ASCO2017:从临床组织和液体活检样本中发现了前列腺癌的BRCA1/2基因回复突变

2017-06-06 MedSci MedSci原创

在BRCA1或BRCA2(BRCA)中带有基因组改变(GA)的前列腺肿瘤可能对PARP抑制剂(PARPi)的治疗很敏感。然而,继发性回复突变(revGA)可能会恢复BRCA基因的功能,并降低对PARP抑制剂(PARPi)的治疗或基于白金(Pt)疗法的治疗的敏感性。使用组织或液体活组织检查进行全面的基因组分析(CGP),可以检测出临床相关的revGA的多样性。

在BRCA1或BRCA2(BRCA)中带有基因组改变(GA)的前列腺肿瘤可能对PARP抑制剂(PARPi)的治疗很敏感。然而,继发性回复突变(revGA)可能会恢复BRCA基因的功能,并降低对PARP抑制剂(PARPi)的治疗或基于白金(Pt)疗法的治疗的敏感性。使用组织或液体活组织检查进行全面的基因组分析(CGP),可以检测出临床相关的revGA的多样性。

对1911名主要复发、难治性或转移性前列腺癌患者进行常规临床治疗时,从石蜡包埋(FFPE)肿瘤组织或血液样本中提取DNA,并采用杂交捕获(HC)实验和新一代测序技术对所有类型的基因组改变(GA)进行分析,包括碱基替换、插入和缺失、重组和拷贝数变化。

如果在基因序列中有一个无意义的或移码突变(fs)的基因改变(GA),回复突变(revGA)可以使任何一种基因组改变(GA)恢复阅读框架。

研究结果显示:216/1911(11.3%)前列腺癌肿瘤患者至少有1个有害的BRCA基因组改变(GA)。其中,7个样本在BRCA1(1)或BRCA2(6)中有潜在的revGA:前列腺腺泡状腺癌(5),神经内分泌癌(1),或未分化的癌(1);其中2个样本是液体活组织检查(血液),4个是石蜡包埋(FFPE)组织样本(肝脏),1个样本是骨髓芯活检。所有带有revGA的样本都是转移性肿瘤。潜在的revGA有3种类型:重叠插入缺失(4),补偿性的移码突变(fs)(2)和错义(1)。有个样本有两种revGA:一个重叠插入缺失和一个补偿性的移码突变。TMPRSS2(融合基因)、PTEN基因和AR的改变频率与BRCA基因突变相似或者不相似;revga-阳性样本在PTEN基因变化方面有轻微的增加(42.9%vs.33.8%,无显着性差异(NS))。在BRCA基因突变型的肿瘤中,CDK12改变的频率显着降低(0.9%vs .6.9%,p=0.00002)。患者的回复突变的临床病史将会出现。

1911名前列腺癌患者的基因组分析(CGP)显示,11.3%的患者至少有1个有害的BRCA1/2基因。从这些病例中,我们发现了7个样本在BRCA1(1)或BRCA2(6)中有潜在的回复突变(revGA):前列腺腺泡状腺癌(5),神经内分泌癌(1),或未分化的癌(1)。尽管很少,但说明回复突变(revGA)可以在治疗过程中获得,并且可能是对PARP抑制剂(PARPi)的治疗或基于白金(Pt)疗法的治疗的抵抗。而且,BRCA基因回复突变( revGA)可以从组织和液体活检中检测出来。

原始出处
Sugganth Daniel, Erica Gornstein, Garrett Michael Frampton,et al. BRCA1/2 reversion mutations in prostate cancer identified from clinical tissue and liquid biopsy samples. 2017 ASCO Annual Meeting. June 2017.

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    2017-09-11 zhzhxiang
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    2017-09-23 quxin068
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    2017-06-08 luominglian113

