在具有双 CYP 记者系统的 HepaRG 细胞中揭示动态肝细胞可塑性
Riku Asano1, Yohei Iizaka2, Makoto Kashima3
1Stem Cells & Reprogramming Laboratory, Department of Biology, Faculty of Science, Toho University, Chiba, Japan.
PloS one
|November 11, 2024
概括
肝炎RG细胞表现出显著的可塑性,在增殖,分化和非分化状态下具有独特的分子配置. 虽然Wnt信号影响细胞状态,但单独CYP3基因表达不足以标记HepaRG细胞分化.
科学领域:
- 肝细胞生物学和细胞可塑性研究.
- 药物发现和毒理学查模型.
- 细胞分化和脱分化的分子机制.
背景情况:
- 初级肝细胞在药物疗效和毒性研究中面临挑战,原因是批量变异性和有限的增殖.
- 肝细胞RG细胞为研究肝细胞可塑性提供了一种多功能模型,能够保持不分化的状态和分化.
- 了解HepaRG细胞可塑性对于改善它们在研究中的实用性至关重要.
研究的目的:
- 阐明导致HepaRG细胞可塑性的分子机制.
- 研究特定信号通路和抑制剂在HepaRG细胞分化和脱分化的作用.
- 描述不同状态的HepaRG细胞的转录组概况.
主要方法:
- 使用的CYP3A4G/7R HepaRG细胞与胎儿 (CYP3A7-DsRed) 和成人 (CYP3A4-GFP) 基因促进器的光记者进行了工程.
- 采用时间间隔成像来观察在增殖和分化过程中的基因表达动态.
- 使用抑制剂 (Y-27632,A-83-01,CHIR99021) 和细胞因子 (Wnt3a) 进行评估的脱差.
- 进行了转录基因分析,以比较增殖,分化和脱分化的细胞状态.
主要成果:
- 在增殖过程中观察到CYP3A7-DsRed表达和在HepaRG细胞分化过程中观察到CYP3A4-GFP激活.
- YAC抑制剂增加了CYP3A4-GFP的表达,而Wnt3a治疗增加了CYP3A7-DsRed的表达,这表明Wnt信号传递有不同的作用.
- 脱差异化HepaRG细胞在重新分化后显示出增强的CYP3A4活性.
- 转录基因分析揭示了增殖,分化和非分化状态的不同形状,非分化细胞在转录基因水平上与未分化细胞相似,但在记者基因表达上有所不同.
结论:
- 肝炎RG细胞具有强大的可塑性,在不同状态下具有独特的分子特征.
- Wnt信号通路在调节HepaRG细胞命运方面发挥着特定的作用.
- 单独的CYP3家族基因表达并不是对HepaRG细胞分化状态的明确标记.
- 这些发现突显了HepaRG细胞的动态性质,并为它们在研究模型中的使用提供了信息.
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