为了通过ChREBP激活Tkfc促进体,需要HNF4α
Rena Tsukamoto1, Kyoko Watanabe1, Manami Kodaka1
1D epartment of Agricultural Chemistry, Faculty of Applied Biosciences, Tokyo University of Agriculture, Tokyo, Japan.
Bioscience, biotechnology, and biochemistry
|May 23, 2024
概括
重新养会增加肝脏中的三酶/FMN循环酶 (Tkfc) 基因表达. 肝细胞核因子4α (HNF4α) 和碳水化合物敏感元素结合蛋白 (ChREBP) 调节Tkfc,与ChREBP一起.
科学领域:
- 代谢调节 代谢调节 代谢调节
- 基因表达 基因表达 基因表达
- 分子生物学分子生物学
背景情况:
- 三酶/FMN循环酶 (Tkfc) 对于果糖代谢至关重要,化糖.
- 在小鼠中,肝Tkfc表达是由重新养诱导的.
- 了解Tkfc调节是理解果糖代谢的关键.
研究的目的:
- 为了研究Tkfc基因的转录调节.
- 确定肝细胞核因子4α (HNF4α) 和碳水化合物敏感元素结合蛋白 (ChREBP) 在Tkfc调节中的作用.
主要方法:
- 路西法酶记者基因测定与Tkfc促销器构造.
- 假定转录因子结合位点 (HNF4RE1,HNF4RE2,ChoRE1) 的位点导向突变发生.
- 在淘汰赛小鼠模型 (ChREBP-/- 和 Hnf4αΔHep) 中对HNF4α的淘汰和Tkfc表达的分析.
主要成果:
- 该Tkfc促进体含有HNF4α和ChREBP响应元素.
- HNF4α和ChREBP协同激活Tkfc促进体活性.
- 通过ChREBP介导的激活需要HNF4α;通过HNF4α介导的激活部分依赖于ChREBP.
- 在ChREBP-/-和Hnf4αΔHep小鼠中,Tkfc表达减少.
结论:
- Tkfc是肝脏中HNF4α和ChREBP的直接点基因.
- 对于ChREBP来说,HNF4α对于有效刺激Tkfc促进剂活性至关重要.
- 这项研究阐明了果糖代谢中的关键调节机制.
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