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Nature:饮酒和吸烟是食管癌的关键风险因子

2019-01-03 Nature自然科研 Nature自然科研

根据本周《自然》在线发表的一篇论文,癌症突变会发生在生理学特征正常的食管细胞内,并会随着时间推移而积聚。包括饮酒和吸烟在内的风险因子会促使突变细胞数量增加,这证实了这些环境因子对于食管癌发展的重要影响。

根据本周《自然》在线发表的一篇论文,癌症突变会发生在生理学特征正常的食管细胞内,并会随着时间推移而积聚。包括饮酒和吸烟在内的风险因子会促使突变细胞数量增加,这证实了这些环境因子对于食管癌发展的重要影响。

食管鳞状细胞癌(ESCC)是一种在亚洲人口中最为常见的食管癌类型。最新研究表明,癌前克隆细胞会在生理正常的组织内出现,但是这些细胞与已经确认的ESCC风险因子(如年龄、饮酒和吸烟)之间的关系却不甚明了。

日本京都大学的小川誠司及同事检测了139名患者(诊断为ESCC或无癌)的食管组织样本以调查细胞突变。患者的饮酒和吸烟史也被记录下来。作者报告表示,许多样本中包含产生了突变的克隆细胞,尤其是癌相关基因NOTCH1的突变,而且此类细胞可能早在婴儿期便出现。食管中的突变细胞数量随机体年龄的增长而增加,在较年老(至少70岁)的患者体内,突变细胞占了食管上皮细胞的相当大的比例。



环境因子加速突变的克隆细胞的扩张。

虽然有此观察结果,但是作者报告称许多这类细胞并不会发展成癌,ESCC的终生罹患风险依然不高。作者还指出,重度饮酒和吸烟似乎会加速突变的积聚过程,这意味着这些环境因子对于罹患ESCC的风险具有更关键的影响。

原始出处:
Akira Yokoyama, Nobuyuki Kakiuchi, et al. Age-related remodelling of oesophageal epithelia by mutated cancer drivers. Nature. Jan 2019.

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    2019-03-11 liye789132251
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    2019-01-05 1209e435m98(暂无昵称)

    学习了,谢谢分享

    0

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    2019-01-05 zhouqu_8
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    2019-01-04 lovetcm

    交互作用呢

    0

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