Nat Commun:多发性骨髓瘤患者中BCMA的双等位基因缺失引起CAR-T疗法耐药性的产生

2021-02-09 xiaozeng MedSci原创

靶向BCMA(B细胞成熟抗原)的嵌合抗原受体(CAR)T细胞疗法目前已在复发性难治性的多发性骨髓瘤(MM)中显示出了深远且持久的反应效果

靶向BCMA(B细胞成熟抗原)的嵌合抗原受体(CAR)T细胞疗法目前已在复发性难治性的多发性骨髓瘤(MM)中显示出了深远且持久的反应效果,最初的I/II期研究报告显示该疗法具有73-100%的总体反应率和31–69%的完全反应率。

然而,在既往的一些研究中发现,患者的无进展生存期不到12个月,且观察到疾病的复发以及获得性耐药的产生,这可能会影响第二次CAR-T治疗的效果。

CAR-T细胞疗法的应答和微环境的变化

BCMA靶向嵌合抗原受体(CAR)T细胞疗法已在多发性骨髓瘤中显示出深刻而持久的反应。 然而,经常观察到治疗后的复发,并且耐药机制仍然不清楚。

肿瘤的内在变化

在该研究中,研究人员对来自初始CAR-T细胞治疗后复发的且对再治疗无反应的患者的纵向样本进行了单细胞基因组测序分析。研究人员筛选到了在初次CAR-T治疗后,BCMA的双等位基因缺失突变的样本信息,该基因的一个等位基因缺失而第二个等位基因上携带一个使蛋白翻译提前终止的突变。研究人员发现,该基因的双等位基因缺失会导致第二次治疗时CAR-T细胞增殖的匮乏,且在患者血清中缺乏可溶性的BCMA蛋白。


总而言之,该研究结果表明,在CAR-T治疗后复发的多发性骨髓瘤细胞中,应该留意BCMA基因突变所带来的耐药性作用。


原始出处:

Samur, M.K., Fulciniti, M., Aktas Samur, A. et al. Biallelic loss of BCMA as a resistance mechanism to CAR T cell therapy in a patient with multiple myeloma. Nat Commun 12, 868 (08 February 2021).

 

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    2021-02-26 jml2009
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    2021-05-03 仁者大医
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    2021-09-03 liye789132251
  5. [GetPortalCommentsPageByObjectIdResponse(id=1890219, encodeId=680b1890219fd, content=<a href='/topic/show?id=760c430895a' target=_blank style='color:#2F92EE;'>#多发性#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=28, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=43089, encryptionId=760c430895a, topicName=多发性)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=04d6114, createdName=jml2009, createdTime=Fri Feb 26 19:25:13 CST 2021, time=2021-02-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1781413, encodeId=54841e81413ed, content=<a href='/topic/show?id=8ce8405907' target=_blank style='color:#2F92EE;'>#CAR-#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=28, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4059, encryptionId=8ce8405907, topicName=CAR-)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=8e886, createdName=仁者大医, createdTime=Mon May 03 07:25:13 CST 2021, time=2021-05-03, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1987043, encodeId=2494198e04308, content=<a href='/topic/show?id=8ea3418e3d4' target=_blank style='color:#2F92EE;'>#基因缺失#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=31, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=41873, encryptionId=8ea3418e3d4, topicName=基因缺失)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=909c71, createdName=shijzhiewnjhch, createdTime=Wed Dec 15 15:25:13 CST 2021, time=2021-12-15, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1884972, encodeId=adfe18849e287, content=<a href='/topic/show?id=3b2112532d8' target=_blank style='color:#2F92EE;'>#Nat#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=47, 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 Sep 03 19:25:13 CST 2021, time=2021-09-03, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2087909, encodeId=f9c7208e90982, content=<a href='/topic/show?id=490750196b' target=_blank style='color:#2F92EE;'>#COMMUN#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=36, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=5019, encryptionId=490750196b, topicName=COMMUN)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=7931272, createdName=liuli5079, createdTime=Sun Jul 11 16:25:13 CST 2021, time=2021-07-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1460231, encodeId=2643146023105, content=<a href='/topic/show?id=833732e80d' target=_blank style='color:#2F92EE;'>#BCMA#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=0, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3278, encryptionId=833732e80d, topicName=BCMA)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=85f46265562, createdName=yykkxiaodou, createdTime=Thu Feb 11 14:25:13 CST 2021, time=2021-02-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1484159, encodeId=6de11484159af, content=<a href='/topic/show?id=d2fbe588905' target=_blank style='color:#2F92EE;'>#等位基因#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=36, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=75889, encryptionId=d2fbe588905, topicName=等位基因)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=68e17955541, createdName=luckyshitiancai_42705686, createdTime=Thu Feb 11 14:25:13 CST 2021, time=2021-02-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=923971, encodeId=caf39239e1ff, content=研究越来越细致了, beContent=null, objectType=article, channel=null, level=null, likeNumber=89, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20200914/f1df8506d5cb4909bac2efc340b6c1fe/dcc6dd2dbec44613838b555fbe723804.jpg, createdBy=686b1371609, createdName=liyu7822, createdTime=Tue Feb 09 23:28:06 CST 2021, time=2021-02-09, status=1, ipAttribution=)]
    2021-07-11 liuli5079
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    2021-02-11 yykkxiaodou
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    2021-02-09 liyu7822

    研究越来越细致了

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