Baidu
map

Elife:袭荣文实验室发现干细胞-子细胞扩增环路介导了再生和肿瘤发生

2017-04-25 佚名 北京生命科学研究所

组织的再生能力与肿瘤的发生有密切的相关性,但其中的机制一直不能被解释。研究人员通过对果蝇肠上皮不同类型的细胞表达谱的比较,发现了一个在未分化细胞中特异表达的转录因子Sox21a. 用制备的抗体染色发现Sox21a 在将要分化的细胞中的表达有个明显的上调。通过CRISPR/Cas9基因组编辑技术,研究人员得到了Sox21a基因敲除果蝇,并惊奇地发现突变的果蝇在出生1-2周后即产生大量肠道肿瘤。进一步

组织的再生能力与肿瘤的发生有密切的相关性,但其中的机制一直不能被解释。研究人员通过对果蝇肠上皮不同类型的细胞表达谱的比较,发现了一个在未分化细胞中特异表达的转录因子Sox21a. 用制备的抗体染色发现Sox21a 在将要分化的细胞中的表达有个明显的上调。通过CRISPR/Cas9基因组编辑技术,研究人员得到了Sox21a基因敲除果蝇,并惊奇地发现突变的果蝇在出生1-2周后即产生大量肠道肿瘤。进一步的机制研究发现Sox21a 对细胞的分化是必须的,它的突变使干细胞的子细胞一直处于未分化状态;另外,Sox21a的突变使未分化细胞分泌大量细胞促分裂因子,使其附近的干细胞增殖并继续产生未分化细胞。这样便形成了一个由干细胞-子细胞组成的正向反馈通路,或称干细胞-子细胞扩增环路,使未分化细胞不断产生和积累,最终导致了肿瘤的发生。

更有趣的是,研究人员发现Sox21a 在正常的肠上皮中呈现表达的多变性。在肠上皮受损时,Sox21a 会在未分化细胞中临时下调以激活干细胞-子细胞扩增环路,从而快速产生大量未分化细胞,为上皮的重建做准备。当损伤刺激停止后,Sox21a 在未分化细胞中的表达迅速上调,从而促进了它们的分化、上皮的再生和组织的修复。因此这项工作不但发现了一个崭新的促进再生和肿瘤发生的机制,而且对再生和肿瘤的关系提供了一个分子机制的解释:暂时性干细胞-子细胞扩增环路的激活会促进组织再生,而持续性的激活会导致肿瘤的发生。研究人员推测这个新发现的促进再生和肿瘤的机制在人和高等动物中可能也是存在的,因此有必要研究它是不是导致人类癌症的常见机制。

北生所与北京协和医学院联合培养的博士生陈君为本论文第一作者;其他作者还有袭荣文实验室的徐娜博士,核酸测序中心的黄焕伟、蔡涛博士。袭荣文博士为本论文通讯作者。此项研究由科技部973、国家自然科学基金委员会及北京市政府资助,在北京生命科学研究所完成。

原始出处:

