Gut:Meta分析揭示结直肠癌相关遗传变异位点

2014-02-24 佚名 转化医学网

尽管结直肠癌的发病机制尚未完全阐明,但病因学研究显示,绝大部分结直肠癌的发生是一个多步骤、多阶段、环境因素和遗传因素共同作用的复杂过程。其中环境因素是结直肠癌发生的始动因素,而遗传特征则决定了个体对结直肠癌的易感性。结肠直肠癌发病风险与遗传因素密切相关。大约75%的结直肠癌属于散发,另有25%有结直肠癌家族史。过去20年,约有1000多项研究报道了结直肠癌与基因变异之间的关系,但结果却莫衷一是。我

尽管结直肠癌的发病机制尚未完全阐明,但病因学研究显示,绝大部分结直肠癌的发生是一个多步骤、多阶段、环境因素和遗传因素共同作用的复杂过程。其中环境因素是结直肠癌发生的始动因素,而遗传特征则决定了个体对结直肠癌的易感性。

结肠直肠癌发病风险与遗传因素密切相关。大约75%的结直肠癌属于散发,另有25%有结直肠癌家族史。过去20年,约有1000多项研究报道了结直肠癌与基因变异之间的关系,但结果却莫衷一是。我国第三军医大学马翔宇等通过系统评价先前的研究结果,对当前所了解的结直肠癌遗传因素进行了总结,结果在线发表于2013年8月的Gut杂志上。

研究搜索了PubMed和Google学术中2012年12月25日之前发表的有关结直肠癌与遗传变异相关性的论文,对其中910篇论文进行了Meta分析,共涉及150个候选基因中的267个遗传变异体的。使用威尼斯标准和假阳性报告率评价其结直肠癌风险相关的累积流行病学证据等级。

结果发现,共有62个变异体与结肠直肠癌风险显著相关。结直肠癌风险相关的累积流行病学证据分为三个等级:5个基因(APC、 CHEK2、DNMT3B、MLH1和MUTYH)中有8个变异体属于强度 ;2个基因中的2个变异体属于中度;45个基因中的52个变异体属于低度。另外,在至少包括5000例病例研究和5000例病例对照研究的meta分析中发现,33个基因中的40个变异体与结直肠癌风险不相关。

研究结果表明,在与候选基因相关的遗传变异体中,大约有4%的遗传变异体显示出与结直肠癌风险相关的中至强度累积流行病学证据。如果这些遗传变异体的研究结果可靠,将可解释大约5%的家族遗传性结直肠癌风险。进一步研究这些突变基因,能够帮助我们更好地确定结直肠癌的高危人群。

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    2014-07-28 guojianrong
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    2014-09-20 一闲
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    2014-08-10 DD2012

    以后完善

    0

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  8. [GetPortalCommentsPageByObjectIdResponse(id=1887381, encodeId=8806188e3810d, content=<a href='/topic/show?id=d56611584ec' target=_blank style='color:#2F92EE;'>#Meta#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=32, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=11584, encryptionId=d56611584ec, topicName=Meta)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=d8f4110, createdName=guojianrong, createdTime=Mon Jul 28 06:25:00 CST 2014, time=2014-07-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1895710, encodeId=2fe01895e10b4, content=<a href='/topic/show?id=4a391158248' target=_blank style='color:#2F92EE;'>#MET#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=26, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=11582, encryptionId=4a391158248, topicName=MET)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=18fc139, createdName=一闲, createdTime=Sat Sep 20 04:25:00 CST 2014, time=2014-09-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=11033, encodeId=c0c9110333d, content=以后完善, beContent=null, objectType=article, channel=null, level=null, likeNumber=93, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=766d107293, createdName=DD2012, createdTime=Sun Aug 10 21:56:00 CST 2014, time=2014-08-10, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1716257, encodeId=d83f1e16257ca, content=<a href='/topic/show?id=3bcd3810427' target=_blank style='color:#2F92EE;'>#变异位点#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=25, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=38104, encryptionId=3bcd3810427, topicName=变异位点)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=27df32174202, createdName=ymljack, createdTime=Fri Mar 28 23:25:00 CST 2014, time=2014-03-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1342294, encodeId=6cc0134229415, content=<a href='/topic/show?id=34cb381023e' target=_blank style='color:#2F92EE;'>#变异#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=20, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=38102, encryptionId=34cb381023e, topicName=变异)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=78c32500188, createdName=12498dabm77暂无昵称, createdTime=Wed Feb 26 05:25:00 CST 2014, time=2014-02-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1377166, encodeId=e6dd13e7166f8, content=<a href='/topic/show?id=007d9506920' target=_blank style='color:#2F92EE;'>#遗传变异#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=32, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=95069, encryptionId=007d9506920, topicName=遗传变异)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=73a3403, createdName=weihongyv, createdTime=Wed Feb 26 05:25:00 CST 2014, time=2014-02-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1452666, encodeId=e70f1452666a2, content=<a href='/topic/show?id=098ee8679ad' target=_blank style='color:#2F92EE;'>#结直肠#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=78679, encryptionId=098ee8679ad, topicName=结直肠)], attachment=null, authenticateStatus=null, createdAvatar=/v1.0.0/img/user_icon.png, createdBy=9ace5575596, createdName=crystal0564, createdTime=Wed Feb 26 05:25:00 CST 2014, time=2014-02-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=7788, encodeId=0d38e78869, content=但还有具体实验进行证实才可行, beContent=null, objectType=article, channel=null, level=null, likeNumber=62, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=116.226.55.67, createdTime=Tue Feb 25 09:40:00 CST 2014, time=2014-02-25, status=1, ipAttribution=)]
    2014-02-25 116.226.55.67

