AJG: 吸烟和结直肠癌的发生风险:一项荟萃分析

2020-12-27 MedSci原创 MedSci原创

结直肠癌(CRC)是全世界最常见的癌症类型之一,2018年全球新增CRC病例超过180万,死亡超过80万。

      结直肠癌(CRC)是全世界最常见的癌症类型之一,2018年全球新增CRC病例超过180万,死亡超过80万。通过积极进行CRC筛查并遵循良好的生活方式,特别是通过锻炼身体,减少过多的体内脂肪并避免吸烟,避免烟酒,酒精饮料和富含红色的饮食,可以大大降低CRC的风险。

 

      吸烟在CRC风险中的作用还不清楚,直到在2009年,国际癌症研究机构才确定了吸烟的致癌性与CRC风险之间的联系。尽管吸烟会大大增加许多器官(包括肺,口腔,咽,食道,膀胱,肾脏,子宫颈和胰腺)的癌症风险,但先前的估计表明,吸烟对CRC风险的影响很小,患癌风险增加了15 %–20%。尽管早期研究认为CRC是一种单一疾病,但近年来,已定义了不同的分子亚型,其特征在于包括BRAF和KRAS在内的不同驱动程序突变并通过表观遗传修饰,包括高甲基化。关于吸烟如何影响CRC风险以及是否选择性影响CRC特定亚型的风险知之甚少。

 

      本项研究旨在根据肿瘤特征(例如结肠直肠内的部位)和CRC分子特征计算风险估算,以及研究关于吸烟与CRC风险之间关联的分子机制。

 

 

      研究人员对2018年9月前的吸烟与CRC风险之间的关系进行了流行病学研究的系统回顾和荟萃分析。根据吸烟状况,强度,持续时间,包装年限和年龄,计算了CRC的相对风险(RR),重点关注CRC的分子亚型与吸烟的影响。

 

 

      本项荟萃分析总结了188项原始研究的证据。与从未吸烟者相比,当前吸烟者的CRC的风险为1.14(95%置信区间[CI] 1.10-1.18),以前吸烟者为1.17(95%CI 1.15-1.20)。CRC风险随吸烟强度和持续时间线性增加。与目前的吸烟者相比,已经戒烟超过25年的前吸烟者患CRC的风险显着降低。吸烟与CRC风险密切相关,其特征在于高CpG岛甲基化子表型(RR 1.42; 95%CI 1.20-1.67),BRAF突变(RR 1.63; 95%CI 1.23–2.16),或微卫星高度不稳定性(RR 1.56; 95%CI 1.32–1.85),但KRAS表型CRC与吸烟(RR 1.04; 95%CI 0.90-1.20; n = 5)或TP53(RR 1.13; 95%CI 0.99-1.29; n = 5)突变无关。

 

      本项研究证实吸烟以强度和持续时间的剂量依赖性方式增加患CRC的风险,而戒烟降低了CRC的风险。吸烟极大地增加了通过微卫星不稳定性途径发展为CRC的风险,其特征为微卫星不稳定性高,CpG岛甲基化子表型阳性和BRAF突变。

 

 

原始出处:

Botteri, Edoardo. Et al. Smoking and Colorectal Cancer Risk, Overall and by Molecular Subtypes: A Meta-Analysis. The American Journal of Gastroenterology.2020.

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    2021-10-25 minzju5052
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    2021-03-08 venlin
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    2020-12-29 Jessica

    吸烟百害而无一利!

    0

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  6. [GetPortalCommentsPageByObjectIdResponse(id=1836962, encodeId=8c28183696226, content=<a href='/topic/show?id=1f188e230c5' target=_blank style='color:#2F92EE;'>#荟萃分析#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=27, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=87230, encryptionId=1f188e230c5, topicName=荟萃分析)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=b79433, createdName=fangcong, createdTime=Sat Feb 06 23:57:39 CST 2021, time=2021-02-06, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2057319, encodeId=6003205e31966, content=<a href='/topic/show?id=18982222db' target=_blank style='color:#2F92EE;'>#AJG#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=35, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=2222, encryptionId=18982222db, topicName=AJG)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2978132, createdName=minzju5052, createdTime=Mon Oct 25 08:57:39 CST 2021, time=2021-10-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1681403, encodeId=74db168140346, content=<a href='/topic/show?id=366b8e2299e' target=_blank style='color:#2F92EE;'>#荟萃#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=23, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=87229, encryptionId=366b8e2299e, topicName=荟萃)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=c12d27855367, createdName=venlin, createdTime=Mon Mar 08 19:57:39 CST 2021, time=2021-03-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=911853, encodeId=b5e291185381, content=吸烟百害而无一利!, beContent=null, objectType=article, channel=null, level=null, likeNumber=79, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20211019/df01a4bfb64246379ddfef3370d04115/e1274c8eb5e440918f56f83bcfea9031.jpg, createdBy=3a345397082, createdName=Jessica, createdTime=Tue Dec 29 10:15:22 CST 2020, time=2020-12-29, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1453449, encodeId=aefe1453449bb, 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=38, 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=Tue Dec 29 06:57:39 CST 2020, time=2020-12-29, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=911595, encodeId=ff5291159514, content=学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=73, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://cdnapi.center.medsci.cn/medsci/head/2017/09/08/19ec4df708d961ceb52f7d1cbfd1cab4.jpg, createdBy=78921723802, createdName=残风横吹秋夜雨, createdTime=Mon Dec 28 13:08:45 CST 2020, time=2020-12-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=911550, encodeId=f85d9115502a, content=学习, beContent=null, objectType=article, channel=null, level=null, likeNumber=78, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=7b245183802, createdName=14701227m79暂无昵称, createdTime=Mon Dec 28 10:02:36 CST 2020, time=2020-12-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=911293, encodeId=66db9112930b, content=吸烟和各种肿瘤都有相关性, beContent=null, objectType=article, channel=null, level=null, likeNumber=72, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=/v1.0.0/img/user_icon.png, createdBy=a37a1710612, createdName=oo902, createdTime=Sun Dec 27 19:04:59 CST 2020, time=2020-12-27, status=1, ipAttribution=)]
    2020-12-28 残风横吹秋夜雨

    学习了

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    2020-12-28 14701227m79暂无昵称

    学习

    0

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    2020-12-27 oo902

    吸烟和各种肿瘤都有相关性

    0

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