Nat Commun:我国科学家发现人乳头瘤病毒促进宫颈癌的机制!

2018-11-05 ipsvirus 病毒学界

最近研究报道HPV16的E7是更有说服力的致癌启动子。但E7蛋白造成宫颈癌的新机制和人乳头瘤病毒怎样控制细胞内活性氧水平仍有待发现。

宫颈癌是女性的第三大癌症,每年全球有528,000例新增病例和266,000例死亡。约95%的病例是由高危型人乳头瘤病毒感染引起的。E6和E7,两个病毒的早期基因,被认为在致癌作用上起关键作用,通过调节与细胞变形有关的信号通路。最近研究报道HPV16的E7是更有说服力的致癌启动子。但E7蛋白造成宫颈癌的新机制和人乳头瘤病毒怎样控制细胞内活性氧水平仍有待发现。

本研究表明乳酸脱氢酶A(LDHA)更适宜位于HPV16阳性的宫颈肿瘤的核心,由于E7诱导的细胞内活性氧(ROS)积累。令人吃惊的是,LDHA获得一个非经典的酶活性以制造α-羟基丁酸,并引起DOT1L(disruptor of telomeric silencing 1-like)调节的组蛋白H3K79 过度甲基化,导致抗氧化反应的激活及Wnt信号通路。而且,HPV16的E7的敲除降低了LDHA的核移位及H3K79 转基因小鼠模型K14-HPV16 上的三甲基化作用。HPV16的E7水平是明显与LDHA及H3K79在宫颈癌的三甲基化作用呈正相关。

总之,研究揭示了LDHA用以表观遗传地控制细胞的氧化还原反应和促进HPV导致的宫颈癌进展的细胞增殖的一种非经典的酶活性。


图1 ROS干扰LDHA四聚体形成及促进非经典酶活性

原始出处:Yuan Liu, Ji-Zheng Guo, Ying Liu, et al. Nuclear lactate dehydrogenase A senses ROS to produce α-hydroxybutyrate for HPV-induced cervical tumor growth. Nat Commun. 24 October 2018

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    2018-12-11 liye789132251
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    2019-07-12 liuli5079
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    2018-11-07 一闲
  5. [GetPortalCommentsPageByObjectIdResponse(id=1883404, encodeId=db11188340464, content=<a href='/topic/show?id=3b2112532d8' target=_blank style='color:#2F92EE;'>#Nat#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=21, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=12532, encryptionId=3b2112532d8, topicName=Nat)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2e6f107, createdName=liye789132251, createdTime=Tue Dec 11 06:50:00 CST 2018, time=2018-12-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1802577, encodeId=d94a18025e761, content=<a href='/topic/show?id=acfae485578' target=_blank style='color:#2F92EE;'>#科学家发现#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=36, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=74855, encryptionId=acfae485578, topicName=科学家发现)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=e572480, createdName=旅苦化文_208, createdTime=Sun Jun 16 16:50:00 CST 2019, time=2019-06-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2087454, encodeId=031c208e454f2, content=<a href='/topic/show?id=490750196b' target=_blank style='color:#2F92EE;'>#COMMUN#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=24, 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 Jul 12 01:50:00 CST 2019, time=2019-07-12, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1408152, encodeId=e73e140815289, content=<a href='/topic/show?id=92194628826' target=_blank style='color:#2F92EE;'>#宫颈#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=34, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=46288, encryptionId=92194628826, topicName=宫颈)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=11102737131, createdName=一闲, createdTime=Wed Nov 07 12:50:00 CST 2018, time=2018-11-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1443487, encodeId=5026144348ed1, content=<a href='/topic/show?id=4a65246327c' target=_blank style='color:#2F92EE;'>#人乳头瘤病毒#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=36, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=24632, encryptionId=4a65246327c, topicName=人乳头瘤病毒)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=5fb15077773, createdName=ms3297076796458174, createdTime=Wed Nov 07 12:50:00 CST 2018, time=2018-11-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=351810, encodeId=2d8735181096, content=学习一下,谢谢, beContent=null, objectType=article, channel=null, level=null, likeNumber=48, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/nmoH3FVKe8KYYzm5OrpnZastaKg0jKDyvlVBp8RUZUBgynaVPQ86l6DbaqohIM3eIsowIy6V53q5n5mYuyzD6w/132, createdBy=aac72353870, createdName=122b87b4m49(暂无昵称), createdTime=Wed Nov 07 10:15:00 CST 2018, time=2018-11-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=351706, encodeId=d0db351e06bb, content=学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=61, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=1bb241978, createdName=phoebeyan520, createdTime=Tue Nov 06 09:03:54 CST 2018, time=2018-11-06, status=1, ipAttribution=)]
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    2018-11-07 122b87b4m49(暂无昵称)

    学习一下,谢谢

    0

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    2018-11-06 phoebeyan520

    学习了

    0

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