Nature:从血液入手早期确诊癌症之王

2015-06-29 佚名 生物谷

根据德克萨斯大学MD安德森癌症中心的一项研究,存在于癌症外泌体(exosomes)上的glypican-1 (GPC1)基因编码蛋白,或许可以作为一种潜在非侵入性诊断和筛查工具的组成部分,用来检测有可能尚处于适合手术治疗阶段的早期胰腺癌。这项研究工作发布在6月24日的《自然》(Nature)杂志上。 外泌体是由癌细胞分泌的一种微型病毒样大小的颗粒,其中包含着DNA、RNA和蛋白质。科学家们从

根据德克萨斯大学MD安德森癌症中心的一项研究,存在于癌症外泌体(exosomes)上的glypican-1 (GPC1)基因编码蛋白,或许可以作为一种潜在非侵入性诊断和筛查工具的组成部分,用来检测有可能尚处于适合手术治疗阶段的早期胰腺癌。这项研究工作发布在6月24日的《自然》(Nature)杂志上。

外泌体是由癌细胞分泌的一种微型病毒样大小的颗粒,其中包含着DNA、RNA和蛋白质。科学家们从胰腺癌患者血液中分离出富含GPC1的循环外泌体——GPC1+ crExos,并对其进行了监测。

癌症生物学教授Raghu Kalluri博士说:“我们在来自大约250名胰腺癌患者的少量血清中检测到了GPC1+ crExos,这一检测绝对的特异和敏感,重要的是将慢性胰腺炎患者与早期和晚期胰腺癌患者区分了出来。”

Kalluri说:“在手术切除肿瘤后患者体内的GPC1+ crExos水平显着下降。”该研究还检测了来自健康供体、乳腺癌和胰腺癌患者的crExos。在两种癌症中都可以看到GPC1+ crExos增高。

“不同于循环肿瘤细胞(CTCs)需要大量的新鲜血液,在大约30年前保存到冷冻库的血液样本中也可以检测和分离出GPC1+ crExos。可以从储存样本分离出的癌症外泌体中提取出DNA、RNA和蛋白质,用于进一步的遗传和生物分析。因此,癌症外泌体不仅仅是一种生物标记物,分离出它们还可为我们提供一个癌症特异性信息的宝库。”

相比常用的CA 19-9生物标志物,GPC1+ crExos似乎是一种更可靠的筛查工具。研究发现,在胰腺癌小鼠模型还未显示出MRI可以检测到的胰腺疾病迹象之时,GPC1+ crExos就检测到了胰腺癌的可能性。

癌症系统成像教授David Piwnica-Worms博士说:“采用MRI或CT对普通人群进行胰腺癌常规筛查,价格高昂,且有可能出现许多假阳性结果。我们的研究表明,GPC1+ crExos有潜力作为一种胰腺癌的检测和监测工具与影像学联合使用,突显了它在癌症早期检测中的应用。”

Kalluri说,由于在这些外泌体中可以检测出胰腺癌特异性的遗传特征,其有着极大的潜力提高MRI或CT的特异性。

如果能够早期检测到癌症,就可以采用胰十二指肠切除术来治疗胰腺癌患者。由于胰腺癌确诊时常常已到晚期,只有15%的患者适合于接受手术。

Kalluri说:“一些研究比较了疾病阶段和手术后的结果,表明如果能够在较早期诊断这一疾病就可以降低胰腺癌的死亡率。这为早期检测胰腺癌以及设计出潜在的治疗手术方案提供了一个前所未有的机会。”

原始出处:

Sonia A. Melo, Linda B. Luecke, Christoph Kahlert et al.Glypican-1 identifies cancer exosomes and detects early pancreatic cancer.Nature, June 24, 2015.doi:10.1038/nature14581

