Toxicol Sci:新技术快速检测空气污染物致癌风险

2015-05-14 佚名 生物谷

近日,刊登于国际杂志Toxicological Sciences上的一篇研究论文中,来自俄勒冈州立大学的研究人员通过研究开发了一种快速高效的技术,其可以估测常见的特定环境污染物给人体所带来的致癌风险。研究者可以通过分析暴露小鼠的皮肤细胞所产生的即时遗传反应,同时应用统计学方法来确定是否这些细胞最终会具有癌变性。 本文研究主要针对一些重要的常见环境污染物,比如多环芳烃(polycyclic a

近日,刊登于国际杂志Toxicological Sciences上的一篇研究论文中,来自俄勒冈州立大学的研究人员通过研究开发了一种快速高效的技术,其可以估测常见的特定环境污染物给人体所带来的致癌风险。研究者可以通过分析暴露小鼠的皮肤细胞所产生的即时遗传反应,同时应用统计学方法来确定是否这些细胞最终会具有癌变性。

本文研究主要针对一些重要的常见环境污染物,比如多环芳烃(polycyclic aromatic hydrocarbons,PAHs),其通常在空气中以一种混合物的形式存在,比如汽车尾气及吸烟的烟雾。研究者Susan Tilton说道,仅在12小时以内我们就可以预测特定PAH混合物致癌的能力,而不用等25周以后肿瘤长出来;对于PAH混合物,这种新技术不仅可以快速而且可以非常高效准确地评估其致癌风险。

目前该技术需要利用大量的化合物及混合物进行检测,但如今研究者已经开发出了一种模型,利用该模型研究者就可以在实验室培养皿中对人类细胞进行大规模的筛选测试了。本文中开发的新技术尤其可以用于进行PAHs的筛查;人类最开始都会暴露于含有PAHs混合物的空气中,这就使得新技术难以评估PAHs对人类致癌的风险。研究者Tilton说道,进行标准的计算就可以鉴别出混合物中每一种物质对机体的致癌风险,最后再进行相加就可以算出整个PAHs对机体的致癌风险了。

这种技术目前并不能对很多种PAH进行分析,本文研究中研究者对三种常存在于空气中的PAH混合物进行了评估,即煤焦油、汽车尾气及吸烟烟雾,结果发现,每一种物质都会触发小鼠皮肤细胞发生一系列级联生化反应及代谢改变,这种反应相当于遗传改变的特殊“指纹”一样,而这只有当细胞对暴露环境中的化合物产生反应才会出现。随着细胞开始癌变同时匹配这些已知的遗传改变模式,研究人员发现某些细胞反应可以作为癌症发生的早期指示器,同时他们还发现,检测致癌物质的标准方法或许低估了某些混合物对机体的致癌风险以及不同混合物结合起来引发的风险。

本文研究首次基于PAH混合物单一组分对机体的致癌风险进行了评估,同时研究者开发出了一种准确的技术来分析整体混合物对机体的风险,他们希望通过引入这种技术或可在未来快速分析出环境污染物对机体的致癌风险,这对于开发有效预防癌症的方法提供了一定基础和线索。

原始出处:

Susan C. Tilton, Lisbeth K. Siddens, Sharon K. Krueger, Andrew J. Larkin, Christiane V. Löhr§, David E. Williams, William M. Baird, and Katrina M. Waters.Mechanism-based classification of PAH mixtures to predict carcinogenic potential.Toxicol. Sci.April 22, 2015.doi: 10.1093/toxsci/kfv080

