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自然子刊撤稿韩春雨NgAgo论文,系作者主动撤回!

2017-08-03 13:26:24   法制晚报

法制晚报·看法新闻(记者黎史翔)记者今晨从英国《自然》杂志子刊《自然-生物技术》杂志获悉,发表在《自然-生物技术》上的题为“利用NgAgo进行DNA引导的基因组编辑”的论文于美国时间2017年8月2日(北京时间8月3日)撤稿了。论文作者韩春雨等人也同时发出撤稿声明。

撤稿声明写道,由于科研界一直无法根据我们论文提供的实验方案重复出论文图4所示的关键结果,我们决定撤回这项研究。在该图中,我们报告说,利用5′磷酸化单链DNA作为引导,NgAgo(Natronobacterium gregoryi Argonaute)能够有效引起双链断裂,并对人体细胞基因组进行编辑。虽然许多实验室都进行了努力(Protein Cell 7, 913-915, 2016; Nat. Biotechnol.35, 17-18, 2017; Cell Res.26, 1349-1352, 2016; PLOS One 12, e0177444, 2017) ,但是没有独立重复出这些结果的报告。因此,我们现在撤回我们的最初报告,以维护科学记录的完整性。不过,我们会继续调查该研究缺乏可重复性的原因,以提供一个优化的实验方案。

此外,《自然-生物技术》今天同时也发表了一篇关于此次撤稿的社论。

以下为社论全文

在社论中,一项宣称通过Argonaute酶实现基因编辑的研究被撤回,这显示了论文发表后的同行评议在全天候媒体时代的重要性。

韩春雨的这篇论文自去年发表后所产生的影响力,再怎么夸张地说也不为过,尤其是在论文的来源地中国。中国媒体纷纷进行报道,以大标题宣告一项全新基因编辑系统的发现。这无疑是一篇中国去年被报道最多的论文;媒体监测公司融文(Meltwater)的数据显示,仅在论文发表后的最初两个月,就有将近4000篇相关的中文新闻报道。

NgAgo的轰动之处集中在它有可能补充,甚至取代CRISPR/Cas9基因编辑系统之一点上。NgAgo有望以一个目标序列进行基因编辑(Cas9不仅需要目标序列,还需要另外一个附近的识别(PAM)序列)。而且,初始数据还显示了它在其它方面的优势,如引物的稳定性更强(DNA相对于Cas9采用的RNA),增强特异性,减少基因组编辑脱靶,改善在基因组富含GC区域的活性,以及使所用的试剂更易于合成和处理。

如果说这一切都听上去太过美好而令人难以置信,那么去年夏天以来,随着越来越多的实验室无法重复该论文所报告的基因组编辑功能,质疑声便开始出现了。在各种基因组编辑会议上,在新闻讨论组和电子邮件中,这篇论文成为最热话题之一。这很快便引起媒体注意,有关该初始报告有效性的正反两方面的声音开始交锋。我们内部的图像完整性筛查没有发现韩春雨论文的明显异常,复查数据的三位外部评审人也持相同观点。

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