版权声明:
本网站所有内容来源注明为“梅斯医学”或“MedSci原创”的文字、图片和音视频资料,版权均属于梅斯医学所有。非经授权,任何媒体、网站或个人不得转载,授权转载时须注明来源为“梅斯医学”。其它来源的文章系转载文章,或“梅斯号”自媒体发布的文章,仅系出于传递更多信息之目的,本站仅负责审核内容合规,其内容不代表本站立场,本站不负责内容的准确性和版权。如果存在侵权、或不希望被转载的媒体或个人可与我们联系,我们将立即进行删除处理。
在此留言
评论区 (5)
#插入话题
  1. [GetPortalCommentsPageByObjectIdResponse(id=1972998, encodeId=2bf119e299811, content=<a href='/topic/show?id=72d566e3a6' target=_blank style='color:#2F92EE;'>#eLife#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=64, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=6673, encryptionId=72d566e3a6, topicName=eLife)], attachment=null, authenticateStatus=null, createdAvatar=http://thirdqq.qlogo.cn/qqapp/1103841572/C2EFD5CFB07FE291138AD4FD0C98E3DE/100, createdBy=e3d52500031, createdName=膀胱癌, createdTime=Mon Mar 19 06:46:00 CST 2018, time=2018-03-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2068499, encodeId=0e942068499f5, content=<a href='/topic/show?id=59371088215' target=_blank style='color:#2F92EE;'>#Life#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=70, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=10882, encryptionId=59371088215, topicName=Life)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=fc8528, createdName=clmlylxy, createdTime=Tue Jul 04 15:46:00 CST 2017, time=2017-07-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=207130, encodeId=c8e120e1308b, content=学习了,感谢分享!, beContent=null, objectType=article, channel=null, level=null, likeNumber=112, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://q.qlogo.cn/qqapp/1103841572/C20CB8E4EBB36F5B821651C710BCB491/100, createdBy=18de1715848, createdName=lofter, createdTime=Tue Jun 06 07:36:05 CST 2017, time=2017-06-06, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=193302, encodeId=6d8d19330200, content=不明觉厉, beContent=null, objectType=article, channel=null, level=null, likeNumber=105, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/NUyjXTCJjo6O55qCRv6IXDt3IYfwIL1e8FF15SyUqOez3JicibhLWSNib3MbuMkicVm1ZAp33VenfMYmj8oJM08SWSSHXc5jFj9ic/0, createdBy=2db52049023, createdName=franksmmu, createdTime=Wed May 03 15:15:40 CST 2017, time=2017-05-03, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=190552, encodeId=b96a190552c9, content=学习了,谢谢作者分享!, beContent=null, objectType=article, channel=null, level=null, likeNumber=114, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/mONcle9pic3xJXLtMtt5B40XXuPjn9xn1rBhrM6fHLkX1hI86ZoWoPJkgDkZuJNKkBfBHOcRd1fAdezg7JlHNOokohdAp3WkI/0, createdBy=32c81964262, createdName=1e145228m78(暂无匿称), createdTime=Tue Apr 25 22:44:54 CST 2017, time=2017-04-25, status=1, ipAttribution=)]
    2018-03-19 膀胱癌
  2. [GetPortalCommentsPageByObjectIdResponse(id=1972998, encodeId=2bf119e299811, content=<a href='/topic/show?id=72d566e3a6' target=_blank style='color:#2F92EE;'>#eLife#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=64, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=6673, encryptionId=72d566e3a6, topicName=eLife)], attachment=null, authenticateStatus=null, createdAvatar=http://thirdqq.qlogo.cn/qqapp/1103841572/C2EFD5CFB07FE291138AD4FD0C98E3DE/100, createdBy=e3d52500031, createdName=膀胱癌, createdTime=Mon Mar 19 06:46:00 CST 2018, time=2018-03-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2068499, encodeId=0e942068499f5, content=<a href='/topic/show?id=59371088215' target=_blank style='color:#2F92EE;'>#Life#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=70, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=10882, encryptionId=59371088215, topicName=Life)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=fc8528, createdName=clmlylxy, createdTime=Tue Jul 04 15:46:00 CST 