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Cell Reports:阻断MK2的基因可增加p53突变肿瘤细胞化疗敏感性

2013-11-18 佚名 生物通

大约一半的癌症患者具有p53基因突变,使得即便是在化疗严重损伤它们的DNA之后,肿瘤仍能够生存并继续生长。 来自麻省理工学院生物学家们的一项新研究发现,通过阻断另一个叫做MK2的基因可使得p53突变肿瘤细胞对化疗更加敏感。在一项小鼠研究中,缺失p53和MK2的肿瘤当给予顺铂药物治疗时显著缩小,而具有功能性MK2的肿瘤则在治疗后继续生长。这项研究发表在11月14日的Ce

大约一半的癌症患者具有p53基因突变,使得即便是在化疗严重损伤它们的DNA之后,肿瘤仍能够生存并继续生长。

来自麻省理工学院生物学家们的一项新研究发现,通过阻断另一个叫做MK2的基因可使得p53突变肿瘤细胞对化疗更加敏感。在一项小鼠研究中,缺失p53和MK2的肿瘤当给予顺铂药物治疗时显著缩小,而具有功能性MK2的肿瘤则在治疗后继续生长。这项研究发表在11月14日的Cell Reports杂志上。【原文下载】

论文的资深作者、麻省理工学院综合癌症研究所成员Michael Yaffe教授说,这些研究结果表明给予患者一种DNA损伤药物组合MK2抑制剂有可能非常的有效。

几种MK2抑制药现已进入临床试验,用于治疗关节炎和大肠炎等炎症性疾病,但这些药物从未作为有可能的癌症治疗进行测试。

Yaffe说:“我们的研究实际告诉我们,这些药物有可能联合化疗,获得全新的第二生命。我们非常希望它将能够进入到癌症临床试验。”


杀死肿瘤

P53是一种可控制细胞分裂的抑癌蛋白。在细胞分裂开始前,p53检测细胞的DNA并在必要情况下启动修复。如果DNA损伤太过广泛,p53则会迫使细胞经受程序性细胞死亡。缺失p53的肿瘤可以避免这一命运。

“通常p53是细胞死亡的主要驱动力,如果细胞丧失这一信号通路,它们会对引起细胞死亡的不同治疗产生抵抗,”论文的主要作者、Koch研究所博士后Sandra Morandell说。

几年前,Yaffe实验室的研究人员发现,在p53突变癌细胞中MK2基因帮助拮抗了化疗的效应。当癌细胞遭受DNA损伤时,MK2踩下细胞分裂周期的刹车,给予细胞时间在分裂前修复这一损伤。

“我们的数据表明,如果你阻断MK2信号通路,肿瘤细胞就不能识别出它们具有DNA损伤,在这种情况下它们将继续尝试进行细胞分裂,最终自杀,”Yaffe说。

在这项新研究中,研究人员想看看在活体动物的肿瘤以及培养皿培育的细胞中,是否同样是这种情况。为此,他们利用了一种遗传编程形成非小细胞肺癌的小鼠品系。研究人员进一步改造小鼠使得他们能够可逆性地开启或关闭MK2,从而在同一动物中研究了具有或丧失MK2的肿瘤。

采用这种新方法,他们第一次在同一小鼠中比较了不同类型的肿瘤,除了MK2表达小鼠中所有的遗传因素均完全相同。

利用这些小鼠研究人员发现,治疗前缺失MK2和p53的肿瘤生长速度快于具有MK2的肿瘤。这表明单独使用MK2抑制剂治疗肿瘤实际上弊大于利,有可能通过拉开细胞周期的刹车而提高了肿瘤生长率。 然而,当用顺铂治疗这些肿瘤时,缺失MK2的肿瘤显著缩小,而那些具有MK2的肿瘤继续生长。

一个不明显的组合

顺铂与MK2抑制剂这一潜在组合不同于其他获得FDA批准的化疗组合,后者是由各自显示出益处的数对药物组成。“我们发现了一种你永远无法在其他方面获得的组合,是一种不明显的组合。”

虽然这项研究侧重于非小细胞肺癌,研究人员在实验室培育骨癌、宫颈癌和卵巢癌细胞中获得了相似的结果。他们现正研究结肠癌和卵巢癌动物模型。

原文出处:

Sandra Morandell;H.Christian Reinhardt;Ian G.Cannell;Jacob S. Kim;Daniela M. Ruf;Tanya Mitra;Anthony D. Couvillon; Tyler Jacks;and Michael B. Yaffe1.A Reversible Gene-Targeting Strategy Identifies Synthetic Lethal Interactions between MK2 and p53 in the DNA Damage Response In Vivo.Cell Reports, 14 November 2013.【原文下载】


