不走寻常路!癌细胞能沿着血管外壁转移,化疗对此也无效!

2016-08-17 佚名 来宝网

加州大学洛杉矶分校加州纳米技术研究院的科学家们确认了一个癌细胞转移的不寻常的理论,向此方向的研究迈出了一大步。他们的发现可能有助于提出新防止黑色素瘤转移的新战略。 关于癌症如何传播的一种很普遍的理论是,肿瘤细胞从原发肿瘤脱落,并通过血液到达其他器官,并在新的附着点处生长成新的肿瘤。但是,有关转移过程的问题仍然未解,因为在循环血液中的肿瘤细胞,有时寿命很短,而且缺乏关于细胞如何离开血液附着到器

加州大学洛杉矶分校加州纳米技术研究院的科学家们确认了一个癌细胞转移的不寻常的理论,向此方向的研究迈出了一大步。他们的发现可能有助于提出新防止黑色素瘤转移的新战略。

关于癌症如何传播的一种很普遍的理论是,肿瘤细胞从原发肿瘤脱落,并通过血液到达其他器官,并在新的附着点处生长成新的肿瘤。但是,有关转移过程的问题仍然未解,因为在循环血液中的肿瘤细胞,有时寿命很短,而且缺乏关于细胞如何离开血液附着到器官上的知识。

该研究小组由洛朗邦托利拉—加州大学洛杉矶分校高级光学显微镜/谱实验室的主任牵头,还包括Lugassy 和Raymond Barnhill(原先在加州大学洛杉矶分校,现在法国居里研究所)。他们的理论是,除了现有的转移途径,癌细胞也可以通过一个称为“血管趋向性”的机制,这意味着它们可以沿血管的外侧进行传播,而不进入到血液中。

在过去的十年中,Lugassy和Barnhill搜集了关于肿瘤细胞,尤其是致命的皮肤癌—黑色素瘤,像小蜘蛛般沿着血管外侧蠕动传播的证据。他们还发现,迁移的癌细胞会模仿周细胞,防止自身被人体的免疫细胞杀死。周细胞排列在毛细血管周围。

邦托利拉的研究小组做出的研究标志着第一次完成了这些迁移细胞的3-D成像。

为了完成成像,科学家们将红色荧光染料注入血管进行染色,而将人黑素瘤细胞,染成绿色,分别注入小鼠脑部。他们使用了一种叫做共焦荧光显微镜的显微技术,该技术提供了真正的三维光学分辨率,以创建染色的肿瘤细胞和血管在特定光照下呈现出3-D图像。图像显示,细胞开始在注射部位成长为原发肿瘤。不久,研究人员观察到,绿色的肿瘤细胞沿着染成红色的血管的外表面迁移扩散。

“Lugassy和Barnhill的研究向‘所有转移性癌细胞从原发肿瘤上脱落并进入血液’的假说提出了质疑,”邦托利拉说:“如果肿瘤细胞可以沿着血管和其它解剖结构的表面,如神经,进行连续迁移和扩散,那么它们就拥有了血液以外的逃离途径。”

如果发现血液中循环存在肿瘤细胞,邦托利拉说,医生可能会开化疗。

“但是,如果转移性癌细胞在血管外面,”他说,“他们就能逃脱治疗,继续蔓延。”