2017, time=2017-07-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=207130, encodeId=c8e120e1308b, content=学习了,感谢分享!, beContent=null, objectType=article, channel=null, level=null, likeNumber=112, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://q.qlogo.cn/qqapp/1103841572/C20CB8E4EBB36F5B821651C710BCB491/100, createdBy=18de1715848, createdName=lofter, createdTime=Tue Jun 06 07:36:05 CST 2017, time=2017-06-06, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=193302, encodeId=6d8d19330200, content=不明觉厉, beContent=null, objectType=article, channel=null, level=null, likeNumber=105, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/NUyjXTCJjo6O55qCRv6IXDt3IYfwIL1e8FF15SyUqOez3JicibhLWSNib3MbuMkicVm1ZAp33VenfMYmj8oJM08SWSSHXc5jFj9ic/0, createdBy=2db52049023, createdName=franksmmu, createdTime=Wed May 03 15:15:40 CST 2017, time=2017-05-03, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=190552, encodeId=b96a190552c9, content=学习了,谢谢作者分享!, beContent=null, objectType=article, channel=null, level=null, likeNumber=114, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/mONcle9pic3xJXLtMtt5B40XXuPjn9xn1rBhrM6fHLkX1hI86ZoWoPJkgDkZuJNKkBfBHOcRd1fAdezg7JlHNOokohdAp3WkI/0, createdBy=32c81964262, createdName=1e145228m78(暂无匿称), createdTime=Tue Apr 25 22:44:54 CST 2017, time=2017-04-25, status=1, ipAttribution=)]
    2017-07-04 clmlylxy
  3. [GetPortalCommentsPageByObjectIdResponse(id=1972998, encodeId=2bf119e299811, content=<a href='/topic/show?id=72d566e3a6' target=_blank style='color:#2F92EE;'>#eLife#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=64, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=6673, encryptionId=72d566e3a6, topicName=eLife)], attachment=null, authenticateStatus=null, createdAvatar=http://thirdqq.qlogo.cn/qqapp/1103841572/C2EFD5CFB07FE291138AD4FD0C98E3DE/100, createdBy=e3d52500031, createdName=膀胱癌, createdTime=Mon Mar 19 06:46:00 CST 2018, time=2018-03-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2068499, encodeId=0e942068499f5, content=<a href='/topic/show?id=59371088215' target=_blank style='color:#2F92EE;'>#Life#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=70, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=10882, encryptionId=59371088215, topicName=Life)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=fc8528, createdName=clmlylxy, createdTime=Tue Jul 04 15:46:00 CST 2017, time=2017-07-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=207130, encodeId=c8e120e1308b, content=学习了,感谢分享!, beContent=null, objectType=article, channel=null, level=null, likeNumber=112, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://q.qlogo.cn/qqapp/1103841572/C20CB8E4EBB36F5B821651C710BCB491/100, createdBy=18de1715848, createdName=lofter, createdTime=Tue Jun 06 07:36:05 CST 2017, time=2017-06-06, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=193302, encodeId=6d8d19330200, content=不明觉厉, beContent=null, objectType=article, channel=null, level=null, likeNumber=105, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/NUyjXTCJjo6O55qCRv6IXDt3IYfwIL1e8FF15SyUqOez3JicibhLWSNib3MbuMkicVm1ZAp33VenfMYmj8oJM08SWSSHXc5jFj9ic/0, createdBy=2db52049023, createdName=franksmmu, createdTime=Wed May 03 15:15:40 CST 2017, time=2017-05-03, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=190552, encodeId=b96a190552c9, content=学习了,谢谢作者分享!, beContent=null, objectType=article, channel=null, level=null, likeNumber=114, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/mONcle9pic3xJXLtMtt5B40XXuPjn9xn1rBhrM6fHLkX1hI86ZoWoPJkgDkZuJNKkBfBHOcRd1fAdezg7JlHNOokohdAp3WkI/0, createdBy=32c81964262, createdName=1e145228m78(暂无匿称), createdTime=Tue Apr 25 22:44:54 CST 2017, time=2017-04-25, status=1, ipAttribution=)]
    2017-06-06 lofter

