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Diabetes:DDB1介导的CRY1降解可促进FOXO1所驱动的肝源性糖异生。

2017-10-09 qinqiyun MedSci原创

在糖代谢过程中,通过泛素化调控目的蛋白降解是一个重要的过程。现研究人员发现DDB1-CUL4A泛素E3配体是一种新型代谢调控,可促进FOXO1驱动的肝源性糖异生。

在糖代谢过程中,通过泛素化调控目的蛋白降解是一个重要的过程。现研究人员发现DDB1-CUL4A泛素E3配体是一种新型代谢调控,可促进FOXO1驱动的肝源性糖异生。

特异性地敲除小鼠活体肝细胞的Ddb1会导致肝源性糖异生受损,但同时可保护高脂膳食的小鼠不患高糖血症。

缺乏Ddb1可下调FOXO1蛋白表达,减弱FOXO1驱动的糖异生反应。

研究人员还发现DDB1是通过降解一个已知的DDB1 E3配体的靶点——生理蛋白隐色素1(CRY1)来提高FOXO1蛋白的稳定性。

在Cry1耗尽的情况下,胰岛素不能降低核FOXO1的水平、抑制糖异生基因的表达。在小鼠肝脏Cry1缓慢耗竭则不仅会提高FOXO1蛋白的水平,还可增强肝源性糖异生。

综上所述,DDB1介导的CRY降解是胰岛素调控血糖稳定的一个重要靶点。

原始出处:

Xin Tong,et al.DDB1-Mediated CRY1 Degradation Promotes FOXO1-Driven Gluconeogenesis in Liver.Diabets 2017 Oct; 66(10): 2571-2582. https://doi.org/10.2337/db16-1600

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    2017-11-18 zhwj
  5. [GetPortalCommentsPageByObjectIdResponse(id=1664716, encodeId=eccd1664e16c1, content=<a href='/topic/show?id=0b27e6816d0' target=_blank style='color:#2F92EE;'>#糖异生#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=80, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=76816, encryptionId=0b27e6816d0, topicName=糖异生)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=271f25816039, createdName=ms1774076774505970, createdTime=Sun Aug 05 13:44:00 CST 2018, time=2018-08-05, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1901787, encodeId=a6e21901e87c4, content=<a href='/topic/show?id=c097591ed5' target=_blank style='color:#2F92EE;'>#Diabetes#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=78, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=5917, encryptionId=c097591ed5, topicName=Diabetes)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=0045169, createdName=木头人513, createdTime=Fri May 04 04:44:00 CST 2018, time=2018-05-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1638080, encodeId=20ef163808059, content=<a href='/topic/show?id=afda591646' target=_blank style='color:#2F92EE;'>#DIA#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=66, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=5916, encryptionId=afda591646, topicName=DIA)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=987022654425, createdName=ms9608593228839890, createdTime=Sun Feb 25 03:44:00 CST 2018, time=2018-02-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1784141, encodeId=4d6a1e8414178, content=<a href='/topic/show?id=4caf5e661f' target=_blank style='color:#2F92EE;'>#Ddb1#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=56, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=5766, encryptionId=4caf5e661f, topicName=Ddb1)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=a5d7367, createdName=zhwj, createdTime=Sat Nov 18 09:44:00 CST 2017, time=2017-11-18, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1760243, encodeId=43d91e60243ae, content=<a href='/topic/show?id=9bea33520d' target=_blank style='color:#2F92EE;'>#BET#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=58, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3352, encryptionId=9bea33520d, topicName=BET)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=9a1a37427546, createdName=ms5439512287675881, createdTime=Tue Dec 05 07:44:00 CST 2017, time=2017-12-05, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1533935, encodeId=08591533935f3, content=<a href='/topic/show?id=132ee62484' target=_blank style='color:#2F92EE;'>#FOXO1#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=74, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=7624, encryptionId=132ee62484, topicName=FOXO1)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=c82812497085, createdName=许安, createdTime=Wed Oct 11 07:44:00 CST 2017, time=2017-10-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=251557, encodeId=ed1e25155e72, content=henhao, beContent=null, objectType=article, channel=null, level=null, likeNumber=82, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/mStl88fu4NcXNhUvfhzd2VdicMnaLeK2Im5gKx4Ucxd8Bwu6S7RG0uILBFQx5HTW2bU4VricDYlQqN20ibASSMYAeGrZrrTpy2Q/0, createdBy=b0041939716, createdName=hhh678, createdTime=Mon Oct 09 18:28:32 CST 2017, time=2017-10-09, status=1, ipAttribution=)]
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    2017-10-11 许安
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    2017-10-09 hhh678

    henhao

    0

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