利用人多能干细胞衍生的肝细胞样类器官构建肝脏再生的研究模型  

Constructing a research model for liver regeneration by using hepatocyte-like organoid derived from human pluripotent stem cells

作　　者：王晨曦 杨淑春 贾玉艳 黄粤[1] WANG Chenxi;YANG Shuchun;JIA Yuyan;HUANG Yue(Department of Medical Genetics,State Key Laboratory of Common Mechanism Research for Major Diseases,Institute of Basic Medical Sciences CAMS,School of Basic Medicine PUMC,Beijing 100005,China)

机构地区：[1]中国医学科学院基础医学研究所,北京协和医学院基础学院,医学遗传学系,重大疾病共性机制研究全国重点实验室,北京100005

出　　处：《基础医学与临床》2025年第5期589-598,共10页Basic and Clinical Medicine

基　　金：国家自然科学基金(32370898)。

摘　　要：目的基于人多能干细胞(hPSCs)衍生的肝细胞样类器官(HLO)构建良好的人类肝脏再生的体外研究模型。方法逐级诱导分化得到hPSCs衍生的HLO,通过定点在HLO培养条件中添加或撤离对乙酰氨基酚(APAP)模拟急性肝损伤,构建基于HLO的肝损伤后再生模型。随后,利用CRISPR/Cas9基因编辑技术构建调控肝再生的关键基因连环蛋白/钙粘蛋白相关蛋白β1基因CTNNB1敲除的HLO,并进行APAP损伤再生实验。通过形态学观察、RT-qPCR、Western blot以及病理学分析进一步评估HLO作为肝再生研究模型的可用性。结果通过形态学观察以及标记基因的表达量检测,结果显示hPSCs衍生的HLO在APAP药物处理后能启动其损伤后的再生反应,并且,CTNNB1缺失的HLO相比对照组HLO,在损伤后再生过程中其尺寸恢复延迟、相关基因表达量下调或延后表达。结论本研究构建了一种基于hPSCs衍生的HLO人类肝脏再生模型,该模型可能成为开展肝再生过程中基因功能研究的工具。Objective To construct an in vitro research model for studying human liver regeneration based on human pluripotent stem cells(hPSCs)-derived hepatocyte-like organoid(HLO).Methods The hPSCs-derived HLO was obtained by inducing differentiation and the regeneration model after liver injury was constructed by adding acetaminophen(APAP)at fixed time points in HLO culture conditions to simulate acute liver injury.Subsequently,HLO with catenin/cadherin-associated protein beta 1(CTNNB1)knockout,a key gene regulating liver regeneration,was constructed using CRISPR/Cas9 gene editing technology,and regeneration experiments with APAP injury were performed.HLO as a model for liver regeneration studies was further evaluated by morphological observation,RT-qPCR,Western blot and pathological analysis.Results Morphology evidence as well as expres-sion of marker genes showed that hPSCs-derived HLO was able to initiate a post-injury regeneration response after APAP treatment.CTNNB1-deficient HLO showed delayed recovery in dimension and down-regulated or delayed expression of related genes during post-injury regeneration as compared to control HLO.Conclusions A HLO-based hPSCs-derived human liver regeneration model is successfully constructed,which can be used for gene function studies during liver regeneration.

关 键 词：肝脏再生 肝细胞样类器官 CRISPR/Cas9 人多能干细胞 

分 类 号：Q28[生物学—细胞生物学]