    学习了,感谢分享!

    0

  4. [GetPortalCommentsPageByObjectIdResponse(id=1972998, encodeId=2bf119e299811, content=<a href='/topic/show?id=72d566e3a6' target=_blank style='color:#2F92EE;'>#eLife#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=64, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=6673, encryptionId=72d566e3a6, topicName=eLife)], attachment=null, authenticateStatus=null, createdAvatar=http://thirdqq.qlogo.cn/qqapp/1103841572/C2EFD5CFB07FE291138AD4FD0C98E3DE/100, createdBy=e3d52500031, createdName=膀胱癌, createdTime=Mon Mar 19 06:46:00 CST 2018, time=2018-03-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2068499, encodeId=0e942068499f5, content=<a href='/topic/show?id=59371088215' target=_blank style='color:#2F92EE;'>#Life#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=70, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=10882, encryptionId=59371088215, topicName=Life)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=fc8528, createdName=clmlylxy, createdTime=Tue Jul 04 15:46:00 CST 2017, time=2017-07-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=207130, encodeId=c8e120e1308b, content=学习了,感谢分享!, beContent=null, objectType=article, channel=null, level=null, likeNumber=112, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://q.qlogo.cn/qqapp/1103841572/C20CB8E4EBB36F5B821651C710BCB491/100, createdBy=18de1715848, createdName=lofter, createdTime=Tue Jun 06 07:36:05 CST 2017, time=2017-06-06, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=193302, encodeId=6d8d19330200, content=不明觉厉, beContent=null, objectType=article, channel=null, level=null, likeNumber=105, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/NUyjXTCJjo6O55qCRv6IXDt3IYfwIL1e8FF15SyUqOez3JicibhLWSNib3MbuMkicVm1ZAp33VenfMYmj8oJM08SWSSHXc5jFj9ic/0, createdBy=2db52049023, createdName=franksmmu, createdTime=Wed May 03 15:15:40 CST 2017, time=2017-05-03, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=190552, encodeId=b96a190552c9, content=学习了,谢谢作者分享!, beContent=null, objectType=article, channel=null, level=null, likeNumber=114, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/mONcle9pic3xJXLtMtt5B40XXuPjn9xn1rBhrM6fHLkX1hI86ZoWoPJkgDkZuJNKkBfBHOcRd1fAdezg7JlHNOokohdAp3WkI/0, createdBy=32c81964262, createdName=1e145228m78(暂无匿称), createdTime=Tue Apr 25 22:44:54 CST 2017, time=2017-04-25, status=1, ipAttribution=)]
    2017-05-03 franksmmu

    不明觉厉

    0

  5. [GetPortalCommentsPageByObjectIdResponse(id=1972998, encodeId=2bf119e299811, content=<a href='/topic/show?id=72d566e3a6' target=_blank style='color:#2F92EE;'>#eLife#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=64, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=6673, encryptionId=72d566e3a6, topicName=eLife)], attachment=null, authenticateStatus=null, createdAvatar=http://thirdqq.qlogo.cn/qqapp/1103841572/C2EFD5CFB07FE291138AD4FD0C98E3DE/100, createdBy=e3d52500031, createdName=膀胱癌, createdTime=Mon Mar 19 06:46:00 CST 2018, time=2018-03-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2068499, encodeId=0e942068499f5, content=<a href='/topic/show?id=59371088215' target=_blank style='color:#2F92EE;'>#Life#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=70, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=10882, encryptionId=59371088215, topicName=Life)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=fc8528, createdName=clmlylxy, createdTime=Tue Jul 04 15:46:00 CST 2017, time=2017-07-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=207130, encodeId=c8e120e1308b, content=学习了,感谢分享!, beContent=null, objectType=article, channel=null, level=null, likeNumber=112, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://q.qlogo.cn/qqapp/1103841572/C20CB8E4EBB36F5B821651C710BCB491/100, createdBy=18de1715848, createdName=lofter, createdTime=Tue Jun 06 07:36:05 CST 2017, time=2017-06-06, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=193302, encodeId=6d8d19330200, content=不明觉厉, beContent=null, objectType=article, channel=null, level=null, likeNumber=105, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/NUyjXTCJjo6O55qCRv6IXDt3IYfwIL1e8FF15SyUqOez3JicibhLWSNib3MbuMkicVm1ZAp33VenfMYmj8oJM08SWSSHXc5jFj9ic/0, createdBy=2db52049023, createdName=franksmmu, createdTime=Wed May 03 15:15:40 CST 2017, time=2017-05-03, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=190552, encodeId=b96a190552c9, content=学习了,谢谢作者分享!, beContent=null, objectType=article, channel=null, level=null, likeNumber=114, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/mONcle9pic3xJXLtMtt5B40XXuPjn9xn1rBhrM6fHLkX1hI86ZoWoPJkgDkZuJNKkBfBHOcRd1fAdezg7JlHNOokohdAp3WkI/0, createdBy=32c81964262, createdName=1e145228m78(暂无匿称), createdTime=Tue Apr 25 22:44:54 CST 2017, time=2017-04-25, status=1, ipAttribution=)]
    2017-04-25 1e145228m78(暂无匿称)