    但还有具体实验进行证实才可行

    0

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Lancet Oncol:Ⅱ期高危结肠癌辅助化疗 miRNA能否说了算?

约20%~25%的Ⅱ期结肠癌患者因术后疾病复发导致死亡,依据患者分期和临床特征并不能准确地预测其术后复发风险和辅助化疗的获益。中山大学中山医学院宋武等11月13日在线发表于《柳叶刀·肿瘤学》(Lancet Oncol)的研究显示,对于Ⅱ期结肠癌患者,基于6个miRNA的分层模型较临床病理危险因素和错配修复状态有更好的预后预测价值,且高危患者更能从辅助化疗中获益。 研究者首先

Gut:血浆甲基化SEPT9 DNA可助筛查无症状结直肠癌

结直肠癌是临床较为常见的恶性肿瘤,发病率呈逐年上升趋势。腺瘤是直肠癌形成之前的一个阶段,从腺瘤发展到癌一般要经历5-15年或更长,这就为结直肠癌的筛查和早诊早治提供了可能。故推广简单、快速、灵敏的早期检测方法是控制结直肠癌病死率的一个行之有效的方法。 【原文下载】 目前用于结直肠癌筛查的主要方法有粪便隐血试验和结直肠镜检查,但各有缺点限制了其广泛应用。血液学

ASCO发布结直肠癌随访监测指南

近日,美国临床肿瘤学会审核、认可了安大略癌症治疗(CCO)指南中结直肠癌患者后续随访、监测预案和二级预防的方法学的严谨性。美国临床肿瘤学会专家组同意、认可了CCO指南,并发表了声明。 指南主要推荐内容:我们应该根据复发风险和患者的功能状态(最初的2-4年非常重要)来指导临床监测。 病史采集、体格检查和癌胚抗原检查应每3-6个月进行一次,并连续监测5年。复发危险性

JAMA:常规CEA和CT联合检查结直肠癌复发无优势

研究要点: 1、常规CEA 和 CT随访3至5年检查结直肠癌复发; 2、CEA与CT联合检查无优势。即使某一种检查方案有生存优势,效果也非常有限。 结直肠癌术后强化随访是常见临床实践之一,但其证据基础还很缺乏。本研究旨在评估血液癌胚抗原 (CEA)常规检测和CT随访检查结直肠癌根治术后复发率的有效性。【原文下载】 各随机分组诊断至复发的时间间隔 该项随机临

Ann Surg:延长血栓预防可降低结直肠癌腹腔镜手术患者血栓风险

研究要点: 1.本研究对比考察了结直肠癌腹腔镜手术患者1周或4周抗血栓预防的疗效与安全性; 2.研究主要结局为术后28 ± 2天后,通过全身及超声检测发现的静脉血栓综合结果; 3.该研究表明,结直肠癌腹腔镜手术后,延长预防治疗可安全降低静脉血栓风险。 业已证明,肿瘤患者进行开腹手术后,将抗血栓预防治疗期延长超过1周可降低静脉血栓(VTE)发生率。在2013年11月18日在线出版的《外科学年