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    2016-08-27 李东泽

    这篇资讯带给我们新知识,启发新思维,不论是科研还是临床工作都有很大的帮助。。。

    0

  2. [GetPortalCommentsPageByObjectIdResponse(id=105975, encodeId=32bc1059e5f2, content=这篇资讯带给我们新知识,启发新思维,不论是科研还是临床工作都有很大的帮助。。。, beContent=null, objectType=article, channel=null, level=null, likeNumber=59, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/jW482SpianMayicTRbRZ5RzUn81b5CF5ibVPib8jWI92iciaxmqGHlwruOnK4SVZykd4iahqo1hicklIibyZoxm55X7EM8BW9eX1h1hQ2/0, createdBy=8aa81937526, createdName=李东泽, createdTime=Sat Aug 27 22:40:00 CST 2016, time=2016-08-27, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=59854, encodeId=77ba5985474, content=这篇文章有一定深度, beContent=null, objectType=article, channel=null, level=null, likeNumber=120, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=59121683644, createdName=doctording1, createdTime=Tue Jan 26 17:00:00 CST 2016, time=2016-01-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=59855, encodeId=86fd59855df, content=是一篇不错的文章, beContent=null, objectType=article, channel=null, level=null, likeNumber=127, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=59121683644, createdName=doctording1, createdTime=Tue Jan 26 17:00:00 CST 2016, time=2016-01-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=59856, encodeId=39bd59856cf, content=是一篇不错的文章, beContent=null, objectType=article, channel=null, level=null, likeNumber=107, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=59121683644, createdName=doctording1, createdTime=Tue Jan 26 17:00:00 CST 2016, time=2016-01-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1880706, encodeId=4e921880e0620, content=<a href='/topic/show?id=3b2112532d8' target=_blank style='color:#2F92EE;'>#Nat#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=27, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=12532, encryptionId=3b2112532d8, topicName=Nat)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2e6f107, createdName=liye789132251, createdTime=Sun Mar 20 11:35:00 CST 2016, time=2016-03-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=34278, encodeId=10ee342e8ca, content=早期诊断,可靠性不易,所以医院现在做的基本是确诊,哎~~, beContent=null, objectType=article, channel=null, level=null, likeNumber=75, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=9b159816, createdName=shneye, createdTime=Mon Aug 03 16:21:00 CST 2015, time=2015-08-03, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=30701, encodeId=43e030e0154, content=不错学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=133, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=0a6a1604604, createdName=Gsurgeon, createdTime=Sat Jul 04 23:01:00 CST 2015, time=2015-07-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=30675, encodeId=214c306e5a6, content=看看, beContent=null, objectType=article, channel=null, level=null, likeNumber=44, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=ee0d1618732, createdName=huaxipanxing, createdTime=Sat Jul 04 16:05:00 CST 2015, time=2015-07-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=30300, encodeId=803130300fb, content=exosomes在肿瘤中的价值值得好好研究, beContent=null, objectType=article, channel=null, level=null, likeNumber=68, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20170803/IMG5982F7A3DBB3C1061.jpg, createdBy=0ba51605600, createdName=Jianghuiqin, createdTime=Fri Jul 03 11:12:00 CST 2015, time=2015-07-03, status=1, ipAttribution=)]
    2016-01-26 doctording1

    这篇文章有一定深度

    0

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    2016-01-26 doctording1

    是一篇不错的文章

    0

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    2016-01-26 doctording1

    是一篇不错的文章

    0

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    2016-03-20 liye789132251
  6. [GetPortalCommentsPageByObjectIdResponse(id=105975, encodeId=32bc1059e5f2, content=这篇资讯带给我们新知识,启发新思维,不论是科研还是临床工作都有很大的帮助。。。, beContent=null, objectType=article, channel=null, level=null, likeNumber=59, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/jW482SpianMayicTRbRZ5RzUn81b5CF5ibVPib8jWI92iciaxmqGHlwruOnK4SVZykd4iahqo1hicklIibyZoxm55X7EM8BW9eX1h1hQ2/0, createdBy=8aa81937526, createdName=李东泽, createdTime=Sat Aug 27 22:40:00 CST 2016, time=2016-08-27, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=59854, encodeId=77ba5985474, content=这篇文章有一定深度, beContent=null, objectType=article, channel=null, level=null, likeNumber=120, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=59121683644, createdName=doctording1, createdTime=Tue Jan 26 17:00:00 CST 2016, time=2016-01-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=59855, encodeId=86fd59855df, content=是一篇不错的文章, beContent=null, objectType=article, channel=null, level=null, likeNumber=127, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=59121683644, createdName=doctording1, createdTime=Tue Jan 26 17:00:00 CST 2016, time=2016-01-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=59856, encodeId=39bd59856cf, content=是一篇不错的文章, beContent=null, objectType=article, channel=null, level=null, likeNumber=107, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=59121683644, createdName=doctording1, createdTime=Tue Jan 26 17:00:00 CST 2016, time=2016-01-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1880706, encodeId=4e921880e0620, content=<a href='/topic/show?id=3b2112532d8' target=_blank style='color:#2F92EE;'>#Nat#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=27, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=12532, encryptionId=3b2112532d8, topicName=Nat)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2e6f107, createdName=liye789132251, createdTime=Sun Mar 20 11:35:00 CST 2016, time=2016-03-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=34278, encodeId=10ee342e8ca, content=早期诊断,可靠性不易,所以医院现在做的基本是确诊,哎~~, beContent=null, objectType=article, channel=null, level=null, likeNumber=75, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=9b159816, createdName=shneye, createdTime=Mon Aug 03 16:21:00 CST 2015, time=2015-08-03, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=30701, encodeId=43e030e0154, content=不错学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=133, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=0a6a1604604, createdName=Gsurgeon, createdTime=Sat Jul 04 23:01:00 CST 2015, time=2015-07-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=30675, encodeId=214c306e5a6, content=看看, beContent=null, objectType=article, channel=null, level=null, likeNumber=44, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=ee0d1618732, createdName=huaxipanxing, createdTime=Sat Jul 04 16:05:00 CST 2015, time=2015-07-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=30300, encodeId=803130300fb, content=exosomes在肿瘤中的价值值得好好研究, beContent=null, objectType=article, channel=null, level=null, likeNumber=68, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20170803/IMG5982F7A3DBB3C1061.jpg, createdBy=0ba51605600, createdName=Jianghuiqin, createdTime=Fri Jul 03 11:12:00 CST 2015, time=2015-07-03, status=1, ipAttribution=)]
    2015-08-03 shneye

