将iPSCs定向分化为类似肝细胞的细胞的转录形状
Irina Panchuk1, Valeriia Kovalskaia1, Konstantin Kochergin-Nikitsky1
1Research Centre for Medical Genetics, Moskvorechye Str., 1, Moscow 115478, Russia.
International journal of molecular sciences
|January 28, 2026
概括
这项研究比较了从干细胞中获得的2D和3D肝脏模型. 三维有机体表现出增强的肝脏基因表达,但保留胎儿特征,并具有有限的代谢功能.
科学领域:
- 干细胞生物学 干细胞生物学
- 肝病学 肝病学是一种肝病学.
- 基因组学就是基因组学.
背景情况:
- 目前对肝病的实验模型有局限性,包括动物模型无法预测人类生理学和初级肝细胞在培养中脱差.
- 诱导多能干细胞 (iPSCs) 为生成患者特异性肝脏模型提供了一个有希望的替代方案.
- 标准化和可复制的体外模型对于推动肝病研究和药物开发至关重要.
研究的目的:
- 在2D和3D培养条件下,从iPSC区分出来的肝细胞样细胞 (HLC) 的转录组概况进行全面比较.
- 在两个培养系统中评估HLC的发育阶段和成熟程度.
- 为标准化体外肝脏模型建立定量基准,并确定未来优化的局限性.
主要方法:
- 使用iPSC衍生的HLCs的RNA测序进行全面的转录基因分析.
- 在2D和3D文化之间的基因表达模式的比较分析,跨越发育阶段.
- 评估血统特定标记物激活 (最终内皮,后部前肠,肝细胞) 和成熟的肝细胞标记物.
- 评估跨多个iPSC线路的可复制性,包括来自遗传疾病患者的线路.
主要成果:
- RNA测序揭示了二维和三维培养中关键发育标记物的顺序激活.
- 3D有机体显示肝脏基因表达显著增强,HNF4A增加了33倍,成熟肝细胞标志物升高.
- 尽管肝脏标志物增强,3D培养保留了胎儿特征 (290倍高的AFP) 并显示代谢功能受损 (2000倍低于成人肝脏的CYP3A4).
- 在3D培养和成人肝脏组织之间观察到中度相关性 (ρ = 0.57),表明部分成熟.
- 在五个不同的iPSC系列中实现了高可重复性.
结论:
- 与二维培养相比,三维有机体培养增强了肝脏基因表达,但不能完全回顾成人的肝脏代谢功能.
- 目前的iPSC衍生肝脏模型在实现完全代谢成熟和P450酶活性方面存在局限性.
- 定量转录基因基准为标准化体外肝脏模型提供了有价值的工具.
- 需要进一步优化协议,以提高这些模型的代谢成熟度和功能能力,用于疾病建模和药物查.
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