PLoS ONE:烟草烟雾引发癌症再添新证据

2016-10-21 佚名 生物谷

近日,刊登在国际杂志PLoS ONE上的一项研究报告中,来自肯塔基大学的研究人员通过研究阐明了一种新方法,即烟草烟雾能够促进肺癌的发生,研究者发现,烟草烟雾或许能够抑制DNA的核苷酸切除修复(NER)过程,从而导致肺癌的发生。烟草烟雾中的很多成分都是能够损伤DNA的致癌物,这种损伤能够被DNA修复过程所移除从而就能够抑制机体遗传性突变的产生,诸如核苷酸切除修复等DNA修复过程对于阻断诱发肺癌发生的

近日,刊登在国际杂志PLoS ONE上的一项研究报告中,来自肯塔基大学的研究人员通过研究阐明了一种新方法,即烟草烟雾能够促进肺癌的发生,研究者发现,烟草烟雾或许能够抑制DNA的核苷酸切除修复(NER)过程,从而导致肺癌的发生。

烟草烟雾中的很多成分都是能够损伤DNA的致癌物,这种损伤能够被DNA修复过程所移除从而就能够抑制机体遗传性突变的产生,诸如核苷酸切除修复等DNA修复过程对于阻断诱发肺癌发生的DNA突变的积累非常重要;研究者Isabel Mellon教授表示,如今很多人都知道烟草中的致癌物能够引发产生突变,但相对而言很少有研究者调查烟草烟雾对DNA修复通路的影响。

本文中研究者就在培养的人类肺部细胞中检测了香烟烟雾冷凝液对核苷酸切除修复功能的应先,香烟烟雾冷凝液是烟草烟雾的常用替代品;研究者发现,将肺部细胞暴露于香烟烟雾冷凝液中就能够明显降低核苷酸切除修复的效应,此外,香烟烟雾冷凝液的暴露也会刺激名为XPC的核苷酸切除修复关键蛋白发生破坏,XPC蛋白水平的降低或许就能够帮助解释为何香烟烟雾冷凝液能够抑制核苷酸的切除修复过程。

研究者发现,烟草烟雾对DNA的完整性有双倍的效应,其不仅能够损伤DNA,还会抑制机体修复DNA损伤的关键过程;Mellon解释道,核苷酸切除修复蛋白的抑制很有可能会增加突变和癌症的发生率,尤其是慢性DNA损伤的诱导,这种情况经常发生在吸烟者的肺部组织中。如果的确是这种情况的话,既定患者肺部细胞进行损伤DNA修复的能力或许就能够预测个体因烟草烟雾暴露而患肺癌的风险。

最后研究者表示,未来研究中我们希望能够通过更为深入的研究来确定核苷酸切除修复的效应为何在不同人群中表现不一样,而且我们还会一直评估环境因子的暴露为何会负面影响个体机体中的DNA修复效应,以及是否遗传或环境因子能够降低DNA的修复机制,从而增加个体患癌的风险。

