Nat Commun:c-Myc激活泛癌表达的lncRNA MILIP失活p53并诱导癌症的发生

2020-10-16 xiaozeng MedSci原创

MYC作为特征最明确的原癌基因,在约40%的人类癌症中,染色体易位、基因扩增和上游致癌信号均能够异常激活MYC基因。其产物c-Myc是一种转录因子,可调节涉及多种细胞功能(包括细胞存活和增殖)在内的数

MYC作为特征最明确的原癌基因,在约40%的人类癌症中,染色体易位、基因扩增和上游致癌信号均能够异常激活MYC基因。其产物c-Myc是一种转录因子,可调节涉及多种细胞功能(包括细胞存活和增殖)在内的数千个基因。

既往研究显示,原癌蛋白c-Myc和肿瘤抑制因子p53在调控正常细胞存活和增殖中是一种“阴和阳”的密不可分的关系,它们的这种功能也维持组织的稳态:c-Myc能够诱导ARF肿瘤抑制因子的表达,随后结合并抑制MDM2的表达,最终引起p53的激活;而p53能够通过包括转录失活和microRNA介导的抑制作用在内的多种机制来对c-Myc起抑制作用。然而,在癌细胞中并不存在c-Myc和p53之间的相互调节作用,而这一点也可以由野生型p53中c-Myc的表达失衡可以看出。

c-Myc激活泛癌lncRNA MILIP抑制p53

尽管癌细胞中p53的抑制通常与ARF的缺失相关,研究人员发现了另一种机制,c-Myc能够通过c-Myc诱导型长非编码RNA失活P53(lncRNA MILIP)这一作用来失活p53。MILIP能够通过抑制TRIML2的表达来降低p53的类泛素化修饰,从而促进p53的多聚泛素化和转化。在多种癌症类型中均能观察到MILIP的表达上调,且发现其对细胞的存活、分裂和致瘤性具有贡献。

MILIP促进癌症的发生

综上,该研究结果揭示了c-Myc与p53抑制的相关机制,即通过泛癌表达的lncRNA靶向抑制p53这一信号通路。


原始出处:

Feng, Y.C., Liu, X.Y., Teng, L. et al. c-Myc inactivation of p53 through the pan-cancer lncRNA MILIP drives cancer pathogenesis. Nat Commun 11, 4980 (05 October 2020).

 

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    2021-04-07 liuli5079
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    2020-12-20 liye789132251
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    2020-10-18 guihongzh
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    2020-10-18 xzw113
  6. [GetPortalCommentsPageByObjectIdResponse(id=2087804, encodeId=3b12208e804b7, content=<a href='/topic/show?id=490750196b' target=_blank style='color:#2F92EE;'>#COMMUN#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=36, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=5019, encryptionId=490750196b, topicName=COMMUN)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=7931272, createdName=liuli5079, createdTime=Wed Apr 07 02:20:15 CST 2021, time=2021-04-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1884728, encodeId=72c41884e28a3, content=<a href='/topic/show?id=3b2112532d8' target=_blank style='color:#2F92EE;'>#Nat#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=25, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=12532, encryptionId=3b2112532d8, topicName=Nat)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2e6f107, createdName=liye789132251, createdTime=Sun Dec 20 09:20:15 CST 2020, time=2020-12-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2005741, encodeId=fa6e2005e414e, content=<a href='/topic/show?id=6ff1525e13' target=_blank style='color:#2F92EE;'>#CRN#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=35, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=5257, encryptionId=6ff1525e13, topicName=CRN)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=35fc2500023, createdName=yanjie6253_56072842, createdTime=Wed Aug 25 05:20:15 CST 2021, time=2021-08-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1274840, encodeId=81ee12e4840cc, content=<a href='/topic/show?id=1bbc12404ba' target=_blank style='color:#2F92EE;'>#MYC#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=35, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=12404, encryptionId=1bbc12404ba, topicName=MYC)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=66ec123, createdName=guihongzh, createdTime=Sun Oct 18 13:20:15 CST 2020, time=2020-10-18, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1301937, encodeId=3c18130193ed0, content=<a href='/topic/show?id=b469109e41d' target=_blank style='color:#2F92EE;'>#lncRNA#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=49, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=10974, encryptionId=b469109e41d, topicName=lncRNA)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2317301, createdName=xzw113, createdTime=Sun Oct 18 13:20:15 CST 2020, time=2020-10-18, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1372433, encodeId=d3be13e24337c, content=<a href='/topic/show?id=9d861362e53' target=_blank style='color:#2F92EE;'>#p53#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=38, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=13627, encryptionId=9d861362e53, topicName=p53)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=5d70341, createdName=zhishijing, createdTime=Sun Oct 18 13:20:15 CST 2020, time=2020-10-18, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1530305, encodeId=9b4f153030558, content=<a href='/topic/show?id=2c9738e9d2' target=_blank style='color:#2F92EE;'>#c-myc#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=33, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3879, encryptionId=2c9738e9d2, topicName=c-myc)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=8d3b12082233, createdName=lixiaol, createdTime=Sun Oct 18 13:20:15 CST 2020, time=2020-10-18, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=892581, encodeId=cbf189258122, content=学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=86, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20210725/69b5882b3c3845c19efa131b4ff8b1f7/06ccd8f1857e4e14862049ab235618eb.jpg, createdBy=74c72110107, createdName=Nebula-Qin, createdTime=Sat Oct 17 01:28:51 CST 2020, time=2020-10-17, status=1, ipAttribution=)]
    2020-10-18 zhishijing
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    2020-10-18 lixiaol
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    2020-10-17 Nebula-Qin

    学习了

    0

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