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Nature纠错:脑癌细胞系摊上大事了,50年2000多篇论文都错了!

2016-09-06 解螺旋.子非鱼 解螺旋,医生科研助手

导语:8月31日,瑞典乌普萨拉肿瘤学家BengtWestermark通过DNA-指纹技术将从全球最大的生物材料保藏库(ATCC)获得的目前广泛应用的脑癌细胞系U87(据统计,相关论文已达2000多篇)与50年前建立的原始肿瘤样本进行比较,发现两者并不匹配;同时,目前也没有人能肯定使用的细胞系的真正起源。在科研届,实验汪们为了避免细胞“挂掉”,可谓是操碎了心,不仅要好吃好喝地细心供养细胞,还要时刻担

导语:8月31日,瑞典乌普萨拉肿瘤学家BengtWestermark通过DNA-指纹技术将从全球最大的生物材料保藏库(ATCC)获得的目前广泛应用的脑癌细胞系U87(据统计,相关论文已达2000多篇)与50年前建立的原始肿瘤样本进行比较,发现两者并不匹配;同时,目前也没有人能肯定使用的细胞系的真正起源。

在科研届,实验汪们为了避免细胞“挂掉”,可谓是操碎了心,不仅要好吃好喝地细心供养细胞,还要时刻担忧着细胞污染问题。其中,最最担心的就是细胞在暗地里进行“狸猫换太子”,这就好比一个欲练葵花宝典的人在自宫后忽然发现手中的武功秘籍变成了九阳神功一般,有一种迷之尴尬!细胞的“大变身”不仅会导致已经发表的论文因此而被撤销,更会耗费科研工作们宝贵的时间和精力。这不,最近就有一株脑癌细胞系摊上大事了。

8月31日,瑞典乌普萨拉肿瘤学家BengtWestermark通过DNA-指纹技术将从全球最大的生物材料保藏库(ATCC)获得的目前广泛应用的脑癌细胞系U87(据统计,相关论文已达2000多篇)与50年前建立的原始肿瘤样本进行比较,发现两者并不匹配;同时,目前也没有人能肯定目前使用的细胞系的真正起源。



科研成果然并卵的尴尬原因

但是庆幸的是,尽管U87不是最初的U87,但是它仍然来自胶质母细胞瘤组织,这就意味现在使用的U87细胞系仍可以反应出脑肿瘤的生物学,而无需被抛弃。此时,想必大部分从事脑癌研究的科研工作者可以把心妥妥的放回肚子里了,毕竟即无需撤回论文,也不用重新开始相关研究。



然而,有些科研工作者们却不见得如此幸运。无独有偶,今年6月份RetractionWatch网站的一则消息称,某一著名高校就曾因误将Hela细胞(宫颈癌细胞)当做KB细胞(口腔上皮样癌细胞)使用,以至于已发表的关于肿瘤新分子靶标的文章被撤销。


出错的细胞系及幕后推手


今年2月,中国科学院昆明细胞库在其官网公布了最新检出错误鉴定和交叉污染的细胞,表格如下,各位小伙伴快来看看自己的细胞是否身列其中:



以上所列细胞不过是冰山一角,国际细胞系认证委员会(ICLAC)已公布目前至少有438种细胞系已受到了全部污染,更有研究认为国内所建的人源性细胞系有85%都是错的。2014-2015年闹得沸沸扬扬的“STAP细胞”血案此刻还依然历历在目,究其原因,就是因为胚胎干细胞收到了污染。

 

其实,由被交叉污染或错误辨识的细胞系导致的研究结论错误、结果不可重复以及临床细胞治疗中产生的灾难性后果,已经严重浪费科研者的时间、精力和金钱,同时也让科研者们头疼不已。那么细胞系交叉污染或错误辨识的原因到底何在呢?



