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Cell Rep:看看肿瘤细胞是如何被饿死的!

2017-03-17 MedSci MedSci原创

癌细胞能通过改变细胞外营养物质的吸收与利用,从而重新组其新陈代谢机制。近期发表在Cell Rep中的一篇文章,其将表达普通激活癌基因的同种细胞作为研究对象,并分别将同种基因细胞中的氨基酸营养耗尽。目的是研究肿瘤细胞营养供给与生存能力之间的关系。

癌细胞能通过改变细胞外营养物质的吸收与利用,从而重新组其新陈代谢机制。近期发表在Cell Rep中的一篇文章,其将表达普通激活癌基因的同种细胞作为研究对象,并分别将同种基因细胞中的氨基酸营养耗尽。目的是研究肿瘤细胞营养供给与生存能力之间的关系。

在人乳腺上皮(HME)细胞中,胱氨酸的缺乏导致了细胞死亡数量的增加,这些细胞均能表达被激活了的突变型上皮生长因子受体。这些细胞死亡同时伴随同步铁死亡及活性氧(ROS)的产生。过氧化氢能促进细胞的死亡,而过氧化氢酶及NADPH氧化酶-4(NOX4)抑制剂能阻止细胞铁死亡。被阻断了的表皮生长因子(EGFR)或增殖蛋白激酶(MAPKA)也能保护细胞免于铁死亡。反之,在EGFR突变的非小细胞肺癌NSCLC)异种移植的治疗中,伴有胱氨酸酶的耗竭,则能够抑制小鼠肿瘤的生长。

文章的研究结果证实了一种潜在的可能性,即利用EGFR/MAPK驱动的肿瘤对胱氨酸缺乏的敏感性,引起肿瘤细胞的铁死亡。

原始出处:

Poursaitidis I,Wang X,Crighton T,et al.Oncogene-Selective Sensitivity to Synchronous Cell Death following Modulation of the AminoAcid Nutrient Cystine.Cell Rep.2017 Mar 14;18(11):2547-2556. doi: 10.1016/j.celrep.2017.02.054.

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    2018-02-20 维他命
  2. [GetPortalCommentsPageByObjectIdResponse(id=1960066, encodeId=1b6f19600662b, content=<a href='/topic/show?id=dbe6445416' target=_blank style='color:#2F92EE;'>#CEL#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=59, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4454, encryptionId=dbe6445416, topicName=CEL)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c3ff68, createdName=维他命, createdTime=Tue Feb 20 23:52:00 CST 2018, time=2018-02-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1869807, encodeId=a328186980e38, content=<a href='/topic/show?id=fd764459a8' target=_blank style='color:#2F92EE;'>#Cell#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=51, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4459, encryptionId=fd764459a8, topicName=Cell)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=524d95, createdName=zhaozhouchifen, createdTime=Mon Jun 26 21:52:00 CST 2017, time=2017-06-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=181235, encodeId=872618123547, content=有这种方法的理论,就能看见希望, beContent=null, objectType=article, channel=null, level=null, likeNumber=0, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=7a662034114, createdName=桔梗123, createdTime=Sun Mar 19 21:49:23 CST 2017, time=2017-03-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1312951, encodeId=f8be13129510d, content=<a href='/topic/show?id=4ce783062c7' target=_blank style='color:#2F92EE;'>#肿瘤细胞#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=52, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=83062, encryptionId=4ce783062c7, topicName=肿瘤细胞)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c859411, createdName=hmwwww, createdTime=Sun Mar 19 07:52:00 CST 2017, time=2017-03-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=180729, encodeId=1067180e2958, content=该死的都没死,不该死的却死了, beContent=null, objectType=article, channel=null, level=null, likeNumber=79, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/NUyjXTCJjo6KcicAVC1MwuGYaG3DtvrLVJ7HhIECWX4ll1PfCD3ibABpkrZH09K1t3LBib16Twic4GC4YC5eeQ29w9rDgacd9FSH/0, createdBy=f3ae2037787, createdName=医之美, createdTime=Sat Mar 18 00:43:50 CST 2017, time=2017-03-18, status=1, ipAttribution=)]
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    2017-03-19 桔梗123

    有这种方法的理论,就能看见希望

    0

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    2017-03-18 医之美

    该死的都没死,不该死的却死了

    0

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