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  5. [GetPortalCommentsPageByObjectIdResponse(id=2023312, encodeId=c5eb2023312d0, content=<a href='/topic/show?id=bb29865199d' target=_blank style='color:#2F92EE;'>#致癌风险#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=44, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=86519, encryptionId=bb29865199d, topicName=致癌风险)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=19ad38, createdName=lq1767, createdTime=Thu Oct 22 09:12:00 CST 2015, time=2015-10-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1903691, encodeId=b90a190369164, content=<a href='/topic/show?id=be285836438' target=_blank style='color:#2F92EE;'>#新技术#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=32, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=58364, encryptionId=be285836438, topicName=新技术)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=d39f177, createdName=lixiao3326, createdTime=Thu Mar 17 15:12:00 CST 2016, time=2016-03-17, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1655095, encodeId=449f1655095df, content=<a href='/topic/show?id=feebe536457' target=_blank style='color:#2F92EE;'>#空气污染物#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=34, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=75364, encryptionId=feebe536457, topicName=空气污染物)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=c71924628250, createdName=yytms, createdTime=Fri Nov 13 11:12:00 CST 2015, time=2015-11-13, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=23943, encodeId=00502394328, content=看看, beContent=null, objectType=article, channel=null, level=null, likeNumber=14, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=ee0d1618732, createdName=huaxipanxing, createdTime=Sun May 17 20:14:00 CST 2015, time=2015-05-17, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2061464, encodeId=4815206146458, content=<a href='/topic/show?id=e6e1e15509f' target=_blank style='color:#2F92EE;'>#癌风险#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=0, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=71550, encryptionId=e6e1e15509f, topicName=癌风险)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=d58a435, createdName=sjq027, createdTime=Fri Aug 21 02:12:00 CST 2015, time=2015-08-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1370824, encodeId=1c7d13e08247e, content=<a href='/topic/show?id=9c39864991e' target=_blank style='color:#2F92EE;'>#致癌#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=20, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=86499, encryptionId=9c39864991e, topicName=致癌)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2c25323, createdName=jambiya, createdTime=Sat May 16 00:12:00 CST 2015, time=2015-05-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1472474, encodeId=8dcb14e24749d, content=<a href='/topic/show?id=ba4a6436107' target=_blank style='color:#2F92EE;'>#污染#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=18, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=64361, encryptionId=ba4a6436107, topicName=污染)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=dfe67217539, createdName=小刀医生, createdTime=Sat May 16 00:12:00 CST 2015, time=2015-05-16, status=1, ipAttribution=)]
    2015-08-21 sjq027
  6. [GetPortalCommentsPageByObjectIdResponse(id=2023312, encodeId=c5eb2023312d0, content=<a href='/topic/show?id=bb29865199d' target=_blank style='color:#2F92EE;'>#致癌风险#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=44, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=86519, encryptionId=bb29865199d, topicName=致癌风险)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=19ad38, createdName=lq1767, createdTime=Thu Oct 22 09:12:00 CST 2015, time=2015-10-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1903691, encodeId=b90a190369164, content=<a href='/topic/show?id=be285836438' target=_blank style='color:#2F92EE;'>#新技术#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=32, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=58364, encryptionId=be285836438, topicName=新技术)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=d39f177, createdName=lixiao3326, createdTime=Thu Mar 17 15:12:00 CST 2016, time=2016-03-17, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1655095, encodeId=449f1655095df, content=<a href='/topic/show?id=feebe536457' target=_blank style='color:#2F92EE;'>#空气污染物#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=34, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=75364, encryptionId=feebe536457, topicName=空气污染物)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=c71924628250, createdName=yytms, createdTime=Fri Nov 13 11:12:00 CST 2015, time=2015-11-13, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=23943, encodeId=00502394328, content=看看, beContent=null, objectType=article, channel=null, level=null, likeNumber=14, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=ee0d1618732, createdName=huaxipanxing, createdTime=Sun May 17 20:14:00 CST 2015, time=2015-05-17, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2061464, encodeId=4815206146458, content=<a href='/topic/show?id=e6e1e15509f' target=_blank style='color:#2F92EE;'>#癌风险#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=0, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=71550, encryptionId=e6e1e15509f, topicName=癌风险)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=d58a435, createdName=sjq027, createdTime=Fri Aug 21 02:12:00 CST 2015, time=2015-08-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1370824, encodeId=1c7d13e08247e, content=<a href='/topic/show?id=9c39864991e' target=_blank style='color:#2F92EE;'>#致癌#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=20, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=86499, encryptionId=9c39864991e, topicName=致癌)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2c25323, createdName=jambiya, createdTime=Sat May 16 00:12:00 CST 2015, time=2015-05-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1472474, encodeId=8dcb14e24749d, content=<a href='/topic/show?id=ba4a6436107' target=_blank style='color:#2F92EE;'>#污染#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=18, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=64361, encryptionId=ba4a6436107, topicName=污染)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=dfe67217539, createdName=小刀医生, createdTime=Sat May 16 00:12:00 CST 2015, time=2015-05-16, status=1, ipAttribution=)]
    2015-05-16 jambiya
  7. [GetPortalCommentsPageByObjectIdResponse(id=2023312, encodeId=c5eb2023312d0, content=<a href='/topic/show?id=bb29865199d' target=_blank style='color:#2F92EE;'>#致癌风险#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=44, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=86519, encryptionId=bb29865199d, topicName=致癌风险)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=19ad38, createdName=lq1767, createdTime=Thu Oct 22 09:12:00 CST 2015, time=2015-10-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1903691, encodeId=b90a190369164, content=<a href='/topic/show?id=be285836438' target=_blank style='color:#2F92EE;'>#新技术#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=32, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=58364, encryptionId=be285836438, topicName=新技术)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=d39f177, createdName=lixiao3326, createdTime=Thu Mar 17 15:12:00 CST 2016, time=2016-03-17, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1655095, encodeId=449f1655095df, content=<a href='/topic/show?id=feebe536457' target=_blank style='color:#2F92EE;'>#空气污染物#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=34, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=75364, encryptionId=feebe536457, topicName=空气污染物)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=c71924628250, createdName=yytms, createdTime=Fri Nov 13 11:12:00 CST 2015, time=2015-11-13, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=23943, encodeId=00502394328, content=看看, beContent=null, objectType=article, channel=null, level=null, likeNumber=14, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=ee0d1618732, createdName=huaxipanxing, createdTime=Sun May 17 20:14:00 CST 2015, time=2015-05-17, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2061464, encodeId=4815206146458, content=<a href='/topic/show?id=e6e1e15509f' target=_blank style='color:#2F92EE;'>#癌风险#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=0, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=71550, encryptionId=e6e1e15509f, topicName=癌风险)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=d58a435, createdName=sjq027, createdTime=Fri Aug 21 02:12:00 CST 2015, time=2015-08-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1370824, encodeId=1c7d13e08247e, content=<a href='/topic/show?id=9c39864991e' target=_blank style='color:#2F92EE;'>#致癌#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=20, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=86499, encryptionId=9c39864991e, topicName=致癌)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2c25323, createdName=jambiya, createdTime=Sat May 16 00:12:00 CST 2015, time=2015-05-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1472474, encodeId=8dcb14e24749d, content=<a href='/topic/show?id=ba4a6436107' target=_blank style='color:#2F92EE;'>#污染#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=18, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=64361, encryptionId=ba4a6436107, topicName=污染)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=dfe67217539, createdName=小刀医生, createdTime=Sat May 16 00:12:00 CST 2015, time=2015-05-16, status=1, ipAttribution=)]