Nat Commun:EZH2介导的PP2A失活介导乳腺癌HER2靶向治疗的耐药性

2020-11-29 xiaozeng MedSci原创

HER2的靶向治疗能够显著改善HER2阳性乳腺癌患者的预后。尽管如此,仍有将近一半的此类患者由于固有的或获得性抵抗遭受疾病的复发。因此,开发其他靶向治疗策略以克服临床治疗的耐药性迫在眉睫。

HER2的靶向治疗能够显著改善HER2阳性乳腺癌患者的预后。尽管如此,仍有将近一半的此类患者由于固有的或获得性抵抗遭受疾病的复发。因此,开发其他靶向治疗策略以克服临床治疗的耐药性迫在眉睫。

该研究揭示PP2A(蛋白磷酸酶2A)调节亚基PPP2R2B是抗HER2反应的关键决定因子。研究人员发现,在HER2+乳腺癌患者中PPP2R2B的表达水平下调,这与患者不良的临床结果和HER2靶向疗法的耐药性相关。

PPP2R2B的表达下调增加了疾病发生风险和HER2靶向治疗的不良反应

研究人员发现,EZH2介导的组蛋白修饰可引起PPP2R2B的表达下调,导致PP2A靶标p70S6K和4EBP1的持续磷酸化,进而介导对HER2靶向治疗的抑制作用。通过EZH2抑制剂对EZH2进行遗传学敲除或抑制可恢复PPP2R2B的表达,去除p70S6K和4EBP1的残留磷酸化,并使得HER2+乳腺癌细胞重新敏感于HER2靶向治疗。此外,相同的表观遗传学机制也对获得性耐药的产生具有贡献。

PPP2R2B在HER2靶向治疗敏感性中的作用模型

综上,这些研究结果显示,EZH2依赖性的PPP2R2B抑制作用是HER2靶向疗法耐药性的一种表观遗传调控,EZH2抑制剂也为减轻HER2靶向疗法耐药性提供了潜在的可能性。


原始出处:

Bao, Y., Oguz, G., Lee, W.C. et al. EZH2-mediated PP2A inactivation confers resistance to HER2-targeted breast cancer therapy. Nat Commun 11, 5878 (18 November 2020).

 

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    2021-06-25 liye789132251
  2. [GetPortalCommentsPageByObjectIdResponse(id=1884824, encodeId=3901188482468, content=<a href='/topic/show?id=3b2112532d8' target=_blank style='color:#2F92EE;'>#Nat#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=0, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=12532, encryptionId=3b2112532d8, topicName=Nat)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2e6f107, createdName=liye789132251, createdTime=Fri Jun 25 13:35:44 CST 2021, time=2021-06-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2087842, encodeId=00ac208e8425c, content=<a href='/topic/show?id=490750196b' target=_blank style='color:#2F92EE;'>#COMMUN#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=37, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=5019, encryptionId=490750196b, topicName=COMMUN)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=7931272, createdName=liuli5079, createdTime=Tue Apr 13 08:35:44 CST 2021, time=2021-04-13, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1746920, encodeId=27361e46920a3, content=<a href='/topic/show?id=5fefe188e3' target=_blank style='color:#2F92EE;'>#Ezh2#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=43, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=7188, encryptionId=5fefe188e3, topicName=Ezh2)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=d2a935872940, createdName=fusion, createdTime=Sun Oct 17 15:35:44 CST 2021, time=2021-10-17, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=903214, encodeId=4cc8903214bb, content=耐药了就麻烦了, beContent=null, objectType=article, channel=null, level=null, likeNumber=82, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20200914/f1df8506d5cb4909bac2efc340b6c1fe/dcc6dd2dbec44613838b555fbe723804.jpg, createdBy=686b1371609, createdName=liyu7822, createdTime=Sun Nov 29 09:32:45 CST 2020, time=2020-11-29, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=903207, encodeId=1a2f90320ed0, content=不错,很好, beContent=null, objectType=article, channel=null, level=null, likeNumber=79, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20201129/361e8d29e4ed4fdea2379126ea4ed66e/14f645e1dc4a426ea901acffd896920d.jpg, createdBy=faf54736825, createdName=15242b3561m, createdTime=Sun Nov 29 09:11:02 CST 2020, time=2020-11-29, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=903198, encodeId=60c39031982b, content=好文章,共享之, beContent=null, objectType=article, channel=null, level=null, likeNumber=74, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTJlfgys76DEiaNtbYo2re3ibjrUPTRibEXRyFwAB4aAGiave842S0FQDf0wAoaH226NiaSoPPDzhndsf1g/132, createdBy=88b489038, createdName=yangchou, createdTime=Sun Nov 29 07:43:31 CST 2020, time=2020-11-29, status=1, ipAttribution=)]
    2021-04-13 liuli5079
  3. [GetPortalCommentsPageByObjectIdResponse(id=1884824, encodeId=3901188482468, content=<a href='/topic/show?id=3b2112532d8' target=_blank style='color:#2F92EE;'>#Nat#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=0, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=12532, encryptionId=3b2112532d8, topicName=Nat)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2e6f107, createdName=liye789132251, createdTime=Fri Jun 25 13:35:44 CST 2021, time=2021-06-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2087842, encodeId=00ac208e8425c, content=<a href='/topic/show?id=490750196b' target=_blank style='color:#2F92EE;'>#COMMUN#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=37, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=5019, encryptionId=490750196b, topicName=COMMUN)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=7931272, createdName=liuli5079, createdTime=Tue Apr 13 08:35:44 CST 2021, time=2021-04-13, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1746920, encodeId=27361e46920a3, content=<a href='/topic/show?id=5fefe188e3' target=_blank style='color:#2F92EE;'>#Ezh2#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=43, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=7188, encryptionId=5fefe188e3, topicName=Ezh2)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=d2a935872940, createdName=fusion, createdTime=Sun Oct 17 15:35:44 CST 2021, time=2021-10-17, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=903214, encodeId=4cc8903214bb, content=耐药了就麻烦了, beContent=null, objectType=article, channel=null, level=null, likeNumber=82, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20200914/f1df8506d5cb4909bac2efc340b6c1fe/dcc6dd2dbec44613838b555fbe723804.jpg, createdBy=686b1371609, createdName=liyu7822, createdTime=Sun Nov 29 09:32:45 CST 2020, time=2020-11-29, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=903207, encodeId=1a2f90320ed0, content=不错,很好, beContent=null, objectType=article, channel=null, level=null, likeNumber=79, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20201129/361e8d29e4ed4fdea2379126ea4ed66e/14f645e1dc4a426ea901acffd896920d.jpg, createdBy=faf54736825, createdName=15242b3561m, createdTime=Sun Nov 29 09:11:02 CST 2020, time=2020-11-29, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=903198, encodeId=60c39031982b, content=好文章,共享之, beContent=null, objectType=article, channel=null, level=null, likeNumber=74, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTJlfgys76DEiaNtbYo2re3ibjrUPTRibEXRyFwAB4aAGiave842S0FQDf0wAoaH226NiaSoPPDzhndsf1g/132, createdBy=88b489038, createdName=yangchou, createdTime=Sun Nov 29 07:43:31 CST 2020, time=2020-11-29, status=1, ipAttribution=)]
    2021-10-17 fusion
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    2020-11-29 liyu7822

