Cell Stem Cell:人体肝细胞扩增突破10000倍!

2018-11-25 小通 生物通

研究人员建立了一整套全新的人肝细胞体外培养系统,将之前不能培养人原代肝细胞实现了体外高达10000倍的扩增。

研究人员建立了一整套全新的人肝细胞体外培养系统,将之前不能培养人原代肝细胞实现了体外高达10000倍的扩增。



肝脏疾病严重威胁人类的生命健康。目前对于终末期肝脏疾病和急性肝衰竭最有效的治疗手段是原位肝器官移植,鉴于供体肝源的短缺和昂贵的治疗费用,细胞治疗和干细胞技术促使研究者逐渐尝试使用人原代肝细胞与类肝细胞替代肝器官移植治疗肝脏疾病。然而,体外培养人原代肝细胞极其困难,一直都是领域里想要突破的难题。

来自同济大学医学院、中国科学院上海生化和细胞研究所的研究人员发表了题为“In vitro expansion of primary human hepatocytes with efficient liver repopulation capacity”的文章,建立了一整套全新的人肝细胞体外培养系统,将之前不能培养人原代肝细胞实现了体外高达10000倍的扩增,有效地解决了人肝实质细胞的来源问题,将为体外肝脏疾病的模型构建和药物筛选提供了理想的研究系统。

这一研究成果公布在Cell Stem Cell杂志上,由同济大学医学院彭鲁英研究组与上海生化和细胞研究所惠利健研究组合作完成,文章的一作为张坤和张鲁狄博士。

主要创新点包括:

1、建立了一整套全新的人肝细胞体外培养系统,将之前不能培养人原代肝细胞实现了体外高达10000倍的扩增,并且检测了不同种族、性别、年龄的多个个体在该培养系统中都表现出比较相似的增殖能力,这将为肝细胞的临床治疗提供了充足的细胞来源;

2、该系统培养出的增殖的人肝细胞(ProliHH,proliferating human hepatocytes )依然保留了部分肝功能基因的表达和维持了部分肝细胞功能,处于共同表达肝功能基因和肝前体基因的双表型的状态。相对于肝前体细胞,ProliHH在体内外的功能表现更像人原代肝细胞;

3、利用3D培养的方式建立一套新型的肝向诱导系统, 使ProliHH能够在体外快速成熟,为体外研究药物代谢以及嗜肝性病毒感染等方向的研究者提供了一个非常稳定的人肝细胞研究系统;

4、最为关键的发现是将ProliHH移植到免疫缺陷的Fah敲除小鼠肝脏,这些细胞表现出近似人原代肝细胞在体内整合再殖的能力,并能分泌高达毫克级的人白蛋白并显示出人特异的药物代谢能力;移植的ProliHH在降低小鼠肝损伤和提高小鼠生存率等方面表现出与原代肝细胞非常相似的救治效果。

这项研究工作有效地解决了人肝实质细胞的来源问题,将为体外肝脏疾病的模型构建和药物筛选提供了理想的研究系统,并为肝细胞移植治疗奠定了坚实的基础。

原始出处:KunZhang, Ludi Zhang, Wenming Liu, et al. In Vitro Expansion of Primary Human Hepatocytes with Efficient Liver Repopulation Capacity. Cell Stem Cell. 8 November 2018

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    2019-05-19 xjy02
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    2019-07-02 维他命
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    2018-11-28 kafei

    学习了谢谢

    0

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