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厉害了中国科技:诱导多能干细胞助推再生医学

2018-04-09 07:30:24    新华网

裴端卿说:“我们这项研究正是采用药物来精细地调节细胞染色质‘密码串’上的密码状态,首先采用一组药物将体细胞命运状态‘解锁’,进而采用另一组药物将细胞命运驱动到多能干细胞状态,进而实现了细胞命运的‘返老还童’。”

有趣的是,研究人员还发现了药物驱动细胞“返老还童”的青春期,即药物先驱动细胞返回到由GATA 和FOX转录因子家族成员看守的细胞染色质中间态,然后再进一步返回到类似胚胎发育早期的多能干细胞态。该发现体现了药物驱动细胞“返老还童”在“解锁”程序设计上的特殊性和精巧性,为药物诱导细胞命运转变的应用研究提供了理论指导。

由于没有引入外源基因,裴端卿团队的化合物诱导干细胞多能性方法操作简便、诱导过程条件均匀、标准化,将为干细胞应用提供安全、高效的制备干细胞的方法,具有广阔应用市场。与此同时,为开辟药物诱导细胞命运转变提供了新方向,将极大推动干细胞及再生医学的发展,服务于我国的医疗与卫生事业。

中科院上海药物研究所研究员、国家新药筛选中心副主任谢欣表示,该研究方法与常规的诱导方法有显著区别,是一个全新的机制。且该研究极大提高了诱导的效率,使化学诱导有望成为诱导多能干细胞的常规方法。更为重要的是,这个研究使我国在化合物诱导多能干细胞领域处于世界领先的地位。

“未来可以根据所需干细胞类型,设计特定药水,有目的性诱导出各种干细胞。”裴端卿说,这只是一个开始,现正在进一步研究如何大幅缩短细胞“浸泡”时间,提高效率。(记者 吴月辉)

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