    耐药了就麻烦了

    0

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    2020-11-29 15242b3561m

    不错,很好

    0

  6. [GetPortalCommentsPageByObjectIdResponse(id=1884824, encodeId=3901188482468, content=<a href='/topic/show?id=3b2112532d8' target=_blank style='color:#2F92EE;'>#Nat#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=0, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=12532, encryptionId=3b2112532d8, topicName=Nat)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2e6f107, createdName=liye789132251, createdTime=Fri Jun 25 13:35:44 CST 2021, time=2021-06-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2087842, encodeId=00ac208e8425c, content=<a href='/topic/show?id=490750196b' target=_blank style='color:#2F92EE;'>#COMMUN#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=37, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=5019, encryptionId=490750196b, topicName=COMMUN)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=7931272, createdName=liuli5079, createdTime=Tue Apr 13 08:35:44 CST 2021, time=2021-04-13, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1746920, encodeId=27361e46920a3, content=<a href='/topic/show?id=5fefe188e3' target=_blank style='color:#2F92EE;'>#Ezh2#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=43, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=7188, encryptionId=5fefe188e3, topicName=Ezh2)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=d2a935872940, createdName=fusion, createdTime=Sun Oct 17 15:35:44 CST 2021, time=2021-10-17, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=903214, encodeId=4cc8903214bb, content=耐药了就麻烦了, beContent=null, objectType=article, channel=null, level=null, likeNumber=82, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20200914/f1df8506d5cb4909bac2efc340b6c1fe/dcc6dd2dbec44613838b555fbe723804.jpg, createdBy=686b1371609, createdName=liyu7822, createdTime=Sun Nov 29 09:32:45 CST 2020, time=2020-11-29, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=903207, encodeId=1a2f90320ed0, content=不错,很好, beContent=null, objectType=article, channel=null, level=null, likeNumber=79, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20201129/361e8d29e4ed4fdea2379126ea4ed66e/14f645e1dc4a426ea901acffd896920d.jpg, createdBy=faf54736825, createdName=15242b3561m, createdTime=Sun Nov 29 09:11:02 CST 2020, time=2020-11-29, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=903198, encodeId=60c39031982b, content=好文章,共享之, beContent=null, objectType=article, channel=null, level=null, likeNumber=74, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTJlfgys76DEiaNtbYo2re3ibjrUPTRibEXRyFwAB4aAGiave842S0FQDf0wAoaH226NiaSoPPDzhndsf1g/132, createdBy=88b489038, createdName=yangchou, createdTime=Sun Nov 29 07:43:31 CST 2020, time=2020-11-29, status=1, ipAttribution=)]
    2020-11-29 yangchou

    好文章,共享之

    0

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