Blood:Myc-Miz-1信号通过抑制Cebpα和Cebpδ表达促进白血病干细胞自我更新

2020-02-11 QQY MedSci原创

中心点:Myc通过Miz1介导的反抑制活性调节白血病干细胞的自我更新。Myc通过抑制Cebpα和Cebpδ的表达发挥这样的作用。摘要:在大多数急性髓系白血病(AML)中,c-Myc(以下简称Myc)多异常表达和/或扩增。几乎所有的AML细胞的增殖和存活都依赖于Myc。因此,Myc被认为是重要的抗AML靶点。Myc具有Max介导的反式激活和Miz1介导的反式抑制活性。在AML发病机制中Myc-Max

中心点:

Myc通过Miz1介导的反抑制活性调节白血病干细胞的自我更新。

Myc通过抑制Cebpα和Cebpδ的表达发挥这样的作用。

摘要:

在大多数急性髓系白血病(AML)中,c-Myc(以下简称Myc)多异常表达和/或扩增。几乎所有的AML细胞的增殖和存活都依赖于Myc。因此,Myc被认为是重要的抗AML靶点。Myc具有Max介导的反式激活和Miz1介导的反式抑制活性。在AML发病机制中Myc-Max介导的反式激活的作用已被深入研究;然而,Myc -Miz1介导的反式抑制作用尚不明确。

MycV394D是Myc的一种突变形式,由于其缺乏与Miz1相互作用的能力而缺乏反抑制活性。研究人员发现,与Myc相比,MycV394D的致瘤功能明显受损。与接受Myc转导造血干细胞(HSPCs)的小鼠相比,在接受MycV394D转导HSPCs的小鼠发生的AML/骨髓增生性疾病的时间明显延迟。

通过MLL-AF9 AML小鼠模型,研究人员发现表达MycV394D(耗竭内源性Myc)的AML细胞部分分化,在体外集落形成能力和体内白血病形成能力均有所下降。白血病干细胞(LSCs)在MycV394D-AML细胞中的比例减少,在连续移植过程中产生白血病的能力降低,提示Myc-Miz1的相互作用是LSCs自我更新所必需的。

此外,研究人员还发现MycV394D-AML细胞比Myc-AML细胞对化疗更敏感。

在机制上,Myc通过维持LSCs的未分化状态和自我更新能力来抑制Miz1介导的Cebpα和Cebpδ表达,从而在AML的发病机制中发挥重要作用。

原始出处:

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    2020-06-27 changfy
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    2020-02-14 独孤立克

    干细胞是热点,但是进入临床仍然需要时间和临床疗效验证哦

    0

  6. [GetPortalCommentsPageByObjectIdResponse(id=1659322, encodeId=54141659322ea, content=<a href='/topic/show?id=7287861e2ed' target=_blank style='color:#2F92EE;'>#自我更新#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=38, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=86172, encryptionId=7287861e2ed, topicName=自我更新)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=764624964499, createdName=xsm926, createdTime=Sun Oct 11 13:37:00 CST 2020, time=2020-10-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1782774, encodeId=15281e82774d3, content=<a href='/topic/show?id=f5db4443c8' target=_blank style='color:#2F92EE;'>#Cebpδ#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=31, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4443, encryptionId=f5db4443c8, topicName=Cebpδ)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=32d177, createdName=changfy, createdTime=Sat Jun 27 09:37:00 CST 2020, time=2020-06-27, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1805383, encodeId=04151805383e2, content=<a href='/topic/show?id=9d42e801133' target=_blank style='color:#2F92EE;'>#细胞自我更新#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=32, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=78011, encryptionId=9d42e801133, topicName=细胞自我更新)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c859411, createdName=hmwwww, createdTime=Tue Dec 08 07:37:00 CST 2020, time=2020-12-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1695505, encodeId=4bf81695505ba, content=<a href='/topic/show?id=0833e178149' target=_blank style='color:#2F92EE;'>#白血病干细胞#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=30, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=71781, encryptionId=0833e178149, topicName=白血病干细胞)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=945229811725, createdName=freve, createdTime=Mon Mar 02 06:37:00 CST 2020, time=2020-03-02, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1025396, encodeId=0c4e102539643, content=干细胞是热点,但是进入临床仍然需要时间和临床疗效验证哦, beContent=null, objectType=article, channel=null, level=null, likeNumber=47, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=独孤立克, createdTime=Fri Feb 14 22:37:00 CST 2020, time=2020-02-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1274828, encodeId=cce112e482886, content=<a href='/topic/show?id=1bbc12404ba' target=_blank style='color:#2F92EE;'>#MYC#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=12404, encryptionId=1bbc12404ba, topicName=MYC)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=66ec123, createdName=guihongzh, createdTime=Thu Feb 13 13:37:00 CST 2020, time=2020-02-13, status=1, ipAttribution=)]
    2020-02-13 guihongzh