Gene Dev:新研究发现了白色脂肪“棕色变”的关键

2016-12-11 MedSci MedSci原创

近日,来自宾夕法尼亚大学的研究人员发现了将白色脂肪转变成棕色脂肪的关键,其研究结果已发表在Genes and Development。 研究人员发现了一种信号通路,可激活白色脂肪细胞中的“褐变”,使得白色脂肪像褐色脂肪一样易于消耗。 研究人员利用基因工程小鼠——删除了白色脂肪细胞中的一个基因foliculin(FLCN),FLCN是一种肿瘤抑制基因。 一旦这种基因被删除,一种称为

近日,来自宾夕法尼亚大学的研究人员发现了将白色脂肪转变成棕色脂肪的关键,其研究结果已发表在Genes and Development

研究人员发现了一种信号通路,可激活白色脂肪细胞中的“褐变”,使得白色脂肪像褐色脂肪一样易于消耗。

研究人员利用基因工程小鼠——删除了白色脂肪细胞中的一个基因foliculin(FLCN),FLCN是一种肿瘤抑制基因。

一旦这种基因被删除,一种称为TFE3的蛋白便能够进入细胞的细胞核。然后,TFE3会结合到DNA中,由此可激活PGC-1β。PGC-1β在细胞代谢中起着关键的作用。

这个过程会激活一组基因,将白色脂肪“棕色变”。

通常情况下,这个过程并不会发生,由于FCLN 和 mTOR基因的存在, TFE3蛋白无法进入到细胞核。mTOR是细胞中的一个重要的信号转导中心。

当研究人员删除了小鼠中的FLCN后,发现白色脂肪细胞变成棕色脂肪细胞。

其中一个原因是,细胞开始产生更多的线粒体。在棕色脂肪细胞中,线粒体将能量转化为热能。

在其他方面,白脂肪细胞也变得更像棕色细胞。

删除该基因改变了细胞的结构,提高了线粒体的耗氧能力,且改变了基因的表达模式。

研究人员希望,基于此发现未来可找到一种新的治疗方法,以减少肥胖,并预防糖尿病。但是目前为止,研究人员尚未能解开这背后的机制,未来仍需进一步的深入研究。

原始出处:

[1] Yvette Brazier. Could turning white fat to brown hold key to new obesity treatment? MNT, 10 December 2016.

[2] Shogo Wada et al., The tumor suppressor FLCN mediates an alternate mTOR pathway to regulate browning of adipose tissue. Genes Development. 2 December 2016.


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    2017-02-07 fzwish20000
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    2017-10-30 cy0324
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    2016-12-20 李东泽

    很好,不错,以后会多学习

    0

  6. [GetPortalCommentsPageByObjectIdResponse(id=1982236, encodeId=983819822368b, content=<a href='/topic/show?id=13b658e849' target=_blank style='color:#2F92EE;'>#Dev#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=39, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=5878, encryptionId=13b658e849, topicName=Dev)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=bcaa382, createdName=fzwish20000, createdTime=Tue Feb 07 13:58:00 CST 2017, time=2017-02-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2048748, encodeId=9e5b2048e48ed, content=<a href='/topic/show?id=4363e929ad' target=_blank style='color:#2F92EE;'>#Gene#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=39, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=7929, encryptionId=4363e929ad, topicName=Gene)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=63a4277, createdName=cy0324, createdTime=Mon Oct 30 14:58:00 CST 2017, time=2017-10-30, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1756232, encodeId=55ff1e562328b, content=<a href='/topic/show?id=1303e175932' target=_blank style='color:#2F92EE;'>#白色脂肪#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=44, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=71759, encryptionId=1303e175932, topicName=白色脂肪)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=017537082563, createdName=liuyg0240, createdTime=Fri Apr 21 18:58:00 CST 2017, time=2017-04-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1753169, encodeId=3b441e5316903, content=<a href='/topic/show?id=6a57e33772b' target=_blank style='color:#2F92EE;'>#研究发现#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=31, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=73377, encryptionId=6a57e33772b, topicName=研究发现)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=7e1736602208, createdName=hanhaisha2020, createdTime=Sat Jul 15 15:58:00 CST 2017, time=2017-07-15, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=164330, encodeId=ce8d164330f9, content=很好,不错,以后会多学习, beContent=null, objectType=article, channel=null, level=null, likeNumber=69, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/jW482SpianMayicTRbRZ5RzUn81b5CF5ibVPib8jWI92iciaxmqGHlwruOnK4SVZykd4iahqo1hicklIibyZoxm55X7EM8BW9eX1h1hQ2/0, createdBy=8aa81937526, createdName=李东泽, createdTime=Tue Dec 20 10:10:50 CST 2016, time=2016-12-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=162165, encodeId=8f18162165bd, content=支持一下, beContent=null, objectType=article, channel=null, level=null, likeNumber=53, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=90f31612316, createdName=xiaotaiyang1, createdTime=Mon Dec 12 11:57:58 CST 2016, time=2016-12-12, status=1, ipAttribution=)]
    2016-12-12 xiaotaiyang1

    支持一下

    0

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