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Nat Commun:拷贝数而非表观遗传改变是肿瘤印记甲基化的关键

2017-09-24 MedSci MedSci原创

既往研究认为印记畸变在肿瘤中十分常见。为了了解印记在癌症发生发展中的作用,研究人员对280多个癌细胞株的拷贝数和甲基化进行了表征,并在原发性肿瘤中证实了研究人员的发现。印迹差异甲基化区域(DMR)以顺式调节相邻转录物亲本来源的单等位基因的表达。与可能易于发生高甲基化的单拷贝CpG岛不同,印记的DMRs可能在肿瘤发生过程中松动或增加甲基化。本研究中,研究人员发现,印记的DMR的甲基化谱通常不代表真正

既往研究认为印记畸变在肿瘤中十分常见。为了了解印记在癌症发生发展中的作用,研究人员对280多个癌细胞株的拷贝数和甲基化进行了表征,并在原发性肿瘤中证实了研究人员的发现。

印迹差异甲基化区域(DMR)以顺式调节相邻转录物亲本来源的单等位基因的表达。与可能易于发生高甲基化的单拷贝CpG岛不同,印记的DMRs可能在肿瘤发生过程中松动或增加甲基化。本研究中,研究人员发现,印记的DMR的甲基化谱通常不代表真正的表观遗传变化,而仅仅是潜在的拷贝数像差(CNA)的积累,且独立于从癌症易感基因座推断出的基因组甲基化状态。

总之,该研究结果表明,随着拷贝中性杂合性缺失或扩增CNA也可影响等位基因表达,表明印迹的维持,尽管通过RNA FISH并没有观察到作为单个表达点。

原始出处:


Alex Martin-Trujillo, Enrique Vidal, et al., Copy number rather than epigenetic alterations are the major dictator of imprinted methylation in tumors. Nat Commun. 2017; 8: 467. Published online 2017 Sep 7. doi: 10.1038/s41467-017-00639-9

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    2018-03-16 liuli5079
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    2017-10-09 liye789132251
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    2017-09-25 luominglian113

    学习了.谢谢分享

    0

  5. [GetPortalCommentsPageByObjectIdResponse(id=1983904, encodeId=5d9819839040c, 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=73, 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 Dec 09 04:10:00 CST 2017, time=2017-12-09, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2087130, encodeId=51b0208e130eb, content=<a href='/topic/show?id=490750196b' target=_blank style='color:#2F92EE;'>#COMMUN#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=76, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=5019, encryptionId=490750196b, topicName=COMMUN)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=7931272, createdName=liuli5079, createdTime=Fri Mar 16 05:10:00 CST 2018, time=2018-03-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1882468, encodeId=71641882468b2, content=<a href='/topic/show?id=3b2112532d8' target=_blank style='color:#2F92EE;'>#Nat#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=61, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=12532, encryptionId=3b2112532d8, topicName=Nat)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2e6f107, createdName=liye789132251, createdTime=Mon Oct 09 08:10:00 CST 2017, time=2017-10-09, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=247401, encodeId=5a8824e4011a, content=学习了.谢谢分享, beContent=null, objectType=article, channel=null, level=null, likeNumber=90, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=550d2008262, createdName=luominglian113, createdTime=Mon Sep 25 00:38:44 CST 2017, time=2017-09-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=247296, encodeId=969824e296fd, content=谢谢分享.学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=92, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/Q3auHgzwzM4o2XVpJ6449yqDsjibydI5HnJ8MibGxNn4HZiaZib0bdfibbwoz3KQrIyN9AGxq36ZlZRNicYlPfOOWMtwgsajY6mGNFiaPclFdowjD0/0, createdBy=97bd1338592, createdName=清风拂面, createdTime=Sun Sep 24 12:44:20 CST 2017, time=2017-09-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=247287, encodeId=753424e28746, content=学习了新知识, beContent=null, objectType=article, channel=null, level=null, likeNumber=97, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20201006/4db877c2887649beb09cb5effd0b38c7/916f66edd48a4e77b20ebc3e14b6e45c.jpg, createdBy=141e1980133, createdName=Y—xianghai, createdTime=Sun Sep 24 12:30:25 CST 2017, time=2017-09-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=247278, encodeId=c0ee24e27887, content=学习了.涨知识, beContent=null, objectType=article, channel=null, level=null, likeNumber=88, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20220115/46bcf39c32de4aa6b45c5f9d66c8ee77/6cb4a20c55bb4b7691122f47747bfca2.jpg, createdBy=9dad1662329, createdName=1ddf0692m34(暂无匿称), createdTime=Sun Sep 24 12:27:55 CST 2017, time=2017-09-24, status=1, ipAttribution=)]
    2017-09-24 清风拂面

