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Nature:研究揭示肝细胞再生新机制!

2017-08-26 枫丹白露 来宝网

国际研究协作首次证明胆管细胞(上皮胆管细胞)在肝脏再生中的作用。研究结果对再生医学和抗击肝病具有重要意义。该团队的发现已发表在“自然”杂志上。



【科学家们发现了一种新的肝细胞再生机制】国际研究协作首次证明胆管细胞(上皮胆管细胞)在肝脏再生中的作用。研究结果对再生医学和抗击肝病具有重要意义。该团队的发现已发表在“自然”杂志上。

肝脏是人体能够再生的少数器官之一。在由于创伤或慢性疾病导致肝损伤的情况下,负责所有基本肝功能的主要肝细胞 -能够通过分成新的肝细胞再生。肝脏再生的刺激是医学界和研究人员的一个急性问题,但这种机制的细节以及其他类型的肝细胞是否参与新肝细胞形成的过程尚不清楚。

一个国际科学家组织使用转基因小鼠作为测试对象;在这样做时,他们设法模拟人类常见的肝损伤。实验在两个独立的转基因小鼠模型上进行,其中有意减少肝细胞分裂的能力,以评估其他肝细胞对再生的贡献。结果显示,胆管上皮细胞 - 胆管细胞参与肝细胞再生。此外,科学家们认为来自胆管细胞的肝细胞再生潜力可能高于正常肝细胞。

Skoltech教授兼翻译医学中心副主任Yuri Kotelevtsev说:“一年多以前,我遇到了爱丁堡大学的同事,共同组建科学项目,在Victor Koteliansky教授的指导下,我们设法调整肝脏基因敲低的技术,这项技术已经知道了大约七年,但其在体内的应用需要很高的实验水平,而且仍然只能在几个学术实验室获得,事实证明,Stuart Forbes教授的实验室正在解决方案中的一个问题,其中的敲击可以快速证实胆管细胞在肝脏再生中的关键作用的假设,Skoltech和MIT的贡献是我们创建并提供脂质纳米粒子与siRNA,以阻断小鼠肝细胞中该基因表达的β1整联蛋白,并将其对获得的模型的表型的观察结果允许鉴定参与肝脏再生的胆管细胞。目前,在Forbes教授的领导下,苏格兰再生医学中心正在开始工作,目的是将自体胆管细胞分离并移植到肝硬化患者身上。我们现在正在继续与Forbes教授的实验室合作。我们正在测试新的靶基因,其阻断可以预防或稳定与纤维化和随后的肝硬化相关的过程。

原始出处:

Raven Alexander, Wei-Yu Lu, Tak Yung Man, et al. Cholangiocytes Act as Facultative Liver Stem Cells during Impaired Hepatocyte Regeneration. Nature 547, no. 7663 (July 20, 2017): 350–54. DOI: 10.1038/nature23015.

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    2017-11-11 xjy02
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    2018-06-25 liye789132251
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    2017-08-26 为你把脉

    还好还好哈几号聚

    0

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