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PlOS BIO:脂肪代谢物调节肽供给信号

2017-03-30 MedSci MedSci原创

作为能量储存的主要场所,脂肪组织必须以某种方式监测能量储备,并将此信息传达给大脑。脂肪是动物体内主要的长期能量储存分子,脂肪水平的控制是生存的关键。

近日,来自韩国先进科学与技术研究院的研究人员报道了一项关于脂肪细胞信号通路研究的研究,相关研究成果刊登于国际杂志PlOS BIO上。

作为能量储存的主要场所,脂肪组织必须以某种方式监测能量储备,并将此信息传达给大脑。脂肪是动物体内主要的长期能量储存分子,脂肪水平的控制是生存的关键。

研究人员找到了一个异常表达的miRNA,名叫miR-iab-4。它的靶基因叫purple,是一个肥胖基因。它们俩合作能让机体多摄入27%的食物。下调purple的表达能够增强进食行为,证明正常情况下这个基因应该是受抑制的。Purple编码两种脂肪体酶中的其中一种,PTP,它存在于脂肪体和大脑回路。在脂肪体酶的作用下能够被转化成BH4(一种辅酶因子),BH4能够帮助神经元生产NPF(一种摄食相关神经肽)。Jones课题组将脂肪体内的purple缺失后,神经元内的BH4下降,NPF减少,摄食行为受到了抑制。反过来,增加神经元内的BH4NPF被释放,摄食量增多。研究发现,低卡路里的饮食结构会抑制脂肪体内控制BH4产量的酶类表达,从而导致摄食增加。

研究表明,BH4是抑制果蝇食欲的关键因素。而脂肪体释放的PTP则是脂肪细胞向大脑传递饱和的分子信号。

原始出处:

Do-Hyoung Kim , Minjung Shin , Sung-Hwan Jung. et al. A fat-derived metabolite regulates a peptidergic feeding circuit in Drosophila. PlOS BIO.March 28, 2017.http://dx.doi.org/10.1371/journal.pbio.2000532

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    2018-01-24 sunylz
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    2017-04-01 虈亣靌

    希望将来能更好!!

    0

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    2017-03-31 ylzr123

    反复实践,反复学习,认真推敲,不断提高自己的业务水平。

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