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    2014-06-12 维他命
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  4. [GetPortalCommentsPageByObjectIdResponse(id=2028869, encodeId=ca0c2028869b7, content=<a href='/topic/show?id=b2bd33559be' target=_blank style='color:#2F92EE;'>#化疗敏感#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=94, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=33559, encryptionId=b2bd33559be, topicName=化疗敏感)], attachment=null, authenticateStatus=null, createdAvatar=http://thirdqq.qlogo.cn/qqapp/101296147/6238544484D1FE65CCBBD849EAEE67C2/100, createdBy=47102500004, createdName=ms9651749636653578, createdTime=Tue Jan 07 05:04:00 CST 2014, time=2014-01-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1958952, encodeId=23ae1958952ce, content=<a href='/topic/show?id=dbe6445416' target=_blank style='color:#2F92EE;'>#CEL#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=76, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4454, encryptionId=dbe6445416, topicName=CEL)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c3ff68, createdName=维他命, createdTime=Thu Jun 12 20:04:00 CST 2014, time=2014-06-12, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1868713, encodeId=b20c1868e134f, content=<a href='/topic/show?id=fd764459a8' target=_blank style='color:#2F92EE;'>#Cell#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=61, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4459, encryptionId=fd764459a8, topicName=Cell)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=524d95, createdName=zhaozhouchifen, createdTime=Tue Oct 14 03:04:00 CST 2014, time=2014-10-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1709980, encodeId=83f11e09980d3, content=<a href='/topic/show?id=7ac59e67604' target=_blank style='color:#2F92EE;'>#阻断#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=64, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=97676, encryptionId=7ac59e67604, topicName=阻断)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=b5ca31824852, createdName=41514497@qq.com, createdTime=Wed Dec 11 17:04:00 CST 2013, time=2013-12-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1312887, encodeId=bb68131288e93, content=<a href='/topic/show?id=4ce783062c7' target=_blank style='color:#2F92EE;'>#肿瘤细胞#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=52, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=83062, encryptionId=4ce783062c7, topicName=肿瘤细胞)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c859411, createdName=hmwwww, createdTime=Wed Nov 20 04:04:00 CST 2013, time=2013-11-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1372351, encodeId=846713e23518c, content=<a href='/topic/show?id=9d861362e53' target=_blank style='color:#2F92EE;'>#p53#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=66, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=13627, encryptionId=9d861362e53, topicName=p53)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=5d70341, createdName=zhishijing, createdTime=Wed Nov 20 04:04:00 CST 2013, time=2013-11-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1388294, encodeId=e6ef138829425, content=<a href='/topic/show?id=7ef25e5346b' target=_blank style='color:#2F92EE;'>#敏感性#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=62, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=57534, encryptionId=7ef25e5346b, topicName=敏感性)], attachment=null, authenticateStatus=null, createdAvatar=https://thirdwx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTJnkE6UvGFfMS41qV0RicWvVTTeLMicqibeZH5GqO4YhNicyl1Y9jFhylIUBn9ntPYy9jhk5hrfic5cRYw/132, createdBy=5f822500020, createdName=ms5236388012055669, createdTime=Wed Nov 20 04:04:00 CST 2013, time=2013-11-20, status=1, ipAttribution=)]
  5. [GetPortalCommentsPageByObjectIdResponse(id=2028869, encodeId=ca0c2028869b7, content=<a href='/topic/show?id=b2bd33559be' target=_blank style='color:#2F92EE;'>#化疗敏感#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=94, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=33559, encryptionId=b2bd33559be, topicName=化疗敏感)], attachment=null, authenticateStatus=null, createdAvatar=http://thirdqq.qlogo.cn/qqapp/101296147/6238544484D1FE65CCBBD849EAEE67C2/100, createdBy=47102500004, createdName=ms9651749636653578, createdTime=Tue Jan 07 05:04:00 CST 2014, time=2014-01-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1958952, encodeId=23ae1958952ce, content=<a href='/topic/show?id=dbe6445416' target=_blank style='color:#2F92EE;'>#CEL#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=76, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4454, encryptionId=dbe6445416, topicName=CEL)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c3ff68, createdName=维他命, createdTime=Thu Jun 12 20:04:00 CST 2014, time=2014-06-12, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1868713, encodeId=b20c1868e134f, content=<a href='/topic/show?id=fd764459a8' target=_blank style='color:#2F92EE;'>#Cell#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=61, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4459, encryptionId=fd764459a8, topicName=Cell)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=524d95, createdName=zhaozhouchifen, createdTime=Tue Oct 14 03:04:00 CST 2014, time=2014-10-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1709980, encodeId=83f11e09980d3, content=<a href='/topic/show?id=7ac59e67604' target=_blank