The Oncologist:HER2基因改变与微卫星不稳定(MSI-H)在结直肠腺癌中的关系

2021-05-15 yd2015 MedSci原创

在HER2突变病例中发现MSI-H的比例较高,但在HER2扩增病例中未发现MSI-H。携带HER2突变的MSI-H患者使用PD-1抑制剂的无进展生存率较无HER2突变的患者差。

结直肠癌(CRC)在我国恶性肿瘤中发病率排第4,死亡率排第5。目前发现多基因的改变导致结直肠癌的发病。人类表皮生长因子受体2 (HER2)扩增或过表达在转移性结直肠癌中约占3-5%。在HERACLES 和 MyPathway 临床试验中,结直肠癌患者抗HER2的治疗客观缓解率(ORR) 为30% 和38%。但是HER2的扩增似乎对表皮因子生长受体(EGFR)靶向治疗耐药。HER2突变在多种实体瘤中比较常见。但是在结直肠癌中知道的较少。TCGA数据库中发现,CRC中HER2 基因改变为7% (14/212) ,包括 HER2 突变 (2.8%), HER2基因扩增(2.4%), 两者均有 (1.4%)。微卫星不稳定(MSI-H)在CRC中小于5%,通常见于BRAFV600E突变患者。目前HER2基因改变跟MSI-H在CRC中关系不明确。因此,来自中山大学肿瘤防治中心的团队在The Oncologist发表了相关研究成果。

纳入该医院2017.2至2020.2经过二代测序(NGS)以及能够收集到详细临床数据的患者。主要分析HER2基因改变跟MSI-H的关系。研究共纳入731例患者,55例患者(7.5%)伴有HER2基因改变,包括29例(4.0%)HER2 突变,24例 (3.3%) HER2基因扩增,2例(0.2%)同时HER2突变和扩增。R678Q是最常见的突变激酶结构域,在HER2突变病例中未发现HER2激酶结构域的框架插入/缺失。该研究队列中MSI-H患者占5.2%,36.8%的MSI-H患者携带HER2突变。在HER2突变病例中,48.3%为MSI-H,而HER2扩增病例中无一例为MSI-H。

           患者临床特征

            突变类型

HER2基因改变的患者中位无进展期(DFS)为17.6个月。HER2突变和扩增的患者DFS分别为18.4 个月和13.3个月 (p =0 .68)。 MSS-HER2 基因改变和 MSI-H 患者DFS分别为16.2 个月 和 23.4 个月 (p =0 .95)。MSI-H伴有或不伴有HER2 突变患者的DFS没有明显差异(未达到和 23.4 个月,p = 0.65)。MSI-H使用一线治疗患者较MSS患者具有更短的DFS(3.5个月vs11.5个月,p=0.032)。11例HER2基因改变患者接受了抗EGFR治疗,其中5例HER2突变患者,6例HER2扩增患者,HER2突变和扩增组的中位PFS分别为8.2个月和4.1个月(P=0.12)。

                       DFS分析

25例MSI-H的患者接受了PD-1单抗治疗,其中9例携带HER2突变,16例无HER2改变。其中HER2突变患者的ORR和DCR分别为55.6% 和 88.9%,而HER2扩增患者ORR和DCR分别为 64.3% 和100% (p = .68)。虽然两组的中位DFS都尚未达到,但携带HER2突变的MSI-H患者接受PD-1抑制剂治疗的中位PFS显著低于无HER2改变的患者(P=0.036)。

             抗PD1治疗DFS

综上,在HER2突变病例中发现MSI-H的比例较高,但在HER2扩增病例中未发现MSI-H。携带HER2突变的MSI-H患者使用PD-1抑制剂的无进展生存率较无HER2突变的患者差。

原始出处:

Miao-Zhen QiuCai-Yun He , Xin-Hua Yang ,et al. Relationship of HER2 Alteration and Microsatellite Instability Status in Colorectal Adenocarcinoma. Oncologist. 2021 Apr 12.doi: 10.1002/onco.13786. Online ahead of print.

