HLH-11 modulates lipid metabolism in response to nutrient availability.

HLH-11 modulates lipid metabolism in response to nutrient availability.
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HLH-11 根据营养可用性调节脂质代谢

DOI:
10.1038/s41467-020-19754-1
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发表时间:
2020-11-24
影响因子:
16.6
通讯作者:
Liu Y
Liu Y
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Li Y;Ding W;Li CY;Liu Y

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生物体感知养分供应并调整其代谢状态以承受养分缺乏的能力对于生存至关重要。为了鉴定以前未知的将营养缺乏与体脂利用相结合的调节因子,我们在C. elegansand发现转录因子HLH-11调节脂质代谢以响应食物的可获得性。在喂养良好的蠕虫中,HLH-11抑制脂质catalysts基因的转录。禁食后,HLH-11蛋白水平通过溶酶体和蛋白酶体介导的降解降低,从而减轻HLH-11的抑制作用,激活脂质catalysts基因的转录,并利用脂肪。此外,脂质分析显示,HLH-11蛋白水平的降低重塑了C中的脂质景观。优美的此外,TFAP 4,HLH-11的哺乳动物同源物,在响应饥饿调节脂质代谢中起着进化上保守的作用。因此,TFAP 4可能代表脂质储存障碍的潜在治疗靶点。
The ability of organisms to sense nutrient availability and tailor their metabolic states to withstand nutrient deficiency is critical for survival. To identify previously unknown regulators that couple nutrient deficiency to body fat utilization, we performed a cherry-picked RNAi screen inC. elegansand found that the transcription factor HLH-11 regulates lipid metabolism in response to food availability. In well-fed worms, HLH-11 suppresses transcription of lipid catabolism genes. Upon fasting, the HLH-11 protein level is reduced through lysosome- and proteasome-mediated degradation, thus alleviating the inhibitory effect of HLH-11, activating the transcription of lipid catabolism genes, and utilizing fat. Additionally, lipid profiling revealed that reduction in the HLH-11 protein level remodels the lipid landscape inC. elegans. Moreover, TFAP4, the mammalian homolog of HLH-11, plays an evolutionarily conserved role in regulating lipid metabolism in response to starvation. Thus, TFAP4 may represent a potential therapeutic target for lipid storage disorders.
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