Gur:肝细胞癌进展的新机制!

2017-04-05 MedSci MedSci原创

染色体不稳定(CIN)是基因组不稳定的最常见形式,其通过增强肿瘤异质性、耐药性和免疫逃逸促进肝细胞癌(HCC)的进展。CIN本身是DNA损伤的重要因素,维持结构染色体异常,但其潜在的机制尚未可知。近期,一项发表在杂志GUT上的研究使用二乙基亚硝胺诱导的HCC动物模型评估了DNA损伤反应蛋白检查点激酶2(Chk2)的表达。Chk2同时也在两个人类肝癌样本队列中确定。为了评估Chk2的功能作用,通过使

染色体不稳定(CIN)是基因组不稳定的最常见形式,其通过增强肿瘤异质性、耐药性和免疫逃逸促进肝细胞癌(HCC)的进展。CIN本身是DNA损伤的重要因素,维持结构染色体异常,但其潜在的机制尚未可知。


近期,一项发表在杂志GUT上的研究使用二乙基亚硝胺诱导的HCC动物模型评估了DNA损伤反应蛋白检查点激酶2(Chk2)的表达。Chk2同时也在两个人类肝癌样本队列中确定。为了评估Chk2的功能作用,通过使用hTERT基因(HuS)永生化的HCT116,Huh7和人肝细胞进行增益和功能丧失、诱变、核型分析和免疫荧光/活体成像。

此项研究结果证明HCC肿瘤发生过程中的有丝分裂错误导致染色体/ DNA损伤和Chk2的激活。Chk2有丝分裂纺锤体内的过度表达/磷酸化和错位定位有助于诱导滞育染色体。Chk2的敲低可以逆转染色体滞后和有丝分裂活性。

此外,上调的Chk2维持与Aurora B激酶相互作用的有丝分裂活性,用于染色体凝聚和胞质分裂。Chk2的叉头相关结构域是Chk2对有丝分裂结构的错位定位所必需的。此外,视网膜母细胞瘤蛋白磷酸化有助于发生缺陷的有丝分裂。

此项研究结果揭示了Chk2在HCC进展中作用的新机理。这些研究结果提出Chk2作为HCC患者发生CIN的推定生物标志物,为患者的临床治疗管理提供了有价值的新理论。

原始出处:
Carloni V, Lulli M, et al. CHK2 overexpression and mislocalisation within mitotic structures enhances chromosomal instability and hepatocellular carcinoma progression. Gut. 2017 Mar 30. pii: gutjnl-2016-313114. doi: 10.1136/gutjnl-2016-313114. 

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    2017-06-05 xjy02
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    2017-04-09 春暖花开8785

    标志物的研究为临床疾病的诊断有很大帮助。

    0

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    2017-04-07 大爰

    新知识学习了!!

    0

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    2017-04-05 ylzr123

    不错的方式,努力学习,刻苦专研,不断总结出来新经验。

    0

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    2017-04-05 半夏微凉

    学习了谢谢分享!

    0

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    2017-04-05 年轻人的生活

    很好的文章,很喜欢

    0

  8. [GetPortalCommentsPageByObjectIdResponse(id=1863267, encodeId=b878186326e72, content=<a href='/topic/show?id=c0b68135561' target=_blank style='color:#2F92EE;'>#肝细胞#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=40, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=81355, encryptionId=c0b68135561, topicName=肝细胞)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=d59291, createdName=xjy02, createdTime=Mon Jun 05 01:00:00 CST 2017, time=2017-06-05, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1978488, encodeId=e0ce19e8488ef, content=<a href='/topic/show?id=3b90e79787f' target=_blank style='color:#2F92EE;'>#细胞癌#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=25, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=77978, encryptionId=3b90e79787f, topicName=细胞癌)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=e457184, createdName=qingting, createdTime=Mon Aug 14 13:00:00 CST 2017, time=2017-08-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=186199, encodeId=352b1861998e, content=标志物的研究为临床疾病的诊断有很大帮助。, beContent=null, objectType=article, channel=null, level=null, likeNumber=77, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/oLAjfB7s1ib06iaV3D9Tg5Kym1A9qicflExZYSdibSZBHDyicKZZj37w4jR44fPa9DI3mVLObHAxzntpTAbwxeHvviclcw8coNrDge/0, createdBy=6dc22001775, createdName=春暖花开8785, createdTime=Sun Apr 09 14:32:29 CST 2017, time=2017-04-09, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=185674, encodeId=84701856e4ab, content=新知识学习了!!, beContent=null, objectType=article, channel=null, level=null, likeNumber=78, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20200816/e4675a86ea694f12b82202b320dc2654/12f6b900498349e994ce8f516a584d6a.jpg, createdBy=09431951290, createdName=大爰, createdTime=Fri Apr 07 07:15:57 CST 2017, time=2017-04-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=185347, encodeId=7efc18534eee, content=不错的方式,努力学习,刻苦专研,不断总结出来新经验。, beContent=null, objectType=article, channel=null, level=null, likeNumber=75, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/NUyjXTCJjo7s7ZCKOmmbBTD6nE7gcd5OZpvyGEzkxBP3S275k5ZJVrsPkotZhBglRHM9rKvcj1OgkssqhcnoPw8zIaMZTF8c/0, createdBy=4c441942088, createdName=ylzr123, createdTime=Wed Apr 05 15:43:22 CST 2017, time=2017-04-05, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=185341, encodeId=4fee185341b7, content=学习了谢谢分享!, beContent=null, objectType=article, channel=null, level=null, likeNumber=70, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/NUyjXTCJjo5nmIH5IQqCKjJgSCuicPWUWOUcdqt1ROPnEiaOYN4pSHibDv8la3OxNLalvuvUXn8clpJlrpuyTpckgt9OPkeSSdT/0, createdBy=8fd71930726, createdName=半夏微凉, createdTime=Wed Apr 05 15:35:10 CST 2017, time=2017-04-05, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=185339, encodeId=e0351853396d, content=很好的文章,很喜欢, beContent=null, objectType=article, channel=null, level=null, likeNumber=72, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://cdnapi.center.medsci.cn/medsci/head/2018/06/19/e8854cfd15417d94951992a7fc2a6f51.jpg, createdBy=23161704275, createdName=年轻人的生活, createdTime=Wed Apr 05 15:10:25 CST 2017, time=2017-04-05, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=185320, encodeId=2df5185320cd, content=签到学习了很多, beContent=null, objectType=article, channel=null, level=null, likeNumber=36, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://q.qlogo.cn/qqapp/1103841572/A3E53E62691178E2F18D7B999FD22131/100, createdBy=f44d2003846, createdName=Chongyang Zhang, createdTime=Wed Apr 05 13:39:44 CST 2017, time=2017-04-05, status=1, ipAttribution=)]
    2017-04-05 Chongyang Zhang

    签到学习了很多

    0

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