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    2021-05-24 minlingfeng
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    2022-03-12 qjddjq
  4. [GetPortalCommentsPageByObjectIdResponse(id=1866089, encodeId=06d21866089d6, content=<a href='/topic/show?id=16ce133504e' target=_blank style='color:#2F92EE;'>#Oncol#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=40, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=13350, encryptionId=16ce133504e, topicName=Oncol)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=b63894, createdName=minlingfeng, createdTime=Mon May 24 02:14:31 CST 2021, time=2021-05-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1740052, encodeId=e88b1e40052f3, content=<a href='/topic/show?id=1dc741e55ed' target=_blank style='color:#2F92EE;'>#基因改变#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=37, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=41755, encryptionId=1dc741e55ed, topicName=基因改变)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=6eda34632749, createdName=12498adam51暂无昵称, createdTime=Wed Jun 16 16:14:31 CST 2021, time=2021-06-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2078513, encodeId=542720e8513e8, content=<a href='/topic/show?id=9cf9505582e' target=_blank style='color:#2F92EE;'>#微卫星#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=34, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=50558, encryptionId=9cf9505582e, topicName=微卫星)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c49e75, createdName=qjddjq, createdTime=Sat Mar 12 21:14:31 CST 2022, time=2022-03-12, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1453509, encodeId=28411453509f2, content=<a href='/topic/show?id=098ee8679ad' target=_blank style='color:#2F92EE;'>#结直肠#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=31, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=78679, encryptionId=098ee8679ad, topicName=结直肠)], attachment=null, authenticateStatus=null, createdAvatar=/v1.0.0/img/user_icon.png, createdBy=9ace5575596, createdName=crystal0564, createdTime=Mon May 17 12:14:31 CST 2021, time=2021-05-17, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1455171, encodeId=9c6e14551e156, content=<a href='/topic/show?id=bebe8032fc' target=_blank style='color:#2F92EE;'>#GIST#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=41, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=8032, encryptionId=bebe8032fc, topicName=GIST)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=6e445632366, createdName=july_977, createdTime=Mon May 17 12:14:31 CST 2021, time=2021-05-17, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1581119, encodeId=22001581119c5, content=<a href='/topic/show?id=a8ec122803c' target=_blank style='color:#2F92EE;'>#MSI#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=40, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=12280, encryptionId=a8ec122803c, topicName=MSI)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f65a16715482, createdName=小几洁, createdTime=Mon May 17 12:14:31 CST 2021, time=2021-05-17, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1038293, encodeId=7961103829343, content=谢谢梅斯分享这么多精彩信息, beContent=null, objectType=article, channel=null, level=null, likeNumber=0, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=anti-cancer, createdTime=Sun May 16 00:14:31 CST 2021, time=2021-05-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=965924, encodeId=a63296592412, content=突变多,扩增少, beContent=null, objectType=article, channel=null, level=null, likeNumber=59, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTJibu7hwJqpmHiaJgLLmJmcwp0WDTxWI3vqPBO1Mloq21VBOPqziapyibYatvd2QWHWicolL1vbVZHgpRQ/132, createdBy=d16a2107341, createdName=JZ Yang, createdTime=Sat May 15 22:01:07 CST 2021, time=2021-05-15, status=1, ipAttribution=)]
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    2021-05-17 july_977
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    2021-05-17 小几洁
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    2021-05-16 anti-cancer

    谢谢梅斯分享这么多精彩信息

    0

  8. [GetPortalCommentsPageByObjectIdResponse(id=1866089, encodeId=06d21866089d6, content=<a href='/topic/show?id=16ce133504e' target=_blank style='color:#2F92EE;'>#Oncol#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=40, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=13350, encryptionId=16ce133504e, topicName=Oncol)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=b63894, createdName=minlingfeng, createdTime=Mon May 24 02:14:31 CST 2021, time=2021-05-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1740052, encodeId=e88b1e40052f3, content=<a href='/topic/show?id=1dc741e55ed' target=_blank style='color:#2F92EE;'>#基因改变#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=37, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=41755, encryptionId=1dc741e55ed, topicName=基因改变)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=6eda34632749, createdName=12498adam51暂无昵称, createdTime=Wed Jun 16 16:14:31 CST 2021, time=2021-06-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2078513, encodeId=542720e8513e8, content=<a href='/topic/show?id=9cf9505582e' target=_blank style='color:#2F92EE;'>#微卫星#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=34, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=50558, encryptionId=9cf9505582e, topicName=微卫星)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c49e75, createdName=qjddjq, createdTime=Sat Mar 12 21:14:31 CST 2022, time=2022-03-12, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1453509, encodeId=28411453509f2, content=<a href='/topic/show?id=098ee8679ad' target=_blank style='color:#2F92EE;'>#结直肠#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=31, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=78679, encryptionId=098ee8679ad, topicName=结直肠)], attachment=null, authenticateStatus=null, createdAvatar=/v1.0.0/img/user_icon.png, createdBy=9ace5575596, createdName=crystal0564, createdTime=Mon May 17 12:14:31 CST 2021, time=2021-05-17, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1455171, encodeId=9c6e14551e156, content=<a href='/topic/show?id=bebe8032fc' target=_blank style='color:#2F92EE;'>#GIST#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=41, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=8032, encryptionId=bebe8032fc, topicName=GIST)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=6e445632366, createdName=july_977, createdTime=Mon May 17 12:14:31 CST 2021, time=2021-05-17, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1581119, encodeId=22001581119c5, content=<a href='/topic/show?id=a8ec122803c' target=_blank style='color:#2F92EE;'>#MSI#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=40, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=12280, encryptionId=a8ec122803c, topicName=MSI)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f65a16715482, createdName=小几洁, createdTime=Mon May 17 12:14:31 CST 2021, time=2021-05-17, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1038293, encodeId=7961103829343, content=谢谢梅斯分享这么多精彩信息, beContent=null, objectType=article, channel=null, level=null, likeNumber=0, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=anti-cancer, createdTime=Sun May 16 00:14:31 CST 2021, time=2021-05-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=965924, encodeId=a63296592412, content=突变多,扩增少, beContent=null, objectType=article, channel=null, level=null, likeNumber=59, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTJibu7hwJqpmHiaJgLLmJmcwp0WDTxWI3vqPBO1Mloq21VBOPqziapyibYatvd2QWHWicolL1vbVZHgpRQ/132, createdBy=d16a2107341, createdName=JZ Yang, createdTime=Sat May 15 22:01:07 CST 2021, time=2021-05-15, status=1, ipAttribution=)]
    2021-05-15 JZ Yang

    突变多,扩增少

    0

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