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对于提高iPS的转化效率
; h; _) W' F; `! N 国际干细胞主流研究方向集中在细胞核内的调控因子和高通量小分子筛选方面,中科院广州生物医药与健康研究院院长裴端卿研究员领导的实验团队则将研究方向放到了细胞外环境——培养基成分上。在研究体细胞的重编程过程中,他们发现细胞内发生能量代谢变化的时候会产生量的活性氧(ROS)成分,些成分能导致细胞老化,可能是造成诱导多能干细胞转化效率低的原因。这个现象促使该研究团队产生在培养基里添加抗氧化剂来提高体细胞重编程效率的想法,经过一系列实验,他们发现了维生素C能够将原先的每一万至十万个细胞,才能有一个细胞转化为iPS的低效率,提高到了10%的高效率.4 G: w8 N( B/ F$ h
这是裴端卿研究团队2010-01-08 发表在Cell stem Cell上的原文1 e" H5 W7 W( _: t9 c, O- r1 E5 y' H( \8 c
Vitamin C Enhances the Generation of Mouse and Human Induced Pluripotent Stem Cells 9 x' f" K) z# {0 |
摘要:Somatic cells can be reprogrammed into induced pluripotent stem cells (iPSCs) by defined factors.However, the low efficiency and slow kinetics of the reprogramming process have hampered progress with this technology. Here we report that a natural compound, vitamin C (Vc), enhances iPSC generation from both mouse and human somatic cells. Vc acts at least in part by alleviating cell senescence, a recently identified roadblock for reprogramming. In addition, Vc accelerates gene expression changes and promotes the transition of pre-iPSC colonies to a fully reprogrammed state. Our results therefore highlight a straightforward method for improving the speed and efficiency of iPSC generation and provide additional insights into the mechanistic basis of the reprogramming process. |
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