    早期诊断,可靠性不易,所以医院现在做的基本是确诊,哎~~

    0

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    2015-07-04 Gsurgeon

    不错学习了

    0

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    2015-07-04 huaxipanxing

    看看

    0

  9. [GetPortalCommentsPageByObjectIdResponse(id=105975, encodeId=32bc1059e5f2, content=这篇资讯带给我们新知识,启发新思维,不论是科研还是临床工作都有很大的帮助。。。, beContent=null, objectType=article, channel=null, level=null, likeNumber=59, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/jW482SpianMayicTRbRZ5RzUn81b5CF5ibVPib8jWI92iciaxmqGHlwruOnK4SVZykd4iahqo1hicklIibyZoxm55X7EM8BW9eX1h1hQ2/0, createdBy=8aa81937526, createdName=李东泽, createdTime=Sat Aug 27 22:40:00 CST 2016, time=2016-08-27, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=59854, encodeId=77ba5985474, content=这篇文章有一定深度, beContent=null, objectType=article, channel=null, level=null, likeNumber=120, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=59121683644, createdName=doctording1, createdTime=Tue Jan 26 17:00:00 CST 2016, time=2016-01-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=59855, encodeId=86fd59855df, content=是一篇不错的文章, beContent=null, objectType=article, channel=null, level=null, likeNumber=127, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=59121683644, createdName=doctording1, createdTime=Tue Jan 26 17:00:00 CST 2016, time=2016-01-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=59856, encodeId=39bd59856cf, content=是一篇不错的文章, beContent=null, objectType=article, channel=null, level=null, likeNumber=107, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=59121683644, createdName=doctording1, createdTime=Tue Jan 26 17:00:00 CST 2016, time=2016-01-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1880706, encodeId=4e921880e0620, content=<a href='/topic/show?id=3b2112532d8' target=_blank style='color:#2F92EE;'>#Nat#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=27, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=12532, encryptionId=3b2112532d8, topicName=Nat)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2e6f107, createdName=liye789132251, createdTime=Sun Mar 20 11:35:00 CST 2016, time=2016-03-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=34278, encodeId=10ee342e8ca, content=早期诊断,可靠性不易,所以医院现在做的基本是确诊,哎~~, beContent=null, objectType=article, channel=null, level=null, likeNumber=75, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=9b159816, createdName=shneye, createdTime=Mon Aug 03 16:21:00 CST 2015, time=2015-08-03, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=30701, encodeId=43e030e0154, content=不错学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=133, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=0a6a1604604, createdName=Gsurgeon, createdTime=Sat Jul 04 23:01:00 CST 2015, time=2015-07-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=30675, encodeId=214c306e5a6, content=看看, beContent=null, objectType=article, channel=null, level=null, likeNumber=44, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=ee0d1618732, createdName=huaxipanxing, createdTime=Sat Jul 04 16:05:00 CST 2015, time=2015-07-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=30300, encodeId=803130300fb, content=exosomes在肿瘤中的价值值得好好研究, beContent=null, objectType=article, channel=null, level=null, likeNumber=68, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20170803/IMG5982F7A3DBB3C1061.jpg, createdBy=0ba51605600, createdName=Jianghuiqin, createdTime=Fri Jul 03 11:12:00 CST 2015, time=2015-07-03, status=1, ipAttribution=)]
    2015-07-03 Jianghuiqin

    exosomes在肿瘤中的价值值得好好研究

    0

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