细胞系的正身验明

因而,NIH、ATCC、Nature和Science等近年对此多次发出呼吁,要求研究者对细胞进行鉴定。nature杂志更是从2015年5月份起就已经要求投稿者审查论文中使用的细胞系,以此来确保实验数据的准确性。

 

但值得注意的是,如果一项研究使用了错误鉴别的细胞系,而作者却能给出合理的解释,说明错误的细胞系不影响研究结果,那么文章也不会被自动拒稿。反之,若杂志认为理由不充足,也可能会要求作者删除数据。




另外,除了Nature杂志外,还有以下期刊杂志要求投稿者做细胞系审查鉴定。




为了确定细胞的真实身份,科研工作者们可谓是煞费苦心。好在尽管细胞有“张良计”,科研者们自有“过墙梯”。2011年美国颁布细胞STR(Short Tandem Repeat,短串联重复序列)基因分型标准已成为ICLAC、ATCC等权威机构鉴定细胞系的“金标准”。


 

现阶段许多实验室用STR分型(已广泛用于亲子鉴定)来鉴定人源性细胞系。这不仅是因为STR位点具有高度多态性,也是因为每一个STR位点均能被PCR扩增且扩增产物标记上不同颜色的荧光,使得扩增产物很容易通过片段大小和颜色来区分。然后就可根据所得的STR分型结果与专业的细胞STR数据库比对,进而推算出样品所属的细胞系或可能的交叉污染的细胞系名称。

 



当然,各位小伙伴们要想把握好给细胞验明正身的时机,可借鉴以下表格



此外,由于对细胞系的命名缺乏统一的标准,在某种程度上也会早成细胞系鉴定错误等问题,因而,为了解决此问题,美国Genetech公司的Richard M. Neve等人开发出了一种新的、适用于科研界细胞描述方法,即在录入细胞系时需要提供这四项基本信息:1. 独特的细胞名称;2. 物种来源;3. 最原始组织来源;4. 组织的病理特征。

 

参考文献:


1. Venerable brain-cancer cell line faces identity crisis

2. Origin of theU87MG glioma cell line: Good news and bad news

3. Aresource for cell line authentication, annotation and quality control

4. Shorttandem repeat profilingprovides an international reference standard for humancell lines

5. Authentication of Human Cell Lines:Standardization of STR Profiling

6.Time to tackle cells’ mistaken identity

7.Assembly and initial characterization of apanel of 85 genomically validatedcell lines from diverse head and neck tumorsites


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createdBy=5e291719269, createdName=大旺旺, createdTime=Wed Sep 07 07:02:00 CST 2016, time=2016-09-07, status=1, ipAttribution=)]
    2016-10-15 优质青年

    这就跟尴尬了哦

    0

  3. 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time=2016-09-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1391869, encodeId=978813918691a, content=<a href='/topic/show?id=085c8495615' target=_blank style='color:#2F92EE;'>#脑癌#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=77, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=84956, encryptionId=085c8495615, topicName=脑癌)], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTKQHWdlyPWPmuHjfEXicudmC0dJ6SN5PHzglbDHibXpT1VXF2fKDnTzl2Eib4Pf94p58cnSKA3ZfGdFQ/132, createdBy=c44f2500101, createdName=ms2694732865965676, createdTime=Thu Sep 08 06:22:00 CST 2016, time=2016-09-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1554004, encodeId=203a155400401, content=<a href='/topic/show?id=7482e7994d0' target=_blank style='color:#2F92EE;'>#细胞系#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=74, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=77994, encryptionId=7482e7994d0, topicName=细胞系)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=6c9f14484011, createdName=zhangxingru, createdTime=Thu Sep 08 06:22:00 CST 2016, time=2016-09-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=112889, encodeId=e18d1128899f, content=越来越多限制,科研艰辛, beContent=null, objectType=article, channel=null, level=null, likeNumber=109, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=73441710184, createdName=明崖, createdTime=Wed Sep 07 08:09:00 CST 2016, time=2016-09-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=112864, encodeId=9066112864af, content=值得学习, beContent=null, objectType=article, channel=null, level=null, likeNumber=99, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=5e291719269, createdName=大旺旺, createdTime=Wed Sep 07 07:02:00 CST 2016, time=2016-09-07, status=1, ipAttribution=)]
    2016-09-14 liye789132251
  4. 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createdBy=5e291719269, createdName=大旺旺, createdTime=Wed Sep 07 07:02:00 CST 2016, time=2016-09-07, status=1, ipAttribution=)]
    2016-09-12 摩天轮

