Nature:P53突变,干细胞疗法背后可能的癌变风险

2017-04-28 MedSci MedSci原创

由于P53蛋白是限制细胞增殖的关键蛋白,缺失P53蛋白会导致细胞恶性增殖,最终导致癌变。研究人员因此提出警示,在未来选择干细胞疗法的时候,一定要充分的调查干细胞的基因突变,以防止可能的癌变发生。

人类的多能性干细胞因为其能够无限的自我更新,使其成为再生组织,再生器官疗法的热门候选。但是这一再生的过程中,干细胞本身可能通过获得大量的DNA变异,发生功能性突变,从而使其在体外培养中获得帮助其生长的优势。那么在体外培养多能性干细胞都有可能发生怎样的突变,获得怎样的功能性变化,目前都不是很清楚。

在最新上线的Nature杂志中,Florian T. Merkle及其同事报道了他们的发现:在体外培养的多能性干细胞中,有一部分的细胞都发生了P53基因的突变。P53基因是控制细胞生长的重要限制蛋白,很多癌变的细胞都发生了P53基因的突变。

研究人员首先通过测序比较了140种不同的人类胚胎干细胞,其中包括了26种准备用于临床治疗研究的干细胞。通过比较这些干细胞的编码蛋白的基因外显子(exomes),研究人员发现有五种不相关的干细胞细胞系在P53基因的编码区带有六种突变。这六种突变都造成P53表达的缺失,并且在常见的各种肿瘤细胞中也发现了这六种P53基因的突变。另外,研究人员还发现其他的干细胞也带有九种P53基因的突变,这些突变虽然不造成P53基因的表达缺失,但是都影响到P53蛋白的结合DNA区域的序列。

研究人员接着发现,随着干细胞的长期体外培养与传代,突变的发生几率也显著上升。有些干细胞比原代细胞的突变率超过了50%。研究人员假设,干细胞为了获得生长的优势会选择性的获得P53基因的突变。

由于P53蛋白是限制细胞增殖的关键蛋白,缺失P53蛋白会导致细胞恶性增殖,最终导致癌变。研究人员因此提出警示,在未来选择干细胞疗法的时候,一定要充分的调查干细胞的基因突变,以防止可能的癌变发生。

原始出处:
Florian T. Merkle et al. Human pluripotent stem cells recurrently acquire and expand dominant negative P53 mutations. Nature (2017) doi:10.1038/nature22312

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    2018-01-16 liye789132251
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    2017-05-04 chunjianf

    学习了,谢谢分享

    0

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    2017-04-30 138****1711

    学习了,谢谢分享!

