PNAS:抗癌药物分子可能会诱导癌细胞侵略性增加

2015-07-20 佚名 生物谷

尽管个性化医疗已经初现曙光,大多数的分子疗法都没有取得很好的效果。在癌症领域,癌细胞的抗药性始终很难解决。有的理论认为这些癌细胞能主动地重编程自己的信号通路(网络),来减轻抗癌药物带来的压力,并且在这个过程中会获得更加恶性的特征,比如侵略性增强。由美国费城威斯塔研究所领衔的一个联合课题组发现,一种针对PI3K(磷脂酰肌醇(-3)激酶)的抑制剂,能够诱导癌细胞的转录和信号通路被重编程。 PI3K是

尽管个性化医疗已经初现曙光,大多数的分子疗法都没有取得很好的效果。在癌症领域,癌细胞的抗药性始终很难解决。有的理论认为这些癌细胞能主动地重编程自己的信号通路(网络),来减轻抗癌药物带来的压力,并且在这个过程中会获得更加恶性的特征,比如侵略性增强。由美国费城威斯塔研究所领衔的一个联合课题组发现,一种针对PI3K(磷脂酰肌醇(-3)激酶)的抑制剂,能够诱导癌细胞的转录和信号通路被重编程。

PI3K是一种通用的癌细胞驱动因子,它连接着生长因子信号和下游的很多信号通路,比如细胞增殖、细胞代谢和细胞存活等。几乎在人类的每一种癌细胞中,PI3K都可以作为一个抗癌药物的关键靶点。针对PI3K的几种抑制剂已经被开发出来了,而且有些已经通过了临床测试。然而,不少患者并没有获得预期的疗效,而且为抗药性所困扰。很有可能癌细胞能够适应PI3K抑制剂,形成了新的信号通路。

来自美国费城的这个联合课题组就发现,一种针对PI3K的抑制剂,能够诱导癌细胞产生新的适应策略。这种抑制剂能够引起癌细胞整体的信号通路改变,能够激活生长因子受体,磷酸化Akt家族蛋白,以及磷酸化哺乳动物中雷帕霉素的靶标(mTOR)。进而导致癌细胞的移动性和侵略性增强。这个过程涉及到线粒体的重新分布到皮质细胞骨架,进而引起ATP能量的重新分布。这种皮质细胞骨架与细胞膜的动态变化相关,而且能够反转局部粘连复合体,使得癌细胞的随机移动性增强。通过阻断这些氧化磷酸化磷酸化过程,研究者们观察到了线粒体转移的减少,癌细胞移动性降低,以及癌细胞侵略性的减弱。

因此,针对PI3K的抑制剂能够引起线粒体的时空分布变化。正是癌细胞自身针对外界压力的不断适应,主动调节线粒体的分布,为癌细胞提供了能量,增加了细胞的移动性和侵略性,进而对于抗癌药物产生了很大的适应性和耐药性。这个研究提供了癌细胞耐药性的一种分子机理,处于耐药性通路上的线粒体转移机制,从而可能会成为一种潜在的抗癌药物靶点。通过辅助原来的抗癌药物和新的针对线粒体的新药物,或许能够起到更好的抗癌效果。

原始出处:

M. Cecilia Caino et al.PI3K therapy reprograms mitochondrial trafficking to fuel tumor cell invasion.PNAS.July 14, 2015. doi: 10.1073/pnas.1500722112

