因治疗载体似乎并不安全, beContent=null, objectType=article, channel=null, level=null, likeNumber=196, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=/v1.0.0/img/user_icon.png, createdBy=a37a1710612, createdName=oo902, createdTime=Sun Dec 27 19:45:31 CST 2020, time=2020-12-27, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1376225, encodeId=3c2713e622548, content=<a href='/topic/show?id=2949159989d' target=_blank style='color:#2F92EE;'>#SCIE#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=40, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=15998, encryptionId=2949159989d, topicName=SCIE)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=395f25, createdName=爆笑小医, createdTime=Mon Dec 28 05:45:18 CST 2020, time=2020-12-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=911460, encodeId=f430911460a1, content=很好的文章,学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=184, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20201226/95ac6d022b194200b46211c8dd67d7d4/d7639abce33d42f18edacbf9c1818b2b.jpg, createdBy=1c242248512, createdName=医路顺丰, createdTime=Sun Dec 27 22:42:43 CST 2020, time=2020-12-27, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=911247, encodeId=f67291124e7a, content=每种新疗法的成功离不开反复的临床实践, beContent=null, objectType=article, channel=null, level=null, likeNumber=180, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=80281647335, createdName=chenxianglei, createdTime=Sun Dec 27 15:16:59 CST 2020, time=2020-12-27, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1040331, encodeId=603e1040331f5, content=肝癌,接下来就要细分了,对于体质好的病人,能否将PD-1类+抗血管新生+放疗等相结合,甚至有必要用TACE进行减负, beContent=null, objectType=article, channel=null, level=null, likeNumber=111, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=留走人康, createdTime=Sat Dec 26 17:45:18 CST 2020, time=2020-12-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=911112, encodeId=ccf49111126c, content=学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=175, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTIh7Hl0OZkSsRsGYucFqrWWcM94wGdtDibxrpjlaic69QFmP5kHF5MJ0vWibLkNu18xEJUKpoHGLFb7g/132, createdBy=2d592485389, createdName=zhao..doctor.., createdTime=Sat Dec 26 17:21:11 CST 2020, time=2020-12-26, status=1, ipAttribution=)]
    2021-12-01 mei539
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    2020-12-27 oo902

    最“安全”基因治疗载体似乎并不安全

    0

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    2020-12-28 爆笑小医
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    2020-12-27 医路顺丰

    很好的文章,学习了

    0

  5. [GetPortalCommentsPageByObjectIdResponse(id=1645491, encodeId=aea016454911d, content=<a href='/topic/show?id=db329364360' target=_blank style='color:#2F92EE;'>#载体#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=41, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=93643, encryptionId=db329364360, topicName=载体)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=58cb23213384, createdName=mei539, createdTime=Wed Dec 01 07:45:18 CST 2021, time=2021-12-01, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=911366, encodeId=c59b91136693, content=最“安全”基因治疗载体似乎并不安全, beContent=null, objectType=article, channel=null, level=null, likeNumber=196, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=/v1.0.0/img/user_icon.png, createdBy=a37a1710612, createdName=oo902, createdTime=Sun Dec 27 19:45:31 CST 2020, time=2020-12-27, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1376225, encodeId=3c2713e622548, content=<a href='/topic/show?id=2949159989d' target=_blank style='color:#2F92EE;'>#SCIE#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=40, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=15998, encryptionId=2949159989d, topicName=SCIE)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=395f25, createdName=爆笑小医, createdTime=Mon Dec 28 05:45:18 CST 2020, time=2020-12-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=911460, encodeId=f430911460a1, content=很好的文章,学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=184, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20201226/95ac6d022b194200b46211c8dd67d7d4/d7639abce33d42f18edacbf9c1818b2b.jpg, createdBy=1c242248512, createdName=医路顺丰, createdTime=Sun Dec 27 22:42:43 CST 2020, time=2020-12-27, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=911247, encodeId=f67291124e7a, content=每种新疗法的成功离不开反复的临床实践, beContent=null, objectType=article, channel=null, level=null, likeNumber=180, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=80281647335, createdName=chenxianglei, createdTime=Sun Dec 27 15:16:59 CST 2020, time=2020-12-27, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1040331, encodeId=603e1040331f5, content=肝癌,接下来就要细分了,对于体质好的病人,能否将PD-1类+抗血管新生+放疗等相结合,甚至有必要用TACE进行减负, beContent=null, objectType=article, channel=null, level=null, likeNumber=111, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=留走人康, createdTime=Sat Dec 26 17:45:18 CST 2020, time=2020-12-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=911112, encodeId=ccf49111126c, content=学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=175, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTIh7Hl0OZkSsRsGYucFqrWWcM94wGdtDibxrpjlaic69QFmP5kHF5MJ0vWibLkNu18xEJUKpoHGLFb7g/132, createdBy=2d592485389, createdName=zhao..doctor.., createdTime=Sat Dec 26 17:21:11 CST 2020, time=2020-12-26, status=1, ipAttribution=)]
    2020-12-27 chenxianglei

    每种新疗法的成功离不开反复的临床实践

    0

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    2020-12-26 留走人康

    肝癌,接下来就要细分了,对于体质好的病人,能否将PD-1类+抗血管新生+放疗等相结合,甚至有必要用TACE进行减负

    0

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    2020-12-26 zhao..doctor..

    学习了

    0

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