    0

  4. 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topicName=null, topicId=null, topicList=[TopicDto(id=71281, encryptionId=154be128170, topicName=癌变)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=21015, createdName=heli0118, createdTime=Sat Apr 29 17:26:00 CST 2017, time=2017-04-29, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=191719, encodeId=da66191e196a, content=分析的不错,学习并分享!, beContent=null, objectType=article, channel=null, level=null, likeNumber=54, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20200816/e4675a86ea694f12b82202b320dc2654/12f6b900498349e994ce8f516a584d6a.jpg, createdBy=09431951290, createdName=大爰, createdTime=Sat Apr 29 07:47:09 CST 2017, time=2017-04-29, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=191437, encodeId=79a519143e1a, content=认真学习,把间接经验应用到临床实践中去,然后再总结出新思路。点赞啦!, beContent=null, objectType=article, channel=null, level=null, likeNumber=53, 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  5. 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topicName=null, topicId=null, topicList=[TopicDto(id=71281, encryptionId=154be128170, topicName=癌变)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=21015, createdName=heli0118, createdTime=Sat Apr 29 17:26:00 CST 2017, time=2017-04-29, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=191719, encodeId=da66191e196a, content=分析的不错,学习并分享!, beContent=null, objectType=article, channel=null, level=null, likeNumber=54, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20200816/e4675a86ea694f12b82202b320dc2654/12f6b900498349e994ce8f516a584d6a.jpg, createdBy=09431951290, createdName=大爰, createdTime=Sat Apr 29 07:47:09 CST 2017, time=2017-04-29, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=191437, encodeId=79a519143e1a, content=认真学习,把间接经验应用到临床实践中去,然后再总结出新思路。点赞啦!, beContent=null, objectType=article, channel=null, level=null, likeNumber=53, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/NUyjXTCJjo7s7ZCKOmmbBTD6nE7gcd5OZpvyGEzkxBP3S275k5ZJVrsPkotZhBglRHM9rKvcj1OgkssqhcnoPw8zIaMZTF8c/0, createdBy=4c441942088, createdName=ylzr123, createdTime=Fri Apr 28 10:25:46 CST 2017, time=2017-04-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=191371, encodeId=67c31913e14e, content=谢谢分享,学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=60, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/NUyjXTCJjo6Nx0VGA4QMDzOP8oAgnV4h51EjSfehJ9QxyiaSmw8PB56BhY8KXFSxHCibXrzcy4abrzSibXQPxJ9kzrLcJyhhB8a/0, createdBy=1d3b1672603, createdName=明月清辉, createdTime=Fri Apr 28 08:23:11 CST 2017, time=2017-04-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=191353, encodeId=b44a191353e2, content=学习了,谢谢分享, beContent=null, objectType=article, channel=null, level=null, likeNumber=31, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/udqvoAsWtvRVficPKOpMh4M31O9bJ8jMiaUHAheeNpIqMapC8mUnBWfEskrcVjofbicWU4icRD6vFvVeEYlPmSbXELickazEGVFYO/0, createdBy=24741603767, createdName=医艺依意, createdTime=Fri Apr 28 07:47:46 CST 2017, time=2017-04-28, status=1, ipAttribution=)]
    2017-04-29 zhishijing
  6. 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topicName=null, topicId=null, topicList=[TopicDto(id=71281, encryptionId=154be128170, topicName=癌变)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=21015, createdName=heli0118, createdTime=Sat Apr 29 17:26:00 CST 2017, time=2017-04-29, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=191719, encodeId=da66191e196a, content=分析的不错,学习并分享!, beContent=null, objectType=article, channel=null, level=null, likeNumber=54, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20200816/e4675a86ea694f12b82202b320dc2654/12f6b900498349e994ce8f516a584d6a.jpg, createdBy=09431951290, createdName=大爰, createdTime=Sat Apr 29 07:47:09 CST 2017, time=2017-04-29, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=191437, encodeId=79a519143e1a, content=认真学习,把间接经验应用到临床实践中去,然后再总结出新思路。点赞啦!, beContent=null, objectType=article, channel=null, level=null, likeNumber=53, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/NUyjXTCJjo7s7ZCKOmmbBTD6nE7gcd5OZpvyGEzkxBP3S275k5ZJVrsPkotZhBglRHM9rKvcj1OgkssqhcnoPw8zIaMZTF8c/0, createdBy=4c441942088, createdName=ylzr123, createdTime=Fri Apr 28 10:25:46 CST 2017, time=2017-04-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=191371, encodeId=67c31913e14e, content=谢谢分享,学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=60, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/NUyjXTCJjo6Nx0VGA4QMDzOP8oAgnV4h51EjSfehJ9QxyiaSmw8PB56BhY8KXFSxHCibXrzcy4abrzSibXQPxJ9kzrLcJyhhB8a/0, createdBy=1d3b1672603, createdName=明月清辉, createdTime=Fri Apr 28 08:23:11 CST 2017, time=2017-04-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=191353, encodeId=b44a191353e2, content=学习了,谢谢分享, beContent=null, objectType=article, channel=null, level=null, likeNumber=31, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/udqvoAsWtvRVficPKOpMh4M31O9bJ8jMiaUHAheeNpIqMapC8mUnBWfEskrcVjofbicWU4icRD6vFvVeEYlPmSbXELickazEGVFYO/0, createdBy=24741603767, createdName=医艺依意, createdTime=Fri Apr 28 07:47:46 CST 2017, time=2017-04-28, status=1, ipAttribution=)]
    2017-04-29 heli0118
  7. 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attachment=null, authenticateStatus=null, createdAvatar=, createdBy=5319428, createdName=jjjiang0199, createdTime=Sat Apr 29 17:26:00 CST 2017, time=2017-04-29, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1372373, encodeId=66b713e23730d, content=<a href='/topic/show?id=9d861362e53' target=_blank style='color:#2F92EE;'>#p53#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=23, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=13627, encryptionId=9d861362e53, topicName=p53)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=5d70341, createdName=zhishijing, createdTime=Sat Apr 29 17:26:00 CST 2017, time=2017-04-29, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1557041, encodeId=56c4155e04181, content=<a href='/topic/show?id=154be128170' target=_blank style='color:#2F92EE;'>#癌变#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=71281, encryptionId=154be128170, topicName=癌变)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=21015, createdName=heli0118, createdTime=Sat Apr 29 17:26:00 CST 2017, time=2017-04-29, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=191719, encodeId=da66191e196a, content=分析的不错,学习并分享!, beContent=null, objectType=article, channel=null, level=null, likeNumber=54, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20200816/e4675a86ea694f12b82202b320dc2654/12f6b900498349e994ce8f516a584d6a.jpg, createdBy=09431951290, createdName=大爰, createdTime=Sat Apr 29 07:47:09 CST 2017, time=2017-04-29, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=191437, encodeId=79a519143e1a, content=认真学习,把间接经验应用到临床实践中去,然后再总结出新思路。点赞啦!, beContent=null, objectType=article, channel=null, level=null, likeNumber=53, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/NUyjXTCJjo7s7ZCKOmmbBTD6nE7gcd5OZpvyGEzkxBP3S275k5ZJVrsPkotZhBglRHM9rKvcj1OgkssqhcnoPw8zIaMZTF8c/0, createdBy=4c441942088, createdName=ylzr123, createdTime=Fri Apr 28 10:25:46 CST 2017, time=2017-04-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=191371, encodeId=67c31913e14e, content=谢谢分享,学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=60, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/NUyjXTCJjo6Nx0VGA4QMDzOP8oAgnV4h51EjSfehJ9QxyiaSmw8PB56BhY8KXFSxHCibXrzcy4abrzSibXQPxJ9kzrLcJyhhB8a/0, createdBy=1d3b1672603, createdName=明月清辉, createdTime=Fri Apr 28 08:23:11 CST 2017, time=2017-04-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=191353, encodeId=b44a191353e2, content=学习了,谢谢分享, beContent=null, objectType=article, channel=null, level=null, likeNumber=31, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/udqvoAsWtvRVficPKOpMh4M31O9bJ8jMiaUHAheeNpIqMapC8mUnBWfEskrcVjofbicWU4icRD6vFvVeEYlPmSbXELickazEGVFYO/0, createdBy=24741603767, createdName=医艺依意, createdTime=Fri Apr 28 07:47:46 CST 2017, time=2017-04-28, status=1, ipAttribution=)]
    2017-04-29 大爰