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    2016-10-26 忠诚向上

    好好学习

    0

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    2016-10-23 刘煜

    谢谢分享,学习了。

    0

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    2016-10-23 mnda
  5. [GetPortalCommentsPageByObjectIdResponse(id=1789845, encodeId=b4e21e8984562, content=<a href='/topic/show?id=6e4814388e2' target=_blank style='color:#2F92EE;'>#Plos one#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=24, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=14388, encryptionId=6e4814388e2, topicName=Plos one)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=fda6311, createdName=119337457, createdTime=Mon Aug 28 17:39:00 CST 2017, time=2017-08-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=151247, encodeId=b50815124e4c, content=好好学习, beContent=null, objectType=article, channel=null, level=null, likeNumber=67, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=45101626056, createdName=忠诚向上, createdTime=Wed Oct 26 06:47:33 CST 2016, time=2016-10-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=150493, encodeId=ac7615049308, content=谢谢分享,学习了。, beContent=null, objectType=article, channel=null, level=null, likeNumber=60, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cdnapi.center.medsci.cn/medsci/head/2017/04/21/72142930668371951a41ef4ea4b233e6.jpg, createdBy=dcbc1715228, createdName=刘煜, createdTime=Sun Oct 23 07:18:20 CST 2016, time=2016-10-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1310181, encodeId=206e131018115, content=<a href='/topic/show?id=53036e11185' target=_blank style='color:#2F92EE;'>#烟草#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=67111, encryptionId=53036e11185, topicName=烟草)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=6a8d381, createdName=mnda, createdTime=Sun Oct 23 06:39:00 CST 2016, time=2016-10-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=150304, encodeId=bc811503049e, content=戒烟,公共场合禁烟, beContent=null, objectType=article, channel=null, level=null, likeNumber=55, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=445f1740270, createdName=meiliwuxian, createdTime=Sat Oct 22 11:10:26 CST 2016, time=2016-10-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=150303, encodeId=98cd150303e4, content=减少二手烟, beContent=null, objectType=article, channel=null, level=null, likeNumber=57, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=cb571956164, createdName=187清风, createdTime=Sat Oct 22 11:09:35 CST 2016, time=2016-10-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=150218, encodeId=5afa150218e7, content=日常方面的研究,平素不问注意, beContent=null, objectType=article, channel=null, level=null, likeNumber=51, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20160601/IMG574E13FEE55F33222.jpg, createdBy=929c1478678, createdName=zibozhouping, createdTime=Sat Oct 22 05:51:40 CST 2016, time=2016-10-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=150194, encodeId=5ec115019420, content=又添新证, beContent=null, objectType=article, channel=null, level=null, likeNumber=30, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20161012/IMG57FE37B9D8B7C2781.jpg, createdBy=05f31956923, createdName=1e128d2fm65(暂无匿称), createdTime=Fri Oct 21 22:18:23 CST 2016, time=2016-10-21, status=1, ipAttribution=)]
    2016-10-22 meiliwuxian

    戒烟,公共场合禁烟

    0

  6. [GetPortalCommentsPageByObjectIdResponse(id=1789845, encodeId=b4e21e8984562, content=<a href='/topic/show?id=6e4814388e2' target=_blank style='color:#2F92EE;'>#Plos one#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=24, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=14388, encryptionId=6e4814388e2, topicName=Plos one)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=fda6311, createdName=119337457, createdTime=Mon Aug 28 17:39:00 CST 2017, time=2017-08-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=151247, encodeId=b50815124e4c, content=好好学习, beContent=null, objectType=article, channel=null, level=null, likeNumber=67, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=45101626056, createdName=忠诚向上, createdTime=Wed Oct 26 06:47:33 CST 2016, time=2016-10-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=150493, encodeId=ac7615049308, content=谢谢分享,学习了。, beContent=null, objectType=article, channel=null, level=null, likeNumber=60, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cdnapi.center.medsci.cn/medsci/head/2017/04/21/72142930668371951a41ef4ea4b233e6.jpg, createdBy=dcbc1715228, createdName=刘煜, createdTime=Sun Oct 23 07:18:20 CST 2016, time=2016-10-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1310181, encodeId=206e131018115, content=<a href='/topic/show?id=53036e11185' target=_blank style='color:#2F92EE;'>#烟草#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=67111, encryptionId=53036e11185, topicName=烟草)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=6a8d381, createdName=mnda, createdTime=Sun Oct 23 06:39:00 CST 2016, time=2016-10-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=150304, encodeId=bc811503049e, content=戒烟,公共场合禁烟, beContent=null, objectType=article, channel=null, level=null, likeNumber=55, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=445f1740270, createdName=meiliwuxian, createdTime=Sat Oct 22 11:10:26 CST 2016, time=2016-10-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=150303, encodeId=98cd150303e4, content=减少二手烟, beContent=null, objectType=article, channel=null, level=null, likeNumber=57, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=cb571956164, createdName=187清风, createdTime=Sat Oct 22 11:09:35 CST 2016, time=2016-10-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=150218, encodeId=5afa150218e7, content=日常方面的研究,平素不问注意, beContent=null, objectType=article, channel=null, level=null, likeNumber=51, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20160601/IMG574E13FEE55F33222.jpg, createdBy=929c1478678, createdName=zibozhouping, createdTime=Sat Oct 22 05:51:40 CST 2016, time=2016-10-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=150194, encodeId=5ec115019420, content=又添新证, beContent=null, objectType=article, channel=null, level=null, likeNumber=30, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20161012/IMG57FE37B9D8B7C2781.jpg, createdBy=05f31956923, createdName=1e128d2fm65(暂无匿称), createdTime=Fri Oct 21 22:18:23 CST 2016, time=2016-10-21, status=1, ipAttribution=)]
    2016-10-22 187清风

