从人类多能干细胞中自组合生成多区域肝脏器官
Hasan Al Reza1,2, Connie Santangelo2,3, Abid Al Reza1
1Division of Developmental Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229-3039, USA.
bioRxiv : the preprint server for biology
|September 11, 2024
概括
研究人员创建了一个新的肝脏器官模型,模仿人类肝脏区域. 这一突破允许在体外更好地研究肝功能和疾病,改善患者的治疗结果.
科学领域:
- 肝病学和再生医学 肝病学和再生医学
- 干细胞生物学 干细胞生物学
- 有机物技术 有机物技术
背景情况:
- 独特的肝细胞亚群对于肝脏恒温和损伤反应至关重要.
- 在体外复制肝脏的区域结构一直是一个重大挑战.
- 众所周知,阿斯科巴酸盐和胆红素等生物活性分子会影响肝脏的区域化.
研究的目的:
- 开发一个自组装,区域特定的人类肝脏器官模型.
- 为了在体外评估肝脏区域极性和功能.
- 为了研究肝脏区域化背后的分子机制.
主要方法:
- 人类诱导的多能干细胞衍生的肝脏原始细胞的共同培养,富含 Askorbate 和 Bilirubin.
- 单核RNA测序以分析肝细胞分化轨迹.
- 表观遗传学和转录基因分析以确定关键的调节因素.
- 将有机体移植到免疫缺陷大鼠中,并用胆管结合.
主要成果:
- 有机体表现出特定区域的功能 (尿素循环,谷,谷酸盐合成).
- 单核RNA测序揭示了模仿周门,区域间和周中心肝细胞的分化.
- 区域特征是通过EP300与TET1或HIF1α的亚酸盐/白素依赖结合来调节的.
- 移植的有机体通过减少高氨血和高白血,改善了大鼠的生存率.
结论:
- 开发的有机体系统在体外成功地复制了人类肝脏的区分.
- 该模型提供了对肝脏发育和疾病机制的洞察.
- 这些发现突出了EP300,TET1和HIF1α作为肝脏区域认同的关键调节者.
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