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    2016-01-29 drwjr
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    2015-07-22 yxch36
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    2015-07-22 sunylz
  6. [GetPortalCommentsPageByObjectIdResponse(id=1855754, encodeId=10f81855e548f, content=<a href='/topic/show?id=f32014428fc' target=_blank style='color:#2F92EE;'>#PNAS#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=15, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=14428, encryptionId=f32014428fc, topicName=PNAS)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=08e964, createdName=drwjr, createdTime=Fri Jan 29 04:02:00 CST 2016, time=2016-01-29, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1992290, encodeId=27951992290b7, content=<a href='/topic/show?id=bb49269921a' target=_blank style='color:#2F92EE;'>#侵略性#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=27, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=26992, encryptionId=bb49269921a, topicName=侵略性)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c3ae503, createdName=pps20019, createdTime=Thu May 12 05:02:00 CST 2016, time=2016-05-12, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1252042, encodeId=3f5c12520424b, 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=34, 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=Wed Jul 22 00:02:00 CST 2015, time=2015-07-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1308213, encodeId=ab84130821364, content=<a href='/topic/show?id=6e495554550' target=_blank style='color:#2F92EE;'>#抗癌药物#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=55545, encryptionId=6e495554550, topicName=抗癌药物)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=9fe6351, createdName=flyingeagle77, createdTime=Wed Jul 22 00:02:00 CST 2015, time=2015-07-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1314634, encodeId=982c13146346e, content=<a href='/topic/show?id=9d4b5554131' target=_blank style='color:#2F92EE;'>#抗癌药#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=19, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=55541, encryptionId=9d4b5554131, topicName=抗癌药)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=12de429, createdName=sunylz, createdTime=Wed Jul 22 00:02:00 CST 2015, time=2015-07-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=33169, encodeId=3c0c33169eb, content=是不是所说的耐药性或抗药性, beContent=null, objectType=article, channel=null, level=null, likeNumber=137, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=5f331635244, createdName=1dd91c25m01(暂无匿称), createdTime=Mon Jul 20 20:50:00 CST 2015, time=2015-07-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=33155, encodeId=c3bd33155f1, content=不仅仅是药物,放疗也是这样,放疗后的存活下来的肿瘤细胞可能侵袭性更强, beContent=null, objectType=article, channel=null, level=null, likeNumber=88, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=96871613250, createdName=medcardio, createdTime=Mon Jul 20 18:54:00 CST 2015, time=2015-07-20, status=1, ipAttribution=)]
    2015-07-20 1dd91c25m01(暂无匿称)

    是不是所说的耐药性或抗药性

    0

  7. [GetPortalCommentsPageByObjectIdResponse(id=1855754, encodeId=10f81855e548f, content=<a href='/topic/show?id=f32014428fc' target=_blank style='color:#2F92EE;'>#PNAS#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=15, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=14428, encryptionId=f32014428fc, topicName=PNAS)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=08e964, createdName=drwjr, createdTime=Fri Jan 29 04:02:00 CST 2016, time=2016-01-29, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1992290, encodeId=27951992290b7, content=<a href='/topic/show?id=bb49269921a' target=_blank style='color:#2F92EE;'>#侵略性#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=27, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=26992, encryptionId=bb49269921a, topicName=侵略性)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c3ae503, createdName=pps20019, createdTime=Thu May 12 05:02:00 CST 2016, time=2016-05-12, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1252042, encodeId=3f5c12520424b, 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=34, 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=Wed Jul 22 00:02:00 CST 2015, time=2015-07-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1308213, encodeId=ab84130821364, content=<a href='/topic/show?id=6e495554550' target=_blank style='color:#2F92EE;'>#抗癌药物#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=55545, encryptionId=6e495554550, topicName=抗癌药物)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=9fe6351, createdName=flyingeagle77, createdTime=Wed Jul 22 00:02:00 CST 2015, time=2015-07-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1314634, encodeId=982c13146346e, content=<a href='/topic/show?id=9d4b5554131' target=_blank style='color:#2F92EE;'>#抗癌药#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=19, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=55541, encryptionId=9d4b5554131, topicName=抗癌药)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=12de429, createdName=sunylz, createdTime=Wed Jul 22 00:02:00 CST 2015, time=2015-07-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=33169, encodeId=3c0c33169eb, content=是不是所说的耐药性或抗药性, beContent=null, objectType=article, channel=null, level=null, likeNumber=137, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=5f331635244, createdName=1dd91c25m01(暂无匿称), createdTime=Mon Jul 20 20:50:00 CST 2015, time=2015-07-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=33155, encodeId=c3bd33155f1, content=不仅仅是药物,放疗也是这样,放疗后的存活下来的肿瘤细胞可能侵袭性更强, beContent=null, objectType=article, channel=null, level=null, likeNumber=88, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=96871613250, createdName=medcardio, createdTime=Mon Jul 20 18:54:00 CST 2015, time=2015-07-20, status=1, ipAttribution=)]
    2015-07-20 medcardio

    不仅仅是药物,放疗也是这样,放疗后的存活下来的肿瘤细胞可能侵袭性更强

    0