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SCIENCE:肿瘤错配修复缺陷影响抗PD-1免疫疗法效果

2019-05-04 海北 MedSci原创

这种高突变负荷使肿瘤具有免疫原性并对程序性细胞死亡-1(PD-1)免疫检查点抑制剂敏感。然而,尽管它们具有肿瘤免疫原性,但MMR缺陷型肿瘤患者的反应变化很大,大约一半的患者难以治疗。

具有错配修复缺陷(MMR-d)的肿瘤的特征在于微卫星的序列改变,并且其可累积数千个突变。

这种高突变负荷使肿瘤具有免疫原性并对程序性细胞死亡-1PD-1免疫检查点抑制剂敏感。然而,尽管它们具有肿瘤免疫原性,但MMR缺陷型肿瘤患者的反应变化很大,大约一半的患者难以治疗。

最近,研究人员提出的实验和临床证据表明,微卫星不稳定性(MSI)和所产生的突变负荷的程度部分地构成了MMR-d人和小鼠肿瘤中对PD-1阻断免疫疗法的可变反应的基础。响应程度特别与插入 - 缺失(插入缺失)突变负荷的累积有关。

该研究为MSI强度和突变负荷的全基因组表征提供了理论基础,以更好地描述对MMR缺陷型人类癌症的抗PD-1免疫疗法的反应。


原始出处:

Mandal R et al. Genetic diversity of tumors with mismatch repair deficiency influences anti-PD-1 immunotherapy response. SCIENCE, 2019; doi: 10.1126/science.aau0447.


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    2019-05-06 jichang
  4. [GetPortalCommentsPageByObjectIdResponse(id=1647732, encodeId=b72f164e732d9, content=<a href='/topic/show?id=01e9139044b' target=_blank style='color:#2F92EE;'>#PD-1免疫疗法#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=137, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=13904, encryptionId=01e9139044b, topicName=PD-1免疫疗法)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=d33523471030, createdName=crystal0570, createdTime=Tue Aug 06 09:30:00 CST 2019, time=2019-08-06, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1645532, encodeId=ab621645532b6, content=<a href='/topic/show?id=20c296e40e2' target=_blank style='color:#2F92EE;'>#错配修复缺陷#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=81, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=96740, encryptionId=20c296e40e2, topicName=错配修复缺陷)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=a68823222118, createdName=李研东, createdTime=Fri Jan 31 19:30:00 CST 2020, time=2020-01-31, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1375936, encodeId=dba613e5936af, content=<a href='/topic/show?id=2949159989d' target=_blank style='color:#2F92EE;'>#SCIE#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=70, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=15998, encryptionId=2949159989d, topicName=SCIE)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=17a3387, createdName=jichang, createdTime=Mon May 06 02:30:00 CST 2019, time=2019-05-06, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1046811, encodeId=af331046811af, content=疗效只是效果的众多方面之一,还要看对患者的获益,包括生活质量等因素共同决定效果的, beContent=null, objectType=article, channel=null, level=null, likeNumber=94, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=CHANGE, createdTime=Sat May 04 14:30:00 CST 2019, time=2019-05-04, status=1, ipAttribution=)]
    2019-05-04 CHANGE

    疗效只是效果的众多方面之一,还要看对患者的获益,包括生活质量等因素共同决定效果的

    0

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