这一发现将帮助研究人员寻找治疗致命性癌症的新疗法,如胶质瘤、胶质母细胞瘤、胰腺癌、前列腺癌和妇科的癌肉瘤。

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    2016-08-28 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=106159, encodeId=3d9310615931, 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=77, 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=Sun Aug 28 10:15:00 CST 2016, time=2016-08-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=102349, encodeId=2f3010234981, content=新发现,学习啦, beContent=null, objectType=article, channel=null, level=null, likeNumber=73, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/mStl88fu4NfdY7yem1P7bRvOP6z0jKsBoYR8ezfAricY7meQWcte7LRJsWHVn0CnPJg2JuQmevR0DoFmmEib5QLD2kNESBESQT/0, createdBy=59191706502, createdName=医路开来, createdTime=Mon Aug 22 21:02:00 CST 2016, time=2016-08-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=102148, encodeId=96a110214863, content=值得学习, beContent=null, objectType=article, channel=null, level=null, likeNumber=63, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=5a431926374, createdName=1e0bc67dm33(暂无匿称), createdTime=Mon Aug 22 08:36:00 CST 2016, time=2016-08-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=102044, encodeId=f7f11020445e, content=在人体复杂的环境下,多种方式的转移有存在的可能。, beContent=null, objectType=article, channel=null, level=null, likeNumber=65, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=d1ab1619415, createdName=lecoo, createdTime=Sun Aug 21 17:37:00 CST 2016, time=2016-08-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=101809, encodeId=3dae101809cd, content=有意思, beContent=null, objectType=article, channel=null, level=null, likeNumber=66, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/mStl88fu4NfNLvzZhgPxRiaKicWybj5Q5KN7PWibALciaJ4W5bZwTlDSFRibFu87125pCq0IXePrC0mpbiasADRqL4NcjUoyQCT9De/0, createdBy=7c7e1636498, createdName=wzf990214, createdTime=Sat Aug 20 22:00:00 CST 2016, time=2016-08-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=101543, encodeId=991c101543f0, content=值得学习, beContent=null, objectType=article, channel=null, level=null, likeNumber=27, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTLMzGpMQ8w4I7FpiblCXNcmI6O7TDINutbaicEUpoYFR1rWqn3kTbulfMhT0iaPFurLz2ddEcWe3BiciaQ/0, createdBy=5f6e1724878, createdName=136****0753赵, createdTime=Sat Aug 20 15:25:00 CST 2016, time=2016-08-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=100781, encodeId=68ab100e8150, content=知识在不断丰富,希望治疗手段会随着发展, beContent=null, objectType=article, channel=null, level=null, likeNumber=19, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/DYAIOgq83eocJY6moGTnYzC8V8lUl3k679Uxh0PVMjIamhoDYuSYr6D4KDKlbpuNuCKFlJaiaVrmFIrbseIWqUA/132, createdBy=ad571630249, createdName=马里奥8433, createdTime=Fri Aug 19 13:53:00 CST 2016, time=2016-08-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1252123, encodeId=b2ea125212369, content=<a href='/topic/show?id=3efee1519b2' target=_blank style='color:#2F92EE;'>#癌细胞#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=25, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=71519, encryptionId=3efee1519b2, topicName=癌细胞)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=4cea26, createdName=yxch36, createdTime=Fri Aug 19 11:26:00 CST 2016, time=2016-08-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=100078, encodeId=f1a71000e806, content=肿瘤细胞沿着血管和其它解剖结构的表面,进行连续迁移和扩散,就有血液以外的逃离途径。, beContent=null, objectType=article, channel=null, level=null, likeNumber=26, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=f5b11304786, createdName=ljh0111, createdTime=Thu Aug 18 00:04:00 CST 2016, time=2016-08-18, status=1, ipAttribution=)]
    2016-08-22 医路开来

    新发现,学习啦

    0

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    2016-08-22 1e0bc67dm33(暂无匿称)

    值得学习

    0

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    2016-08-21 lecoo

    在人体复杂的环境下,多种方式的转移有存在的可能。

    0

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    2016-08-20 wzf990214

    有意思

    0

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    2016-08-20 136****0753赵

    值得学习

    0

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    2016-08-19 马里奥8433

    知识在不断丰富,希望治疗手段会随着发展

    0

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    2016-08-19 yxch36
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    2016-08-18 ljh0111

    肿瘤细胞沿着血管和其它解剖结构的表面,进行连续迁移和扩散,就有血液以外的逃离途径。

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