    减少二手烟

    0

  7. [GetPortalCommentsPageByObjectIdResponse(id=1789845, encodeId=b4e21e8984562, content=<a href='/topic/show?id=6e4814388e2' target=_blank style='color:#2F92EE;'>#Plos one#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=24, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=14388, encryptionId=6e4814388e2, topicName=Plos one)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=fda6311, createdName=119337457, createdTime=Mon Aug 28 17:39:00 CST 2017, time=2017-08-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=151247, encodeId=b50815124e4c, content=好好学习, beContent=null, objectType=article, channel=null, level=null, likeNumber=67, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=45101626056, createdName=忠诚向上, createdTime=Wed Oct 26 06:47:33 CST 2016, time=2016-10-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=150493, encodeId=ac7615049308, content=谢谢分享,学习了。, beContent=null, objectType=article, channel=null, level=null, likeNumber=60, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cdnapi.center.medsci.cn/medsci/head/2017/04/21/72142930668371951a41ef4ea4b233e6.jpg, createdBy=dcbc1715228, createdName=刘煜, createdTime=Sun Oct 23 07:18:20 CST 2016, time=2016-10-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1310181, encodeId=206e131018115, content=<a href='/topic/show?id=53036e11185' target=_blank style='color:#2F92EE;'>#烟草#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=67111, encryptionId=53036e11185, topicName=烟草)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=6a8d381, createdName=mnda, createdTime=Sun Oct 23 06:39:00 CST 2016, time=2016-10-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=150304, encodeId=bc811503049e, content=戒烟,公共场合禁烟, beContent=null, objectType=article, channel=null, level=null, likeNumber=55, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=445f1740270, createdName=meiliwuxian, createdTime=Sat Oct 22 11:10:26 CST 2016, time=2016-10-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=150303, encodeId=98cd150303e4, content=减少二手烟, beContent=null, objectType=article, channel=null, level=null, likeNumber=57, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=cb571956164, createdName=187清风, createdTime=Sat Oct 22 11:09:35 CST 2016, time=2016-10-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=150218, encodeId=5afa150218e7, content=日常方面的研究,平素不问注意, beContent=null, objectType=article, channel=null, level=null, likeNumber=51, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20160601/IMG574E13FEE55F33222.jpg, createdBy=929c1478678, createdName=zibozhouping, createdTime=Sat Oct 22 05:51:40 CST 2016, time=2016-10-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=150194, encodeId=5ec115019420, content=又添新证, beContent=null, objectType=article, channel=null, level=null, likeNumber=30, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20161012/IMG57FE37B9D8B7C2781.jpg, createdBy=05f31956923, createdName=1e128d2fm65(暂无匿称), createdTime=Fri Oct 21 22:18:23 CST 2016, time=2016-10-21, status=1, ipAttribution=)]
    2016-10-22 zibozhouping

