相关实验视频
Updated: Jun 25, 2025

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Cell Type-specific Gene Expression Profiling in the Mouse Liver
Published on: September 17, 2019
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通过HNF4alpha调节肝脏的外传感器功能
Manasi Kotulkar1, Diego Paine-Cabrera1, Dakota R Robarts1
1Department of Pharmacology, Toxicology, and Therapeutics, University of Kansas Medical Center, Kansas City, KS 66160, United States.
概括
肝细胞核因子4alpha (HNF4α) 对于肝脏关键外传感器的功能至关重要,包括CAR,PXR和PPARα. 它的缺失会破坏这些传感器的激活,影响毒理反应.
科学领域:
- 肝病学 肝病学是一种肝病学.
- 毒理学 毒理学 毒理学
- 分子生物学分子生物学
背景情况:
- 核受体和转录因子,如CAR,PXR,PPARα和AhR,在肝脏中起到关键的异生物传感器的作用.
- 肝细胞核因子4alpha (HNF4α) 是维持肝功能必不可少的孤儿核受体.
研究的目的:
- 调查HNF4α对主要肝脏外传感器的功能至关重要的假设.
- 确定HNF4α在AhR,CAR,PXR和PPARα的激活和反应中的作用.
主要方法:
- 使用了野生型 (WT) 和肝细胞特异性的Hnf4a无 (HNF4α-KO) 鼠标.
- 对AhR (TCDD),CAR (TCPOBOP),PXR (PCN) 和PPARα (WY-14643) 进行的特定激动剂.
- 收集血液和肝脏组织以分析受体激活,肝对体重量比 (LW/BW),以及向基因表达.
主要成果:
- 通过TCDD激活AhR不受HNF4α缺乏的影响.
- 通过增加LW/BW比率和向基因表达来表明CAR,PXR和PPARα激活,与WT小鼠相比,在HNF4α-KO小鼠中显著受损.
- 虽然PCN在HNF4α-KO小鼠中增加了LW/BW比,但它未能诱导PXR标基因,这表明部分破坏.
结论:
- HNF4α对于肝脏CAR,PXR和PPARα外传感器的功能激活至关重要.
- 作为外传感器的AhR的功能是独立于HNF4α的.
- HNF4α在通过外传感器激活来调解肝脏毒理反应方面发挥着至关重要的作用.
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