    又长见识了

    0

  5. 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time=2016-09-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1391869, encodeId=978813918691a, content=<a href='/topic/show?id=085c8495615' target=_blank style='color:#2F92EE;'>#脑癌#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=77, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=84956, encryptionId=085c8495615, topicName=脑癌)], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTKQHWdlyPWPmuHjfEXicudmC0dJ6SN5PHzglbDHibXpT1VXF2fKDnTzl2Eib4Pf94p58cnSKA3ZfGdFQ/132, createdBy=c44f2500101, createdName=ms2694732865965676, createdTime=Thu Sep 08 06:22:00 CST 2016, time=2016-09-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1554004, encodeId=203a155400401, content=<a href='/topic/show?id=7482e7994d0' target=_blank style='color:#2F92EE;'>#细胞系#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=74, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=77994, encryptionId=7482e7994d0, topicName=细胞系)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=6c9f14484011, createdName=zhangxingru, createdTime=Thu Sep 08 06:22:00 CST 2016, time=2016-09-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=112889, encodeId=e18d1128899f, content=越来越多限制,科研艰辛, beContent=null, objectType=article, channel=null, level=null, likeNumber=109, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=73441710184, createdName=明崖, createdTime=Wed Sep 07 08:09:00 CST 2016, time=2016-09-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=112864, encodeId=9066112864af, content=值得学习, beContent=null, objectType=article, channel=null, level=null, likeNumber=99, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=5e291719269, createdName=大旺旺, createdTime=Wed Sep 07 07:02:00 CST 2016, time=2016-09-07, status=1, ipAttribution=)]
    2016-09-09 xueshucao

    呃…呃…呃…

    0

  6. 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time=2016-09-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1391869, encodeId=978813918691a, content=<a href='/topic/show?id=085c8495615' target=_blank style='color:#2F92EE;'>#脑癌#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=77, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=84956, encryptionId=085c8495615, topicName=脑癌)], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTKQHWdlyPWPmuHjfEXicudmC0dJ6SN5PHzglbDHibXpT1VXF2fKDnTzl2Eib4Pf94p58cnSKA3ZfGdFQ/132, createdBy=c44f2500101, createdName=ms2694732865965676, createdTime=Thu Sep 08 06:22:00 CST 2016, time=2016-09-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1554004, encodeId=203a155400401, content=<a href='/topic/show?id=7482e7994d0' target=_blank style='color:#2F92EE;'>#细胞系#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=74, replyNumber=0, 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createdBy=5e291719269, createdName=大旺旺, createdTime=Wed Sep 07 07:02:00 CST 2016, time=2016-09-07, status=1, ipAttribution=)]
    2016-09-08 yxch36
  7. 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createdBy=5e291719269, createdName=大旺旺, createdTime=Wed Sep 07 07:02:00 CST 2016, time=2016-09-07, status=1, ipAttribution=)]
  8. 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createdBy=5e291719269, createdName=大旺旺, createdTime=Wed Sep 07 07:02:00 CST 2016, time=2016-09-07, status=1, ipAttribution=)]
  9. 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time=2016-09-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1391869, encodeId=978813918691a, content=<a href='/topic/show?id=085c8495615' target=_blank style='color:#2F92EE;'>#脑癌#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=77, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=84956, encryptionId=085c8495615, topicName=脑癌)], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTKQHWdlyPWPmuHjfEXicudmC0dJ6SN5PHzglbDHibXpT1VXF2fKDnTzl2Eib4Pf94p58cnSKA3ZfGdFQ/132, createdBy=c44f2500101, createdName=ms2694732865965676, createdTime=Thu Sep 08 06:22:00 CST 2016, time=2016-09-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1554004, encodeId=203a155400401, content=<a href='/topic/show?id=7482e7994d0' target=_blank style='color:#2F92EE;'>#细胞系#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=74, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=77994, encryptionId=7482e7994d0, topicName=细胞系)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=6c9f14484011, createdName=zhangxingru, createdTime=Thu Sep 08 06:22:00 CST 2016, time=2016-09-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=112889, encodeId=e18d1128899f, content=越来越多限制,科研艰辛, beContent=null, objectType=article, channel=null, level=null, likeNumber=109, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=73441710184, createdName=明崖, createdTime=Wed Sep 07 08:09:00 CST 2016, time=2016-09-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=112864, encodeId=9066112864af, content=值得学习, beContent=null, objectType=article, channel=null, level=null, likeNumber=99, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=5e291719269, createdName=大旺旺, createdTime=Wed Sep 07 07:02:00 CST 2016, time=2016-09-07, status=1, ipAttribution=)]
    2016-09-07 明崖

    越来越多限制,科研艰辛

    0

  10. 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createdBy=5e291719269, createdName=大旺旺, createdTime=Wed Sep 07 07:02:00 CST 2016, time=2016-09-07, status=1, ipAttribution=)]
    2016-09-07 大旺旺

    值得学习

    0

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