Nat Cell Biol:再生医学进步空间宽广,肝衰竭患者存活希望增加

2015-07-22 MedSci MedSci原创

在 Nature Cell Biology杂志中,研究人员描述了他们将肝干细胞移植到肝脏严重受损的小鼠体内后的情况。几个月后,肝脏一些主要部位的肝细胞得以再生。这一实验使得动物器官的结构和功能有改善的巨大空间。肝脏具有强大的自我修复能力,这是因为肝脏的组成细胞——肝细胞,可以在面对应激或损伤后迅速自我更新和修复。然而,如果发生了严重的肝脏损伤或者肝衰竭后,肝细胞则不能自我更新和修复。此外,在实验室

在 Nature Cell Biology杂志中,研究人员描述了他们将肝干细胞移植到肝脏严重受损的小鼠体内后的情况。几个月后,肝脏一些主要部位的肝细胞得以再生。这一实验使得动物器官的结构和功能有改善的巨大空间。


肝脏具有强大的自我修复能力,这是因为肝脏的组成细胞——肝细胞,可以在面对应激或损伤后迅速自我更新和修复。然而,如果发生了严重的肝脏损伤或者肝衰竭后,肝细胞则不能自我更新和修复。此外,在实验室条件下,培养肝细胞并不容易,因为实验室条件下它们的再生功能受到限制。为此,研究人员将重点置于寻找肝干细胞(又称为肝前体细胞,HPCs)以修复受损的肝脏组织,并维持肝脏的正常功能。

相比之下,HPCs可在实验室中生长和繁殖,且HPCs可以灵活分化成肝细胞和其他类型的肝细胞。
如果在实验室条件下人类肝干细胞也可复制并得以培养,这可作为一种治疗肝衰竭的治疗方案进行器官移植。

在医学研究理事会(MRC)再生医学中心的Stuart Forbes教授认为,这不仅是一个设想,有很大可能可以成为现实,需要不断的使用人体细胞进行实验。肝脏问题在世界各地都十分普遍,患者致死致残率都很高,因此如果可以通过使用某些药物使机体肝细胞分化为肝细胞修复受损肝脏组织,将对人类健康带来十分重要的影响。

这个研究体现了再生医学的特点和研究方向。通过进行再生医学的相关研究,有可能攻克世界人类健康问题如肝衰竭、关节炎、帕金森病和失明等。通过利用患者肝细胞培养断肢也在研究中,希望未来这些都可以实现。

原始出处:

Lu WY, Bird TG, Boulter L, Tsuchiya A, Cole AM, Hay T, Guest RV, Wojtacha D, Man TY, Mackinnon A, Ridgway RA, Kendall T, Williams MJ, Jamieson T, Raven A, Hay DC, Iredale JP, Clarke AR, Sansom OJ, Forbes SJ.Hepatic progenitor cells of biliary origin with liver repopulation capacity. Nat Cell Biol. 2015 Jul 20. doi: 10.1038/ncb3203.

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    2015-11-26 智智灵药
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    2016-04-04 liye789132251
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    2016-01-02 sunylz
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