    学习了,谢谢作者分享!

    0

相关资讯

J Endod:MTA/聚已内酯3维支架材料促进组织再生的成骨特性研究

这篇研究的目的是为了评估MTA/聚已内酯(MTA/PCL)混合3维(3D)支架材料是否可以为人牙髓细胞(hDPCs)的成骨分化提供适宜的微环境,并进一步研究MTA/PCL复合物对混合支架材料生物活动的影响。

Cell Rep:解密血细胞的“前身”,隐藏颇深!

瑞典隆德大学的科学家们对人类发育过程中第一个血细胞形成的过程有了新的见解,即内皮细胞可以转变成不同类型的血细胞。使用人类干细胞发育模型,同时观察每个血细胞和内皮细胞基因的表达情况,他们发现了内皮状态—混合内皮/血液状态—血液状态进程。这是第一项在人类发育背景下展示该转变过程的研究。负责该研究的教授Niels-Bjarne Woods说:“了解第一个血细胞的发育过程将为我们提供原先缺失的线索以研究血

Nat Commun:清华大学吴耀炯课题组揭示皮肤干细胞修复再生关键作用

日前,国际学术权威刊物自然出版集团旗下子刊《Nature Communications》杂志上在线发表了清华大学伯克利深圳学院(TBSI)精准医疗与健康研究中心、清华大学深圳研究生院生命与健康学部吴耀炯教授题为“巨噬细胞通过AKT/β-catenin信号通路激活毛囊干细胞促进再生”(Macrophages induce AKT/β-catenin-dependent Lgr5+ stem cell

细胞治疗技术迎来医学新浪潮,生物谷十年聚焦产业发展

2016年4月,震动全世界的魏则西事件,除了让百度、莆田系、部队医院等成为众矢之的,也将癌症免疫细胞治疗的乱象曝光于众。同年5月初,国家卫计委重申,要求进一步加强对违规医疗行为的监管和打击力度,并紧急叫停细胞免疫治疗临床应用。这是继2015年6月29日国家卫生计生委对准入审批调整后的又一次变局。自此,已在全国多家医院商业性应用并收费的免疫疗法,纷纷踩下刹车。但时隔一年,今年3月,国家卫计委强调,免

Oncotarget:中南大学梁德生课题组发表基因编辑干细胞对肿瘤生长抑制的研究进展

日前,国际肿瘤学学术期刊《Oncotarget》杂志上在线发表了中南大学生命科学学院医学遗传学国家重点实验室梁德生课题组在基因编辑干细胞抑制肿瘤生长研究的新进展,文章题为“Enhanced tumor growth inhibition by mesenchymal stem cells derived from iPSCs with targeted integration of interle

J Endod:碱性成纤维生长因子调节人牙髓细胞增殖、分化和基质形成相关基因蛋白表达的研究

在多种组织内,碱性成纤维生长因子(bFGF)对细胞增殖、分化和细胞外基质的更新发挥着不同作用。然而,bFGF对牙髓细胞的作用却知之甚少。这项研究是为了阐明bFGF是否会影响人牙髓细胞(HDPCs)的分化和基质更新以及相关基因蛋白的表达,并探讨丝裂原活化蛋白激酶(MEK)/胞外信号调节激酶(ERK)信号通路在这一过程中发挥的作用。

Baidu
map
Baidu
map
Baidu
map