style='color:#2F92EE;'>#阻断#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=64, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=97676, encryptionId=7ac59e67604, topicName=阻断)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=b5ca31824852, createdName=41514497@qq.com, createdTime=Wed Dec 11 17:04:00 CST 2013, time=2013-12-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1312887, encodeId=bb68131288e93, content=<a href='/topic/show?id=4ce783062c7' target=_blank style='color:#2F92EE;'>#肿瘤细胞#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=52, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=83062, encryptionId=4ce783062c7, topicName=肿瘤细胞)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c859411, createdName=hmwwww, createdTime=Wed Nov 20 04:04:00 CST 2013, time=2013-11-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1372351, encodeId=846713e23518c, content=<a href='/topic/show?id=9d861362e53' target=_blank style='color:#2F92EE;'>#p53#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=66, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=13627, encryptionId=9d861362e53, topicName=p53)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=5d70341, createdName=zhishijing, createdTime=Wed Nov 20 04:04:00 CST 2013, time=2013-11-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1388294, encodeId=e6ef138829425, content=<a href='/topic/show?id=7ef25e5346b' target=_blank style='color:#2F92EE;'>#敏感性#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=62, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=57534, encryptionId=7ef25e5346b, topicName=敏感性)], attachment=null, authenticateStatus=null, createdAvatar=https://thirdwx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTJnkE6UvGFfMS41qV0RicWvVTTeLMicqibeZH5GqO4YhNicyl1Y9jFhylIUBn9ntPYy9jhk5hrfic5cRYw/132, createdBy=5f822500020, createdName=ms5236388012055669, createdTime=Wed Nov 20 04:04:00 CST 2013, time=2013-11-20, status=1, ipAttribution=)]
  6. [GetPortalCommentsPageByObjectIdResponse(id=2028869, encodeId=ca0c2028869b7, content=<a href='/topic/show?id=b2bd33559be' target=_blank style='color:#2F92EE;'>#化疗敏感#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=94, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=33559, encryptionId=b2bd33559be, topicName=化疗敏感)], attachment=null, authenticateStatus=null, createdAvatar=http://thirdqq.qlogo.cn/qqapp/101296147/6238544484D1FE65CCBBD849EAEE67C2/100, createdBy=47102500004, createdName=ms9651749636653578, createdTime=Tue Jan 07 05:04:00 CST 2014, time=2014-01-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1958952, encodeId=23ae1958952ce, content=<a href='/topic/show?id=dbe6445416' target=_blank style='color:#2F92EE;'>#CEL#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=76, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4454, encryptionId=dbe6445416, topicName=CEL)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c3ff68, createdName=维他命, createdTime=Thu Jun 12 20:04:00 CST 2014, time=2014-06-12, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1868713, encodeId=b20c1868e134f, content=<a href='/topic/show?id=fd764459a8' target=_blank style='color:#2F92EE;'>#Cell#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=61, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4459, encryptionId=fd764459a8, topicName=Cell)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=524d95, createdName=zhaozhouchifen, createdTime=Tue Oct 14 03:04:00 CST 2014, time=2014-10-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1709980, encodeId=83f11e09980d3, content=<a href='/topic/show?id=7ac59e67604' target=_blank style='color:#2F92EE;'>#阻断#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=64, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=97676, encryptionId=7ac59e67604, topicName=阻断)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=b5ca31824852, createdName=41514497@qq.com, createdTime=Wed Dec 11 17:04:00 CST 2013, time=2013-12-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1312887, encodeId=bb68131288e93, content=<a href='/topic/show?id=4ce783062c7' target=_blank style='color:#2F92EE;'>#肿瘤细胞#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=52, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=83062, encryptionId=4ce783062c7, topicName=肿瘤细胞)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c859411, createdName=hmwwww, createdTime=Wed Nov 20 04:04:00 CST 2013, time=2013-11-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1372351, encodeId=846713e23518c, content=<a href='/topic/show?id=9d861362e53' target=_blank style='color:#2F92EE;'>#p53#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=66, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=13627, encryptionId=9d861362e53, topicName=p53)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=5d70341, createdName=zhishijing, createdTime=Wed Nov 20 04:04:00 CST 2013, time=2013-11-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1388294, encodeId=e6ef138829425, content=<a href='/topic/show?id=7ef25e5346b' target=_blank style='color:#2F92EE;'>#敏感性#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=62, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=57534, encryptionId=7ef25e5346b, topicName=敏感性)], attachment=null, authenticateStatus=null, createdAvatar=https://thirdwx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTJnkE6UvGFfMS41qV0RicWvVTTeLMicqibeZH5GqO4YhNicyl1Y9jFhylIUBn9ntPYy9jhk5hrfic5cRYw/132, createdBy=5f822500020, createdName=ms5236388012055669, createdTime=Wed Nov 20 04:04:00 CST 2013, time=2013-11-20, status=1, ipAttribution=)]
    2013-11-20 zhishijing
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