CREB3L3 controls fatty acid oxidation and ketogenesis in synergy with PPARα.

CREB3L3 controls fatty acid oxidation and ketogenesis in synergy with PPARα.
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DOI:
10.1038/srep39182
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发表时间:
2016-12-16
期刊:
影响因子:
4.6
通讯作者:
Shimano H
Shimano H
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Nakagawa Y;Satoh A;Tezuka H;Han SI;Takei K;Iwasaki H;Yatoh S;Yahagi N;Suzuki H;Iwasaki Y;Sone H;Matsuzaka T;Yamada N;Shimano H

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CREB 3L 3以与PPARα相互作用的方式参与脂肪酸氧化和酮生成。为了评估相对贡献,研究了基因敲除小鼠和转基因小鼠的组合。在强调肝脏生酮能力的生酮饮食(KD)中,Creb 3l 3 −/−小鼠表现出与Ppara−/−小鼠相当的脂肪氧化和生酮基因表达减少。大多数基因在双敲除小鼠中被进一步抑制,表明肝脏CREB 3L 3的独立贡献。在禁食期间,生酮对CREB 3L 3的依赖程度低于Ppara−/−小鼠,这表明脂肪PPARα对Creb 3l 3 −/−小鼠中FFA和高脂血症供应的重要性。结论CREB 3L 3通过两条途径在肝脏对能量饥饿的适应中发挥重要作用:直接相关的基因调控和PPARα的自环激活。此外,由于KD喂养的Creb 3l 3 −/−小鼠表现出严重的脂肪肝,激活炎症,CREB 3L 3可能是NAFLD的治疗靶点。
CREB3L3 is involved in fatty acid oxidation and ketogenesis in a mutual manner with PPARα. To evaluate relative contribution, a combination of knockout and transgenic mice was investigated. On a ketogenic-diet (KD) that highlights capability of hepatic ketogenesis, Creb3l3−/− mice exhibited reduction of expression of genes for fatty oxidation and ketogenesis comparable to Ppara−/− mice. Most of the genes were further suppressed in double knockout mice indicating independent contribution of hepatic CREB3L3. During fasting, dependency of ketogenesis on CREB3L3 is lesser extents than Ppara−/− mice suggesting importance of adipose PPARα for supply of FFA and hyperlipidemia in Creb3l3−/− mice. In conclusion CREB3L3 plays a crucial role in hepatic adaptation to energy starvation via two pathways: direct related gene regulation and an auto-loop activation of PPARα. Furthermore, as KD-fed Creb3l3−/− mice exhibited severe fatty liver, activating inflammation, CREB3L3 could be a therapeutic target for NAFLD.
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