    分析的不错,学习并分享!

    0

  8. 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replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/NUyjXTCJjo7s7ZCKOmmbBTD6nE7gcd5OZpvyGEzkxBP3S275k5ZJVrsPkotZhBglRHM9rKvcj1OgkssqhcnoPw8zIaMZTF8c/0, createdBy=4c441942088, createdName=ylzr123, createdTime=Fri Apr 28 10:25:46 CST 2017, time=2017-04-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=191371, encodeId=67c31913e14e, content=谢谢分享,学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=60, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/NUyjXTCJjo6Nx0VGA4QMDzOP8oAgnV4h51EjSfehJ9QxyiaSmw8PB56BhY8KXFSxHCibXrzcy4abrzSibXQPxJ9kzrLcJyhhB8a/0, createdBy=1d3b1672603, createdName=明月清辉, createdTime=Fri Apr 28 08:23:11 CST 2017, time=2017-04-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=191353, encodeId=b44a191353e2, content=学习了,谢谢分享, beContent=null, objectType=article, channel=null, level=null, likeNumber=31, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/udqvoAsWtvRVficPKOpMh4M31O9bJ8jMiaUHAheeNpIqMapC8mUnBWfEskrcVjofbicWU4icRD6vFvVeEYlPmSbXELickazEGVFYO/0, createdBy=24741603767, createdName=医艺依意, createdTime=Fri Apr 28 07:47:46 CST 2017, time=2017-04-28, status=1, ipAttribution=)]
    2017-04-28 ylzr123

    认真学习,把间接经验应用到临床实践中去,然后再总结出新思路。点赞啦!

    0

  9. 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content=学习了,谢谢分享, beContent=null, objectType=article, channel=null, level=null, likeNumber=31, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/udqvoAsWtvRVficPKOpMh4M31O9bJ8jMiaUHAheeNpIqMapC8mUnBWfEskrcVjofbicWU4icRD6vFvVeEYlPmSbXELickazEGVFYO/0, createdBy=24741603767, createdName=医艺依意, createdTime=Fri Apr 28 07:47:46 CST 2017, time=2017-04-28, status=1, ipAttribution=)]
    2017-04-28 明月清辉

    谢谢分享,学习了

    0

  10. 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content=学习了,谢谢分享, beContent=null, objectType=article, channel=null, level=null, likeNumber=31, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/udqvoAsWtvRVficPKOpMh4M31O9bJ8jMiaUHAheeNpIqMapC8mUnBWfEskrcVjofbicWU4icRD6vFvVeEYlPmSbXELickazEGVFYO/0, createdBy=24741603767, createdName=医艺依意, createdTime=Fri Apr 28 07:47:46 CST 2017, time=2017-04-28, status=1, ipAttribution=)]
    2017-04-28 医艺依意

    学习了,谢谢分享

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