Gut:肝Reptin/RUVBL2通过调控mTORC1和mTORC2信号通路调节糖脂肪代谢

2017-11-23 MedSci MedSci原创

抑制Reptin的表达或活性可能是代谢综合征新的治疗前景。

研究背景:Reptin在肝细胞肿瘤中大量表达,临床前研究表明,这可能是一个相关的治疗目标。然而,它在体内的生理和病理生理作用尚不清楚。本研究旨在确定Reptin在哺乳动物成人肝脏中的作用。

研究方法和结果:研究使用肝脏特异的Reptin基因敲除小鼠模型(RepinLKO)。Reptin功能失效后,小鼠体重和脂肪含量降低,低血糖,低血脂。这与mTOR蛋白含量下降有关。研究进一步在原代肝细胞中进行,研究表明,Reptin通过调节ATP酶活性,维持mTOR蛋白水平。出乎意料地是,Reptin功能丧失或者功能被抑制,在mTORC1 and mTORC2信号通路上产生了相反的作用:(1) 强烈抑制肝脏mTORC1活性,肝细胞体积减少,脂肪从头合成减少,胆固醇转录减少 (2) 增强mTORC2活性与葡萄糖转录抑制和肝脏葡萄糖产生减少有关。因此,Reptin在胰岛素抵抗(IR)和非酒精性脂肪肝病中发挥作用。Reptin完全缺失挽救了与IR相关的病理表型,包括葡萄糖耐受、高血糖、高脂血症和肝脂肪变性。

研究结论:抑制Reptin的表达或活性可能是代谢综合征新的治疗前景。

原始出处:

Javary J, Allain-Courtois N, Saucisse N, et al. Liver Reptin/RUVBL2 controls glucose and lipid metabolism with opposite actions on mTORC1 and mTORC2 signalling. Gut, 2017, Oct 26. pii: gutjnl-2017-314208. doi: 10.1136/gutjnl-2017-314208.

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    2017-11-25 cscdliu

    文章很好.学习了

    0

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    2017-11-25 雕雕
  3. [GetPortalCommentsPageByObjectIdResponse(id=264281, encodeId=a37a264281c4, content=文章很好.学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=64, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://cdnapi.center.medsci.cn/medsci/head/2017/10/23/557c1f19aaf5459a8405411e38903c4b.jpg, createdBy=dfc02088287, createdName=cscdliu, createdTime=Sat Nov 25 21:15:31 CST 2017, time=2017-11-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1418394, encodeId=8a181418394df, content=<a href='/topic/show?id=2cc91232947' target=_blank style='color:#2F92EE;'>#mTORC1#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=39, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=12329, encryptionId=2cc91232947, topicName=mTORC1)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=59413348493, createdName=雕雕, createdTime=Sat Nov 25 13:21:00 CST 2017, time=2017-11-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1539634, encodeId=3647153963483, content=<a href='/topic/show?id=c61a2e315da' target=_blank style='color:#2F92EE;'>#信号通路#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=0, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=27315, encryptionId=c61a2e315da, topicName=信号通路)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=4dfa37, createdName=智者为医08, createdTime=Sat Nov 25 13:21:00 CST 2017, time=2017-11-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1628761, encodeId=b1f31628e615f, content=<a href='/topic/show?id=02bd84324c4' target=_blank style='color:#2F92EE;'>#脂肪代谢#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=84324, encryptionId=02bd84324c4, topicName=脂肪代谢)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=d77721191523, createdName=zhangph, createdTime=Sat Nov 25 13:21:00 CST 2017, time=2017-11-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=264108, encodeId=908b2641084f, content=谢谢分享!, beContent=null, objectType=article, channel=null, level=null, likeNumber=55, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=7c592194322, createdName=1209e435m98(暂无昵称), createdTime=Sat Nov 25 07:21:46 CST 2017, time=2017-11-25, status=1, ipAttribution=)]
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    2017-11-25 1209e435m98(暂无昵称)

    谢谢分享!

    0

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