    日常方面的研究,平素不问注意

    0

  8. [GetPortalCommentsPageByObjectIdResponse(id=1789845, encodeId=b4e21e8984562, content=<a href='/topic/show?id=6e4814388e2' target=_blank style='color:#2F92EE;'>#Plos one#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=24, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=14388, encryptionId=6e4814388e2, topicName=Plos one)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=fda6311, createdName=119337457, createdTime=Mon Aug 28 17:39:00 CST 2017, time=2017-08-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=151247, encodeId=b50815124e4c, content=好好学习, beContent=null, objectType=article, channel=null, level=null, likeNumber=67, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=45101626056, createdName=忠诚向上, createdTime=Wed Oct 26 06:47:33 CST 2016, time=2016-10-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=150493, encodeId=ac7615049308, content=谢谢分享,学习了。, beContent=null, objectType=article, channel=null, level=null, likeNumber=60, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cdnapi.center.medsci.cn/medsci/head/2017/04/21/72142930668371951a41ef4ea4b233e6.jpg, createdBy=dcbc1715228, createdName=刘煜, createdTime=Sun Oct 23 07:18:20 CST 2016, time=2016-10-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1310181, encodeId=206e131018115, content=<a href='/topic/show?id=53036e11185' target=_blank style='color:#2F92EE;'>#烟草#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=67111, encryptionId=53036e11185, topicName=烟草)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=6a8d381, createdName=mnda, createdTime=Sun Oct 23 06:39:00 CST 2016, time=2016-10-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=150304, encodeId=bc811503049e, content=戒烟,公共场合禁烟, beContent=null, objectType=article, channel=null, level=null, likeNumber=55, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=445f1740270, createdName=meiliwuxian, createdTime=Sat Oct 22 11:10:26 CST 2016, time=2016-10-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=150303, encodeId=98cd150303e4, content=减少二手烟, beContent=null, objectType=article, channel=null, level=null, likeNumber=57, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=cb571956164, createdName=187清风, createdTime=Sat Oct 22 11:09:35 CST 2016, time=2016-10-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=150218, encodeId=5afa150218e7, content=日常方面的研究,平素不问注意, beContent=null, objectType=article, channel=null, level=null, likeNumber=51, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20160601/IMG574E13FEE55F33222.jpg, createdBy=929c1478678, createdName=zibozhouping, createdTime=Sat Oct 22 05:51:40 CST 2016, time=2016-10-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=150194, encodeId=5ec115019420, content=又添新证, beContent=null, objectType=article, channel=null, level=null, likeNumber=30, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20161012/IMG57FE37B9D8B7C2781.jpg, createdBy=05f31956923, createdName=1e128d2fm65(暂无匿称), createdTime=Fri Oct 21 22:18:23 CST 2016, time=2016-10-21, status=1, ipAttribution=)]
    2016-10-21 1e128d2fm65(暂无匿称)

    又添新证

    0

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最近,研究人员发现吸烟能以DNA甲基化形式在人体基因组中留下“足迹”。一项发表在权威心血管遗传学学术期刊《Circulation: Cardiovascular Genetics》上的新研究表明:DNA甲基化可能成为揭示个人吸烟史的重要标志,并可能提供提供潜在的疾病治疗方案。▲吸烟能影响健康长达30年?(图片来源:哈佛大学)美国国立卫生研究院下属环境健康科学研究所的流行病学处副处长Stephani

Oncogene:烟草化合物诱导氧化应激促进肿瘤发展

上海交通大学基础医学院生化与分子细胞生物学系易静研究组在一项研究中,揭示了烟草化合物诱导氧化应激促进肿瘤发生和发展的原因。相关成果日前发表于《癌基因》杂志。头颈部癌是一类原发于头颈部的恶性肿瘤,在发生前往往存在长期的局部慢性炎症。头颈部癌与吸烟有明显关联。研究认为,吸烟诱发癌变和促进癌症发展的原因在于烟草成分损伤DNA并带来基因突变。此次研究人员发现,在有烟草化合物NNK存在时,细胞发生氧化应激,