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Science:结直肠癌对靶向疗法的适应性变异

2019-12-14 海北 MedSci原创

耐药性的出现限制了靶向疗法在人类肿瘤中的功效。现在大家普遍的看法是耐药是既成事实:开始治疗时,癌症已经含有耐药性突变细胞。

耐药性的出现限制了靶向疗法在人类肿瘤中的功效。现在大家普遍的看法是耐药是既成事实:开始治疗时,癌症已经含有耐药性突变细胞。暴露于抗生素的细菌会暂时增加其突变率(自适应变异性),从而提高了生存的可能性。

最近,研究人员调查了人类直肠癌CRC)细胞是否同样利用自适应变异性来规避治疗压力。

研究人员发现,表皮生长因子受体(EGFR/ BRAF的抑制会下调错配修复(MMR)和同源重组(HRDNA修复基因,同时在药物耐受性细胞中上调易错的聚合酶。

在治疗期间,源自患者的异种移植物和肿瘤标本中的MMR蛋白也下调。 EGFR / BRAF抑制可诱导DNA损伤,增加变异性并触发微卫星不稳定性。

因此,像单细胞生物一样,肿瘤细胞通过增强变异性来规避治疗压力。


原始出处:

Mariangela Russo et al. Adaptive mutability of colorectal cancers in response to targeted therapies. Science, 2019; DOI: 10.1126/science.aav4474


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    2019-12-16 jichang
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  6. [GetPortalCommentsPageByObjectIdResponse(id=1342627, encodeId=e1b9134262ed9, content=<a href='/topic/show?id=34cb381023e' target=_blank style='color:#2F92EE;'>#变异#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=59, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=38102, encryptionId=34cb381023e, topicName=变异)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=78c32500188, createdName=12498dabm77暂无昵称, createdTime=Mon Dec 16 07:17:00 CST 2019, time=2019-12-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1376020, encodeId=bdec13e60203e, content=<a href='/topic/show?id=2949159989d' target=_blank style='color:#2F92EE;'>#SCIE#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=88, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=15998, encryptionId=2949159989d, topicName=SCIE)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=17a3387, createdName=jichang, createdTime=Mon Dec 16 07:17:00 CST 2019, time=2019-12-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1378546, encodeId=e8a113e854683, content=<a href='/topic/show?id=2cf09992871' target=_blank style='color:#2F92EE;'>#靶向疗法#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=80, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=99928, encryptionId=2cf09992871, topicName=靶向疗法)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=b676418, createdName=yanghan, createdTime=Mon Dec 16 07:17:00 CST 2019, time=2019-12-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1453327, encodeId=999d145332e88, content=<a href='/topic/show?id=098ee8679ad' target=_blank style='color:#2F92EE;'>#结直肠#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=97, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=78679, encryptionId=098ee8679ad, topicName=结直肠)], attachment=null, authenticateStatus=null, createdAvatar=/v1.0.0/img/user_icon.png, createdBy=9ace5575596, createdName=crystal0564, createdTime=Mon Dec 16 07:17:00 CST 2019, time=2019-12-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1621030, encodeId=23f1162103020, content=<a href='/topic/show?id=dccc94e01c9' target=_blank style='color:#2F92EE;'>#适应性#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=121, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=94701, encryptionId=dccc94e01c9, topicName=适应性)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=b13a20191510, createdName=huhuaidong394, createdTime=Mon Dec 16 07:17:00 CST 2019, time=2019-12-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=377004, encodeId=58c23e70043d, content=好, beContent=null, objectType=article, channel=null, level=null, likeNumber=131, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=bbc11488193, createdName=thm112988, createdTime=Mon Dec 16 03:02:59 CST 2019, time=2019-12-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=376964, encodeId=07d73e69644a, content=谢谢了,学习, beContent=null, objectType=article, channel=null, level=null, likeNumber=114, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=30331616752, createdName=txqjm, createdTime=Sun Dec 15 07:06:38 CST 2019, time=2019-12-15, status=1, ipAttribution=)]
    2019-12-16 thm112988

    0

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    2019-12-15 txqjm

    谢谢了,学习

    0

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