    学习了,谢谢分享

    0

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    2017-06-08 smlt2008
  5. [GetPortalCommentsPageByObjectIdResponse(id=1669367, encodeId=72f3166936e56, content=<a href='/topic/show?id=9d7b620395d' target=_blank style='color:#2F92EE;'>#样本#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=41, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=62039, encryptionId=9d7b620395d, topicName=样本)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f33226554040, createdName=zhzhxiang, createdTime=Mon Sep 11 11:59:00 CST 2017, time=2017-09-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1938705, encodeId=cdb41938e0543, content=<a href='/topic/show?id=1c292818fd' target=_blank style='color:#2F92EE;'>#ASC#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=42, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=2818, encryptionId=1c292818fd, topicName=ASC)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=74808, createdName=quxin068, createdTime=Sat Sep 23 20:59:00 CST 2017, time=2017-09-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=208165, encodeId=63ab20816564, content=学习了,谢谢分享, beContent=null, objectType=article, channel=null, level=null, likeNumber=61, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=550d2008262, createdName=luominglian113, createdTime=Thu Jun 08 13:43:19 CST 2017, time=2017-06-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1278010, encodeId=437912e8010ae, content=<a href='/topic/show?id=d34e6523544' target=_blank style='color:#2F92EE;'>#活检#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=39, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=65235, encryptionId=d34e6523544, topicName=活检)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c39f145, createdName=smlt2008, createdTime=Thu Jun 08 11:59:00 CST 2017, time=2017-06-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1423295, encodeId=571b1423295ab, content=<a href='/topic/show?id=504c368e51' target=_blank style='color:#2F92EE;'>#BRCA1#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=36, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3687, encryptionId=504c368e51, topicName=BRCA1)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=7a3d3767712, createdName=caobinglei8080, createdTime=Thu Jun 08 11:59:00 CST 2017, time=2017-06-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1518973, encodeId=9cc115189e3bf, content=<a href='/topic/show?id=da4e368832' target=_blank style='color:#2F92EE;'>#BRCA1/2#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=48, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3688, encryptionId=da4e368832, topicName=BRCA1/2)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=63ce11226326, createdName=fangcong, createdTime=Thu Jun 08 11:59:00 CST 2017, time=2017-06-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1594005, encodeId=b4711594005a7, content=<a href='/topic/show?id=63cc368459' target=_blank style='color:#2F92EE;'>#BRCA#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=35, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3684, encryptionId=63cc368459, topicName=BRCA)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=a12645, createdName=智智灵药, createdTime=Thu Jun 08 11:59:00 CST 2017, time=2017-06-08, status=1, ipAttribution=)]
  6. [GetPortalCommentsPageByObjectIdResponse(id=1669367, encodeId=72f3166936e56, content=<a href='/topic/show?id=9d7b620395d' target=_blank style='color:#2F92EE;'>#样本#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=41, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=62039, encryptionId=9d7b620395d, topicName=样本)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f33226554040, createdName=zhzhxiang, createdTime=Mon Sep 11 11:59:00 CST 2017, time=2017-09-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1938705, encodeId=cdb41938e0543, content=<a href='/topic/show?id=1c292818fd' target=_blank style='color:#2F92EE;'>#ASC#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=42, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=2818, encryptionId=1c292818fd, topicName=ASC)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=74808, createdName=quxin068, createdTime=Sat Sep 23 20:59:00 CST 2017, time=2017-09-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=208165, encodeId=63ab20816564, content=学习了,谢谢分享, beContent=null, objectType=article, channel=null, level=null, likeNumber=61, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=550d2008262, createdName=luominglian113, createdTime=Thu Jun 08 13:43:19 CST 2017, time=2017-06-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1278010, encodeId=437912e8010ae, content=<a href='/topic/show?id=d34e6523544' target=_blank style='color:#2F92EE;'>#活检#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=39, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=65235, encryptionId=d34e6523544, topicName=活检)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c39f145, createdName=smlt2008, createdTime=Thu Jun 08 11:59:00 CST 2017, time=2017-06-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1423295, encodeId=571b1423295ab, content=<a href='/topic/show?id=504c368e51' target=_blank style='color:#2F92EE;'>#BRCA1#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=36, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3687, encryptionId=504c368e51, topicName=BRCA1)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=7a3d3767712, createdName=caobinglei8080, createdTime=Thu Jun 08 11:59:00 CST 2017, time=2017-06-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1518973, encodeId=9cc115189e3bf, content=<a href='/topic/show?id=da4e368832' target=_blank style='color:#2F92EE;'>#BRCA1/2#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=48, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3688, encryptionId=da4e368832, topicName=BRCA1/2)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=63ce11226326, createdName=fangcong, createdTime=Thu Jun 08 11:59:00 CST 2017, time=2017-06-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1594005, encodeId=b4711594005a7, content=<a href='/topic/show?id=63cc368459' target=_blank style='color:#2F92EE;'>#BRCA#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=35, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3684, encryptionId=63cc368459, topicName=BRCA)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=a12645, createdName=智智灵药, createdTime=Thu Jun 08 11:59:00 CST 2017, time=2017-06-08, status=1, ipAttribution=)]
    2017-06-08 fangcong
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    2017-06-08 智智灵药

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