Brit J Cancer:微卫星稳定结肠癌拷贝数突变对疾病的影响

2017-07-10 zhangfan MedSci原创

尽管微星稳定的结肠癌患者其体细胞拷贝数异常较为频繁,但其复发区域较少,这种异常主要影响基因的表达并上调相关的癌症信号通路

体细胞拷贝数异常(CNA)在结肠癌(CRC)的进展中发挥重要作用,是常见的变化之一。近日研究人员对CNA进行表征并考察了CNA对基因表达的影响。

研究人员对99名结肠癌患者的单核苷酸队列数据进行研究以获得拷贝数变化。计算拷贝数异常事件并评估拷贝数量对肿瘤的临床、分子特征和基因表达变化之间的关系。根据样本的质量对分析结果进行调整。

研究发现样品间的异质性较高。改变基因组的比例范围为0.04-26.6%。反复的体细胞拷贝数增加发生在7p,8q,13q以及 20染色体而8p,17p以及18染色体表现为累积损失。体细胞突变的数目与总体细胞拷贝数异常显著正相关(r=0.42, P=0.006)。37%的体细胞拷贝数异常区域的基因表达水平发生改变。改变基因与CRC相关的通路的富集有关。根据CMS2 以及 CMS4对肿瘤进行分类后,表现出更频繁的体细胞拷贝数异常。CDK11B基因的小片段1p36.33缺失与患者预后差相关。66%-79%的复发体细胞拷贝数异常能够得到证实。

研究发现,尽管微星稳定的结肠癌患者其体细胞拷贝数异常较为频繁,但其复发区域较少,这种异常主要影响基因的表达并上调相关的癌症信号通路。

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    2017-07-17 qjddjq
  2. [GetPortalCommentsPageByObjectIdResponse(id=2078499, encodeId=3f2c20e8499ae, 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=Mon Jul 17 09:49:00 CST 2017, time=2017-07-17, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1983902, encodeId=20751983902c1, content=<a href='/topic/show?id=3a375629858' target=_blank style='color:#2F92EE;'>#拷贝数#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=26, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=56298, encryptionId=3a375629858, topicName=拷贝数)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=3eaf430, createdName=bsmagic9132, createdTime=Sat Jul 22 16:49:00 CST 2017, time=2017-07-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=221187, encodeId=129a22118ea9, content=学习了,谢谢分享, beContent=null, objectType=article, channel=null, level=null, likeNumber=50, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=550d2008262, createdName=luominglian113, createdTime=Tue Jul 11 23:14:09 CST 2017, time=2017-07-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=220859, encodeId=e53c2208598b, content=感谢小编为我们精心准备了如此精辟的精神大餐,小编辛苦了,点个赞吧!, beContent=null, objectType=article, channel=null, level=null, likeNumber=47, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/NUyjXTCJjo7s7ZCKOmmbBTD6nE7gcd5OZpvyGEzkxBP3S275k5ZJVrsPkotZhBglRHM9rKvcj1OgkssqhcnoPw8zIaMZTF8c/0, createdBy=4c441942088, createdName=ylzr123, createdTime=Tue Jul 11 06:39:23 CST 2017, time=2017-07-11, status=1, ipAttribution=)]
  3. [GetPortalCommentsPageByObjectIdResponse(id=2078499, encodeId=3f2c20e8499ae, 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=Mon Jul 17 09:49:00 CST 2017, time=2017-07-17, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1983902, encodeId=20751983902c1, content=<a href='/topic/show?id=3a375629858' target=_blank style='color:#2F92EE;'>#拷贝数#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=26, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=56298, encryptionId=3a375629858, topicName=拷贝数)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=3eaf430, createdName=bsmagic9132, createdTime=Sat Jul 22 16:49:00 CST 2017, time=2017-07-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=221187, encodeId=129a22118ea9, content=学习了,谢谢分享, beContent=null, objectType=article, channel=null, level=null, likeNumber=50, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=550d2008262, createdName=luominglian113, createdTime=Tue Jul 11 23:14:09 CST 2017, time=2017-07-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=220859, encodeId=e53c2208598b, content=感谢小编为我们精心准备了如此精辟的精神大餐,小编辛苦了,点个赞吧!, beContent=null, objectType=article, channel=null, level=null, likeNumber=47, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/NUyjXTCJjo7s7ZCKOmmbBTD6nE7gcd5OZpvyGEzkxBP3S275k5ZJVrsPkotZhBglRHM9rKvcj1OgkssqhcnoPw8zIaMZTF8c/0, createdBy=4c441942088, createdName=ylzr123, createdTime=Tue Jul 11 06:39:23 CST 2017, time=2017-07-11, status=1, ipAttribution=)]
    2017-07-11 luominglian113

    学习了,谢谢分享

    0

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    2017-07-11 ylzr123

    感谢小编为我们精心准备了如此精辟的精神大餐,小编辛苦了,点个赞吧!

    0