    谢谢分享.学习了

    0

  6. [GetPortalCommentsPageByObjectIdResponse(id=1983904, encodeId=5d9819839040c, 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=73, 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 Dec 09 04:10:00 CST 2017, time=2017-12-09, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2087130, encodeId=51b0208e130eb, content=<a href='/topic/show?id=490750196b' target=_blank style='color:#2F92EE;'>#COMMUN#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=76, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=5019, encryptionId=490750196b, topicName=COMMUN)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=7931272, createdName=liuli5079, createdTime=Fri Mar 16 05:10:00 CST 2018, time=2018-03-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1882468, encodeId=71641882468b2, content=<a href='/topic/show?id=3b2112532d8' target=_blank style='color:#2F92EE;'>#Nat#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=61, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=12532, encryptionId=3b2112532d8, topicName=Nat)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2e6f107, createdName=liye789132251, createdTime=Mon Oct 09 08:10:00 CST 2017, time=2017-10-09, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=247401, encodeId=5a8824e4011a, content=学习了.谢谢分享, beContent=null, objectType=article, channel=null, level=null, likeNumber=90, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=550d2008262, createdName=luominglian113, createdTime=Mon Sep 25 00:38:44 CST 2017, time=2017-09-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=247296, encodeId=969824e296fd, content=谢谢分享.学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=92, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/Q3auHgzwzM4o2XVpJ6449yqDsjibydI5HnJ8MibGxNn4HZiaZib0bdfibbwoz3KQrIyN9AGxq36ZlZRNicYlPfOOWMtwgsajY6mGNFiaPclFdowjD0/0, createdBy=97bd1338592, createdName=清风拂面, createdTime=Sun Sep 24 12:44:20 CST 2017, time=2017-09-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=247287, encodeId=753424e28746, content=学习了新知识, beContent=null, objectType=article, channel=null, level=null, likeNumber=97, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20201006/4db877c2887649beb09cb5effd0b38c7/916f66edd48a4e77b20ebc3e14b6e45c.jpg, createdBy=141e1980133, createdName=Y—xianghai, createdTime=Sun Sep 24 12:30:25 CST 2017, time=2017-09-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=247278, encodeId=c0ee24e27887, content=学习了.涨知识, beContent=null, objectType=article, channel=null, level=null, likeNumber=88, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20220115/46bcf39c32de4aa6b45c5f9d66c8ee77/6cb4a20c55bb4b7691122f47747bfca2.jpg, createdBy=9dad1662329, createdName=1ddf0692m34(暂无匿称), createdTime=Sun Sep 24 12:27:55 CST 2017, time=2017-09-24, status=1, ipAttribution=)]
    2017-09-24 Y—xianghai

    学习了新知识

    0

  7. [GetPortalCommentsPageByObjectIdResponse(id=1983904, encodeId=5d9819839040c, 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=73, 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 Dec 09 04:10:00 CST 2017, time=2017-12-09, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2087130, encodeId=51b0208e130eb, content=<a href='/topic/show?id=490750196b' target=_blank style='color:#2F92EE;'>#COMMUN#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=76, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=5019, encryptionId=490750196b, topicName=COMMUN)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=7931272, createdName=liuli5079, createdTime=Fri Mar 16 05:10:00 CST 2018, time=2018-03-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1882468, encodeId=71641882468b2, content=<a href='/topic/show?id=3b2112532d8' target=_blank style='color:#2F92EE;'>#Nat#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=61, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=12532, encryptionId=3b2112532d8, topicName=Nat)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2e6f107, createdName=liye789132251, createdTime=Mon Oct 09 08:10:00 CST 2017, time=2017-10-09, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=247401, encodeId=5a8824e4011a, content=学习了.谢谢分享, beContent=null, objectType=article, channel=null, level=null, likeNumber=90, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=550d2008262, createdName=luominglian113, createdTime=Mon Sep 25 00:38:44 CST 2017, time=2017-09-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=247296, encodeId=969824e296fd, content=谢谢分享.学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=92, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/Q3auHgzwzM4o2XVpJ6449yqDsjibydI5HnJ8MibGxNn4HZiaZib0bdfibbwoz3KQrIyN9AGxq36ZlZRNicYlPfOOWMtwgsajY6mGNFiaPclFdowjD0/0, createdBy=97bd1338592, createdName=清风拂面, createdTime=Sun Sep 24 12:44:20 CST 2017, time=2017-09-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=247287, encodeId=753424e28746, content=学习了新知识, beContent=null, objectType=article, channel=null, level=null, likeNumber=97, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20201006/4db877c2887649beb09cb5effd0b38c7/916f66edd48a4e77b20ebc3e14b6e45c.jpg, createdBy=141e1980133, createdName=Y—xianghai, createdTime=Sun Sep 24 12:30:25 CST 2017, time=2017-09-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=247278, encodeId=c0ee24e27887, content=学习了.涨知识, beContent=null, objectType=article, channel=null, level=null, likeNumber=88, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20220115/46bcf39c32de4aa6b45c5f9d66c8ee77/6cb4a20c55bb4b7691122f47747bfca2.jpg, createdBy=9dad1662329, createdName=1ddf0692m34(暂无匿称), createdTime=Sun Sep 24 12:27:55 CST 2017, time=2017-09-24, status=1, ipAttribution=)]
    2017-09-24 1ddf0692m34(暂无匿称)

    学习了.涨知识

    0

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