NEURO-ONCOLOGY:室管膜瘤侵略性差异背后的原因

2017-07-26 海北 MedSci原创

在儿童中枢神经系统肿瘤中,室管膜瘤约占10%。尽管临床上可以做到肿瘤的全部切除,但是切除后该肿瘤的复发率还是很高。最近,室管膜瘤在分子水平的亚组分类已经建立起来,但是至今为止,关于某些亚型侵略性的机制依然不太清楚。

儿童中枢神经系统肿瘤中,室管膜瘤约占10%。尽管临床上可以做到肿瘤的全部切除,但是切除后该肿瘤的复发率还是很高。最近,室管膜瘤在分子水平的亚组分类已经建立起来,但是至今为止,关于某些亚型侵略性的机制依然不太清楚。

来自维也纳医科大学的研究人员探究了端粒酶再激活在儿科室管膜瘤中的临床和生物学作用。端粒酶再激活是癌细胞逃避细胞衰老的常见机制。在一个儿科颅内室管膜瘤群组中,研究人员测定了端粒酶酶活性,人端粒酶逆转录酶mRNA的表达情况,启动子甲基化情况和位于人端粒酶逆转录酶启动子中rs2853669单核苷酸多态性情况。

研究结果显示,在后窝室管膜瘤组A(PF-EPN-A)中,端粒酶的活性变化很大,和患者的总体生存率差异之间存在着显著的相关性。而所有supratentorial RelA融合阳性(ST-EPN-RELA)室管膜瘤中,均存在端粒酶再活化。利用计算机分析甲基化模式,结果显示,在所有室管膜瘤亚型中,只有以上两个亚型携带高甲基化人端粒酶逆转录酶启动子。这从一定程度说明,端粒酶的再激活涉及表观遗传机制。此外,染色体1q增益是一个众所周知的阴性预后因子,它与PF-EPN-A中的端粒酶再活化密切相关。计算机分析结果也进一步验证了该联系,并发现E-twenty-six factor, Myc, and E2F靶向基因在染色体1q增益室管膜瘤中的富集。此外,染色体1q增益室管膜瘤中ETV3表达量升高,ETV3是位于染色体1q上的E-twenty-six factor靶向基因。

因此,研究人员的结果阐述了端粒酶重新激活对于儿科室管膜瘤疾病进展的影响,为进一步研究所涉及的分子机制提供了初步证据。


原始出处:

Gojo J et al. Telomerase activation in posterior fossa group A ependymomas is associated with dismal prognosis and chromosome 1q gain. Neuro Oncol. 2017 Mar 24. doi: 10.1093/neuonc/nox027. 


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    2017-10-14 pps20019
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    2018-05-13 heli0118
  5. [GetPortalCommentsPageByObjectIdResponse(id=1992292, encodeId=3744199229277, content=<a href='/topic/show?id=bb49269921a' target=_blank style='color:#2F92EE;'>#侵略性#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=0, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=26992, encryptionId=bb49269921a, topicName=侵略性)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c3ae503, createdName=pps20019, createdTime=Sat Oct 14 08:40:00 CST 2017, time=2017-10-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1674419, encodeId=655516e441937, content=<a href='/topic/show?id=e8aa13359b1' target=_blank style='color:#2F92EE;'>#Oncology#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=34, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=13359, encryptionId=e8aa13359b1, topicName=Oncology)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=cb7226973259, createdName=circumcision, createdTime=Sat Aug 05 01:40:00 CST 2017, time=2017-08-05, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1803885, encodeId=1f811803885e2, content=<a href='/topic/show?id=9260e60733b' target=_blank style='color:#2F92EE;'>#管膜瘤#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=39, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=76073, encryptionId=9260e60733b, topicName=管膜瘤)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=796422, createdName=lvliquan, createdTime=Sat Nov 04 14:40:00 CST 2017, time=2017-11-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1865041, encodeId=14df186504151, content=<a href='/topic/show?id=16ce133504e' target=_blank style='color:#2F92EE;'>#Oncol#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=13350, encryptionId=16ce133504e, topicName=Oncol)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=21015, createdName=heli0118, createdTime=Sun May 13 19:40:00 CST 2018, time=2018-05-13, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=227310, encodeId=6a1122e310d1, content=好办法,希望能治理好。, beContent=null, objectType=article, channel=null, level=null, likeNumber=58, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/mONcle9pic3zMoyicyo6ia9f4IuLQAwZoxD6Hx4ibd5CMcOCYhStY6oDibbKK6O2X8iaicldO5ib8j1iapOIobIKCGiczU2A/0, createdBy=56251941490, createdName=虈亣靌, createdTime=Fri Jul 28 19:03:52 CST 2017, time=2017-07-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1559625, encodeId=3a891559625f9, content=<a href='/topic/show?id=7df14623982' target=_blank style='color:#2F92EE;'>#室管膜瘤#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=28, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=46239, encryptionId=7df14623982, topicName=室管膜瘤)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=300d15003669, createdName=huiwelcome, createdTime=Fri Jul 28 11:40:00 CST 2017, time=2017-07-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1565634, encodeId=bd5a15656345a, content=<a href='/topic/show?id=7df14623982' target=_blank style='color:#2F92EE;'>#室管膜瘤#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=24, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=46239, encryptionId=7df14623982, topicName=室管膜瘤)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=300d15003669, createdName=huiwelcome, createdTime=Fri Jul 28 11:40:00 CST 2017, time=2017-07-28, status=1, ipAttribution=)]
    2017-07-28 虈亣靌

    好办法,希望能治理好。

    0

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