Nature:衰老增加肿瘤干细胞的侵略性

2017-12-23 海北 MedSci原创

细胞衰老是应激反应导致的细胞周期停滞,可以终止(前)恶性细胞的进一步扩张。衰老机制的关键信号组分(如p16INK4a,p21CIP1和p53)以及组蛋白H3(H3K9me3)上的赖氨酸9的三甲基化也是干细胞功能的关键调节因子(统称为“干性”)。

细胞衰老是应激反应导致的细胞周期停滞,可以终止(前)恶性细胞的进一步扩张。衰老机制的关键信号组分(如p16INK4ap21CIP1p53)以及组蛋白H3H3K9me3)上的赖氨酸9的三甲基化也是干细胞功能的关键调节因子(统称为干性)。在癌细胞中,干细胞增殖可能对肿瘤的侵袭性和临床结果具有深远的影响。

近日,来自柏林夏里特医学院的研究人员探究了化疗引起的衰老是否可以改变恶性细胞的干细胞相关特性。研究人员比较了来自Eμ-Myc转基因小鼠的衰老和非衰老B细胞淋巴瘤的基因表达和功能分析,揭示成年组织干细胞标记,激活的Wnt信号传导,以及不同的干细胞标志物在衰老细胞中显着上调。

使用基因可切换的靶向H3K9me3p53的衰老模型模拟从细胞静息状态中的逃脱,研究人员发现从衰老释放的细胞能够重新进入细胞周期,与同样暴露于化疗,但从来没有衰老过的群体相比,具有强烈增强的和Wnt依赖的克隆生长潜力。

在体内,这些先前的衰老细胞呈现出更高的起始肿瘤可能性。值得注意的是,在急性淋巴细胞白血病和急性骨髓性白血病的p53可调节模型中的暂时执行衰老,可以将大量非干细胞白血病细胞重编程为自我更新的白血病起始干细胞。

研究人员的数据得到了人类癌症细胞系和人类血液系统恶性肿瘤原始样本一致结果的进一步支持,结果显示衰老相关干性是一种意想不到的细胞自主特征,在从细胞静息中逃脱时发挥其有害的,高侵略性的生长潜力,并且在复发性肿瘤中富集。


原始出处:

Maja Milanovic et al. Senescence-associated reprogramming promotes cancer stemnessNature, 2017. doi:10.1038/nature25167.


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    2018-08-15 liye789132251
  2. [GetPortalCommentsPageByObjectIdResponse(id=1882726, encodeId=a7741882e26c1, content=<a href='/topic/show?id=3b2112532d8' target=_blank style='color:#2F92EE;'>#Nat#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=33, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=12532, encryptionId=3b2112532d8, topicName=Nat)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2e6f107, createdName=liye789132251, createdTime=Wed Aug 15 16:13:00 CST 2018, time=2018-08-15, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1992293, encodeId=a3cd199229367, content=<a href='/topic/show?id=bb49269921a' target=_blank style='color:#2F92EE;'>#侵略性#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=34, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=26992, encryptionId=bb49269921a, topicName=侵略性)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c3ae503, createdName=pps20019, createdTime=Wed Sep 12 16:13:00 CST 2018, time=2018-09-12, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=277565, encodeId=2eb82e75655a, content=非常好的文章.学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=47, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/NUyjXTCJjo7LIiaRZTzJ3SEfiauCzTMPW7YvPPYLNJBXG9oh6Al1icq2VQQkIHWxqXehcicTS62YKJVBhxeth3wggw/0, createdBy=7ce01621306, createdName=天涯183, createdTime=Thu Jan 11 18:17:24 CST 2018, time=2018-01-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=271855, encodeId=32212e1855df, content=学习了.涨知识了!, beContent=null, objectType=article, channel=null, level=null, likeNumber=52, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/ajNVdqHZLLDM9swhbgTo7nzqRKzMmzckmEoeTyLQVDCgjqsicjyhxPs0vPoYU6GsSYbCjSkNHicJkz3NL0a0EbUMVdNjkctXI6FocpGKaVr9E/0, createdBy=29392048316, createdName=王秀, createdTime=Sat Dec 23 13:37:47 CST 2017, time=2017-12-23, status=1, ipAttribution=)]
  3. [GetPortalCommentsPageByObjectIdResponse(id=1882726, encodeId=a7741882e26c1, content=<a href='/topic/show?id=3b2112532d8' target=_blank style='color:#2F92EE;'>#Nat#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=33, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=12532, encryptionId=3b2112532d8, topicName=Nat)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2e6f107, createdName=liye789132251, createdTime=Wed Aug 15 16:13:00 CST 2018, time=2018-08-15, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1992293, encodeId=a3cd199229367, content=<a href='/topic/show?id=bb49269921a' target=_blank style='color:#2F92EE;'>#侵略性#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=34, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=26992, encryptionId=bb49269921a, topicName=侵略性)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c3ae503, createdName=pps20019, createdTime=Wed Sep 12 16:13:00 CST 2018, time=2018-09-12, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=277565, encodeId=2eb82e75655a, content=非常好的文章.学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=47, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/NUyjXTCJjo7LIiaRZTzJ3SEfiauCzTMPW7YvPPYLNJBXG9oh6Al1icq2VQQkIHWxqXehcicTS62YKJVBhxeth3wggw/0, createdBy=7ce01621306, createdName=天涯183, createdTime=Thu Jan 11 18:17:24 CST 2018, time=2018-01-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=271855, encodeId=32212e1855df, content=学习了.涨知识了!, beContent=null, objectType=article, channel=null, level=null, likeNumber=52, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/ajNVdqHZLLDM9swhbgTo7nzqRKzMmzckmEoeTyLQVDCgjqsicjyhxPs0vPoYU6GsSYbCjSkNHicJkz3NL0a0EbUMVdNjkctXI6FocpGKaVr9E/0, createdBy=29392048316, createdName=王秀, createdTime=Sat Dec 23 13:37:47 CST 2017, time=2017-12-23, status=1, ipAttribution=)]
    2018-01-11 天涯183

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    0

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    2017-12-23 王秀

    学习了.涨知识了!

    0

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