PLoS One:大问题!3万余篇已发表文章认错细胞系,你是否中招?

2017-10-17 佚名 生物探索

错误的根源著名的HeLa细胞是世界上第一个永生细胞株,也是在医学研究中最重要和最常用的细胞系。不幸的是,几十年来,HeLa细胞一直在污染其它的细胞培养物。例如,由于历史上实验室的疏忽,这些快速繁殖的细胞侵占了其它细胞培养物。然而,这种情况不仅仅限于HeLa细胞!研究人员已经发现超过451个细胞系已被其它细胞完全吸收。因此,大量的细胞培养物在之前的传代和储存中就被贴错标签。这就导致科学文章发表时,研



错误的根源

著名的HeLa细胞是世界上第一个永生细胞株,也是在医学研究中最重要和最常用的细胞系。不幸的是,几十年来,HeLa细胞一直在污染其它的细胞培养物。例如,由于历史上实验室的疏忽,这些快速繁殖的细胞侵占了其它细胞培养物。

然而,这种情况不仅仅限于HeLa细胞!研究人员已经发现超过451个细胞系已被其它细胞完全吸收。因此,大量的细胞培养物在之前的传代和储存中就被贴错标签。这就导致科学文章发表时,研究人员甚至不知道自己已经犯了一个错误。

涉及3万余篇文章

直到近期,荷兰Radboud大学的研究人员Willem Halffman和Serge Horbach想知道这个问题有多大。

Halffman解释说:“我们研究了从1955年起,由于对细胞系的错误判别,科学出版界发生了什么事。其中许多文章仍然在网上列出错误的细胞系,且经常被其他作者引用。经过广泛的文献研究,我们相信这涉及大约33000份出版物。”

Serge Horbach说:“大多数科学家并不是故意地用错误的细胞发布新发现,这是个错误,但不是谎言。更令人关注的问题是研究数据可能是无效的,不可能重现。更可怕的是,我们已经知道鉴定细胞方面的错误有半个世纪,但许多研究者并没有意识到这些。使用错误鉴定的细胞,每周都有新的文章发表。”

名誉受损的恐惧

虽然许多生物医学专家并不知道这四百多种被错误鉴定的细胞系。但细胞配送中心无疑有着重要的责任,因为这是许多研究者获得细胞的地方。

Halffman说:“这些中心的员工认识到这个问题的严重性,但声称即使声明也没有人会听他们的。文章的发表让他们很生气。有时这些中心涉及到半私有公司,他们拒绝披露任何东西,以免声誉或财务损失。到目前为止,最大的因素是对名誉受损的恐惧。”

解决建议

多年来,为更积极地防止培养细胞出现交叉污染,已经制定了各种措施,如更严格的操作手册和更好的超净台。科学家们可以在他们的研究开始之前进行基因测试,防止认错了细胞。但这需要时间和金钱。

Halffman说:“和我交流的科学家们认为这是个最大的问题。为了解决这个问题,你要么必须减少发表文章的压力,要么要求所有研究人员在使用细胞之前进行基因测试。”

Halffman和Horbach说:“我们发表这篇文章并不是打算损害任何人的名誉。这是首要的问题:我们将如何处理已经犯下的错误?这就是我们想要确定的所有内容。一个解决办法是对所有3万余份出版物做一个免责声明,说明他们报告错了细胞系。然后由读者来决定它是否是一个问题,因为有时候它真的不重要。基本上,我们要提醒人们注意对结果的解释。另外,标记有问题的文件也还需要时间和金钱。”

如何鉴定是否中招

如果小伙伴们对手头上使用的细胞有所疑问,首先可以查阅ICLAC(International Cell Line Authentication Committee)2016年12月份上线的第八版鉴定错误细胞系登记信息(Register of Misidentified Cell Lines),网址:http://iclac.org/databases/cross-contaminations/ 现在这个信息已经登记了488种,看看你所用的是不是被列入其中;另外按作者所说做一个基因测试就可以对无法确定的细胞“验明正身”啦。

原始出处:

Horbach SPJM, Halffman W (2017) The ghosts of HeLa: How cell line misidentification contaminates the scientific literature. PLoS ONE12(10): e0186281. https://doi.org/10.1371/journal.pone.0186281.

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    2017-10-18 sunfeifeiyang

    学习

    0

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    2017-10-17 忠诚向上

    好好努力学习一下

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    2017-10-17 中医痴

    不错的.学习了.谢谢分享!

    0

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